Run ReactElementJSX-test against bundles

Author: gaearon

packages/react/src/__tests__/ReactElementJSX-test.internal.js renamed to packages/react/src/__tests__/ReactElementJSX-test.js

@@ -13,8 +13,6 @@ let React;
 let ReactDOM;
 let ReactTestUtils;
 
-let ReactFeatureFlags = require('shared/ReactFeatureFlags');
-
 // NOTE: We're explicitly not using JSX here. This is intended to test
 // a new React.jsx api which does not have a JSX transformer yet.
 // A lot of these tests are pulled from ReactElement-test because
@@ -30,9 +28,6 @@ describe('ReactElement.jsx', () => {
     originalSymbol = global.Symbol;
     global.Symbol = undefined;
 
-    ReactFeatureFlags = require('shared/ReactFeatureFlags');
-    ReactFeatureFlags.warnAboutSpreadingKeyToJSX = true;
-
     React = require('react');
     ReactDOM = require('react-dom');
     ReactTestUtils = require('react-dom/test-utils');
@@ -356,27 +351,6 @@ describe('ReactElement.jsx', () => {
     );
   });
 
-  it('should warn when keys are passed as part of props', () => {
-    const container = document.createElement('div');
-    class Child extends React.Component {
-      render() {
-        return React.jsx('div', {});
-      }
-    }
-    class Parent extends React.Component {
-      render() {
-        return React.jsx('div', {
-          children: [React.jsx(Child, {key: '0'})],
-        });
-      }
-    }
-    expect(() => ReactDOM.render(React.jsx(Parent, {}), container)).toErrorDev(
-      'Warning: React.jsx: Spreading a key to JSX is a deprecated pattern. ' +
-        'Explicitly pass a key after spreading props in your JSX call. ' +
-        'E.g. <Child {...props} key={key} />',
-    );
-  });
-
   it('should not warn when unkeyed children are passed to jsxs', () => {
     const container = document.createElement('div');
     class Child extends React.Component {

packages/react/src/__tests__/ReactElementJSXNewWarnings-test.internal.js

@@ -0,0 +1,68 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @emails react-core
+ */
+
+'use strict';
+
+let React;
+let ReactDOM;
+
+let ReactFeatureFlags = require('shared/ReactFeatureFlags');
+
+// NOTE: We're explicitly not using JSX here. This is intended to test
+// a new React.jsx api which does not have a JSX transformer yet.
+// A lot of these tests are pulled from ReactElement-test because
+// this api is meant to be backwards compatible.
+describe('ReactElementJSXNewWarnings', () => {
+  let originalSymbol;
+
+  beforeEach(() => {
+    jest.resetModules();
+
+    // Delete the native Symbol if we have one to ensure we test the
+    // unpolyfilled environment.
+    originalSymbol = global.Symbol;
+    global.Symbol = undefined;
+
+    ReactFeatureFlags = require('shared/ReactFeatureFlags');
+    ReactFeatureFlags.warnAboutSpreadingKeyToJSX = true;
+
+    React = require('react');
+    ReactDOM = require('react-dom');
+  });
+
+  afterEach(() => {
+    global.Symbol = originalSymbol;
+  });
+
+  if (!__EXPERIMENTAL__) {
+    it("empty test so Jest doesn't complain", () => {});
+    return;
+  }
+
+  it('should warn when keys are passed as part of props', () => {
+    const container = document.createElement('div');
+    class Child extends React.Component {
+      render() {
+        return React.jsx('div', {});
+      }
+    }
+    class Parent extends React.Component {
+      render() {
+        return React.jsx('div', {
+          children: [React.jsx(Child, {key: '0'})],
+        });
+      }
+    }
+    expect(() => ReactDOM.render(React.jsx(Parent, {}), container)).toErrorDev(
+      'Warning: React.jsx: Spreading a key to JSX is a deprecated pattern. ' +
+        'Explicitly pass a key after spreading props in your JSX call. ' +
+        'E.g. <Child {...props} key={key} />',
+    );
+  });
+});