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Test Info:

/* Any copyright is dedicated to the Public Domain.
"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");
});