1 files changed, 60 insertions, 0 deletions
diff --git a/devtools/client/inspector/changes/test/browser_changes_rule_selector.js b/devtools/client/inspector/changes/test/browser_changes_rule_selector.js
new file mode 100644
index 0000000000..20d3fba654
--- /dev/null
+++ b/devtools/client/inspector/changes/test/browser_changes_rule_selector.js
@@ -0,0 +1,60 @@
+/* Any copyright is dedicated to the Public Domain.
+ http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+// Test that renaming the selector of a CSS rule is tracked.
+// Expect a selector removal followed by a selector addition and no changed declarations
+
+const TEST_URI = `
+  <style type='text/css'>
+    div {
+      color: red;
+    }
+  </style>
+  <div></div>
+`;
+
+add_task(async function () {
+  await addTab("data:text/html;charset=utf-8," + encodeURIComponent(TEST_URI));
+  const { inspector, view: ruleView } = await openRuleView();
+  const { document: doc, store } = selectChangesView(inspector);
+  const panel = doc.querySelector("#sidebar-panel-changes");
+
+  await selectNode("div", inspector);
+  const ruleEditor = getRuleViewRuleEditor(ruleView, 1);
+
+  info("Focusing the first rule's selector name in the Rule view");
+  const editor = await focusEditableField(ruleView, ruleEditor.selectorText);
+  info("Entering a new selector name");
+  editor.input.value = ".test";
+
+  // Expect two "TRACK_CHANGE" actions: one for removal, one for addition.
+  const onTrackChange = waitForDispatch(store, "TRACK_CHANGE", 2);
+  const onRuleViewChanged = once(ruleView, "ruleview-changed");
+  info("Pressing Enter key to commit the change");
+  EventUtils.synthesizeKey("KEY_Enter");
+  info("Waiting for rule view to update");
+  await onRuleViewChanged;
+  info("Wait for the change to be tracked");
+  await onTrackChange;
+
+  const rules = panel.querySelectorAll(".changes__rule");
+  is(rules.length, 1, "One rule was tracked as changed");
+
+  info("Expect old selector to be removed and new selector to be added");
+  const addedSelectors = getAddedSelectors(panel);
+  const removedSelectors = getRemovedSelectors(panel);
+  is(addedSelectors.length, 1, "One new selector was tracked as added");
+  is(addedSelectors.item(0).title, ".test", "New selector is correct");
+  is(removedSelectors.length, 1, "One old selector was tracked as removed");
+  is(removedSelectors.item(0).title, "div", "Old selector is correct");
+
+  info(
+    "Expect no declarations to have been added or removed during selector change"
+  );
+  const removeDecl = getRemovedDeclarations(doc, rules.item(0));
+  is(removeDecl.length, 0, "No declarations removed");
+  const addDecl = getAddedDeclarations(doc, rules.item(0));
+  is(addDecl.length, 0, "No declarations added");
+});