1 files changed, 89 insertions, 0 deletions
diff --git a/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/resources/helpers.js b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/resources/helpers.js
new file mode 100644
index 0000000000..58102aa925
--- /dev/null
+++ b/testing/web-platform/tests/html/browsers/browsing-the-web/navigating-across-documents/replace-before-load/resources/helpers.js
@@ -0,0 +1,89 @@
+window.waitForLoad = (t, iframe, urlRelativeToThisDocument) => {
+  return new Promise(resolve => {
+    iframe.addEventListener("load", t.step_func(() => {
+      assert_equals(iframe.contentWindow.location.href, (new URL(urlRelativeToThisDocument, location.href)).href);
+
+      // Wait a bit longer to ensure all history stuff has settled, e.g. the document is "completely loaded"
+      // (which happens from a queued task).
+      setTimeout(resolve, 0);
+    }), { once: true });
+  });
+};
+
+window.waitForLoadAllowingIntermediateLoads = (t, iframe, urlRelativeToThisDocument) => {
+  return new Promise(resolve => {
+    const handler = t.step_func(() => {
+      if (iframe.contentWindow.location.href === (new URL(urlRelativeToThisDocument, location.href)).href) {
+        // Wait a bit longer to ensure all history stuff has settled, e.g. the document is "completely loaded"
+        // (which happens from a queued task).
+        setTimeout(resolve, 0);
+        iframe.removeEventListener("load", handler);
+      }
+    });
+
+    iframe.addEventListener("load", handler);
+  });
+};
+
+window.waitForMessage = () => {
+  return new Promise(resolve => {
+    window.addEventListener("message", e => {
+      resolve(e.data);
+    }, { once: true });
+  });
+};
+
+window.setupSentinelIframe = async (t) => {
+  // If this iframe gets navigated by history.back(), then the iframe under test did not, so we did a replace.
+  const sentinelIframe = document.createElement("iframe");
+  sentinelIframe.src = "/common/blank.html?sentinelstart";
+  document.body.append(sentinelIframe);
+  t.add_cleanup(() => sentinelIframe.remove());
+
+  await waitForLoad(t, sentinelIframe, "/common/blank.html?sentinelstart");
+
+  sentinelIframe.src = "/common/blank.html?sentinelend";
+  await waitForLoad(t, sentinelIframe, "/common/blank.html?sentinelend");
+
+  return sentinelIframe;
+};
+
+window.checkSentinelIframe = async (t, sentinelIframe) => {
+  // Go back. Since iframe should have done a replace, this should move sentinelIframe back, not iframe.
+  history.back();
+  await waitForLoad(t, sentinelIframe, "/common/blank.html?sentinelstart");
+};
+
+window.insertIframe = (t, url, name) => {
+  const iframe = document.createElement("iframe");
+  iframe.src = url;
+
+  // In at least Chromium, window name targeting for form submission doesn't work if the name is set
+  // after the iframe is inserted into the DOM. So we can't just have callers do this themselves.
+  if (name) {
+    iframe.name = name;
+  }
+
+  document.body.append(iframe);
+
+  // Intentionally not including the following:
+  //  t.add_cleanup(() => iframe.remove());
+  // Doing so breaks some of the testdriver.js tests with "cannot find window" errors.
+  return iframe;
+};
+
+// TODO(domenic): clean up other tests in the parent directory to use this.
+window.absoluteURL = relativeURL => {
+  return (new URL(relativeURL, location.href)).href;
+};
+
+// TODO(domenic): clean up other tests in the parent directory to use this.
+window.codeInjectorURL = code => {
+  return absoluteURL("resources/code-injector.html?pipe=sub(none)&code=" + encodeURIComponent(code));
+};
+
+window.changeURLHost = (url, newHost) => {
+  const urlObj = new URL(url);
+  urlObj.host = newHost;
+  return urlObj.href;
+};