1 files changed, 57 insertions, 0 deletions
diff --git a/devtools/client/inspector/markup/test/browser_markup_update-on-navigtion.js b/devtools/client/inspector/markup/test/browser_markup_update-on-navigtion.js
new file mode 100644
index 0000000000..e495580d66
--- /dev/null
+++ b/devtools/client/inspector/markup/test/browser_markup_update-on-navigtion.js
@@ -0,0 +1,57 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+"use strict";
+
+// Test that markup view handles page navigation correctly.
+
+const URL_1 = URL_ROOT_SSL + "doc_markup_update-on-navigtion_1.html";
+const URL_2 = URL_ROOT_SSL + "doc_markup_update-on-navigtion_2.html";
+
+add_task(async function () {
+  const { inspector, toolbox } = await openInspectorForURL(URL_1);
+
+  assertMarkupViewIsLoaded();
+  await selectNode("#one", inspector);
+
+  const { resourceCommand } = toolbox.commands;
+  const { onResource: willNavigate } =
+    await resourceCommand.waitForNextResource(
+      resourceCommand.TYPES.DOCUMENT_EVENT,
+      {
+        ignoreExistingResources: true,
+        predicate(resource) {
+          return resource.name == "will-navigate";
+        },
+      }
+    );
+
+  // We should not await on navigateTo here, because the test will assert the
+  // various phases of the inspector during the navigation.
+  const onNavigated = navigateTo(URL_2);
+
+  info("Waiting for will-navigate");
+  await willNavigate;
+
+  info("Navigation to page 2 has started, the inspector should be empty");
+  assertMarkupViewIsEmpty();
+
+  info("Waiting for new-root");
+  await inspector.once("new-root");
+
+  info("Navigation to page 2 was done, the inspector should be back up");
+  assertMarkupViewIsLoaded();
+
+  await onNavigated;
+  await selectNode("#two", inspector);
+
+  function assertMarkupViewIsLoaded() {
+    const markupViewBox = inspector.panelDoc.getElementById("markup-box");
+    is(markupViewBox.childNodes.length, 1, "The markup-view is loaded");
+  }
+
+  function assertMarkupViewIsEmpty() {
+    const markupViewFrame =
+      inspector._markupFrame.contentDocument.getElementById("root");
+    is(markupViewFrame.childNodes.length, 0, "The markup-view is unloaded");
+  }
+});