1 files changed, 18 insertions, 0 deletions
diff --git a/devtools/client/debugger/test/mochitest/browser_dbg-editor-mode.js b/devtools/client/debugger/test/mochitest/browser_dbg-editor-mode.js
new file mode 100644
index 0000000000..6cec2e1dbf
--- /dev/null
+++ b/devtools/client/debugger/test/mochitest/browser_dbg-editor-mode.js
@@ -0,0 +1,18 @@
+/* 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/>. */
+
+// Tests that the editor sets the correct mode for different file
+// types
+
+"use strict";
+
+add_task(async function () {
+  const dbg = await initDebugger("doc-scripts.html", "simple1.js");
+
+  await selectSource(dbg, "simple1.js");
+  is(dbg.getCM().getOption("mode").name, "javascript", "Mode is correct");
+
+  await selectSource(dbg, "doc-scripts.html");
+  is(dbg.getCM().getOption("mode").name, "htmlmixed", "Mode is correct");
+});