1 files changed, 67 insertions, 0 deletions
diff --git a/toolkit/content/tests/widgets/head.js b/toolkit/content/tests/widgets/head.js
new file mode 100644
index 0000000000..d7473fa92d
--- /dev/null
+++ b/toolkit/content/tests/widgets/head.js
@@ -0,0 +1,67 @@
+"use strict";
+
+const InspectorUtils = SpecialPowers.InspectorUtils;
+
+var tests = [];
+
+function waitForCondition(condition, nextTest, errorMsg) {
+  var tries = 0;
+  var interval = setInterval(function () {
+    if (tries >= 30) {
+      ok(false, errorMsg);
+      moveOn();
+    }
+    var conditionPassed;
+    try {
+      conditionPassed = condition();
+    } catch (e) {
+      ok(false, e + "\n" + e.stack);
+      conditionPassed = false;
+    }
+    if (conditionPassed) {
+      moveOn();
+    }
+    tries++;
+  }, 100);
+  var moveOn = function () {
+    clearInterval(interval);
+    nextTest();
+  };
+}
+
+function getElementWithinVideo(video, aValue) {
+  const shadowRoot = SpecialPowers.wrap(video).openOrClosedShadowRoot;
+  return shadowRoot.getElementById(aValue);
+}
+
+/**
+ * Runs querySelectorAll on an element's shadow root.
+ * @param {Element} element
+ * @param {string} selector
+ */
+function shadowRootQuerySelectorAll(element, selector) {
+  const shadowRoot = SpecialPowers.wrap(element).openOrClosedShadowRoot;
+  return shadowRoot?.querySelectorAll(selector);
+}
+
+function executeTests() {
+  return tests
+    .map(fn => () => new Promise(fn))
+    .reduce((promise, task) => promise.then(task), Promise.resolve());
+}
+
+function once(target, name, cb) {
+  let p = new Promise(function (resolve, reject) {
+    target.addEventListener(
+      name,
+      function () {
+        resolve();
+      },
+      { once: true }
+    );
+  });
+  if (cb) {
+    p.then(cb);
+  }
+  return p;
+}