1 files changed, 38 insertions, 0 deletions
diff --git a/devtools/client/inspector/test/browser_inspector_pane-toggle-03.js b/devtools/client/inspector/test/browser_inspector_pane-toggle-03.js
new file mode 100644
index 000000000..02fffd995
--- /dev/null
+++ b/devtools/client/inspector/test/browser_inspector_pane-toggle-03.js
@@ -0,0 +1,38 @@
+/* vim: set ft=javascript ts=2 et sw=2 tw=80: */
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+"use strict";
+
+// Test that the toggle button can collapse and expand the inspector side/bottom
+// panel, and that the appropriate attributes are updated in the process.
+
+add_task(function* () {
+  let {inspector} = yield openInspectorForURL("about:blank");
+
+  let button = inspector.panelDoc.querySelector(".sidebar-toggle");
+  let panel = inspector.panelDoc.querySelector("#inspector-splitter-box .controlled");
+
+  ok(!button.classList.contains("pane-collapsed"), "The button is in expanded state");
+
+  info("Listen to the end of the animation on the sidebar panel");
+  let onTransitionEnd = once(panel, "transitionend");
+
+  info("Click on the toggle button");
+  EventUtils.synthesizeMouseAtCenter(button, {},
+    inspector.panelDoc.defaultView);
+
+  yield onTransitionEnd;
+  ok(button.classList.contains("pane-collapsed"), "The button is in collapsed state");
+  ok(panel.classList.contains("pane-collapsed"), "The panel is in collapsed state");
+
+  info("Listen again to the end of the animation on the sidebar panel");
+  onTransitionEnd = once(panel, "transitionend");
+
+  info("Click on the toggle button again");
+  EventUtils.synthesizeMouseAtCenter(button, {},
+    inspector.panelDoc.defaultView);
+
+  yield onTransitionEnd;
+  ok(!button.classList.contains("pane-collapsed"), "The button is in expanded state");
+  ok(!panel.classList.contains("pane-collapsed"), "The panel is in expanded state");
+});