1 files changed, 103 insertions, 0 deletions
diff --git a/devtools/client/inspector/boxmodel/test/browser_boxmodel_layout-accordion-state.js b/devtools/client/inspector/boxmodel/test/browser_boxmodel_layout-accordion-state.js
new file mode 100644
index 0000000000..d6802f4e5d
--- /dev/null
+++ b/devtools/client/inspector/boxmodel/test/browser_boxmodel_layout-accordion-state.js
@@ -0,0 +1,103 @@
+/* Any copyright is dedicated to the Public Domain.
+ http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+// Tests that the box model's accordion state is persistent through hide/show in the
+// layout view.
+
+const TEST_URI = `
+  <style>
+    #div1 {
+      margin: 10px;
+      padding: 3px;
+    }
+  </style>
+  <div id="div1"></div>
+`;
+
+const BOXMODEL_OPENED_PREF = "devtools.layout.boxmodel.opened";
+const ACCORDION_HEADER_SELECTOR = ".accordion-header";
+const ACCORDION_CONTENT_SELECTOR = ".accordion-content";
+
+add_task(async function () {
+  await addTab("data:text/html;charset=utf-8," + encodeURIComponent(TEST_URI));
+  const { inspector, boxmodel, toolbox } = await openLayoutView();
+  const { document: doc } = boxmodel;
+
+  await testAccordionStateAfterClickingHeader(doc);
+  await testAccordionStateAfterSwitchingSidebars(inspector, doc);
+  await testAccordionStateAfterReopeningLayoutView(toolbox);
+
+  Services.prefs.clearUserPref(BOXMODEL_OPENED_PREF);
+});
+
+function testAccordionStateAfterClickingHeader(doc) {
+  const item = doc.querySelector("#layout-section-boxmodel");
+  const header = item.querySelector(ACCORDION_HEADER_SELECTOR);
+  const content = item.querySelector(ACCORDION_CONTENT_SELECTOR);
+
+  info("Checking initial state of the box model panel.");
+  ok(
+    !content.hidden && content.childElementCount > 0,
+    "The box model panel content is visible."
+  );
+  ok(
+    Services.prefs.getBoolPref(BOXMODEL_OPENED_PREF),
+    `${BOXMODEL_OPENED_PREF} is pref on by default.`
+  );
+
+  info("Clicking the box model header to hide the box model panel.");
+  header.click();
+
+  info("Checking the new state of the box model panel.");
+  ok(content.hidden, "The box model panel content is hidden.");
+  ok(
+    !Services.prefs.getBoolPref(BOXMODEL_OPENED_PREF),
+    `${BOXMODEL_OPENED_PREF} is pref off.`
+  );
+}
+
+function testAccordionStateAfterSwitchingSidebars(inspector, doc) {
+  info(
+    "Checking the box model accordion state is persistent after switching sidebars."
+  );
+
+  info("Selecting the computed view.");
+  inspector.sidebar.select("computedview");
+
+  info("Selecting the layout view.");
+  inspector.sidebar.select("layoutview");
+
+  info("Checking the state of the box model panel.");
+  const item = doc.querySelector("#layout-section-boxmodel");
+  const content = item.querySelector(ACCORDION_CONTENT_SELECTOR);
+
+  ok(content.hidden, "The box model panel content is hidden.");
+  ok(
+    !Services.prefs.getBoolPref(BOXMODEL_OPENED_PREF),
+    `${BOXMODEL_OPENED_PREF} is pref off.`
+  );
+}
+
+async function testAccordionStateAfterReopeningLayoutView(toolbox) {
+  info(
+    "Checking the box model accordion state is persistent after closing and " +
+      "re-opening the layout view."
+  );
+
+  info("Closing the toolbox.");
+  await toolbox.destroy();
+
+  info("Re-opening the layout view.");
+  const { boxmodel } = await openLayoutView();
+  const item = boxmodel.document.querySelector("#layout-section-boxmodel");
+  const content = item.querySelector(ACCORDION_CONTENT_SELECTOR);
+
+  info("Checking the state of the box model panel.");
+  ok(content.hidden, "The box model panel content is hidden.");
+  ok(
+    !Services.prefs.getBoolPref(BOXMODEL_OPENED_PREF),
+    `${BOXMODEL_OPENED_PREF} is pref off.`
+  );
+}