feat: Enable "missing act" warnings in React 18 by default

Author: eps1lon

src/index.js

@@ -22,4 +22,15 @@ if (typeof process === 'undefined' || !process.env?.RTL_SKIP_AUTO_CLEANUP) {
   }
 }
 
+// This matches the behavior of React < 18.
+if (typeof beforeAll === 'function' && typeof afterAll === 'function') {
+  beforeAll(() => {
+    global.IS_REACT_ACT_ENVIRONMENT = true
+  })
+
+  afterAll(() => {
+    global.IS_REACT_ACT_ENVIRONMENT = false
+  })
+}
+
 export * from './pure'

tests/setup-env.js

@@ -1,9 +1 @@
 import '@testing-library/jest-dom/extend-expect'
-
-beforeEach(() => {
-  global.IS_REACT_ACT_ENVIRONMENT = true
-})
-
-afterEach(() => {
-  global.IS_REACT_ACT_ENVIRONMENT = false
-})