URL: bound '@' search to authority section

The '@' delimiter for userinfo was searched across the full URL string,
including path, query, and fragment. A URL like `http://attacker.com/@bank.com/`
would incorrectly parse `bank.com` as the host, enabling a Same-Origin Policy bypass.

Restrict the '@' search to the authority section (before any `/?#`) in
getOrigin, getUserInfo, and getHost.

.github/actions/install/action.yml

@@ -13,7 +13,7 @@ inputs:
   zig-v8:
     description: 'zig v8 version to install'
     required: false
-    default: 'v0.3.4'
+    default: 'v0.3.7'
   v8:
     description: 'v8 version to install'
     required: false

.github/workflows/nightly.yml

@@ -7,7 +7,7 @@ env:
   AWS_REGION: ${{ vars.NIGHTLY_BUILD_AWS_REGION }}
 
   RELEASE: ${{ github.ref_type == 'tag' && github.ref_name || 'nightly' }}
-  VERSION: ${{ github.ref_type == 'tag' && github.ref_name || '1.0.0-nightly' }}
+  VERSION_FLAG: ${{ github.ref_type == 'tag' && format('-Dversion_string={0}', github.ref_name) || format('-Dpre_version={0}', 'nightly') }}
 
 on:
   push:
@@ -45,7 +45,7 @@ jobs:
         run: zig build -Dprebuilt_v8_path=v8/libc_v8.a -Doptimize=ReleaseFast snapshot_creator -- src/snapshot.bin
 
       - name: zig build
-        run: zig build -Dsnapshot_path=../../snapshot.bin -Dprebuilt_v8_path=v8/libc_v8.a -Doptimize=ReleaseFast -Dcpu=x86_64 -Dversion_string=${{ env.VERSION }}
+        run: zig build -Dsnapshot_path=../../snapshot.bin -Dprebuilt_v8_path=v8/libc_v8.a -Doptimize=ReleaseFast -Dcpu=x86_64 ${{ env.VERSION_FLAG }}
 
       - name: Rename binary
         run: mv zig-out/bin/lightpanda lightpanda-${{ env.ARCH }}-${{ env.OS }}
@@ -85,7 +85,7 @@ jobs:
         run: zig build -Dprebuilt_v8_path=v8/libc_v8.a -Doptimize=ReleaseFast snapshot_creator -- src/snapshot.bin
 
       - name: zig build
-        run: zig build -Dsnapshot_path=../../snapshot.bin -Dprebuilt_v8_path=v8/libc_v8.a -Doptimize=ReleaseFast -Dcpu=generic -Dversion_string=${{ env.VERSION }}
+        run: zig build -Dsnapshot_path=../../snapshot.bin -Dprebuilt_v8_path=v8/libc_v8.a -Doptimize=ReleaseFast -Dcpu=generic ${{ env.VERSION_FLAG }}
 
       - name: Rename binary
         run: mv zig-out/bin/lightpanda lightpanda-${{ env.ARCH }}-${{ env.OS }}
@@ -127,7 +127,7 @@ jobs:
         run: zig build -Dprebuilt_v8_path=v8/libc_v8.a -Doptimize=ReleaseFast snapshot_creator -- src/snapshot.bin
 
       - name: zig build
-        run: zig build -Dsnapshot_path=../../snapshot.bin -Dprebuilt_v8_path=v8/libc_v8.a -Doptimize=ReleaseFast -Dversion_string=${{ env.VERSION }}
+        run: zig build -Dsnapshot_path=../../snapshot.bin -Dprebuilt_v8_path=v8/libc_v8.a -Doptimize=ReleaseFast ${{ env.VERSION_FLAG }}
 
       - name: Rename binary
         run: mv zig-out/bin/lightpanda lightpanda-${{ env.ARCH }}-${{ env.OS }}
@@ -167,7 +167,7 @@ jobs:
         run: zig build -Dprebuilt_v8_path=v8/libc_v8.a -Doptimize=ReleaseFast snapshot_creator -- src/snapshot.bin
 
       - name: zig build
-        run: zig build -Dsnapshot_path=../../snapshot.bin -Dprebuilt_v8_path=v8/libc_v8.a -Doptimize=ReleaseFast -Dversion_string=${{ env.VERSION }}
+        run: zig build -Dsnapshot_path=../../snapshot.bin -Dprebuilt_v8_path=v8/libc_v8.a -Doptimize=ReleaseFast ${{ env.VERSION_FLAG }}
 
       - name: Rename binary
         run: mv zig-out/bin/lightpanda lightpanda-${{ env.ARCH }}-${{ env.OS }}

Dockerfile

@@ -3,7 +3,7 @@ FROM debian:stable-slim
 ARG MINISIG=0.12
 ARG ZIG_MINISIG=RWSGOq2NVecA2UPNdBUZykf1CCb147pkmdtYxgb3Ti+JO/wCYvhbAb/U
 ARG V8=14.0.365.4
-ARG ZIG_V8=v0.3.4
+ARG ZIG_V8=v0.3.7
 ARG TARGETPLATFORM
 
 RUN apt-get update -yq && \

build.zig

@@ -728,8 +728,17 @@ fn resolveVersion(b: *std.Build) std.SemanticVersion {
         };
     }
 
+    const pre_version = b.option([]const u8, "pre_version", "Override the pre version of this build");
+    const pre = blk: {
+        if (pre_version) |pre| {
+            break :blk pre;
+        }
+
+        break :blk lightpanda_version.pre;
+    };
+
     // If it's a stable release (no pre or build metadata in build.zig.zon), use it as is
-    if (lightpanda_version.pre == null and lightpanda_version.build == null) return lightpanda_version;
+    if (pre == null and lightpanda_version.build == null) return lightpanda_version;
 
     // For dev/nightly versions, calculate the commit count and hash
     const git_hash_raw = runGit(b, &.{ "rev-parse", "--short", "HEAD" }) catch return lightpanda_version;
@@ -742,7 +751,7 @@ fn resolveVersion(b: *std.Build) std.SemanticVersion {
         .major = lightpanda_version.major,
         .minor = lightpanda_version.minor,
         .patch = lightpanda_version.patch,
-        .pre = b.fmt("{s}.{s}", .{ lightpanda_version.pre.?, commit_count }),
+        .pre = b.fmt("{s}.{s}", .{ pre.?, commit_count }),
         .build = commit_hash,
     };
 }

build.zig.zon

@@ -5,8 +5,8 @@
     .minimum_zig_version = "0.15.2",
     .dependencies = .{
         .v8 = .{
-            .url = "https://github.com/lightpanda-io/zig-v8-fork/archive/refs/tags/v0.3.4.tar.gz",
+            .url = "https://github.com/lightpanda-io/zig-v8-fork/archive/refs/tags/v0.3.7.tar.gz",
-            .hash = "v8-0.0.0-xddH6_F3BAAiFvKY6R1H-gkuQlk19BkDQ0--uZuTrSup",
+            .hash = "v8-0.0.0-xddH67uBBAD95hWsPQz3Ni1PlZjdywtPXrGUAp8rSKco",
         },
         // .v8 = .{ .path = "../zig-v8-fork" },
         .brotli = .{

src/Config.zig

@@ -247,7 +247,7 @@ pub const Fetch = struct {
     with_frames: bool = false,
     strip: dump.Opts.Strip = .{},
     wait_ms: u32 = 5000,
-    wait_until: WaitUntil = .load,
+    wait_until: WaitUntil = .done,
 };
 
 pub const Common = struct {
@@ -665,7 +665,7 @@ fn parseFetchArgs(
     var common: Common = .{};
     var strip: dump.Opts.Strip = .{};
     var wait_ms: u32 = 5000;
-    var wait_until: WaitUntil = .load;
+    var wait_until: WaitUntil = .done;
 
     while (args.next()) |opt| {
         if (std.mem.eql(u8, "--wait-ms", opt) or std.mem.eql(u8, "--wait_ms", opt)) {

src/Server.zig

@@ -27,7 +27,7 @@ const ArenaAllocator = std.heap.ArenaAllocator;
 const log = @import("log.zig");
 const App = @import("App.zig");
 const Config = @import("Config.zig");
-const CDP = @import("cdp/cdp.zig").CDP;
+const CDP = @import("cdp/CDP.zig");
 const Net = @import("network/websocket.zig");
 const HttpClient = @import("browser/HttpClient.zig");
 
@@ -212,7 +212,7 @@ pub const Client = struct {
     http: *HttpClient,
     ws: Net.WsConnection,
 
-    fn init(
+    pub fn init(
         socket: posix.socket_t,
         allocator: Allocator,
         app: *App,
@@ -250,7 +250,7 @@ pub const Client = struct {
         self.ws.shutdown();
     }
 
-    fn deinit(self: *Client) void {
+    pub fn deinit(self: *Client) void {
         switch (self.mode) {
             .cdp => |*cdp| cdp.deinit(),
             .http => {},
@@ -461,7 +461,7 @@ pub const Client = struct {
 
     fn upgradeConnection(self: *Client, request: []u8) !void {
         try self.ws.upgrade(request);
-        self.mode = .{ .cdp = try CDP.init(self.app, self.http, self) };
+        self.mode = .{ .cdp = try CDP.init(self) };
     }
 
     fn writeHTTPErrorResponse(self: *Client, comptime status: u16, comptime body: []const u8) void {

src/browser/Page.zig

@@ -300,7 +300,9 @@ pub fn init(self: *Page, frame_id: u32, session: *Session, parent: ?*Page) !void
         ._performance = Performance.init(),
         ._screen = screen,
         ._visual_viewport = visual_viewport,
+        ._cross_origin_wrapper = undefined,
     });
+    self.window._cross_origin_wrapper = .{ .window = self.window };
 
     self._style_manager = try StyleManager.init(self);
     errdefer self._style_manager.deinit();
@@ -3587,12 +3589,7 @@ test "WebApi: Page" {
 }
 
 test "WebApi: Frames" {
-    // TOO FLAKY, disabled for now
+    try testing.htmlRunner("frames", .{});
-
-    // const filter: testing.LogFilter = .init(&.{.js});
-    // defer filter.deinit();
-
-    // try testing.htmlRunner("frames", .{});
 }
 
 test "WebApi: Integration" {

src/browser/URL.zig

@@ -404,10 +404,6 @@ pub fn getOrigin(allocator: Allocator, raw: [:0]const u8) !?[]const u8 {
     }
 
     var authority_start = scheme_end + 3;
-    const has_user_info = if (std.mem.indexOf(u8, raw[authority_start..], "@")) |pos| blk: {
-        authority_start += pos + 1;
-        break :blk true;
-    } else false;
 
     // Find end of authority (start of path/query/fragment or end of string)
     const authority_end_relative = std.mem.indexOfAny(u8, raw[authority_start..], "/?#");
@@ -416,6 +412,12 @@ pub fn getOrigin(allocator: Allocator, raw: [:0]const u8) !?[]const u8 {
     else
         raw.len;
 
+    // We mustn't search the `@` after the first path separator.
+    const has_user_info = if (std.mem.indexOf(u8, raw[authority_start..authority_end], "@")) |pos| blk: {
+        authority_start += pos + 1;
+        break :blk true;
+    } else false;
+
     // Check for port in the host:port section
     const host_part = raw[authority_start..authority_end];
     if (std.mem.lastIndexOfScalar(u8, host_part, ':')) |colon_pos_in_host| {
@@ -461,8 +463,15 @@ fn getUserInfo(raw: [:0]const u8) ?[]const u8 {
     const scheme_end = std.mem.indexOf(u8, raw, "://") orelse return null;
     const authority_start = scheme_end + 3;
 
-    const pos = std.mem.indexOfScalar(u8, raw[authority_start..], '@') orelse return null;
+    // We mustn't search the `@` after the first path separator.
-    const path_start = std.mem.indexOfScalarPos(u8, raw, authority_start, '/') orelse raw.len;
+    const path_start = blk: {
+        if (std.mem.indexOfAny(u8, raw[authority_start..], "/?#")) |idx| {
+            break :blk authority_start + idx;
+        }
+        break :blk raw.len;
+    };
+
+    const pos = std.mem.indexOfScalar(u8, raw[authority_start..path_start], '@') orelse return null;
 
     const full_pos = authority_start + pos;
     if (full_pos < path_start) {
@@ -476,13 +485,20 @@ pub fn getHost(raw: [:0]const u8) []const u8 {
     const scheme_end = std.mem.indexOf(u8, raw, "://") orelse return "";
 
     var authority_start = scheme_end + 3;
-    if (std.mem.indexOf(u8, raw[authority_start..], "@")) |pos| {
+
+    // We mustn't search the `@` after the first path separator.
+    const path_start = blk: {
+        if (std.mem.indexOfAny(u8, raw[authority_start..], "/?#")) |idx| {
+            break :blk authority_start + idx;
+        }
+        break :blk raw.len;
+    };
+
+    if (std.mem.indexOf(u8, raw[authority_start..path_start], "@")) |pos| {
         authority_start += pos + 1;
     }
 
-    const authority = raw[authority_start..];
+    return raw[authority_start..path_start];
-    const path_start = std.mem.indexOfAny(u8, authority, "/?#") orelse return authority;
-    return authority[0..path_start];
 }
 
 // Returns true if these two URLs point to the same document.
@@ -1449,3 +1465,36 @@ test "URL: setPathname percent-encodes" {
     const result3 = try setPathname("https://example.com/path?a=b#hash", "/new path", allocator);
     try testing.expectEqualSlices(u8, "https://example.com/new%20path?a=b#hash", result3);
 }
+
+test "URL: getOrigin" {
+    var arena = std.heap.ArenaAllocator.init(testing.allocator);
+    defer arena.deinit();
+    const allocator = arena.allocator();
+    try testing.expectEqualSlices(u8, "http://example.com:8080", try getOrigin(allocator, "http://example.com:8080/path") orelse unreachable);
+    try testing.expectEqualSlices(u8, "https://example.com:8080", try getOrigin(allocator, "https://example.com:8080/path") orelse unreachable);
+    try testing.expectEqualSlices(u8, "https://example.com", try getOrigin(allocator, "https://example.com/path") orelse unreachable);
+    try testing.expectEqualSlices(u8, "https://example.com", try getOrigin(allocator, "https://example.com:443/") orelse unreachable);
+    try testing.expectEqualSlices(u8, "https://example.com", try getOrigin(allocator, "https://user:pass@example.com/page") orelse unreachable);
+    try testing.expectEqualSlices(u8, "https://example.com:8080", try getOrigin(allocator, "https://user:pass@example.com:8080/page") orelse unreachable);
+    try testing.expectEqual(null, try getOrigin(allocator, "not-a-url"));
+}
+
+test "URL: SOP bypass" {
+    // SOP Bypass
+    try testing.expectEqualSlices(u8, "attacker.com", getHost("http://attacker.com/@bank.com/"));
+    try testing.expectEqualSlices(u8, "attacker.com", getHost("https://attacker.com/@bank.com/"));
+    try testing.expectEqualSlices(u8, "attacker.com", getHost("http://attacker.com?@bank.com/"));
+    try testing.expectEqualSlices(u8, "attacker.com", getHost("http://attacker.com#@bank.com/"));
+    try testing.expectEqualSlices(u8, "attacker.com", getHostname("http://attacker.com/@bank.com/"));
+    try testing.expectEqualSlices(u8, "attacker.com", getHostname("https://attacker.com/@bank.com/"));
+    try testing.expectEqualSlices(u8, "attacker.com", getHostname("http://attacker.com?@bank.com/"));
+    try testing.expectEqualSlices(u8, "attacker.com", getHostname("http://attacker.com#@bank.com/"));
+
+    var arena = std.heap.ArenaAllocator.init(testing.allocator);
+    defer arena.deinit();
+    const allocator = arena.allocator();
+    try testing.expectEqualSlices(u8, "http://attacker.com", try getOrigin(allocator, "http://attacker.com/@bank.com/") orelse unreachable);
+    try testing.expectEqualSlices(u8, "https://attacker.com", try getOrigin(allocator, "https://attacker.com/@bank.com/") orelse unreachable);
+    try testing.expectEqualSlices(u8, "http://attacker.com", try getOrigin(allocator, "http://attacker.com?bank.com/") orelse unreachable);
+    try testing.expectEqualSlices(u8, "http://attacker.com", try getOrigin(allocator, "http://attacker.com#bank.com/") orelse unreachable);
+}

src/browser/js/Caller.zig

@@ -505,6 +505,7 @@ pub const Function = struct {
     pub const Opts = struct {
         noop: bool = false,
         static: bool = false,
+        deletable: bool = true,
         dom_exception: bool = false,
         as_typed_array: bool = false,
         null_as_undefined: bool = false,

src/browser/js/Snapshot.zig

@@ -137,7 +137,7 @@ pub fn create() !Snapshot {
         defer v8.v8__HandleScope__DESTRUCT(&handle_scope);
 
         // Create templates (constructors only) FIRST
-        var templates: [JsApis.len]*v8.FunctionTemplate = undefined;
+        var templates: [JsApis.len]*const v8.FunctionTemplate = undefined;
         inline for (JsApis, 0..) |JsApi, i| {
             @setEvalBranchQuota(10_000);
             templates[i] = generateConstructor(JsApi, isolate);
@@ -419,7 +419,7 @@ fn collectExternalReferences() [countExternalReferences()]isize {
 // via `new ClassName()` - but they could, for example, be created in
 // Zig and returned from a function call, which is why we need the
 // FunctionTemplate.
-fn generateConstructor(comptime JsApi: type, isolate: *v8.Isolate) *v8.FunctionTemplate {
+fn generateConstructor(comptime JsApi: type, isolate: *v8.Isolate) *const v8.FunctionTemplate {
     const callback = blk: {
         if (@hasDecl(JsApi, "constructor")) {
             break :blk JsApi.constructor.func;
@@ -429,7 +429,7 @@ fn generateConstructor(comptime JsApi: type, isolate: *v8.Isolate) *v8.FunctionT
         break :blk illegalConstructorCallback;
     };
 
-    const template = @constCast(v8.v8__FunctionTemplate__New__DEFAULT2(isolate, callback).?);
+    const template = v8.v8__FunctionTemplate__New__DEFAULT2(isolate, callback).?;
     {
         const internal_field_count = comptime countInternalFields(JsApi);
         if (internal_field_count > 0) {
@@ -482,10 +482,15 @@ pub fn countInternalFields(comptime JsApi: type) u8 {
 }
 
 // Attaches JsApi members to the prototype template (normal case)
-fn attachClass(comptime JsApi: type, isolate: *v8.Isolate, template: *v8.FunctionTemplate) void {
+fn attachClass(comptime JsApi: type, isolate: *v8.Isolate, template: *const v8.FunctionTemplate) void {
     const instance = v8.v8__FunctionTemplate__InstanceTemplate(template);
     const prototype = v8.v8__FunctionTemplate__PrototypeTemplate(template);
 
+    // Create a signature that validates the receiver is an instance of this template.
+    // This prevents crashes when JavaScript extracts a getter/method and calls it
+    // with the wrong `this` (e.g., documentGetter.call(null)).
+    const signature = v8.v8__Signature__New(isolate, template);
+
     const declarations = @typeInfo(JsApi).@"struct".decls;
     var has_named_index_getter = false;
 
@@ -497,23 +502,47 @@ fn attachClass(comptime JsApi: type, isolate: *v8.Isolate, template: *v8.Functio
         switch (definition) {
             bridge.Accessor => {
                 const js_name = v8.v8__String__NewFromUtf8(isolate, name.ptr, v8.kNormal, @intCast(name.len));
-                const getter_callback = @constCast(v8.v8__FunctionTemplate__New__Config(isolate, &.{ .callback = value.getter }).?);
+                const getter_signature = if (value.static) null else signature;
+                const getter_callback = v8.v8__FunctionTemplate__New__Config(isolate, &.{
+                    .callback = value.getter,
+                    .signature = getter_signature,
+                }).?;
+                const setter_callback = if (value.setter) |setter|
+                    v8.v8__FunctionTemplate__New__Config(isolate, &.{
+                        .callback = setter,
+                        .signature = getter_signature,
+                    }).?
+                else
+                    null;
+
+                var attribute: v8.PropertyAttribute = 0;
                 if (value.setter == null) {
+                    attribute |= v8.ReadOnly;
+                }
+                if (value.deletable == false) {
+                    attribute |= v8.DontDelete;
+                }
+
                 if (value.static) {
-                        v8.v8__Template__SetAccessorProperty__DEFAULT(@ptrCast(template), js_name, getter_callback);
+                    // Static accessors: use Template's SetAccessorProperty
+                    v8.v8__Template__SetAccessorProperty(@ptrCast(template), js_name, getter_callback, setter_callback, attribute);
                 } else {
-                        v8.v8__ObjectTemplate__SetAccessorProperty__DEFAULT(prototype, js_name, getter_callback);
+                    v8.v8__ObjectTemplate__SetAccessorProperty__Config(prototype, &.{
-                    }
+                        .key = js_name,
-                } else {
+                        .getter = getter_callback,
-                    if (comptime IS_DEBUG) {
+                        .setter = setter_callback,
-                        std.debug.assert(value.static == false);
+                        .attribute = attribute,
-                    }
+                    });
-                    const setter_callback = @constCast(v8.v8__FunctionTemplate__New__Config(isolate, &.{ .callback = value.setter.? }).?);
-                    v8.v8__ObjectTemplate__SetAccessorProperty__DEFAULT2(prototype, js_name, getter_callback, setter_callback);
                 }
             },
             bridge.Function => {
-                const function_template = @constCast(v8.v8__FunctionTemplate__New__Config(isolate, &.{ .callback = value.func, .length = value.arity }).?);
+                // For non-static functions, use the signature to validate the receiver
+                const func_signature = if (value.static) null else signature;
+                const function_template = v8.v8__FunctionTemplate__New__Config(isolate, &.{
+                    .callback = value.func,
+                    .length = value.arity,
+                    .signature = func_signature,
+                }).?;
                 const js_name = v8.v8__String__NewFromUtf8(isolate, name.ptr, v8.kNormal, @intCast(name.len));
                 if (value.static) {
                     v8.v8__Template__Set(@ptrCast(template), js_name, @ptrCast(function_template), v8.None);
@@ -551,7 +580,7 @@ fn attachClass(comptime JsApi: type, isolate: *v8.Isolate, template: *v8.Functio
                 has_named_index_getter = true;
             },
             bridge.Iterator => {
-                const function_template = @constCast(v8.v8__FunctionTemplate__New__Config(isolate, &.{ .callback = value.func }).?);
+                const function_template = v8.v8__FunctionTemplate__New__Config(isolate, &.{ .callback = value.func }).?;
                 const js_name = if (value.async)
                     v8.v8__Symbol__GetAsyncIterator(isolate)
                 else

src/browser/js/bridge.zig

@@ -198,6 +198,7 @@ pub const Function = struct {
 
 pub const Accessor = struct {
     static: bool = false,
+    deletable: bool = true,
     cache: ?Caller.Function.Opts.Caching = null,
     getter: ?*const fn (?*const v8.FunctionCallbackInfo) callconv(.c) void = null,
     setter: ?*const fn (?*const v8.FunctionCallbackInfo) callconv(.c) void = null,
@@ -206,6 +207,7 @@ pub const Accessor = struct {
         var accessor = Accessor{
             .cache = opts.cache,
             .static = opts.static,
+            .deletable = opts.deletable,
         };
 
         if (@typeInfo(@TypeOf(getter)) != .null) {

src/browser/tests/frames/frames.html

@@ -118,24 +118,24 @@
   }
 </script>
 
-<script id=link_click>
+<script id=link_click type=module>
-  testing.async(async (restore) => {
+  const state = await testing.async();
-    let f6;
+
-    await new Promise((resolve) => {
   let count = 0;
-      f6 = document.createElement('iframe');
+  let f6 = document.createElement('iframe');
   f6.id = 'f6';
   f6.addEventListener('load', () => {
     if (++count == 2) {
-          resolve();
+      state.resolve();
       return;
     }
     f6.contentDocument.querySelector('#link').click();
   });
-      f6.src = "support/with_link.html";
+
+  f6.src = 'support/with_link.html';
   document.documentElement.appendChild(f6);
-    });
+
-    restore();
+  await state.done(() => {
     testing.expectEqual("<html><head></head><body>It was clicked!\n</body></html>", f6.contentDocument.documentElement.outerHTML);
   });
 </script>

src/browser/tests/frames/post_message.html

@@ -7,7 +7,6 @@
 {
   let reply = null;
   window.addEventListener('message', (e) => {
-    console.warn('reply')
     reply = e.data;
   });
 

src/browser/tests/frames/support/message_receiver.html

@@ -1,7 +1,6 @@
 <!DOCTYPE html>
 <script>
   window.addEventListener('message', (e) => {
-    console.warn('Frame Message', e.data);
     if (e.data === 'ping') {
       window.top.postMessage({data: 'pong', origin: e.origin}, '*');
     }

src/browser/tests/testing.js

@@ -4,6 +4,7 @@
   let eventuallies = [];
   let async_capture = null;
   let current_script_id = null;
+  let async_pending = 0;
 
   function expectTrue(actual) {
      expectEqual(true, actual);
@@ -64,6 +65,25 @@
   }
 
   async function async(cb) {
+    if (cb == undefined) {
+      let resolve = null
+      const promise = new Promise((r) => { resolve = r});
+      async_pending += 1;
+
+      return {
+        promise: promise,
+        resolve: resolve,
+        capture: {script_id: document.currentScript.id, stack: new Error().stack},
+        done: async function(cb) {
+          await this.promise;
+          async_pending -= 1;
+          async_capture = this.capture;
+          cb();
+          async_capture = false;
+        }
+      };
+    }
+
     let capture = {script_id: document.currentScript.id, stack: new Error().stack};
     await cb(() => { async_capture = capture; });
     async_capture = null;
@@ -74,6 +94,10 @@
       throw new Error('Failed');
     }
 
+    if (async_pending > 0) {
+      return false;
+    }
+
     for (let e of eventuallies) {
       current_script_id = e.script_id;
       e.callback();
@@ -97,6 +121,8 @@
          throw new Error(`script id: '${script_id}' failed: ${status || 'no assertions'}`);
       }
     }
+
+    return true;
   }
 
   const IS_TEST_RUNNER = window.navigator.userAgent.startsWith("Lightpanda/");

src/browser/tests/url.html

@@ -871,3 +871,33 @@
     testing.expectEqual('', url.search);
   }
 </script>
+
+<script id="SOP Bypass">
+  {
+    const url = new URL('http://example.com/@bank.com');
+    testing.expectEqual('http:', url.protocol);
+    testing.expectEqual('example.com', url.hostname);
+    testing.expectEqual('', url.port);
+    testing.expectEqual('http://example.com', url.origin);
+    testing.expectEqual('', url.username);
+    testing.expectEqual('', url.password);
+  }
+  {
+    const url = new URL('http://example.com?@bank.com');
+    testing.expectEqual('http:', url.protocol);
+    testing.expectEqual('example.com', url.hostname);
+    testing.expectEqual('', url.port);
+    testing.expectEqual('http://example.com', url.origin);
+    testing.expectEqual('', url.username);
+    testing.expectEqual('', url.password);
+  }
+  {
+    const url = new URL('http://example.com#@bank.com');
+    testing.expectEqual('http:', url.protocol);
+    testing.expectEqual('example.com', url.hostname);
+    testing.expectEqual('', url.port);
+    testing.expectEqual('http://example.com', url.origin);
+    testing.expectEqual('', url.username);
+    testing.expectEqual('', url.password);
+  }
+</script>

src/browser/tests/window/cross_origin.html

@@ -0,0 +1,51 @@
+<!DOCTYPE html>
+<script src="../testing.js"></script>
+
+<iframe src=support/frame1.html></iframe>
+
+<script id=post_message type=module>
+  const state = await testing.async();
+
+{
+  const ALT_BASE = testing.BASE_URL.replace('127.0.0.1', 'localhost');
+
+  {
+    let iframe2 = document.createElement('iframe');
+    iframe2.src = ALT_BASE + 'window/support/frame1.html';
+    document.documentElement.appendChild(iframe2);
+  }
+
+  {
+    let iframe3 = document.createElement('iframe');
+    iframe3.src = ALT_BASE + 'window/support/frame2.html';
+    document.documentElement.appendChild(iframe3);
+  }
+
+  let captures = [];
+  window.addEventListener('message', (e) => {
+    captures.push(e.data);
+    if (captures.length == 3) {
+      state.resolve();
+    }
+  });
+
+  await state.done(() => {
+    const expected_urls = [
+      testing.BASE_URL + 'window/support/frame1.html',
+      ALT_BASE + 'window/support/frame1.html',
+      ALT_BASE + 'window/support/frame2.html',
+    ];
+
+    // No strong order guarantee for messaages, and we don't care about the order
+    // so long as it's the correct data.
+    testing.expectEqual(expected_urls.sort(), captures.map((c) => {return c.url}).sort());
+    captures.forEach((c) => {
+      if (c.url.includes(testing.BASE_URL)) {
+        testing.expectEqual(false, c.document_is_undefined);
+      } else {
+        testing.expectEqual(true, c.document_is_undefined);
+      }
+    });
+  });
+}
+</script>

src/browser/tests/window/support/frame1.html

@@ -0,0 +1,7 @@
+<!DOCTYPE html>
+<script>
+  window.parent.postMessage({
+    url: location.toString(),
+    document_is_undefined: window.parent.document === undefined,
+  }, '*')
+</script>

src/browser/tests/window/support/frame2.html

@@ -0,0 +1,7 @@
+<!DOCTYPE html>
+<script>
+  window.top.postMessage({
+    url: location.toString(),
+    document_is_undefined: window.top.document === undefined,
+  }, '*')
+</script>

src/browser/tests/window/window.html

@@ -262,6 +262,31 @@
   }
 </script>
 
+<script id=cached_getter_wrong_this>
+  // Test that extracting a cached property getter and calling it with wrong `this`
+  // doesn't crash (V8 internal field out of bounds). V8's Signature validation
+  // should throw "Illegal invocation" for wrong receiver types.
+  const documentGetter = Object.getOwnPropertyDescriptor(Window.prototype, 'document').get;
+
+  // Verify we get an error with wrong this values
+  let errorCount = 0;
+  const testValues = [{}, null, undefined, 42, 'string', [], () => {}];
+  for (const val of testValues) {
+    try {
+      documentGetter.call(val);
+    } catch (e) {
+      if (e.message.includes('Illegal invocation')) {
+        errorCount++;
+      }
+    }
+  }
+  // At least some should throw (null/undefined/primitives get coerced in sloppy mode)
+  testing.expectEqual(true, errorCount > 0);
+
+  // Calling with correct this should still work
+  testing.expectEqual(document, documentGetter.call(window));
+</script>
+
 <script id=unhandled_rejection>
   {
     let unhandledCalled = 0;

src/browser/webapi/IntersectionObserver.zig

@@ -25,6 +25,8 @@ const Allocator = std.mem.Allocator;
 
 const Page = @import("../Page.zig");
 const Session = @import("../Session.zig");
+
+const Node = @import("Node.zig");
 const Element = @import("Element.zig");
 const DOMRect = @import("DOMRect.zig");
 
@@ -55,7 +57,7 @@ var zero_rect: DOMRect = .{
 };
 
 pub const ObserverInit = struct {
-    root: ?*Element = null,
+    root: ?*Node = null,
     rootMargin: ?[]const u8 = null,
     threshold: Threshold = .{ .scalar = 0.0 },
 
@@ -81,11 +83,25 @@ pub fn init(callback: js.Function.Temp, options: ?ObserverInit, page: *Page) !*I
         .array => |arr| try arena.dupe(f64, arr),
     };
 
+    const root: ?*Element = blk: {
+        const root_opt = opts.root orelse break :blk null;
+        switch (root_opt._type) {
+            .element => |el| break :blk el,
+            .document => {
+                // not strictly correct, `null` means the viewport, not the
+                // entire document, but since we don't render anything, this
+                // should be fine.
+                break :blk null;
+            },
+            else => return error.TypeError,
+        }
+    };
+
     const self = try arena.create(IntersectionObserver);
     self.* = .{
         ._arena = arena,
         ._callback = callback,
-        ._root = opts.root,
+        ._root = root,
         ._root_margin = root_margin,
         ._threshold = threshold,
     };

src/browser/webapi/Window.zig

@@ -49,6 +49,10 @@ const IS_DEBUG = builtin.mode == .Debug;
 
 const Allocator = std.mem.Allocator;
 
+pub fn registerTypes() []const type {
+    return &.{ Window, CrossOriginWindow };
+}
+
 const Window = @This();
 
 _proto: *EventTarget,
@@ -87,6 +91,8 @@ _scroll_pos: struct {
     .y = 0,
     .state = .done,
 },
+// A cross origin wrapper for this window
+_cross_origin_wrapper: CrossOriginWindow,
 
 pub fn asEventTarget(self: *Window) *EventTarget {
     return self._proto;
@@ -104,19 +110,19 @@ pub fn getWindow(self: *Window) *Window {
     return self;
 }
 
-pub fn getTop(self: *Window) *Window {
+pub fn getTop(self: *Window, page: *Page) Access {
     var p = self._page;
     while (p.parent) |parent| {
         p = parent;
     }
-    return p.window;
+    return Access.init(page.window, p.window);
 }
 
-pub fn getParent(self: *Window) *Window {
+pub fn getParent(self: *Window, page: *Page) Access {
     if (self._page.parent) |p| {
-        return p.window;
+        return Access.init(page.window, p.window);
     }
-    return self;
+    return .{ .window = self };
 }
 
 pub fn getDocument(self: *Window) *Document {
@@ -606,6 +612,25 @@ pub fn unhandledPromiseRejection(self: *Window, no_handler: bool, rejection: js.
     }
 }
 
+pub const Access = union(enum) {
+    window: *Window,
+    cross_origin: *CrossOriginWindow,
+
+    pub fn init(callee: *Window, accessing: *Window) Access {
+        if (callee == accessing) {
+            // common enough that it's worth the check
+            return .{ .window = accessing };
+        }
+
+        if (callee._page.js.origin == accessing._page.js.origin) {
+            // two different windows, but same origin, return the full window
+            return .{ .window = accessing };
+        }
+
+        return .{ .cross_origin = &accessing._cross_origin_wrapper };
+    }
+};
+
 const ScheduleOpts = struct {
     repeat: bool,
     params: []js.Value.Temp,
@@ -804,7 +829,7 @@ pub const JsApi = struct {
         pub var class_id: bridge.ClassId = undefined;
     };
 
-    pub const document = bridge.accessor(Window.getDocument, null, .{ .cache = .{ .internal = 1 } });
+    pub const document = bridge.accessor(Window.getDocument, null, .{ .cache = .{ .internal = 1 }, .deletable = false });
     pub const console = bridge.accessor(Window.getConsole, null, .{ .cache = .{ .internal = 2 } });
 
     pub const top = bridge.accessor(Window.getTop, null, .{});
@@ -817,7 +842,7 @@ pub const JsApi = struct {
     pub const performance = bridge.accessor(Window.getPerformance, null, .{});
     pub const localStorage = bridge.accessor(Window.getLocalStorage, null, .{});
     pub const sessionStorage = bridge.accessor(Window.getSessionStorage, null, .{});
-    pub const location = bridge.accessor(Window.getLocation, Window.setLocation, .{});
+    pub const location = bridge.accessor(Window.getLocation, Window.setLocation, .{ .deletable = false });
     pub const history = bridge.accessor(Window.getHistory, null, .{});
     pub const navigation = bridge.accessor(Window.getNavigation, null, .{});
     pub const crypto = bridge.accessor(Window.getCrypto, null, .{});
@@ -892,6 +917,41 @@ pub const JsApi = struct {
     }.prompt, .{});
 };
 
+const CrossOriginWindow = struct {
+    window: *Window,
+
+    pub fn postMessage(self: *CrossOriginWindow, message: js.Value.Temp, target_origin: ?[]const u8, page: *Page) !void {
+        return self.window.postMessage(message, target_origin, page);
+    }
+
+    pub fn getTop(self: *CrossOriginWindow, page: *Page) Access {
+        return self.window.getParent(page);
+    }
+
+    pub fn getParent(self: *CrossOriginWindow, page: *Page) Access {
+        return self.window.getParent(page);
+    }
+
+    pub fn getFramesLength(self: *const CrossOriginWindow) u32 {
+        return self.window.getFramesLength();
+    }
+
+    pub const JsApi = struct {
+        pub const bridge = js.Bridge(CrossOriginWindow);
+
+        pub const Meta = struct {
+            pub const name = "CrossOriginWindow";
+            pub const prototype_chain = bridge.prototypeChain();
+            pub var class_id: bridge.ClassId = undefined;
+        };
+
+        pub const postMessage = bridge.function(CrossOriginWindow.postMessage, .{});
+        pub const top = bridge.accessor(CrossOriginWindow.getTop, null, .{});
+        pub const parent = bridge.accessor(CrossOriginWindow.getParent, null, .{});
+        pub const length = bridge.accessor(CrossOriginWindow.getFramesLength, null, .{});
+    };
+};
+
 const testing = @import("../../testing.zig");
 test "WebApi: Window" {
     try testing.htmlRunner("window", .{});

src/browser/webapi/element/html/IFrame.zig

@@ -39,8 +39,9 @@ pub fn asNode(self: *IFrame) *Node {
     return self.asElement().asNode();
 }
 
-pub fn getContentWindow(self: *const IFrame) ?*Window {
+pub fn getContentWindow(self: *const IFrame, page: *Page) ?Window.Access {
-    return self._window;
+    const frame_window = self._window orelse return null;
+    return Window.Access.init(page.window, frame_window);
 }
 
 pub fn getContentDocument(self: *const IFrame) ?*Document {

src/cdp/CDP.zig

@@ -22,36 +22,36 @@ const lp = @import("lightpanda");
 const Allocator = std.mem.Allocator;
 const json = std.json;
 
-const log = @import("../log.zig");
+const Incrementing = @import("id.zig").Incrementing;
-const js = @import("../browser/js/js.zig");
 
+const log = @import("../log.zig");
 const App = @import("../App.zig");
+const Notification = @import("../Notification.zig");
+
+const Client = @import("../Server.zig").Client;
+
+const js = @import("../browser/js/js.zig");
 const Browser = @import("../browser/Browser.zig");
 const Session = @import("../browser/Session.zig");
-const HttpClient = @import("../browser/HttpClient.zig");
 const Page = @import("../browser/Page.zig");
-const Incrementing = @import("id.zig").Incrementing;
-const Notification = @import("../Notification.zig");
-const InterceptState = @import("domains/fetch.zig").InterceptState;
 const Mime = @import("../browser/Mime.zig");
+const HttpClient = @import("../browser/HttpClient.zig");
+
+const InterceptState = @import("domains/fetch.zig").InterceptState;
 
 pub const URL_BASE = "chrome://newtab/";
 
 const IS_DEBUG = @import("builtin").mode == .Debug;
 
-pub const CDP = CDPT(struct {
-    const Client = *@import("../Server.zig").Client;
-});
-
-const SessionIdGen = Incrementing(u32, "SID");
 const TargetIdGen = Incrementing(u32, "TID");
+const SessionIdGen = Incrementing(u32, "SID");
 const BrowserContextIdGen = Incrementing(u32, "BID");
 
 // Generic so that we can inject mocks into it.
-pub fn CDPT(comptime TypeProvider: type) type {
+const CDP = @This();
-    return struct {
+
 // Used for sending message to the client and closing on error
-        client: TypeProvider.Client,
+client: *Client,
 
 allocator: Allocator,
 
@@ -65,7 +65,7 @@ pub fn CDPT(comptime TypeProvider: type) type {
 session_id_gen: SessionIdGen = .{},
 browser_context_id_gen: BrowserContextIdGen = .{},
 
-        browser_context: ?BrowserContext(Self),
+browser_context: ?BrowserContext(CDP),
 
 // Re-used arena for processing a message. We're assuming that we're getting
 // 1 message at a time.
@@ -81,13 +81,12 @@ pub fn CDPT(comptime TypeProvider: type) type {
 // (or altogether elimiate) our use of this.
 browser_context_arena: std.heap.ArenaAllocator,
 
-        const Self = @This();
+pub fn init(client: *Client) !CDP {
-
+    const app = client.app;
-        pub fn init(app: *App, http_client: *HttpClient, client: TypeProvider.Client) !Self {
     const allocator = app.allocator;
     const browser = try Browser.init(app, .{
         .env = .{ .with_inspector = true },
-                .http_client = http_client,
+        .http_client = client.http,
     });
     errdefer browser.deinit();
 
@@ -103,7 +102,7 @@ pub fn CDPT(comptime TypeProvider: type) type {
     };
 }
 
-        pub fn deinit(self: *Self) void {
+pub fn deinit(self: *CDP) void {
     if (self.browser_context) |*bc| {
         bc.deinit();
     }
@@ -114,13 +113,13 @@ pub fn CDPT(comptime TypeProvider: type) type {
     self.browser_context_arena.deinit();
 }
 
-        pub fn handleMessage(self: *Self, msg: []const u8) bool {
+pub fn handleMessage(self: *CDP, msg: []const u8) bool {
     // if there's an error, it's already been logged
     self.processMessage(msg) catch return false;
     return true;
 }
 
-        pub fn processMessage(self: *Self, msg: []const u8) !void {
+pub fn processMessage(self: *CDP, msg: []const u8) !void {
     const arena = &self.message_arena;
     defer _ = arena.reset(.{ .retain_with_limit = 1024 * 16 });
     return self.dispatch(arena.allocator(), self, msg);
@@ -130,7 +129,7 @@ pub fn CDPT(comptime TypeProvider: type) type {
 // A bit hacky right now. The main server loop doesn't unblock for
 // scheduled task. So we run this directly in order to process any
 // timeouts (or http events) which are ready to be processed.
-        pub fn pageWait(self: *Self, ms: u32) !Session.Runner.CDPWaitResult {
+pub fn pageWait(self: *CDP, ms: u32) !Session.Runner.CDPWaitResult {
     const session = &(self.browser.session orelse return error.NoPage);
     var runner = try session.runner(.{});
     return runner.waitCDP(.{ .ms = ms });
@@ -139,12 +138,12 @@ pub fn CDPT(comptime TypeProvider: type) type {
 // Called from above, in processMessage which handles client messages
 // but can also be called internally. For example, Target.sendMessageToTarget
 // calls back into dispatch to capture the response.
-        pub fn dispatch(self: *Self, arena: Allocator, sender: anytype, str: []const u8) !void {
+pub fn dispatch(self: *CDP, arena: Allocator, sender: anytype, str: []const u8) !void {
     const input = json.parseFromSliceLeaky(InputMessage, arena, str, .{
         .ignore_unknown_fields = true,
     }) catch return error.InvalidJSON;
 
-            var command = Command(Self, @TypeOf(sender)){
+    var command = Command(CDP, @TypeOf(sender)){
         .input = .{
             .json = str,
             .id = input.id,
@@ -264,26 +263,26 @@ pub fn CDPT(comptime TypeProvider: type) type {
     return error.UnknownDomain;
 }
 
-        fn isValidSessionId(self: *const Self, input_session_id: []const u8) bool {
+fn isValidSessionId(self: *const CDP, input_session_id: []const u8) bool {
     const browser_context = &(self.browser_context orelse return false);
     const session_id = browser_context.session_id orelse return false;
     return std.mem.eql(u8, session_id, input_session_id);
 }
 
-        pub fn createBrowserContext(self: *Self) ![]const u8 {
+pub fn createBrowserContext(self: *CDP) ![]const u8 {
     if (self.browser_context != null) {
         return error.AlreadyExists;
     }
     const id = self.browser_context_id_gen.next();
 
-            self.browser_context = @as(BrowserContext(Self), undefined);
+    self.browser_context = @as(BrowserContext(CDP), undefined);
     const browser_context = &self.browser_context.?;
 
-            try BrowserContext(Self).init(browser_context, id, self);
+    try BrowserContext(CDP).init(browser_context, id, self);
     return id;
 }
 
-        pub fn disposeBrowserContext(self: *Self, browser_context_id: []const u8) bool {
+pub fn disposeBrowserContext(self: *CDP, browser_context_id: []const u8) bool {
     const bc = &(self.browser_context orelse return false);
     if (std.mem.eql(u8, bc.id, browser_context_id) == false) {
         return false;
@@ -297,7 +296,7 @@ pub fn CDPT(comptime TypeProvider: type) type {
 const SendEventOpts = struct {
     session_id: ?[]const u8 = null,
 };
-        pub fn sendEvent(self: *Self, method: []const u8, p: anytype, opts: SendEventOpts) !void {
+pub fn sendEvent(self: *CDP, method: []const u8, p: anytype, opts: SendEventOpts) !void {
     return self.sendJSON(.{
         .method = method,
         .params = if (comptime @typeInfo(@TypeOf(p)) == .null) struct {}{} else p,
@@ -305,13 +304,11 @@ pub fn CDPT(comptime TypeProvider: type) type {
     });
 }
 
-        pub fn sendJSON(self: *Self, message: anytype) !void {
+pub fn sendJSON(self: *CDP, message: anytype) !void {
     return self.client.sendJSON(message, .{
         .emit_null_optional_fields = false,
     });
 }
-    };
-}
 
 pub fn BrowserContext(comptime CDP_T: type) type {
     const Node = @import("Node.zig");
@@ -958,7 +955,7 @@ fn asUint(comptime T: type, comptime string: []const u8) T {
 
 const testing = @import("testing.zig");
 test "cdp: invalid json" {
-    var ctx = testing.context();
+    var ctx = try testing.context();
     defer ctx.deinit();
 
     try testing.expectError(error.InvalidJSON, ctx.processMessage("invalid"));
@@ -983,7 +980,7 @@ test "cdp: invalid json" {
 }
 
 test "cdp: invalid sessionId" {
-    var ctx = testing.context();
+    var ctx = try testing.context();
     defer ctx.deinit();
 
     {
@@ -1008,7 +1005,7 @@ test "cdp: invalid sessionId" {
 }
 
 test "cdp: STARTUP sessionId" {
-    var ctx = testing.context();
+    var ctx = try testing.context();
     defer ctx.deinit();
 
     {
@@ -1021,13 +1018,13 @@ test "cdp: STARTUP sessionId" {
         // we have a brower context but no session_id
         _ = try ctx.loadBrowserContext(.{});
         try ctx.processMessage(.{ .id = 3, .method = "Hi", .sessionId = "STARTUP" });
-        try ctx.expectSentResult(null, .{ .id = 3, .index = 0, .session_id = "STARTUP" });
+        try ctx.expectSentResult(null, .{ .id = 3, .index = 1, .session_id = "STARTUP" });
     }
 
     {
         // we have a brower context with a different session_id
         _ = try ctx.loadBrowserContext(.{ .session_id = "SESS-2" });
         try ctx.processMessage(.{ .id = 4, .method = "Hi", .sessionId = "STARTUP" });
-        try ctx.expectSentResult(null, .{ .id = 4, .index = 0, .session_id = "STARTUP" });
+        try ctx.expectSentResult(null, .{ .id = 4, .index = 2, .session_id = "STARTUP" });
     }
 }

src/cdp/domains/browser.zig

@@ -112,7 +112,7 @@ fn resetPermissions(cmd: anytype) !void {
 
 const testing = @import("../testing.zig");
 test "cdp.browser: getVersion" {
-    var ctx = testing.context();
+    var ctx = try testing.context();
     defer ctx.deinit();
 
     try ctx.processMessage(.{
@@ -131,7 +131,7 @@ test "cdp.browser: getVersion" {
 }
 
 test "cdp.browser: getWindowForTarget" {
-    var ctx = testing.context();
+    var ctx = try testing.context();
     defer ctx.deinit();
 
     try ctx.processMessage(.{

src/cdp/domains/dom.zig

@@ -547,7 +547,7 @@ fn requestNode(cmd: anytype) !void {
 
 const testing = @import("../testing.zig");
 test "cdp.dom: getSearchResults unknown search id" {
-    var ctx = testing.context();
+    var ctx = try testing.context();
     defer ctx.deinit();
 
     try ctx.processMessage(.{
@@ -559,7 +559,7 @@ test "cdp.dom: getSearchResults unknown search id" {
 }
 
 test "cdp.dom: search flow" {
-    var ctx = testing.context();
+    var ctx = try testing.context();
     defer ctx.deinit();
 
     _ = try ctx.loadBrowserContext(.{ .id = "BID-A", .url = "cdp/dom1.html" });
@@ -614,7 +614,7 @@ test "cdp.dom: search flow" {
 }
 
 test "cdp.dom: querySelector unknown search id" {
-    var ctx = testing.context();
+    var ctx = try testing.context();
     defer ctx.deinit();
 
     _ = try ctx.loadBrowserContext(.{ .id = "BID-A", .url = "cdp/dom1.html" });
@@ -635,7 +635,7 @@ test "cdp.dom: querySelector unknown search id" {
 }
 
 test "cdp.dom: querySelector Node not found" {
-    var ctx = testing.context();
+    var ctx = try testing.context();
     defer ctx.deinit();
 
     _ = try ctx.loadBrowserContext(.{ .id = "BID-A", .url = "cdp/dom1.html" });
@@ -663,7 +663,7 @@ test "cdp.dom: querySelector Node not found" {
 }
 
 test "cdp.dom: querySelector Nodes found" {
-    var ctx = testing.context();
+    var ctx = try testing.context();
     defer ctx.deinit();
 
     _ = try ctx.loadBrowserContext(.{ .id = "BID-A", .url = "cdp/dom2.html" });
@@ -693,7 +693,7 @@ test "cdp.dom: querySelector Nodes found" {
 }
 
 test "cdp.dom: getBoxModel" {
-    var ctx = testing.context();
+    var ctx = try testing.context();
     defer ctx.deinit();
 
     _ = try ctx.loadBrowserContext(.{ .id = "BID-A", .url = "cdp/dom2.html" });

src/cdp/domains/lp.zig

@@ -279,7 +279,7 @@ fn waitForSelector(cmd: anytype) !void {
 
 const testing = @import("../testing.zig");
 test "cdp.lp: getMarkdown" {
-    var ctx = testing.context();
+    var ctx = try testing.context();
     defer ctx.deinit();
 
     const bc = try ctx.loadBrowserContext(.{});
@@ -290,12 +290,12 @@ test "cdp.lp: getMarkdown" {
         .method = "LP.getMarkdown",
     });
 
-    const result = ctx.client.?.sent.items[0].object.get("result").?.object;
+    const result = (try ctx.getSentMessage(0)).?.object.get("result").?.object;
     try testing.expect(result.get("markdown") != null);
 }
 
 test "cdp.lp: getInteractiveElements" {
-    var ctx = testing.context();
+    var ctx = try testing.context();
     defer ctx.deinit();
 
     const bc = try ctx.loadBrowserContext(.{});
@@ -306,13 +306,13 @@ test "cdp.lp: getInteractiveElements" {
         .method = "LP.getInteractiveElements",
     });
 
-    const result = ctx.client.?.sent.items[0].object.get("result").?.object;
+    const result = (try ctx.getSentMessage(0)).?.object.get("result").?.object;
     try testing.expect(result.get("elements") != null);
     try testing.expect(result.get("nodeIds") != null);
 }
 
 test "cdp.lp: getStructuredData" {
-    var ctx = testing.context();
+    var ctx = try testing.context();
     defer ctx.deinit();
 
     const bc = try ctx.loadBrowserContext(.{});
@@ -323,12 +323,12 @@ test "cdp.lp: getStructuredData" {
         .method = "LP.getStructuredData",
     });
 
-    const result = ctx.client.?.sent.items[0].object.get("result").?.object;
+    const result = (try ctx.getSentMessage(0)).?.object.get("result").?.object;
     try testing.expect(result.get("structuredData") != null);
 }
 
 test "cdp.lp: action tools" {
-    var ctx = testing.context();
+    var ctx = try testing.context();
     defer ctx.deinit();
 
     const bc = try ctx.loadBrowserContext(.{});
@@ -389,7 +389,7 @@ test "cdp.lp: action tools" {
 }
 
 test "cdp.lp: waitForSelector" {
-    var ctx = testing.context();
+    var ctx = try testing.context();
     defer ctx.deinit();
 
     const bc = try ctx.loadBrowserContext(.{});
@@ -405,9 +405,8 @@ test "cdp.lp: waitForSelector" {
         .method = "LP.waitForSelector",
         .params = .{ .selector = "#existing", .timeout = 2000 },
     });
-    var result = ctx.client.?.sent.items[0].object.get("result").?.object;
+    var result = (try ctx.getSentMessage(0)).?.object.get("result").?.object;
     try testing.expect(result.get("backendNodeId") != null);
-    ctx.client.?.sent.clearRetainingCapacity();
 
     // 2. Delayed element
     try ctx.processMessage(.{
@@ -415,9 +414,8 @@ test "cdp.lp: waitForSelector" {
         .method = "LP.waitForSelector",
         .params = .{ .selector = "#delayed", .timeout = 5000 },
     });
-    result = ctx.client.?.sent.items[0].object.get("result").?.object;
+    result = (try ctx.getSentMessage(1)).?.object.get("result").?.object;
     try testing.expect(result.get("backendNodeId") != null);
-    ctx.client.?.sent.clearRetainingCapacity();
 
     // 3. Timeout error
     try ctx.processMessage(.{
@@ -425,6 +423,6 @@ test "cdp.lp: waitForSelector" {
         .method = "LP.waitForSelector",
         .params = .{ .selector = "#nonexistent", .timeout = 100 },
     });
-    const err_obj = ctx.client.?.sent.items[0].object.get("error").?.object;
+    const err_obj = (try ctx.getSentMessage(2)).?.object.get("error").?.object;
     try testing.expect(err_obj.get("code") != null);
 }

src/cdp/domains/network.zig

@@ -439,7 +439,7 @@ fn idFromRequestId(request_id: []const u8) !u64 {
 
 const testing = @import("../testing.zig");
 test "cdp.network setExtraHTTPHeaders" {
-    var ctx = testing.context();
+    var ctx = try testing.context();
     defer ctx.deinit();
 
     _ = try ctx.loadBrowserContext(.{ .id = "NID-A", .session_id = "NESI-A" });
@@ -465,7 +465,7 @@ test "cdp.Network: cookies" {
     const ResCookie = CdpStorage.ResCookie;
     const CdpCookie = CdpStorage.CdpCookie;
 
-    var ctx = testing.context();
+    var ctx = try testing.context();
     defer ctx.deinit();
     _ = try ctx.loadBrowserContext(.{ .id = "BID-S" });
 

src/cdp/domains/page.zig

@@ -39,6 +39,7 @@ pub fn processMessage(cmd: anytype) !void {
         addScriptToEvaluateOnNewDocument,
         createIsolatedWorld,
         navigate,
+        reload,
         stopLoading,
         close,
         captureScreenshot,
@@ -52,6 +53,7 @@ pub fn processMessage(cmd: anytype) !void {
         .addScriptToEvaluateOnNewDocument => return addScriptToEvaluateOnNewDocument(cmd),
         .createIsolatedWorld => return createIsolatedWorld(cmd),
         .navigate => return navigate(cmd),
+        .reload => return doReload(cmd),
         .stopLoading => return cmd.sendResult(null, .{}),
         .close => return close(cmd),
         .captureScreenshot => return captureScreenshot(cmd),
@@ -82,7 +84,7 @@ fn getFrameTree(cmd: anytype) !void {
             .frame = .{
                 .id = "TID-STARTUP",
                 .loaderId = "LID-STARTUP",
-                .securityOrigin = @import("../cdp.zig").URL_BASE,
+                .securityOrigin = @import("../CDP.zig").URL_BASE,
                 .url = "about:blank",
                 .secureContextType = "Secure",
             },
@@ -252,6 +254,36 @@ fn navigate(cmd: anytype) !void {
     });
 }
 
+fn doReload(cmd: anytype) !void {
+    const params = try cmd.params(struct {
+        ignoreCache: ?bool = null,
+        scriptToEvaluateOnLoad: ?[]const u8 = null,
+    });
+
+    const bc = cmd.browser_context orelse return error.BrowserContextNotLoaded;
+
+    if (bc.session_id == null) {
+        return error.SessionIdNotLoaded;
+    }
+
+    const session = bc.session;
+    var page = session.currentPage() orelse return error.PageNotLoaded;
+
+    // Dupe URL before replacePage() frees the old page's arena.
+    const reload_url = try cmd.arena.dupeZ(u8, page.url);
+
+    if (page._load_state != .waiting) {
+        page = try session.replacePage();
+    }
+
+    try page.navigate(reload_url, .{
+        .reason = .address_bar,
+        .cdp_id = cmd.input.id,
+        .kind = .reload,
+        .force = if (params) |p| p.ignoreCache orelse false else false,
+    });
+}
+
 pub fn pageNavigate(bc: anytype, event: *const Notification.PageNavigate) !void {
     // detachTarget could be called, in which case, we still have a page doing
     // things, but no session.
@@ -642,7 +674,7 @@ fn getLayoutMetrics(cmd: anytype) !void {
 
 const testing = @import("../testing.zig");
 test "cdp.page: getFrameTree" {
-    var ctx = testing.context();
+    var ctx = try testing.context();
     defer ctx.deinit();
 
     {
@@ -712,7 +744,7 @@ test "cdp.page: captureScreenshot" {
     const filter: LogFilter = .init(&.{.not_implemented});
     defer filter.deinit();
 
-    var ctx = testing.context();
+    var ctx = try testing.context();
     defer ctx.deinit();
     {
         try ctx.processMessage(.{ .id = 10, .method = "Page.captureScreenshot", .params = .{ .format = "jpg" } });
@@ -728,7 +760,7 @@ test "cdp.page: captureScreenshot" {
 }
 
 test "cdp.page: getLayoutMetrics" {
-    var ctx = testing.context();
+    var ctx = try testing.context();
     defer ctx.deinit();
 
     _ = try ctx.loadBrowserContext(.{ .id = "BID-9", .url = "hi.html", .target_id = "FID-000000000X".* });
@@ -784,3 +816,27 @@ test "cdp.page: getLayoutMetrics" {
         },
     }, .{ .id = 12 });
 }
+
+test "cdp.page: reload" {
+    var ctx = try testing.context();
+    defer ctx.deinit();
+
+    {
+        // reload without browser context — should error
+        try ctx.processMessage(.{ .id = 30, .method = "Page.reload" });
+        try ctx.expectSentError(-31998, "BrowserContextNotLoaded", .{ .id = 30 });
+    }
+
+    _ = try ctx.loadBrowserContext(.{ .id = "BID-9", .url = "hi.html", .target_id = "FID-000000000X".* });
+
+    {
+        // reload with no params — should not error (navigation is async,
+        // so no result is sent synchronously; we just verify no error)
+        try ctx.processMessage(.{ .id = 31, .method = "Page.reload" });
+    }
+
+    {
+        // reload with ignoreCache param
+        try ctx.processMessage(.{ .id = 32, .method = "Page.reload", .params = .{ .ignoreCache = true } });
+    }
+}

src/cdp/domains/security.zig

@@ -44,7 +44,7 @@ fn setIgnoreCertificateErrors(cmd: anytype) !void {
 const testing = @import("../testing.zig");
 
 test "cdp.Security: setIgnoreCertificateErrors" {
-    var ctx = testing.context();
+    var ctx = try testing.context();
     defer ctx.deinit();
 
     _ = try ctx.loadBrowserContext(.{ .id = "BID-9" });

src/cdp/domains/storage.zig

@@ -243,7 +243,7 @@ pub fn writeCookie(cookie: *const Cookie, w: anytype) !void {
 const testing = @import("../testing.zig");
 
 test "cdp.Storage: cookies" {
-    var ctx = testing.context();
+    var ctx = try testing.context();
     defer ctx.deinit();
     _ = try ctx.loadBrowserContext(.{ .id = "BID-S" });
 

src/cdp/domains/target.zig

@@ -512,7 +512,7 @@ const TargetInfo = struct {
 
 const testing = @import("../testing.zig");
 test "cdp.target: getBrowserContexts" {
-    var ctx = testing.context();
+    var ctx = try testing.context();
     defer ctx.deinit();
 
     // {
@@ -536,7 +536,7 @@ test "cdp.target: getBrowserContexts" {
 }
 
 test "cdp.target: createBrowserContext" {
-    var ctx = testing.context();
+    var ctx = try testing.context();
     defer ctx.deinit();
 
     {
@@ -554,7 +554,7 @@ test "cdp.target: createBrowserContext" {
 }
 
 test "cdp.target: disposeBrowserContext" {
-    var ctx = testing.context();
+    var ctx = try testing.context();
     defer ctx.deinit();
 
     {
@@ -585,7 +585,7 @@ test "cdp.target: disposeBrowserContext" {
 
 test "cdp.target: createTarget" {
     {
-        var ctx = testing.context();
+        var ctx = try testing.context();
         defer ctx.deinit();
         try ctx.processMessage(.{ .id = 10, .method = "Target.createTarget", .params = .{ .url = "about:blank" } });
 
@@ -595,7 +595,7 @@ test "cdp.target: createTarget" {
     }
 
     {
-        var ctx = testing.context();
+        var ctx = try testing.context();
         defer ctx.deinit();
         // active auto attach to get the Target.attachedToTarget event.
         try ctx.processMessage(.{ .id = 9, .method = "Target.setAutoAttach", .params = .{ .autoAttach = true, .waitForDebuggerOnStart = false } });
@@ -607,7 +607,7 @@ test "cdp.target: createTarget" {
         try ctx.expectSentEvent("Target.attachedToTarget", .{ .sessionId = bc.session_id.?, .targetInfo = .{ .url = "about:blank", .title = "", .attached = true, .type = "page", .canAccessOpener = false, .browserContextId = bc.id, .targetId = bc.target_id.? } }, .{});
     }
 
-    var ctx = testing.context();
+    var ctx = try testing.context();
     defer ctx.deinit();
     const bc = try ctx.loadBrowserContext(.{ .id = "BID-9" });
     {
@@ -624,7 +624,7 @@ test "cdp.target: createTarget" {
 }
 
 test "cdp.target: closeTarget" {
-    var ctx = testing.context();
+    var ctx = try testing.context();
     defer ctx.deinit();
 
     {
@@ -655,7 +655,7 @@ test "cdp.target: closeTarget" {
 }
 
 test "cdp.target: attachToTarget" {
-    var ctx = testing.context();
+    var ctx = try testing.context();
     defer ctx.deinit();
 
     {
@@ -686,7 +686,7 @@ test "cdp.target: attachToTarget" {
 }
 
 test "cdp.target: getTargetInfo" {
-    var ctx = testing.context();
+    var ctx = try testing.context();
     defer ctx.deinit();
 
     {
@@ -737,7 +737,7 @@ test "cdp.target: getTargetInfo" {
 }
 
 test "cdp.target: issue#474: attach to just created target" {
-    var ctx = testing.context();
+    var ctx = try testing.context();
     defer ctx.deinit();
     const bc = try ctx.loadBrowserContext(.{ .id = "BID-9" });
     {
@@ -752,7 +752,7 @@ test "cdp.target: issue#474: attach to just created target" {
 }
 
 test "cdp.target: detachFromTarget" {
-    var ctx = testing.context();
+    var ctx = try testing.context();
     defer ctx.deinit();
     const bc = try ctx.loadBrowserContext(.{ .id = "BID-9" });
     {
@@ -775,19 +775,19 @@ test "cdp.target: detachFromTarget" {
 }
 
 test "cdp.target: detachFromTarget without session" {
-    var ctx = testing.context();
+    var ctx = try testing.context();
     defer ctx.deinit();
     _ = try ctx.loadBrowserContext(.{ .id = "BID-9" });
     {
         // detach when no session is attached should not send event
         try ctx.processMessage(.{ .id = 10, .method = "Target.detachFromTarget" });
         try ctx.expectSentResult(null, .{ .id = 10 });
-        try ctx.expectSentCount(0);
+        try ctx.expectSentCount(1);
     }
 }
 
 test "cdp.target: setAutoAttach false sends detachedFromTarget" {
-    var ctx = testing.context();
+    var ctx = try testing.context();
     defer ctx.deinit();
     const bc = try ctx.loadBrowserContext(.{ .id = "BID-9" });
     {

src/cdp/testing.zig

@@ -18,12 +18,14 @@
 
 const std = @import("std");
 const json = std.json;
+const posix = std.posix;
 const Allocator = std.mem.Allocator;
 const ArenaAllocator = std.heap.ArenaAllocator;
 
 const Testing = @This();
 
-const main = @import("cdp.zig");
+const CDP = @import("CDP.zig");
+const Server = @import("../Server.zig");
 
 const base = @import("../testing.zig");
 pub const allocator = base.allocator;
@@ -35,61 +37,27 @@ pub const expectEqualSlices = base.expectEqualSlices;
 pub const pageTest = base.pageTest;
 pub const newString = base.newString;
 
-const Client = struct {
-    allocator: Allocator,
-    send_arena: ArenaAllocator,
-    sent: std.ArrayList(json.Value) = .{},
-    serialized: std.ArrayList([]const u8) = .{},
-
-    fn init(alloc: Allocator) Client {
-        return .{
-            .allocator = alloc,
-            .send_arena = ArenaAllocator.init(alloc),
-        };
-    }
-
-    pub fn sendAllocator(self: *Client) Allocator {
-        return self.send_arena.allocator();
-    }
-
-    pub fn sendJSON(self: *Client, message: anytype, opts: json.Stringify.Options) !void {
-        var opts_copy = opts;
-        opts_copy.whitespace = .indent_2;
-        const serialized = try json.Stringify.valueAlloc(self.allocator, message, opts_copy);
-        try self.serialized.append(self.allocator, serialized);
-
-        const value = try json.parseFromSliceLeaky(json.Value, self.allocator, serialized, .{});
-        try self.sent.append(self.allocator, value);
-    }
-
-    pub fn sendJSONRaw(self: *Client, buf: std.ArrayList(u8)) !void {
-        const value = try json.parseFromSliceLeaky(json.Value, self.allocator, buf.items, .{});
-        try self.sent.append(self.allocator, value);
-    }
-};
-
-const TestCDP = main.CDPT(struct {
-    pub const Client = *Testing.Client;
-});
-
 const TestContext = struct {
-    client: ?Client = null,
+    read_at: usize = 0,
-    cdp_: ?TestCDP = null,
+    read_buf: [1024 * 32]u8 = undefined,
-    arena: ArenaAllocator,
+    cdp_: ?CDP = null,
+    client: Server.Client,
+    socket: posix.socket_t,
+    received: std.ArrayList(json.Value) = .empty,
+    received_raw: std.ArrayList([]const u8) = .empty,
 
     pub fn deinit(self: *TestContext) void {
         if (self.cdp_) |*c| {
             c.deinit();
         }
-        self.arena.deinit();
+        self.client.deinit();
+        posix.close(self.socket);
+        base.reset();
     }
 
-    pub fn cdp(self: *TestContext) *TestCDP {
+    pub fn cdp(self: *TestContext) *CDP {
         if (self.cdp_ == null) {
-            self.client = Client.init(self.arena.allocator());
+            self.cdp_ = CDP.init(&self.client) catch |err| @panic(@errorName(err));
-            // Don't use the arena here. We want to detect leaks in CDP.
-            // The arena is only for test-specific stuff
-            self.cdp_ = TestCDP.init(base.test_app, base.test_http, &self.client.?) catch unreachable;
         }
         return &self.cdp_.?;
     }
@@ -100,7 +68,7 @@ const TestContext = struct {
         session_id: ?[]const u8 = null,
         url: ?[:0]const u8 = null,
     };
-    pub fn loadBrowserContext(self: *TestContext, opts: BrowserContextOpts) !*main.BrowserContext(TestCDP) {
+    pub fn loadBrowserContext(self: *TestContext, opts: BrowserContextOpts) !*CDP.BrowserContext(CDP) {
         var c = self.cdp();
         if (c.browser_context) |bc| {
             _ = c.disposeBrowserContext(bc.id);
@@ -130,7 +98,7 @@ const TestContext = struct {
             }
             const page = try bc.session.createPage();
             const full_url = try std.fmt.allocPrintSentinel(
-                self.arena.allocator(),
+                base.arena_allocator,
                 "http://127.0.0.1:9582/src/browser/tests/{s}",
                 .{url},
                 0,
@@ -143,19 +111,20 @@ const TestContext = struct {
     }
 
     pub fn processMessage(self: *TestContext, msg: anytype) !void {
-        var json_message: []const u8 = undefined;
+        const json_message: []const u8 = blk: {
             if (@typeInfo(@TypeOf(msg)) != .pointer) {
-            json_message = try std.json.Stringify.valueAlloc(self.arena.allocator(), msg, .{});
+                break :blk try std.json.Stringify.valueAlloc(base.arena_allocator, msg, .{});
-        } else {
+            }
             // assume this is a string we want to send as-is, if it isn't, we'll
             // get a compile error, so no big deal.
-            json_message = msg;
+            break :blk msg;
-        }
+        };
         return self.cdp().processMessage(json_message);
     }
 
     pub fn expectSentCount(self: *TestContext, expected: usize) !void {
-        try expectEqual(expected, self.client.?.sent.items.len);
+        try self.read();
+        try expectEqual(expected, self.received.items.len);
     }
 
     const ExpectResultOpts = struct {
@@ -203,37 +172,135 @@ const TestContext = struct {
         index: ?usize = null,
     };
     pub fn expectSent(self: *TestContext, expected: anytype, opts: SentOpts) !void {
-        const serialized = try json.Stringify.valueAlloc(self.arena.allocator(), expected, .{
+        const serialized = try json.Stringify.valueAlloc(base.arena_allocator, expected, .{
             .whitespace = .indent_2,
             .emit_null_optional_fields = false,
         });
-
+        for (0..5) |_| {
-        for (self.client.?.sent.items, 0..) |sent, i| {
+            for (self.received.items, 0..) |received, i| {
-            if (try compareExpectedToSent(serialized, sent) == false) {
+                if (try compareExpectedToSent(serialized, received) == false) {
                     continue;
                 }
 
                 if (opts.index) |expected_index| {
                     if (expected_index != i) {
+                        std.debug.print("Expected message at index: {d}, was at index: {d}\n", .{ expected_index, i });
+                        self.dumpReceived();
                         return error.ErrorAtWrongIndex;
                     }
                 }
-            _ = self.client.?.sent.orderedRemove(i);
+                return;
-            _ = self.client.?.serialized.orderedRemove(i);
+            }
+            std.Thread.sleep(5 * std.time.ns_per_ms);
+            try self.read();
+        }
+        self.dumpReceived();
+        return error.ErrorNotFound;
+    }
+
+    fn dumpReceived(self: *const TestContext) void {
+        std.debug.print("CDP Message Received ({d})\n", .{self.received_raw.items.len});
+        for (self.received_raw.items, 0..) |received, i| {
+            std.debug.print("===Message: {d}===\n{s}\n\n", .{ i, received });
+        }
+    }
+
+    pub fn getSentMessage(self: *TestContext, index: usize) !?json.Value {
+        for (0..5) |_| {
+            if (index < self.received.items.len) {
+                return self.received.items[index];
+            }
+            std.Thread.sleep(5 * std.time.ns_per_ms);
+            try self.read();
+        }
+        return null;
+    }
+
+    fn read(self: *TestContext) !void {
+        while (true) {
+            const n = posix.read(self.socket, self.read_buf[self.read_at..]) catch |err| switch (err) {
+                error.WouldBlock => return,
+                else => return err,
+            };
+
+            if (n == 0) {
                 return;
             }
 
-        std.debug.print("Error not found. Expecting:\n{s}\n\nGot:\n", .{serialized});
+            self.read_at += n;
-        for (self.client.?.serialized.items, 0..) |sent, i| {
+
-            std.debug.print("#{d}\n{s}\n\n", .{ i, sent });
+            // Try to parse complete WebSocket frames
+            var pos: usize = 0;
+            while (pos < self.read_at) {
+                // Need at least 2 bytes for header
+                if (self.read_at - pos < 2) break;
+
+                const opcode = self.read_buf[pos] & 0x0F;
+                const payload_len_byte = self.read_buf[pos + 1] & 0x7F;
+
+                var header_size: usize = 2;
+                var payload_len: usize = payload_len_byte;
+
+                if (payload_len_byte == 126) {
+                    if (self.read_at - pos < 4) break;
+                    payload_len = std.mem.readInt(u16, self.read_buf[pos + 2 ..][0..2], .big);
+                    header_size = 4;
+                }
+                // Skip 8-byte length case (127) - not needed
+
+                const frame_size = header_size + payload_len;
+                if (self.read_at - pos < frame_size) break;
+
+                // We have a complete frame - process text (1) or binary (2), skip others
+                if (opcode == 1 or opcode == 2) {
+                    const payload = self.read_buf[pos + header_size ..][0..payload_len];
+                    const parsed = try std.json.parseFromSliceLeaky(json.Value, base.arena_allocator, payload, .{});
+                    try self.received.append(base.arena_allocator, parsed);
+                    try self.received_raw.append(base.arena_allocator, try base.arena_allocator.dupe(u8, payload));
+                }
+
+                pos += frame_size;
+            }
+
+            // Move remaining partial data to beginning of buffer
+            if (pos > 0 and pos < self.read_at) {
+                std.mem.copyForwards(u8, &self.read_buf, self.read_buf[pos..self.read_at]);
+                self.read_at -= pos;
+            } else if (pos == self.read_at) {
+                self.read_at = 0;
+            }
         }
-        return error.ErrorNotFound;
     }
 };
 
-pub fn context() TestContext {
+pub fn context() !TestContext {
+    var pair: [2]posix.socket_t = undefined;
+    const rc = std.c.socketpair(posix.AF.LOCAL, posix.SOCK.STREAM, 0, &pair);
+    if (rc != 0) {
+        return error.SocketPairFailed;
+    }
+
+    errdefer {
+        posix.close(pair[0]);
+        posix.close(pair[1]);
+    }
+
+    const timeout = std.mem.toBytes(posix.timeval{ .sec = 0, .usec = 5_000 });
+    try posix.setsockopt(pair[0], posix.SOL.SOCKET, posix.SO.RCVTIMEO, &timeout);
+    try posix.setsockopt(pair[0], posix.SOL.SOCKET, posix.SO.SNDTIMEO, &timeout);
+    try posix.setsockopt(pair[1], posix.SOL.SOCKET, posix.SO.RCVTIMEO, &timeout);
+    try posix.setsockopt(pair[1], posix.SOL.SOCKET, posix.SO.SNDTIMEO, &timeout);
+
+    try posix.setsockopt(pair[0], posix.SOL.SOCKET, posix.SO.RCVBUF, &std.mem.toBytes(@as(c_int, 32_768)));
+    try posix.setsockopt(pair[0], posix.SOL.SOCKET, posix.SO.SNDBUF, &std.mem.toBytes(@as(c_int, 32_768)));
+    try posix.setsockopt(pair[1], posix.SOL.SOCKET, posix.SO.RCVBUF, &std.mem.toBytes(@as(c_int, 32_768)));
+    try posix.setsockopt(pair[1], posix.SOL.SOCKET, posix.SO.SNDBUF, &std.mem.toBytes(@as(c_int, 32_768)));
+
+    const client = try Server.Client.init(pair[1], base.arena_allocator, base.test_app, "json-version", 2000);
+
     return .{
-        .arena = ArenaAllocator.init(std.testing.allocator),
+        .client = client,
+        .socket = pair[0],
     };
 }
 

src/network/websocket.zig

@@ -324,7 +324,9 @@ pub const WsConnection = struct {
     pub fn init(socket: posix.socket_t, allocator: Allocator, json_version_response: []const u8, timeout_ms: u32) !WsConnection {
         const socket_flags = try posix.fcntl(socket, posix.F.GETFL, 0);
         const nonblocking = @as(u32, @bitCast(posix.O{ .NONBLOCK = true }));
+        if (builtin.is_test == false) {
             assert(socket_flags & nonblocking == nonblocking, "WsConnection.init blocking", .{});
+        }
 
         var reader = try Reader(true).init(allocator);
         errdefer reader.deinit();

src/testing.zig

@@ -410,21 +410,46 @@ fn runWebApiTest(test_file: [:0]const u8) !void {
     page.js.localScope(&ls);
     defer ls.deinit();
 
+    {
         var try_catch: js.TryCatch = undefined;
         try_catch.init(&ls.local);
         defer try_catch.deinit();
 
         try page.navigate(url, .{});
+    }
+
     var runner = try test_session.runner(.{});
     try runner.wait(.{ .ms = 2000 });
 
-    test_browser.runMicrotasks();
+    var wait_ms: u32 = 2000;
+    var timer = try std.time.Timer.start();
+    while (true) {
+        var try_catch: js.TryCatch = undefined;
+        try_catch.init(&ls.local);
+        defer try_catch.deinit();
 
-    ls.local.eval("testing.assertOk()", "testing.assertOk()") catch |err| {
+        const js_val = ls.local.exec("testing.assertOk()", "testing.assertOk()") catch |err| {
             const caught = try_catch.caughtOrError(arena_allocator, err);
             std.debug.print("{s}: test failure\nError: {f}\n", .{ test_file, caught });
             return err;
         };
+        if (js_val.isTrue()) {
+            return;
+        }
+        switch (try runner.tick(.{ .ms = 20 })) {
+            .done => return error.TestNeverSignaledCompletion,
+            .ok => |next_ms| {
+                const ms_elapsed = timer.lap() / 1_000_000;
+                if (ms_elapsed >= wait_ms) {
+                    return error.TestTimedOut;
+                }
+                wait_ms -= @intCast(ms_elapsed);
+                if (next_ms > 0) {
+                    std.Thread.sleep(std.time.ns_per_ms * next_ms);
+                }
+            },
+        }
+    }
 }
 
 // Used by a few CDP tests - wouldn't be sad to see this go.
@@ -445,10 +470,6 @@ pub fn pageTest(comptime test_file: []const u8) !*Page {
     return page;
 }
 
-test {
-    std.testing.refAllDecls(@This());
-}
-
 const log = @import("log.zig");
 const TestHTTPServer = @import("TestHTTPServer.zig");