1 files changed, 54 insertions, 0 deletions
diff --git a/devtools/client/inspector/rules/test/browser_rules_add-property-cancel_01.js b/devtools/client/inspector/rules/test/browser_rules_add-property-cancel_01.js
new file mode 100644
index 0000000000..9131da6423
--- /dev/null
+++ b/devtools/client/inspector/rules/test/browser_rules_add-property-cancel_01.js
@@ -0,0 +1,54 @@
+/* Any copyright is dedicated to the Public Domain.
+ http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+// Tests adding a new property and escapes the new empty property name editor.
+
+const TEST_URI = `
+  <style type="text/css">
+    #testid {
+      background-color: blue;
+    }
+    .testclass {
+      background-color: green;
+    }
+  </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 elementRuleEditor = getRuleViewRuleEditor(view, 0);
+  const editor = await focusNewRuleViewProperty(elementRuleEditor);
+  is(
+    inplaceEditor(elementRuleEditor.newPropSpan),
+    editor,
+    "The new property editor got focused"
+  );
+
+  info("Escape the new property editor");
+  const onBlur = once(editor.input, "blur");
+  EventUtils.synthesizeKey("VK_ESCAPE", {}, view.styleWindow);
+  await onBlur;
+
+  info("Checking the state of cancelling a new property name editor");
+  is(
+    elementRuleEditor.rule.textProps.length,
+    0,
+    "Should have cancelled creating a new text property."
+  );
+  ok(
+    !elementRuleEditor.propertyList.hasChildNodes(),
+    "Should not have any properties."
+  );
+
+  is(
+    view.styleDocument.activeElement,
+    view.styleDocument.body,
+    "Correct element has focus"
+  );
+});