SIP-32: Moving frontend code to the base of the repo (#9098)

* move assets out, get webpack dev working

* update docs to reference superset-frontend

* draw the rest of the owl

* fix docs

* fix webpack script

* rats

* correct docs

* fix tox dox

superset-frontend/spec/javascripts/explore/components/CheckboxControl_spec.jsx

@@ -0,0 +1,64 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+/* eslint-disable no-unused-expressions */
+import React from 'react';
+import sinon from 'sinon';
+import { shallow, mount } from 'enzyme';
+
+import CheckboxControl from '../../../../src/explore/components/controls/CheckboxControl';
+import ControlHeader from '../../../../src/explore/components/ControlHeader';
+import Checkbox from '../../../../src/components/Checkbox';
+
+const defaultProps = {
+  name: 'show_legend',
+  onChange: sinon.spy(),
+  value: false,
+  label: 'checkbox label',
+};
+
+describe('CheckboxControl', () => {
+  let wrapper;
+
+  beforeEach(() => {
+    wrapper = shallow(<CheckboxControl {...defaultProps} />);
+  });
+
+  it('renders a Checkbox', () => {
+    const controlHeader = wrapper.find(ControlHeader);
+    expect(controlHeader).toHaveLength(1);
+
+    const headerWrapper = controlHeader.shallow();
+    expect(headerWrapper.find(Checkbox)).toHaveLength(1);
+  });
+
+  it('Checks the box when the label is clicked', () => {
+    const fullComponent = mount(<CheckboxControl {...defaultProps} />);
+
+    const spy = sinon.spy(fullComponent.instance(), 'onChange');
+
+    fullComponent.instance().forceUpdate();
+
+    fullComponent
+      .find('label span')
+      .last()
+      .simulate('click');
+
+    expect(spy.calledOnce).toBe(true);
+  });
+});