1 files changed, 28 insertions, 0 deletions
diff --git a/devtools/client/debugger/test/mochitest/browser_dbg-sourcemaps-reloading-quickly.js b/devtools/client/debugger/test/mochitest/browser_dbg-sourcemaps-reloading-quickly.js
new file mode 100644
index 0000000000..ed2a3ceeac
--- /dev/null
+++ b/devtools/client/debugger/test/mochitest/browser_dbg-sourcemaps-reloading-quickly.js
@@ -0,0 +1,28 @@
+/* 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 reloading an original file while the sourcemap is loading.
+ * The test passes when the selected source is visible after two reloads.
+ */
+
+"use strict";
+
+add_task(async function () {
+  const dbg = await initDebugger("doc-sourcemaps.html");
+
+  await waitForSources(dbg, "entry.js");
+  await selectSource(dbg, "entry.js");
+
+  await reload(dbg);
+  await waitForSources(dbg, "bundle.js");
+
+  await reload(dbg);
+  await waitForLoadedSource(dbg, "entry.js");
+
+  ok(
+    getCM(dbg).getValue().includes("window.keepMeAlive"),
+    "Original source text loaded correctly"
+  );
+});