feat(parse): Ignore comments around selectors (#441)

Fixes #391

package.json

@@ -25,7 +25,6 @@
         "build": "tsc",
         "prepare": "npm run build"
     },
-    "dependencies": {},
     "devDependencies": {
         "@types/jest": "^26.0.3",
         "@types/node": "^14.0.5",

src/parse.spec.ts

@@ -47,4 +47,15 @@ describe("Broken selectors", () => {
             expect(() => parse(selector)).toThrow(Error);
         });
     }
+
+    it("should ignore comments", () => {
+        expect(parse("/* comment1 */ /**/ foo /*comment2*/")).toEqual([
+            [
+                { type: "descendant" },
+                { name: "foo", namespace: null, type: "tag" },
+            ],
+        ]);
+
+        expect(() => parse("/*/")).toThrowError("Comment was not terminated");
+    });
 });

src/parse.ts

@@ -245,6 +245,17 @@ function parseSelector(
             tokens = [];
             sawWS = false;
             stripWhitespace(1);
+        } else if (
+            firstChar === "/" &&
+            selector.charAt(selectorIndex + 1) === "*"
+        ) {
+            const endIndex = selector.indexOf("*/", selectorIndex + 2);
+
+            if (endIndex < 0) {
+                throw new Error("Comment was not terminated");
+            }
+
+            selectorIndex = endIndex + 2;
         } else {
             if (sawWS) {
                 ensureNotTraversal();