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/welcome/DashboardTable_spec.jsx

@@ -0,0 +1,57 @@
+/**
+ * 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 thunk from 'redux-thunk';
+import configureStore from 'redux-mock-store';
+import fetchMock from 'fetch-mock';
+
+import ListView from 'src/components/ListView/ListView';
+import DashboardTable from 'src/welcome/DashboardTable';
+
+// store needed for withToasts(DashboardTable)
+const mockStore = configureStore([thunk]);
+const store = mockStore({});
+
+const dashboardsEndpoint = 'glob:*/api/v1/dashboard/*';
+const mockDashboards = [{ id: 1, url: 'url', dashboard_title: 'title' }];
+
+fetchMock.get(dashboardsEndpoint, { result: mockDashboards });
+
+function setup() {
+  // use mount because data fetching is triggered on mount
+  return mount(<DashboardTable />, { context: { store } });
+}
+
+describe('DashboardTable', () => {
+  beforeEach(fetchMock.resetHistory);
+
+  it('fetches dashboards and renders a ListView', done => {
+    const wrapper = setup();
+
+    setTimeout(() => {
+      expect(fetchMock.calls(dashboardsEndpoint)).toHaveLength(1);
+      // there's a delay between response and updating state, so manually set it
+      // rather than adding a timeout which could introduce flakiness
+      wrapper.setState({ dashaboards: mockDashboards });
+      expect(wrapper.find(ListView)).toHaveLength(1);
+      done();
+    });
+  });
+});