test: ✅ fix matchers typing issue due to ambient typing in observe.ts

Author: yjaaidi

libs/testing/src/observe.ts

@@ -1,6 +1,3 @@
-/// <reference types="vitest/globals" />
-/// <reference types="jest" />
-
 import type { Mock } from 'vitest';
 import { Observable, Unsubscribable } from 'rxjs';
 
@@ -65,3 +62,9 @@ function createSpy<PARAMS extends unknown[], RETURN>(): Mock<
     ? (jest.fn() as unknown as Mock<(...args: PARAMS) => RETURN>)
     : g.vi.fn();
 }
+
+declare global {
+  const jest: {
+    fn: () => Mock<(...args: unknown[]) => unknown>;
+  };
+}

libs/testing/tsconfig.json

@@ -8,7 +8,8 @@
     "noPropertyAccessFromIndexSignature": true,
     "noImplicitReturns": true,
     "noFallthroughCasesInSwitch": true,
-    "module": "preserve"
+    "module": "preserve",
+    "lib": ["esnext"]
   },
   "angularCompilerOptions": {
     "enableI18nLegacyMessageIdFormat": false,