1 files changed, 63 insertions, 0 deletions
diff --git a/devtools/client/inspector/rules/test/browser_rules_class_panel_toggle.js b/devtools/client/inspector/rules/test/browser_rules_class_panel_toggle.js
new file mode 100644
index 0000000000..44e372acee
--- /dev/null
+++ b/devtools/client/inspector/rules/test/browser_rules_class_panel_toggle.js
@@ -0,0 +1,63 @@
+/* Any copyright is dedicated to the Public Domain.
+ http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+// Test that the class panel can be toggled.
+
+add_task(async function () {
+  await addTab("data:text/html;charset=utf-8,<body class='class1 class2'>");
+  const { inspector, view } = await openRuleView();
+
+  info("Check that the toggle button exists");
+  const button = inspector.panelDoc.querySelector("#class-panel-toggle");
+  ok(button, "The class panel toggle button exists");
+  is(view.classToggle, button, "The rule-view refers to the right element");
+
+  info("Check that the panel exists and is hidden by default");
+  const panel = inspector.panelDoc.querySelector("#ruleview-class-panel");
+  ok(panel, "The class panel exists");
+  is(view.classPanel, panel, "The rule-view refers to the right element");
+  ok(panel.hasAttribute("hidden"), "The panel is hidden");
+  is(
+    button.getAttribute("aria-pressed"),
+    "false",
+    "The button is not pressed by default"
+  );
+  is(
+    inspector.panelDoc.getElementById(button.getAttribute("aria-controls")),
+    panel,
+    "The class panel toggle button has valid aria-controls attribute"
+  );
+
+  info("Click on the button to show the panel");
+  button.click();
+  ok(!panel.hasAttribute("hidden"), "The panel is shown");
+  is(button.getAttribute("aria-pressed"), "true", "The button is pressed");
+
+  info("Click again to hide the panel");
+  button.click();
+  ok(panel.hasAttribute("hidden"), "The panel is hidden");
+  is(button.getAttribute("aria-pressed"), "false", "The button is not pressed");
+
+  info("Open the pseudo-class panel first, then the class panel");
+  view.pseudoClassToggle.click();
+  ok(
+    !view.pseudoClassPanel.hasAttribute("hidden"),
+    "The pseudo-class panel is shown"
+  );
+  button.click();
+  ok(!panel.hasAttribute("hidden"), "The panel is shown");
+  ok(
+    view.pseudoClassPanel.hasAttribute("hidden"),
+    "The pseudo-class panel is hidden"
+  );
+
+  info("Click again on the pseudo-class button");
+  view.pseudoClassToggle.click();
+  ok(panel.hasAttribute("hidden"), "The panel is hidden");
+  ok(
+    !view.pseudoClassPanel.hasAttribute("hidden"),
+    "The pseudo-class panel is shown"
+  );
+});