1 files changed, 59 insertions, 0 deletions
diff --git a/devtools/client/inspector/markup/test/browser_markup_toggle_01.js b/devtools/client/inspector/markup/test/browser_markup_toggle_01.js
new file mode 100644
index 0000000000..93e7dbdd50
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+++ b/devtools/client/inspector/markup/test/browser_markup_toggle_01.js
@@ -0,0 +1,59 @@
+/* Any copyright is dedicated to the Public Domain.
+ http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+// Test toggling (expand/collapse) elements by clicking on twisties
+
+const TEST_URL = URL_ROOT + "doc_markup_toggle.html";
+
+add_task(async function () {
+  const { inspector } = await openInspectorForURL(TEST_URL);
+
+  info("Getting the container for the html element");
+  let container = await getContainerForSelector("html", inspector);
+  ok(container.mustExpand, "HTML element mustExpand");
+  ok(container.canExpand, "HTML element canExpand");
+  is(container.expander.style.visibility, "hidden", "HTML twisty is hidden");
+
+  info("Getting the container for the UL parent element");
+  container = await getContainerForSelector("ul", inspector);
+  ok(!container.mustExpand, "UL element !mustExpand");
+  ok(container.canExpand, "UL element canExpand");
+  is(container.expander.style.visibility, "visible", "HTML twisty is visible");
+  ok(!container.selected, "UL container is not selected");
+
+  info("Clicking on the UL parent expander, and waiting for children");
+  await toggleContainerByClick(inspector, container);
+  ok(!container.selected, "UL container is still not selected after expand");
+
+  info("Checking that child LI elements have been created");
+  let numLi = await getNumberOfMatchingElementsInContentPage("li");
+  for (let i = 0; i < numLi; i++) {
+    const liContainer = await getContainerForSelector(
+      `li:nth-child(${i + 1})`,
+      inspector
+    );
+    ok(liContainer, "A container for the child LI element was created");
+  }
+  ok(container.expanded, "Parent UL container is expanded");
+
+  info("Clicking again on the UL expander");
+  await toggleContainerByClick(inspector, container);
+  ok(!container.selected, "UL container is still not selected after collapse");
+
+  info("Checking that child LI elements have been hidden");
+  numLi = await getNumberOfMatchingElementsInContentPage("li");
+  for (let i = 0; i < numLi; i++) {
+    const liContainer = await getContainerForSelector(
+      `li:nth-child(${i + 1})`,
+      inspector
+    );
+    is(
+      liContainer.elt.getClientRects().length,
+      0,
+      "The container for the child LI element was hidden"
+    );
+  }
+  ok(!container.expanded, "Parent UL container is collapsed");
+});