pass through the displayName from the mocked component

jest/__mocks__/FakeComponent.js

@@ -0,0 +1 @@
+export default () => null

jest/__tests__/mockComponent-test.js

@@ -0,0 +1,13 @@
+const mockComponent = require('../mockComponent');
+const FakeComponent = require('FakeComponent')
+const TextInput = require('TextInput')
+
+it('defaults to a displayName of "Component" when the mocked component does not have one', () => {
+    expect(FakeComponent.displayName).toBeUndefined();
+    expect(mockComponent('FakeComponent').displayName).toBe('Component');
+});
+
+it('forwards the mocked component\'s displayName when available', () => {
+    expect(TextInput.displayName).toBe('TextInput');
+    expect(mockComponent('TextInput').displayName).toBe('TextInput');
+});

jest/mockComponent.js

@@ -17,7 +17,7 @@ module.exports = (moduleName, instanceMethods) => {
     typeof RealComponent === 'function' ? RealComponent : React.Component;
 
   const Component = class extends SuperClass {
-    static displayName = 'Component';
+    static displayName = SuperClass.displayName || 'Component';
 
     render() {
       const name =