test(service-worker): make mock implementations more similar to actual ones (#37922)

This commit makes the mock implementations used is ServiceWorker tests
behave more similar to the actual ones.

PR Close #37922

packages/service-worker/worker/testing/utils.ts

@@ -0,0 +1,43 @@
+/**
+ * @license
+ * Copyright Google LLC All Rights Reserved.
+ *
+ * Use of this source code is governed by an MIT-style license that can be
+ * found in the LICENSE file at https://angular.io/license
+ */
+
+/**
+ * Get a normalized representation of a URL relative to a provided base URL.
+ *
+ * More specifically:
+ * 1. Resolve the URL relative to the provided base URL.
+ * 2. If the URL is relative to the base URL, then strip the origin (and only return the path and
+ *    search parts). Otherwise, return the full URL.
+ *
+ * @param url The raw URL.
+ * @param relativeTo The base URL to resolve `url` relative to.
+ *     (This is usually the ServiceWorker's origin or registration scope).
+ * @return A normalized representation of the URL.
+ */
+export function normalizeUrl(url: string, relativeTo: string): string {
+  const {origin, path, search} = parseUrl(url, relativeTo);
+  const {origin: relativeToOrigin} = parseUrl(relativeTo);
+
+  return (origin === relativeToOrigin) ? path + search : url;
+}
+
+/**
+ * Parse a URL into its different parts, such as `origin`, `path` and `search`.
+ */
+export function parseUrl(
+    url: string, relativeTo?: string): {origin: string, path: string, search: string} {
+  const parsedUrl: URL = (typeof URL === 'function') ?
+      (!relativeTo ? new URL(url) : new URL(url, relativeTo)) :
+      require('url').parse(require('url').resolve(relativeTo || '', url));
+
+  return {
+    origin: parsedUrl.origin || `${parsedUrl.protocol}//${parsedUrl.host}`,
+    path: parsedUrl.pathname,
+    search: parsedUrl.search || '',
+  };
+}