1 files changed, 48 insertions, 0 deletions
diff --git a/devtools/client/styleeditor/test/browser_styleeditor_highlight-selector.js b/devtools/client/styleeditor/test/browser_styleeditor_highlight-selector.js
new file mode 100644
index 000000000..8effbf208
--- /dev/null
+++ b/devtools/client/styleeditor/test/browser_styleeditor_highlight-selector.js
@@ -0,0 +1,48 @@
+/* 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 hovering over a simple selector in the style-editor requests the
+// highlighting of the corresponding nodes
+
+const TEST_URL = "data:text/html;charset=utf8," +
+                 "<style>div{color:red}</style><div>highlighter test</div>";
+
+add_task(function* () {
+  let { ui } = yield openStyleEditorForURL(TEST_URL);
+  let editor = ui.editors[0];
+
+  // Mock the highlighter so we can locally assert that things happened
+  // correctly instead of accessing the highlighter elements
+  editor.highlighter = {
+    isShown: false,
+    options: null,
+
+    show: function (node, options) {
+      this.isShown = true;
+      this.options = options;
+      return promise.resolve();
+    },
+
+    hide: function () {
+      this.isShown = false;
+    }
+  };
+
+  info("Expecting a node-highlighted event");
+  let onHighlighted = editor.once("node-highlighted");
+
+  info("Simulate a mousemove event on the div selector");
+  editor._onMouseMove({clientX: 56, clientY: 10});
+  yield onHighlighted;
+
+  ok(editor.highlighter.isShown, "The highlighter is now shown");
+  is(editor.highlighter.options.selector, "div", "The selector is correct");
+
+  info("Simulate a mousemove event elsewhere in the editor");
+  editor._onMouseMove({clientX: 16, clientY: 0});
+
+  ok(!editor.highlighter.isShown, "The highlighter is now hidden");
+});