Index: trip-planner-front/node_modules/@angular/cdk/esm2015/platform/features/test-environment.js
===================================================================
--- trip-planner-front/node_modules/@angular/cdk/esm2015/platform/features/test-environment.js	(revision 6a3a178323fd905112b5392bd9d3cb83b66ef2d3)
+++ trip-planner-front/node_modules/@angular/cdk/esm2015/platform/features/test-environment.js	(revision e29cc2ea91f8c99a4329f6d20188305dfd752279)
@@ -6,22 +6,19 @@
  * found in the LICENSE file at https://angular.io/license
  */
-let testGlobals;
-// We check the Node-specific `global` first, because tools tend to add a fake
-// `window` in Node environments which won't actually receive global variables.
-if (typeof global !== 'undefined') {
-    testGlobals = global;
-}
-else if (typeof window !== 'undefined') {
-    testGlobals = window;
-}
-else {
-    testGlobals = {};
-}
 /** Gets whether the code is currently running in a test environment. */
 export function _isTestEnvironment() {
-    return (typeof testGlobals.__karma__ !== 'undefined' && !!testGlobals.__karma__) ||
-        (typeof testGlobals.jasmine !== 'undefined' && !!testGlobals.jasmine) ||
-        (typeof testGlobals.jest !== 'undefined' && !!testGlobals.jest) ||
-        (typeof testGlobals.Mocha !== 'undefined' && !!testGlobals.Mocha);
+    // We can't use `declare const` because it causes conflicts inside Google with the real typings
+    // for these symbols and we can't read them off the global object, because they don't appear to
+    // be attached there for some runners like Jest.
+    // (see: https://github.com/angular/components/issues/23365#issuecomment-938146643)
+    return (
+    // @ts-ignore
+    (typeof __karma__ !== 'undefined' && !!__karma__) ||
+        // @ts-ignore
+        (typeof jasmine !== 'undefined' && !!jasmine) ||
+        // @ts-ignore
+        (typeof jest !== 'undefined' && !!jest) ||
+        // @ts-ignore
+        (typeof Mocha !== 'undefined' && !!Mocha));
 }
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