Use public API in tests wherever possible (#9954)

* Use public API in tests wherever possible

* Add missing src/node_modules files

src/node_modules/react-art/index.js

@@ -0,0 +1,9 @@
+/**
+ * Copyright 2016-present Facebook. All Rights Reserved.
+ *
+ * @flow
+ */
+
+'use strict';
+
+module.exports = require('ReactARTFiber');

src/node_modules/react-dom/test-utils.js

@@ -0,0 +1,9 @@
+/**
+ * Copyright 2016-present Facebook. All Rights Reserved.
+ *
+ * @flow
+ */
+
+'use strict';
+
+module.exports = require('ReactTestUtils');

src/node_modules/react-native/index.js

@@ -0,0 +1,9 @@
+/**
+ * Copyright 2016-present Facebook. All Rights Reserved.
+ *
+ * @flow
+ */
+
+'use strict';
+
+module.exports = require('ReactNative');

src/node_modules/react-noop-renderer/index.js

@@ -0,0 +1,9 @@
+/**
+ * Copyright 2016-present Facebook. All Rights Reserved.
+ *
+ * @flow
+ */
+
+'use strict';
+
+module.exports = require('ReactNoop');

src/node_modules/react-test-renderer/shallow.js

@@ -0,0 +1,9 @@
+/**
+ * Copyright 2016-present Facebook. All Rights Reserved.
+ *
+ * @flow
+ */
+
+'use strict';
+
+module.exports = require('ReactShallowRenderer');