From 427c4223488be5564de13c13d4daca85a83a9ad6 Mon Sep 17 00:00:00 2001
From: Alan Agius <alan.agius4@gmail.com>
Date: Thu, 10 Jun 2021 18:57:11 +0200
Subject: [PATCH] fix(@angular-devkit/build-angular): don't parse `new Worker`
 syntax when `webWorkerTsConfig` is not defined in karma builder

This is to retain version 11 behaviour.

Closes #21108

(cherry picked from commit 071c8d10ce347a8acb40833ef0b2480986625ab5)
---
 .../build_angular/src/webpack/configs/test.ts         | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/packages/angular_devkit/build_angular/src/webpack/configs/test.ts b/packages/angular_devkit/build_angular/src/webpack/configs/test.ts
index 09e7f4d654e7..266f859cddb3 100644
--- a/packages/angular_devkit/build_angular/src/webpack/configs/test.ts
+++ b/packages/angular_devkit/build_angular/src/webpack/configs/test.ts
@@ -16,7 +16,7 @@ export function getTestConfig(
   wco: WebpackConfigOptions<WebpackTestOptions>,
 ): webpack.Configuration {
   const {
-    buildOptions: { codeCoverage, codeCoverageExclude, main, sourceMap },
+    buildOptions: { codeCoverage, codeCoverageExclude, main, sourceMap, webWorkerTsConfig },
     root,
     sourceRoot,
   } = wco;
@@ -60,6 +60,15 @@ export function getTestConfig(
     },
     module: {
       rules: extraRules,
+      parser:
+        webWorkerTsConfig === undefined
+          ? undefined
+          : {
+              javascript: {
+                worker: false,
+                url: false,
+              },
+            },
     },
     plugins: extraPlugins,
     optimization: {