[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/actions_spec.js

@@ -0,0 +1,39 @@
+import { it, describe } from 'mocha';
+import { expect } from 'chai';
+import sinon from 'sinon';
+import $ from 'jquery';
+import * as actions from '../../../javascripts/explore/actions/exploreActions';
+import * as exploreUtils from '../../../javascripts/explore/exploreUtils';
+import { defaultState } from '../../../javascripts/explore/stores/store';
+import { exploreReducer } from '../../../javascripts/explore/reducers/exploreReducer';
+
+describe('reducers', () => {
+  it('sets correct control value given a key and value', () => {
+    const newState = exploreReducer(
+      defaultState, actions.setControlValue('x_axis_label', 'x', []));
+    expect(newState.controls.x_axis_label.value).to.equal('x');
+  });
+  it('setControlValue works as expected with a checkbox', () => {
+    const newState = exploreReducer(defaultState,
+      actions.setControlValue('show_legend', true, []));
+    expect(newState.controls.show_legend.value).to.equal(true);
+  });
+});
+
+describe('runQuery', () => {
+  it('should handle query timeout', () => {
+    const dispatch = sinon.spy();
+    const urlStub = sinon.stub(exploreUtils, 'getExploreUrl').callsFake(() => ('mockURL'));
+    const ajaxStub = sinon.stub($, 'ajax');
+    ajaxStub.yieldsTo('error', { statusText: 'timeout' });
+
+    const request = actions.runQuery({});
+    request(dispatch);
+
+    expect(dispatch.callCount).to.equal(2);
+    expect(dispatch.args[0][0].type).to.equal(actions.CHART_UPDATE_TIMEOUT);
+
+    urlStub.restore();
+    ajaxStub.restore();
+  });
+});