feat: add all available globals to test globals, not just explicit ones (#12642)

Author: SimenB

CHANGELOG.md

@@ -24,6 +24,7 @@
 - `[jest-environment-node]` [**BREAKING**] Add default `node` and `node-addon` conditions to `exportConditions` for `node` environment ([#11924](https://github.com/facebook/jest/pull/11924))
 - `[jest-environment-node]` [**BREAKING**] Pass global config to Jest environment constructor for `node` environment ([#12461](https://github.com/facebook/jest/pull/12461))
 - `[jest-environment-node]` [**BREAKING**] Second argument `context` to constructor is mandatory ([#12469](https://github.com/facebook/jest/pull/12469))
+- `[jest-environment-node]` Add all available globals to test globals, not just explicit ones ([#12642](https://github.com/facebook/jest/pull/12642))
 - `[@jest/expect]` New module which extends `expect` with `jest-snapshot` matchers ([#12404](https://github.com/facebook/jest/pull/12404), [#12410](https://github.com/facebook/jest/pull/12410), [#12418](https://github.com/facebook/jest/pull/12418))
 - `[@jest/expect-utils]` New module exporting utils for `expect` ([#12323](https://github.com/facebook/jest/pull/12323))
 - `[@jest/fake-timers]` [**BREAKING**] Rename `timers` configuration option to `fakeTimers` ([#12572](https://github.com/facebook/jest/pull/12572))

packages/jest-environment-jsdom/src/index.ts

@@ -111,16 +111,14 @@ export default class JSDOMEnvironment implements JestEnvironment<number> {
 
     this.moduleMocker = new ModuleMocker(global as any);
 
-    const timerConfig = {
-      idToRef: (id: number) => id,
-      refToId: (ref: number) => ref,
-    };
-
     this.fakeTimers = new LegacyFakeTimers({
       config: projectConfig,
       global: global as unknown as typeof globalThis,
       moduleMocker: this.moduleMocker,
-      timerConfig,
+      timerConfig: {
+        idToRef: (id: number) => id,
+        refToId: (ref: number) => ref,
+      },
     });
 
     this.fakeTimersModern = new ModernFakeTimers({

packages/jest-environment-node/src/index.ts

@@ -22,6 +22,22 @@ type Timer = {
   unref: () => Timer;
 };
 
+// some globals we do not want, either because deprecated or we set it ourselves
+const denyList = new Set([
+  'GLOBAL',
+  'root',
+  'global',
+  'Buffer',
+  'ArrayBuffer',
+  'Uint8Array',
+]);
+
+const nodeGlobals = new Set(
+  Object.getOwnPropertyNames(globalThis).filter(
+    global => !denyList.has(global),
+  ),
+);
+
 export default class NodeEnvironment implements JestEnvironment<Timer> {
   context: Context | null;
   fakeTimers: LegacyFakeTimers<Timer> | null;
@@ -37,70 +53,23 @@ export default class NodeEnvironment implements JestEnvironment<Timer> {
       'this',
       Object.assign(this.context, projectConfig.testEnvironmentOptions),
     ));
+
+    const contextGlobals = new Set(Object.getOwnPropertyNames(global));
+    for (const nodeGlobalsKey of nodeGlobals) {
+      if (!contextGlobals.has(nodeGlobalsKey)) {
+        // @ts-expect-error
+        global[nodeGlobalsKey] = globalThis[nodeGlobalsKey];
+      }
+    }
+
     global.global = global;
-    global.clearInterval = clearInterval;
-    global.clearTimeout = clearTimeout;
-    global.setInterval = setInterval;
-    global.setTimeout = setTimeout;
     global.Buffer = Buffer;
-    global.setImmediate = setImmediate;
-    global.clearImmediate = clearImmediate;
     global.ArrayBuffer = ArrayBuffer;
     // TextEncoder (global or via 'util') references a Uint8Array constructor
     // different than the global one used by users in tests. This makes sure the
     // same constructor is referenced by both.
     global.Uint8Array = Uint8Array;
 
-    // URL and URLSearchParams are global in Node >= 10
-    global.URL = URL;
-    global.URLSearchParams = URLSearchParams;
-
-    // TextDecoder and TextDecoder are global in Node >= 11
-    global.TextEncoder = TextEncoder;
-    global.TextDecoder = TextDecoder;
-
-    // queueMicrotask is global in Node >= 11
-    global.queueMicrotask = queueMicrotask;
-
-    // AbortController is global in Node >= 15
-    if (typeof AbortController !== 'undefined') {
-      global.AbortController = AbortController;
-    }
-    // AbortSignal is global in Node >= 15
-    if (typeof AbortSignal !== 'undefined') {
-      global.AbortSignal = AbortSignal;
-    }
-    // Event is global in Node >= 15.4
-    if (typeof Event !== 'undefined') {
-      global.Event = Event;
-    }
-    // EventTarget is global in Node >= 15.4
-    if (typeof EventTarget !== 'undefined') {
-      global.EventTarget = EventTarget;
-    }
-    // MessageChannel is global in Node >= 15
-    if (typeof MessageChannel !== 'undefined') {
-      global.MessageChannel = MessageChannel;
-    }
-    // MessageEvent is global in Node >= 15
-    if (typeof MessageEvent !== 'undefined') {
-      global.MessageEvent = MessageEvent;
-    }
-    // performance is global in Node >= 16
-    if (typeof performance !== 'undefined') {
-      global.performance = performance;
-    }
-    // atob and btoa are global in Node >= 16
-    if (typeof atob !== 'undefined' && typeof btoa !== 'undefined') {
-      global.atob = atob;
-      global.btoa = btoa;
-    }
-    // structuredClone is global in Node >= 17
-    // @ts-expect-error type definition for structuredClone is missing
-    if (typeof structuredClone !== 'undefined') {
-      // @ts-expect-error type definition for structuredClone is missing
-      global.structuredClone = structuredClone;
-    }
     installCommonGlobals(global, projectConfig.globals);
 
     this.moduleMocker = new ModuleMocker(global);
@@ -118,16 +87,14 @@ export default class NodeEnvironment implements JestEnvironment<Timer> {
     const timerRefToId = (timer: Timer): number | undefined =>
       (timer && timer.id) || undefined;
 
-    const timerConfig = {
-      idToRef: timerIdToRef,
-      refToId: timerRefToId,
-    };
-
     this.fakeTimers = new LegacyFakeTimers({
       config: projectConfig,
       global,
       moduleMocker: this.moduleMocker,
-      timerConfig,
+      timerConfig: {
+        idToRef: timerIdToRef,
+        refToId: timerRefToId,
+      },
     });
 
     this.fakeTimersModern = new ModernFakeTimers({