1 files changed, 30 insertions, 0 deletions
diff --git a/devtools/client/shared/sourceeditor/test/browser_editor_history.js b/devtools/client/shared/sourceeditor/test/browser_editor_history.js
new file mode 100644
index 0000000000..2602c28236
--- /dev/null
+++ b/devtools/client/shared/sourceeditor/test/browser_editor_history.js
@@ -0,0 +1,30 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+async function test() {
+  waitForExplicitFinish();
+  const { ed, win } = await setup();
+  ok(ed.isClean(), "default isClean");
+  ok(!ed.canUndo(), "default canUndo");
+  ok(!ed.canRedo(), "default canRedo");
+
+  ed.setText("Hello, World!");
+  ok(!ed.isClean(), "isClean");
+  ok(ed.canUndo(), "canUndo");
+  ok(!ed.canRedo(), "canRedo");
+
+  ed.undo();
+  ok(ed.isClean(), "isClean after undo");
+  ok(!ed.canUndo(), "canUndo after undo");
+  ok(ed.canRedo(), "canRedo after undo");
+
+  ed.setText("What's up?");
+  ed.setClean();
+  ok(ed.isClean(), "isClean after setClean");
+  ok(ed.canUndo(), "canUndo after setClean");
+  ok(!ed.canRedo(), "canRedo after setClean");
+
+  teardown(ed, win);
+}