fix(ivy): add polyfill for goog.getMsg to unblock tests (FW-663) (#27218)

PR Close #27218

packages/private/testing/src/goog_get_msg.ts

@@ -0,0 +1,25 @@
+/**
+ * @license
+ * Copyright Google Inc. 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
+ */
+
+/**
+ * A method that injects goog.getMsg-like function into global scope.
+ *
+ * This method is required as a *temporary* measure to prevent i18n tests from being blocked while
+ * running outside of Closure Compiler. This method will not be needed once runtime translation
+ * service support is introduced.
+ */
+export function polyfillGoogGetMsg(): void {
+  const glob = (global as any);
+  glob.goog = glob.goog || {};
+  glob.goog.getMsg =
+      glob.goog.getMsg || function(input: string, placeholders: {[key: string]: string} = {}) {
+        return Object.keys(placeholders).length ?
+            input.replace(/\{\$(.*?)\}/g, (match, key) => placeholders[key] || '') :
+            input;
+      };
+}