'parses nested commas in selectors correctly' was failing after this …

…PR, however I don't think that the previous behaviour was desirable, so have added a new test to formalize this expectation

packages/rrweb-snapshot/test/css.test.ts

@@ -50,10 +50,18 @@ describe('css parser', () => {
   describe('pseudoClassPlugin', () => {
     it('parses nested commas in selectors correctly', () => {
       const cssText =
-        'body > ul :is(li:not(:first-of-type) a:hover, li:not(:first-of-type).active a) {background: red;}';
+        'body > ul :is(li:not(:first-of-type) a.current, li:not(:first-of-type).active a) {background: red;}';
       expect(parse(pseudoClassPlugin, cssText)).toEqual(cssText);
     });
 
+    it("doesn't ignore :hover within :is brackets", () => {
+      const cssText =
+        'body > ul :is(li:not(:first-of-type) a:hover, li:not(:first-of-type).active a) {background: red;}';
+      expect(parse(pseudoClassPlugin, cssText))
+        .toEqual(`body > ul :is(li:not(:first-of-type) a:hover, li:not(:first-of-type).active a),
+body > ul :is(li:not(:first-of-type) a.\\:hover, li:not(:first-of-type).active a) {background: red;}`);
+    });
+
     it('should parse selector with comma nested inside ()', () => {
       const cssText =
         '[_nghost-ng-c4172599085]:not(.fit-content).aim-select:hover:not(:disabled, [_nghost-ng-c4172599085]:not(.fit-content).aim-select--disabled, [_nghost-ng-c4172599085]:not(.fit-content).aim-select--invalid, [_nghost-ng-c4172599085]:not(.fit-content).aim-select--active) { border-color: rgb(84, 84, 84); }';