feat: add reactStrictMode option and override getConfig and configure functions from DTL

Author: yinm

src/config.js

@@ -0,0 +1,34 @@
+import {
+  getConfig as getConfigDTL,
+  configure as configureDTL,
+} from '@testing-library/dom'
+
+let configForRTL = {
+  reactStrictMode: false,
+}
+
+function getConfig() {
+  return {
+    ...getConfigDTL(),
+    ...configForRTL,
+  }
+}
+
+function configure(newConfig) {
+  if (typeof newConfig === 'function') {
+    // Pass the existing config out to the provided function
+    // and accept a delta in return
+    newConfig = newConfig(getConfig())
+  }
+
+  const {reactStrictMode, ...configForDTL} = newConfig
+
+  configureDTL(configForDTL)
+
+  configForRTL = {
+    ...configForRTL,
+    reactStrictMode,
+  }
+}
+
+export {getConfig, configure}

src/pure.js

@@ -11,6 +11,7 @@ import act, {
   setReactActEnvironment,
 } from './act-compat'
 import {fireEvent} from './fire-event'
+import {getConfig, configure} from './config'
 
 function jestFakeTimersAreEnabled() {
   /* istanbul ignore else */
@@ -276,6 +277,6 @@ function renderHook(renderCallback, options = {}) {
 
 // just re-export everything from dom-testing-library
 export * from '@testing-library/dom'
-export {render, renderHook, cleanup, act, fireEvent}
+export {render, renderHook, cleanup, act, fireEvent, getConfig, configure}
 
 /* eslint func-name-matching:0 */