text: add wholeText getter

Signed-off-by: Francis Bouvier <francis.bouvier@gmail.com>

src/dom/text.zig

@@ -1,3 +1,9 @@
+const std = @import("std");
+
+const jsruntime = @import("jsruntime");
+const Case = jsruntime.test_utils.Case;
+const checkCases = jsruntime.test_utils.checkCases;
+
 const parser = @import("../netsurf.zig");
 
 const CharacterData = @import("character_data.zig").CharacterData;
@@ -6,4 +12,28 @@ pub const Text = struct {
     pub const Self = parser.Text;
     pub const prototype = *CharacterData;
     pub const mem_guarantied = true;
+
+    // JS funcs
+    // --------
+
+    // Read attributes
+
+    pub fn get_wholeText(self: *parser.Text) []const u8 {
+        return parser.textWholdeText(self);
+    }
 };
+
+// Tests
+// -----
+
+pub fn testExecFn(
+    _: std.mem.Allocator,
+    js_env: *jsruntime.Env,
+    comptime _: []jsruntime.API,
+) !void {
+    var get_whole_text = [_]Case{
+        .{ .src = "let text = document.getElementById('link').firstChild", .ex = "undefined" },
+        .{ .src = "text.wholeText === 'OK'", .ex = "true" },
+    };
+    try checkCases(js_env, &get_whole_text);
+}