fix(material/core): sanity checks not disabled for node-based test environments

In #23374 we expanded the logic that checks for test environments to cover Jest and Mocha. The problem is that we were checking against the `window` which won't work in a Node environment, because the global variables are attached to the `global` object, not the `window`, even though there may be a fake `window` declared by the test tooling.

These changes resolve the issue by first checking against `global` before falling back to `window`.

Fixes #23365.

Author: crisbeto

src/cdk/a11y/focus-monitor/focus-monitor.ts

@@ -99,10 +99,10 @@ export class FocusMonitor implements OnDestroy {
   private _windowFocused = false;
 
   /** The timeout id of the window focus timeout. */
-  private _windowFocusTimeoutId: number;
+  private _windowFocusTimeoutId: any;
 
   /** The timeout id of the origin clearing timeout. */
-  private _originTimeoutId: number;
+  private _originTimeoutId: any;
 
   /**
    * Whether the origin was determined via a touch interaction. Necessary as properly attributing

src/cdk/a11y/live-announcer/live-announcer.ts

@@ -31,7 +31,7 @@ import {
 export class LiveAnnouncer implements OnDestroy {
   private _liveElement: HTMLElement;
   private _document: Document;
-  private _previousTimeout?: number;
+  private _previousTimeout: any;
 
   constructor(
       @Optional() @Inject(LIVE_ANNOUNCER_ELEMENT_TOKEN) elementToken: any,

src/cdk/platform/BUILD.bazel

@@ -11,6 +11,7 @@ ng_module(
     deps = [
         "@npm//@angular/common",
         "@npm//@angular/core",
+        "@npm//@types/node",
     ],
 )
 

src/cdk/platform/features/test-environment.ts

@@ -17,7 +17,17 @@ declare interface TestGlobals {
   Mocha: unknown;
 }
 
-const testGlobals = (typeof window !== 'undefined' ? window : {}) as {} as TestGlobals;
+let testGlobals: 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 as {} as TestGlobals;
+} else if (typeof window !== 'undefined') {
+  testGlobals = window as {} as TestGlobals;
+} else {
+  testGlobals = {} as TestGlobals;
+}
 
 /** Gets whether the code is currently running in a test environment. */
 export function _isTestEnvironment(): boolean {

src/cdk/tsconfig-tests.json

@@ -12,7 +12,7 @@
     "importHelpers": false,
     "module": "umd",
     "target": "es5",
-    "types": ["jasmine"],
+    "types": ["jasmine", "node"],
     "experimentalDecorators": true,
     "emitDecoratorMetadata": true,
     "paths": {