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/sqllab/Timer_spec.jsx

@@ -0,0 +1,75 @@
+/**
+ * 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.
+ */
+import React from 'react';
+import { mount } from 'enzyme';
+import sinon from 'sinon';
+
+import Timer from '../../../src/components/Timer';
+import { now } from '../../../src/modules/dates';
+
+describe('Timer', () => {
+  let wrapper;
+  let clock;
+  const mockedProps = {
+    endTime: null,
+    isRunning: true,
+    status: 'warning',
+  };
+
+  beforeEach(() => {
+    clock = sinon.useFakeTimers();
+    mockedProps.startTime = now() + 1;
+    wrapper = mount(<Timer {...mockedProps} />);
+  });
+  afterEach(() => {
+    clock.restore();
+  });
+
+  it('is a valid element', () => {
+    expect(React.isValidElement(<Timer {...mockedProps} />)).toBe(true);
+  });
+
+  it('componentWillMount starts timer after 30ms and sets state.clockStr', () => {
+    expect(wrapper.state().clockStr).toBe('');
+    clock.tick(31);
+    expect(wrapper.state().clockStr).not.toBe('');
+  });
+
+  it('calls startTimer on mount', () => {
+    // Timer is already mounted in beforeEach
+    wrapper.unmount();
+    const startTimerSpy = sinon.spy(Timer.prototype, 'startTimer');
+    wrapper.mount();
+    // Timer is started once in willUnmount and a second timer in render
+    // TODO: Questionable whether this is necessary.
+    expect(startTimerSpy.callCount).toBe(2);
+    startTimerSpy.restore();
+  });
+
+  it('calls stopTimer on unmount', () => {
+    const stopTimerSpy = sinon.spy(Timer.prototype, 'stopTimer');
+    wrapper.unmount();
+    expect(stopTimerSpy.callCount).toBe(1);
+    stopTimerSpy.restore();
+  });
+
+  it('renders a span with the correct class', () => {
+    expect(wrapper.find('span').hasClass('label-warning')).toBe(true);
+  });
+});