1 files changed, 63 insertions, 0 deletions
diff --git a/testing/web-platform/tests/url/javascript-urls.window.js b/testing/web-platform/tests/url/javascript-urls.window.js
new file mode 100644
index 0000000000..4f617beca1
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+++ b/testing/web-platform/tests/url/javascript-urls.window.js
@@ -0,0 +1,63 @@
+// The results of this test are all over the map due to browsers behaving very differently for
+// javascript: URLs.
+//
+// Chromium is pretty close execution-wise, but it parses javascript: URLs incorrectly.
+// Gecko navigates to non-string return values of the result of executing a javascript: URL.
+// WebKit executes javascript: URLs too early and has a harness error due to URL parsing.
+//
+// The expectations below should match the HTML and URL standards.
+[
+  {
+    "description": "javascript: URL that fails to parse due to invalid host",
+    "input": "javascript://test:test/%0aglobalThis.shouldNotExistA=1",
+    "property": "shouldNotExistA",
+    "expected": undefined
+  },
+  {
+    "description": "javascript: URL that fails to parse due to invalid host and has a U+0009 in scheme",
+    "input": "java\x09script://test:test/%0aglobalThis.shouldNotExistB=1",
+    "property": "shouldNotExistB",
+    "expected": undefined
+  },
+  {
+    "description": "javascript: URL without an opaque path",
+    "input": "javascript://host/1%0a//../0/;globalThis.shouldBeOne=1;/%0aglobalThis.shouldBeOne=2;/..///",
+    "property": "shouldBeOne",
+    "expected": 1
+  },
+  {
+    "description": "javascript: URL containing a JavaScript string split over path and query",
+    // Use ";undefined" to avoid returning a string.
+    "input": "javascript:globalThis.shouldBeAStringA = \"https://whatsoever.com/?a=b&c=5&x=y\";undefined",
+    "property": "shouldBeAStringA",
+    "expected": "https://whatsoever.com/?a=b&c=5&x=y"
+  },
+  {
+    "description": "javascript: URL containing a JavaScript string split over path and query and has a U+000A in scheme",
+    // Use ";undefined" to avoid returning a string.
+    "input": "java\x0Ascript:globalThis.shouldBeAStringB = \"https://whatsoever.com/?a=b&c=5&x=y\";undefined",
+    "property": "shouldBeAStringB",
+    "expected": "https://whatsoever.com/?a=b&c=5&x=y"
+  }
+].forEach(({ description, input, property, expected }) => {
+  // Use promise_test so the tests run in sequence. Needed for globalThis.verify below.
+  promise_test(t => {
+    const anchor = document.body.appendChild(document.createElement("a"));
+    t.add_cleanup(() => anchor.remove());
+    anchor.href = input;
+    assert_equals(globalThis[property], undefined, "Property is undefined before the click");
+    anchor.click();
+    assert_equals(globalThis[property], undefined, "Property is undefined immediately after the click");
+
+    // Since we cannot reliably queue a task to run after the task queued as a result of the click()
+    // above, we do another click() with a new URL.
+    return new Promise(resolve => {
+      globalThis.verify = t.step_func(() => {
+        assert_equals(globalThis[property], expected, `Property is ${expected} once the navigation happened`);
+        resolve();
+      });
+      anchor.href = "javascript:globalThis.verify()";
+      anchor.click();
+    });
+  }, description);
+});