[Fiber] Add unit tests for ReactDOMFiber

src/renderers/dom/fiber/__tests__/ReactDOMFiber-test.js

@@ -0,0 +1,48 @@
+/**
+ * Copyright 2013-present, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ *
+ * @emails react-core
+ */
+
+'use strict';
+
+var React = require('React');
+var ReactDOMFiber = require('ReactDOMFiber');
+
+describe('ReactDOMFiber', () => {
+  var container;
+
+  beforeEach(() => {
+    // to supress a warning that ReactDOMFiber is an experimental renderer.
+    spyOn(console, 'error');
+    container = document.createElement('div');
+  });
+
+  it('should render a component returning strings directly from render', () => {
+    const Text = ({value}) => value;
+
+    ReactDOMFiber.render(
+      <Text value="foo" />,
+      container
+    );
+
+    expect(container.textContent).toEqual('foo');
+  });
+
+  it('should render a component returning numbers directly from render', () => {
+    const Text = ({value}) => value;
+
+    ReactDOMFiber.render(
+      <Text value={10} />,
+      container
+    );
+
+    expect(container.textContent).toEqual('10');
+  });
+
+});