build(aio): add tests for Firebase redirection (#21712)

PR Close #21712

aio/tools/firebase-test-utils/testFirebaseRedirection.spec.ts

@@ -0,0 +1,50 @@
+const { readFileSync } = require('fs');
+const path = require('canonical-path');
+const cjson = require('cjson');
+
+import { FirebaseRedirector, FirebaseRedirectConfig } from './FirebaseRedirector';
+
+
+describe('sitemap urls', () => {
+  loadSitemapUrls().forEach(url => {
+    it('should not redirect any urls in the sitemap', () => {
+      expect(getRedirector().redirect(url)).toEqual(url);
+    });
+  });
+});
+
+describe('redirected urls', () => {
+  loadLegacyUrls().forEach(urlPair => {
+    it('should redirect the legacy urls', () => {
+      const redirector = getRedirector();
+      expect(redirector.redirect(urlPair[0])).not.toEqual(urlPair[0]);
+      if (urlPair[1]) {
+        expect(redirector.redirect(urlPair[0])).toEqual(urlPair[1]);
+      }
+    });
+  });
+});
+
+function getRedirector() {
+  return new FirebaseRedirector(loadRedirects());
+}
+
+function loadRedirects(): FirebaseRedirectConfig[] {
+  const pathToFirebaseJSON = path.resolve(__dirname, '../../firebase.json');
+  const contents = cjson.load(pathToFirebaseJSON);
+  return contents.hosting.redirects;
+}
+
+function loadSitemapUrls() {
+  const pathToSiteMap = path.resolve(__dirname, '../../src/generated/sitemap.xml');
+  const xml = readFileSync(pathToSiteMap, 'utf8');
+  const urls: string[] = [];
+  xml.replace(/<loc>([^<]+)<\/loc>/g, (_, loc) => urls.push(loc.replace('%%DEPLOYMENT_HOST%%', '')));
+  return urls;
+}
+
+function loadLegacyUrls() {
+  const pathToLegacyUrls = path.resolve(__dirname, 'URLS_TO_REDIRECT.txt');
+  const urls = readFileSync(pathToLegacyUrls, 'utf8').split('\n').map(line => line.split('\t'));
+  return urls;
+}