1 files changed, 53 insertions, 0 deletions
diff --git a/testing/mochitest/tests/browser/browser_browserLoaded_content_loaded.js b/testing/mochitest/tests/browser/browser_browserLoaded_content_loaded.js
new file mode 100644
index 0000000000..fa29e03d23
--- /dev/null
+++ b/testing/mochitest/tests/browser/browser_browserLoaded_content_loaded.js
@@ -0,0 +1,53 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+"use strict";
+
+function isDOMLoaded(browser) {
+  return SpecialPowers.spawn(browser, [], async function () {
+    Assert.equal(
+      content.document.readyState,
+      "complete",
+      "Browser should be loaded."
+    );
+  });
+}
+
+// It checks if calling BrowserTestUtils.browserLoaded() yields
+// browser object.
+add_task(async function () {
+  let tab = BrowserTestUtils.addTab(gBrowser, "http://example.com");
+  let browser = tab.linkedBrowser;
+  await BrowserTestUtils.browserLoaded(browser);
+  await isDOMLoaded(browser);
+  gBrowser.removeTab(tab);
+});
+
+// It checks that BrowserTestUtils.browserLoaded() works well with
+// promise.all().
+add_task(async function () {
+  let tabURLs = [
+    `http://example.org`,
+    `http://mochi.test:8888`,
+    `http://test:80`,
+  ];
+  // Add tabs, get the respective browsers
+  let browsers = tabURLs.map(
+    u => BrowserTestUtils.addTab(gBrowser, u).linkedBrowser
+  );
+
+  // wait for promises to settle
+  await Promise.all(
+    (function* () {
+      for (let b of browsers) {
+        yield BrowserTestUtils.browserLoaded(b);
+      }
+    })()
+  );
+  for (const browser of browsers) {
+    await isDOMLoaded(browser);
+  }
+  // cleanup
+  browsers
+    .map(browser => gBrowser.getTabForBrowser(browser))
+    .forEach(tab => gBrowser.removeTab(tab));
+});