[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/ChartContainer_spec.js

@@ -0,0 +1,22 @@
+// this test must be commented out because ChartContainer is now importing files
+// from visualizations/*.js which are also importing css files which breaks in the testing env
+
+// import React from 'react';
+// import { expect } from 'chai';
+// import { describe, it } from 'mocha';
+
+// import ChartContainer from '../../../../javascripts/explore/components/ChartContainer';
+
+// describe('ChartContainer', () => {
+//   const mockProps = {
+//     sliceName: 'Trend Line',
+//     vizType: 'line',
+//     height: '500px',
+//   };
+
+//   it('renders when vizType is line', () => {
+//     expect(
+//       React.isValidElement(<ChartContainer {...mockProps} />)
+//     ).to.equal(true);
+//   });
+// });