1 files changed, 33 insertions, 0 deletions
diff --git a/devtools/client/inspector/rules/test/browser_rules_mark_overridden_03.js b/devtools/client/inspector/rules/test/browser_rules_mark_overridden_03.js
new file mode 100644
index 0000000000..9acb4ae8cd
--- /dev/null
+++ b/devtools/client/inspector/rules/test/browser_rules_mark_overridden_03.js
@@ -0,0 +1,33 @@
+/* Any copyright is dedicated to the Public Domain.
+ http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+// Tests that the rule view marks overridden rules correctly based on the
+// priority for the rule
+
+const TEST_URI = `
+  <style type='text/css'>
+  #testid {
+    background-color: blue;
+  }
+  .testclass {
+    background-color: green !important;
+  }
+  </style>
+  <div id='testid' class='testclass'>Styled Node</div>
+`;
+
+add_task(async function () {
+  await addTab("data:text/html;charset=utf-8," + encodeURIComponent(TEST_URI));
+  const { inspector, view } = await openRuleView();
+  await selectNode("#testid", inspector);
+
+  const idProp = getTextProperty(view, 1, { "background-color": "blue" });
+  ok(idProp.overridden, "Not-important rule should be overridden.");
+
+  const classProp = getTextProperty(view, 2, { "background-color": "green" });
+  ok(!classProp.overridden, "Important rule should not be overridden.");
+
+  ok(idProp.overridden, "ID property should be overridden.");
+});