1 files changed, 60 insertions, 0 deletions
diff --git a/devtools/client/debugger/test/mochitest/browser_dbg-iframes.js b/devtools/client/debugger/test/mochitest/browser_dbg-iframes.js
new file mode 100644
index 0000000000..0bcc0e020f
--- /dev/null
+++ b/devtools/client/debugger/test/mochitest/browser_dbg-iframes.js
@@ -0,0 +1,60 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at <http://mozilla.org/MPL/2.0/>. */
+
+// Test is taking too much time to complete on some hardware since
+// release at https://bugzilla.mozilla.org/show_bug.cgi?id=1423158
+
+"use strict";
+
+requestLongerTimeout(3);
+
+/**
+ * Test debugging a page with iframes
+ *  1. pause in the main thread
+ *  2. pause in the iframe
+ */
+add_task(async function () {
+  const dbg = await initDebugger("doc-iframes.html");
+
+  // test pausing in the main thread
+  const onReloaded = reload(dbg);
+  await waitForPaused(dbg);
+  await waitForLoadedSource(dbg, "doc-iframes.html");
+  assertPausedAtSourceAndLine(dbg, findSource(dbg, "doc-iframes.html").id, 11);
+
+  // test pausing in the iframe
+  await resume(dbg);
+  await waitForPaused(dbg);
+  await waitForLoadedSource(dbg, "doc-debugger-statements.html");
+  assertPausedAtSourceAndLine(
+    dbg,
+    findSource(dbg, "doc-debugger-statements.html").id,
+    11
+  );
+
+  // test pausing in the iframe
+  await resume(dbg);
+  await waitForPaused(dbg);
+  assertPausedAtSourceAndLine(
+    dbg,
+    findSource(dbg, "doc-debugger-statements.html").id,
+    16
+  );
+  await waitFor(() => dbg.toolbox.isHighlighted("jsdebugger"));
+  ok(true, "Debugger is highlighted when paused");
+
+  if (isFissionEnabled() || isEveryFrameTargetEnabled()) {
+    info("Remove the iframe and wait for resume");
+    await SpecialPowers.spawn(gBrowser.selectedBrowser, [], () => {
+      const iframe = content.document.querySelector("iframe");
+      iframe.remove();
+    });
+    await waitForResumed(dbg);
+    await waitFor(() => !dbg.toolbox.isHighlighted("jsdebugger"));
+    ok(true, "Debugger is no longer highlighted when resumed");
+
+    info("Wait for reload to complete after resume");
+    await onReloaded;
+  }
+});