1 files changed, 63 insertions, 0 deletions
diff --git a/devtools/client/inspector/shared/test/browser_styleinspector_transform-highlighter-02.js b/devtools/client/inspector/shared/test/browser_styleinspector_transform-highlighter-02.js
new file mode 100644
index 0000000000..f1ddc68892
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+++ b/devtools/client/inspector/shared/test/browser_styleinspector_transform-highlighter-02.js
@@ -0,0 +1,63 @@
+/* Any copyright is dedicated to the Public Domain.
+ http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+// Test that the css transform highlighter is created when hovering over a
+// transform property
+
+const TEST_URI = `
+  <style type="text/css">
+    body {
+      transform: skew(16deg);
+      color: yellow;
+    }
+  </style>
+  Test the css transform highlighter
+`;
+
+var TYPE = "CssTransformHighlighter";
+
+add_task(async function () {
+  await addTab("data:text/html;charset=utf-8," + encodeURIComponent(TEST_URI));
+  const { inspector, view } = await openRuleView();
+  let hs = view.highlighters;
+
+  ok(!hs.highlighters[TYPE], "No highlighter exists in the rule-view (1)");
+
+  info("Faking a mousemove on a non-transform property");
+  let { valueSpan } = getRuleViewProperty(view, "body", "color");
+  hs.onMouseMove({ target: valueSpan });
+  ok(!hs.highlighters[TYPE], "No highlighter exists in the rule-view (2)");
+
+  info("Faking a mousemove on a transform property");
+  ({ valueSpan } = getRuleViewProperty(view, "body", "transform"));
+  let onHighlighterShown = hs.once("css-transform-highlighter-shown");
+  hs.onMouseMove({ target: valueSpan });
+  await onHighlighterShown;
+
+  const onComputedViewReady = inspector.once("computed-view-refreshed");
+  const cView = selectComputedView(inspector);
+  await onComputedViewReady;
+  hs = cView.highlighters;
+
+  info("Remove the created transform highlighter");
+  hs.highlighters[TYPE].finalize();
+  hs.highlighters[TYPE] = null;
+
+  info("Faking a mousemove on a non-transform property");
+  ({ valueSpan } = getComputedViewProperty(cView, "color"));
+  hs.onMouseMove({ target: valueSpan });
+  ok(!hs.highlighters[TYPE], "No highlighter exists in the computed-view (3)");
+
+  info("Faking a mousemove on a transform property");
+  ({ valueSpan } = getComputedViewProperty(cView, "transform"));
+  onHighlighterShown = hs.once("css-transform-highlighter-shown");
+  hs.onMouseMove({ target: valueSpan });
+  await onHighlighterShown;
+
+  ok(
+    hs.highlighters[TYPE],
+    "The highlighter has been created in the computed-view"
+  );
+});