1 files changed, 100 insertions, 0 deletions
diff --git a/toolkit/devtools/markupview/test/browser_markupview_mutation_02.js b/toolkit/devtools/markupview/test/browser_markupview_mutation_02.js
new file mode 100644
index 000000000..c55479ae9
--- /dev/null
+++ b/toolkit/devtools/markupview/test/browser_markupview_mutation_02.js
@@ -0,0 +1,100 @@
+/* vim: set 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 markup-containers in the markup-view do flash when their
+// corresponding DOM nodes mutate
+
+const TEST_URL = TEST_URL_ROOT + "doc_markup_flashing.html";
+
+// The test data contains a list of mutations to test.
+// Each item is an object:
+// - desc: a description of the test step, for better logging
+// - mutate: a function that should make changes to the content DOM
+// - flashedNode: [optional] the css selector of the node that is expected to
+//   flash in the markup-view as a result of the mutation.
+//   If missing, the rootNode (".list") will be expected to flash
+const TEST_DATA = [{
+  desc: "Adding a new node should flash the new node",
+  mutate: (doc, rootNode) => {
+    let newLi = doc.createElement("LI");
+    newLi.textContent = "new list item";
+    rootNode.appendChild(newLi);
+  },
+  flashedNode: ".list li:nth-child(3)"
+}, {
+  desc: "Removing a node should flash its parent",
+  mutate: (doc, rootNode) => {
+    rootNode.removeChild(rootNode.lastElementChild);
+  }
+}, {
+  desc: "Re-appending an existing node should only flash this node",
+  mutate: (doc, rootNode) => {
+    rootNode.appendChild(rootNode.firstElementChild);
+  },
+  flashedNode: ".list .item:last-child"
+}, {
+  desc: "Adding an attribute should flash the node",
+  mutate: (doc, rootNode) => {
+    rootNode.setAttribute("name-" + Date.now(), "value-" + Date.now());
+  }
+}, {
+  desc: "Editing an attribute should flash the node",
+  mutate: (doc, rootNode) => {
+    rootNode.setAttribute("class", "list value-" + Date.now());
+  }
+}, {
+  desc: "Removing an attribute should flash the node",
+  mutate: (doc, rootNode) => {
+    rootNode.removeAttribute("class");
+  }
+}];
+
+add_task(function*() {
+  let {inspector} = yield addTab(TEST_URL).then(openInspector);
+
+  // Make sure mutated nodes flash for a very long time so we can more easily
+  // assert they do
+  inspector.markup.CONTAINER_FLASHING_DURATION = 1000 * 60 * 60;
+
+  info("Getting the <ul.list> root node to test mutations on");
+  let rootNode = getNode(".list");
+  let rootNodeFront = yield getNodeFront(".list", inspector);
+
+  info("Selecting the last element of the root node before starting");
+  yield selectNode(".list .item:nth-child(2)", inspector);
+
+  for (let {mutate, flashedNode, desc} of TEST_DATA) {
+    info("Starting test: " + desc);
+
+    info("Mutating the DOM and listening for markupmutation event");
+    let mutated = inspector.once("markupmutation");
+    let updated = inspector.once("inspector-updated");
+    mutate(content.document, rootNode);
+    yield mutated;
+
+    info("Asserting that the correct markup-container is flashing");
+    let flashingNodeFront = rootNodeFront;
+    if (flashedNode) {
+      flashingNodeFront = yield getNodeFront(flashedNode, inspector);
+    }
+    yield assertNodeFlashing(flashingNodeFront, inspector);
+
+    // Making sure the inspector has finished updating before moving on
+    yield updated;
+  }
+});
+
+function* assertNodeFlashing(nodeFront, inspector) {
+  let container = getContainerForNodeFront(nodeFront, inspector);
+  ok(container, "Markup container for node found");
+  ok(container.tagState.classList.contains("theme-bg-contrast"),
+    "Markup container for node is flashing");
+
+  // Clear the mutation flashing timeout now that we checked the node was flashing
+  let markup = inspector.markup;
+  markup._frame.contentWindow.clearTimeout(container._flashMutationTimer);
+  container._flashMutationTimer = null;
+}