Basic Ansible Environment Select Component

- Component conditionally renders based on # of virtual environments.
- User can add an Organization and associate it with a virtual environment.

__tests__/components/AnsibleEnvironmentSelect.test.jsx

@@ -0,0 +1,18 @@
+import React from 'react';
+import { mount } from 'enzyme';
+import AnsibleEnvironmentSelect from '../../src/components/AnsibleEnvironmentSelect';
+
+describe('<AnsibleEnvironmentSelect />', () => {
+  test('initially renders succesfully', async() => {
+    const wrapper = mount(<AnsibleEnvironmentSelect selected="foo" selectChange={() => {}} />);
+    wrapper.setState({ isHidden: false });
+  });
+  test('calls "onSelectChange" on dropdown select change', () => {
+    const spy = jest.spyOn(AnsibleEnvironmentSelect.prototype, 'onSelectChange');
+    const wrapper = mount(<AnsibleEnvironmentSelect selected="foo" selectChange={() => {}} />);
+    wrapper.setState({ isHidden: false });
+    expect(spy).not.toHaveBeenCalled();
+    wrapper.find('select').simulate('change');
+    expect(spy).toHaveBeenCalled();
+  });
+});