chore: update jest

Author: mdjastrzebski

package.json

@@ -37,19 +37,19 @@
     "@callstack/eslint-config": "^11.0.0",
     "@release-it/conventional-changelog": "^2.0.0",
     "@testing-library/jest-native": "~4.0.2",
-    "@types/jest": "^27.0.0",
+    "@types/jest": "^28.0.0",
     "@types/react": "^17.0.0",
     "@types/react-native": "^0.66.6",
     "@types/react-test-renderer": "^17.0.0",
-    "babel-jest": "^27.0.0",
+    "babel-jest": "^28.0.0",
     "conventional-changelog-cli": "^2.0.11",
     "cp-cli": "^2.0.0",
     "dedent": "^0.7.0",
     "del-cli": "^3.0.1",
     "eslint": "^7.32.0",
     "flow-bin": "~0.170.0",
     "flow-copy-source": "^2.0.9",
-    "jest": "^27.0.0",
+    "jest": "^28.0.0",
     "react": "^18.0.0",
     "react-native": "~0.69.1",
     "react-test-renderer": "^18.0.0",

src/helpers/timers.ts

@@ -2,6 +2,8 @@
 /* globals jest */
 const globalObj = typeof window === 'undefined' ? global : window;
 
+type FakeTimersTypes = 'modern' | 'legacy';
+
 // Currently this fn only supports jest timers, but it could support other test runners in the future.
 function runWithRealTimers<T>(callback: () => T): T {
   const fakeTimersType = getJestFakeTimersType();
@@ -12,13 +14,14 @@ function runWithRealTimers<T>(callback: () => T): T {
   const callbackReturnValue = callback();
 
   if (fakeTimersType) {
-    jest.useFakeTimers(fakeTimersType);
+    const fakeTimersConfig = getFakeTimersConfigFromType(fakeTimersType);
+    jest.useFakeTimers(fakeTimersConfig);
   }
 
   return callbackReturnValue;
 }
 
-function getJestFakeTimersType() {
+function getJestFakeTimersType(): FakeTimersTypes | null {
   // istanbul ignore if
   if (
     typeof jest === 'undefined' ||
@@ -49,9 +52,16 @@ function getJestFakeTimersType() {
       // not using Jest's modern fake timers
     }
   }
+
   return null;
 }
 
+function getFakeTimersConfigFromType(type: FakeTimersTypes) {
+  return type === 'legacy'
+    ? { legacyFakeTimers: true }
+    : { legacyFakeTimers: false };
+}
+
 const jestFakeTimersAreEnabled = (): boolean =>
   Boolean(getJestFakeTimersType());