1 files changed, 42 insertions, 0 deletions
diff --git a/devtools/client/debugger/test/mochitest/browser_dbg-navigation-when-paused.js b/devtools/client/debugger/test/mochitest/browser_dbg-navigation-when-paused.js
new file mode 100644
index 0000000000..9af7228527
--- /dev/null
+++ b/devtools/client/debugger/test/mochitest/browser_dbg-navigation-when-paused.js
@@ -0,0 +1,42 @@
+/* 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/>. */
+
+"use strict";
+
+add_task(async function () {
+  const dbg = await initDebugger("doc-navigation-when-paused.html");
+
+  await togglePauseOnExceptions(dbg, true, true);
+
+  clickElementInTab("body");
+
+  await waitForPaused(dbg, "doc-navigation-when-paused.html");
+
+  assertPausedAtSourceAndLine(
+    dbg,
+    findSource(dbg, "doc-navigation-when-paused.html").id,
+    12
+  );
+
+  await navigate(
+    dbg,
+    "doc-navigation-when-paused.html",
+    "doc-navigation-when-paused.html"
+  );
+
+  clickElementInTab("body");
+
+  await waitForPaused(dbg, "doc-navigation-when-paused.html");
+
+  // If breakpoints aren't properly ignored after navigation, this could
+  // potentially pause at line 9. This helper also ensures that the file
+  // source itself has loaded, which may not be the case if navigation cleared
+  // the source and nothing has sent it to the devtools client yet, as was
+  // the case in Bug 1581530.
+  assertPausedAtSourceAndLine(
+    dbg,
+    findSource(dbg, "doc-navigation-when-paused.html").id,
+    12
+  );
+});