[js-testing] more tests for SelectControl (#2877)

* rename spec folder

* remove special handling for viz_type control since it now uses VizTypeControl

* add test for getOptions

* linting

* add test for cwp

* linting

superset/assets/spec/javascripts/explore/components/DisplayQueryButton_spec.jsx

@@ -0,0 +1,30 @@
+import React from 'react';
+import { expect } from 'chai';
+import { describe, it } from 'mocha';
+import { mount } from 'enzyme';
+import { Modal } from 'react-bootstrap';
+import ModalTrigger from './../../../../javascripts/components/ModalTrigger';
+
+import DisplayQueryButton from '../../../../javascripts/explore/components/DisplayQueryButton';
+
+describe('DisplayQueryButton', () => {
+  const defaultProps = {
+    animation: false,
+    queryResponse: {
+      query: 'SELECT * FROM foo',
+      language: 'sql',
+    },
+    chartStatus: 'success',
+    queryEndpoint: 'localhost',
+  };
+
+  it('is valid', () => {
+    expect(React.isValidElement(<DisplayQueryButton {...defaultProps} />)).to.equal(true);
+  });
+  it('renders a button and a modal', () => {
+    const wrapper = mount(<DisplayQueryButton {...defaultProps} />);
+    expect(wrapper.find(ModalTrigger)).to.have.lengthOf(1);
+    wrapper.find('.modal-trigger').simulate('click');
+    expect(wrapper.find(Modal)).to.have.lengthOf(1);
+  });
+});