add history tests

src/testing.zig

@@ -404,6 +404,13 @@ pub fn htmlRunner(file: []const u8) !void {
     try page.navigate(url, .{});
     _ = page.wait(2000);
 
+    const needs_second_wait = try js_context.exec("testing._onPageWait.length > 0", "check_onPageWait");
+    if (needs_second_wait.value.toBool(page.main_context.isolate)) {
+        // sets the isSecondWait flag in testing.
+        _ = js_context.exec("testing._isSecondWait = true", "set_second_wait_flag") catch {};
+        _ = page.wait(2000);
+    }
+
     @import("root").js_runner_duration += std.time.Instant.since(try std.time.Instant.now(), start);
 
     const value = js_context.exec("testing.getStatus()", "testing.getStatus()") catch |err| {

src/tests/html/history.html

@@ -2,30 +2,30 @@
 <script src="../testing.js"></script>
 
 <script id=history>
-  testing.expectEqual('auto', history.scrollRestoration);
+    testing.expectEqual('auto', history.scrollRestoration);
 
-  history.scrollRestoration = 'manual';
-  history.scrollRestoration = 'foo';
-  testing.expectEqual('manual', history.scrollRestoration);
+    history.scrollRestoration = 'manual';
+    history.scrollRestoration = 'foo';
+    testing.expectEqual('manual', history.scrollRestoration);
 
-  history.scrollRestoration = 'auto';
-  testing.expectEqual('auto', history.scrollRestoration);
+    history.scrollRestoration = 'auto';
+    testing.expectEqual('auto', history.scrollRestoration);
+    testing.expectEqual(null, history.state)
 
-  testing.expectEqual(null, history.state)
+    history.pushState({ testInProgress: true }, null, 'http://127.0.0.1:9582/xhr/json');
+    testing.expectEqual({ testInProgress: true }, history.state);
 
-  history.pushState({}, null, '');
-  history.replaceState({}, null, '');
+    history.replaceState({ "new": "field", testComplete: true }, null);
+    let state = { "new": "field", testComplete: true };
+    testing.expectEqual(state, history.state);
 
-  testing.expectEqual(undefined, history.go());
-  testing.expectEqual(undefined, history.go(1));
-  testing.expectEqual(undefined, history.go(-1));
-  testing.expectEqual(undefined, history.forward());
-  testing.expectEqual(undefined, history.back());
-</script>
-
-<script id=history-states>
-  testing.expectEqual(null, history.state)
-
-  history.pushState({}, { "abc": "def" }, '');
-  testing.expectEqual({ "abc": "def"}, history.state);
+    testing.expectEqual(undefined, history.back());
+    testing.expectEqual(undefined, history.forward());
+
+    testing.onPageWait(() => {
+      testing.expectEqual(true, history.state && history.state.testComplete);
+      testing.expectEqual(state, history.state);
+    });
+
+    testing.expectEqual(undefined, history.go());
 </script>

src/tests/testing.js

@@ -50,6 +50,15 @@
   function getStatus() {
     // if we're already in a fail state, return fail, nothing can recover this
     if (testing._status === 'fail') return 'fail';
+
+    if (testing._isSecondWait) {
+      for (const pw of (testing._onPageWait)) {
+        testing._captured = pw[1];
+        pw[0]();
+        testing._captured = null;
+      }
+    }
+
     // run any eventually's that we've captured
     for (const ev of testing._eventually) {
       testing._captured = ev[1];
@@ -92,6 +101,18 @@
     _registerErrorCallback();
   }
 
+  // Set expectations to happen on the next time that `page.wait` is executed.
+  //
+  // History specifically uses this as it queues navigation that needs to be checked
+  // when the next page is loaded.
+  function onPageWait(fn) {
+    // Store callbacks to run when page.wait() happens
+    testing._onPageWait.push([fn, {
+      script_id: document.currentScript.id,
+      stack: new Error().stack,
+    }]);
+  }
+
   async function async(promise, cb) {
     const script_id = document.currentScript ? document.currentScript.id : '<script id is unavailable in browsers>';
     const stack = new Error().stack;
@@ -171,12 +192,15 @@
   window.testing = {
     _status: 'empty',
     _eventually: [],
+    _onPageWait: [],
     _executed_scripts: new Set(),
     _captured: null,
+    _isSecondWait: false,
     skip: skip,
     async: async,
     getStatus: getStatus,
     eventually: eventually,
+    onPageWait: onPageWait,
     expectEqual: expectEqual,
     expectError: expectError,
     withError: withError,