feat: add polyfill for TextEncoder

fixes #1914
fixes #2514

Author: ahnpnl

setup-jest.js

@@ -1,11 +1,18 @@
 require('zone.js');
 require('zone.js/testing');
+const { TextEncoder, TextDecoder } = require('util');
+
 const { getTestBed } = require('@angular/core/testing');
 const {
     BrowserDynamicTestingModule,
     platformBrowserDynamicTesting,
 } = require('@angular/platform-browser-dynamic/testing');
 
+if (typeof globalThis.TextEncoder === 'undefined') {
+    globalThis.TextEncoder = TextEncoder;
+    globalThis.TextDecoder = TextDecoder;
+}
+
 const testEnvironmentOptions = globalThis.ngJest?.testEnvironmentOptions ?? Object.create(null);
 
 getTestBed().initTestEnvironment(BrowserDynamicTestingModule, platformBrowserDynamicTesting(), testEnvironmentOptions);

setup-jest.mjs

@@ -2,6 +2,12 @@ import 'zone.js';
 import 'zone.js/testing';
 import { getTestBed } from '@angular/core/testing';
 import { BrowserDynamicTestingModule, platformBrowserDynamicTesting } from '@angular/platform-browser-dynamic/testing';
+import { TextEncoder, TextDecoder } from 'util';
+
+if (typeof globalThis.TextEncoder === 'undefined') {
+    globalThis.TextEncoder = TextEncoder;
+    globalThis.TextDecoder = TextDecoder;
+}
 
 const testEnvironmentOptions = globalThis.ngJest?.testEnvironmentOptions ?? Object.create(null);
 

src/config/setup-jest.spec.ts

@@ -47,6 +47,7 @@ describe('setup-jest', () => {
 
     beforeEach(() => {
         delete globalThis.ngJest;
+        delete globalThis.TextEncoder;
         jest.clearAllMocks();
         jest.resetModules();
     });
@@ -78,6 +79,12 @@ describe('setup-jest', () => {
                 errorOnUnknownProperties: true,
             });
         });
+
+        test('should always have TextEncoder in globalThis', async () => {
+            await import('../../setup-jest');
+
+            expect(globalThis.TextEncoder).toBeDefined();
+        });
     });
 
     describe('for ESM setup-jest, test environment initialization', () => {
@@ -107,5 +114,11 @@ describe('setup-jest', () => {
                 errorOnUnknownProperties: true,
             });
         });
+
+        test('should always have TextEncoder in globalThis', async () => {
+            await import('../../setup-jest.mjs');
+
+            expect(globalThis.TextEncoder).toBeDefined();
+        });
     });
 });