Explore: adds basic tests to TableContainer checking the render and output on 0 series returned

public/app/features/explore/TableContainer.test.tsx

+import React from 'react';
+import { shallow, render } from 'enzyme';
+import { TableContainer } from './TableContainer';
+import { DataFrame } from '@grafana/data';
+import { toggleTable } from './state/actions';
+import { ExploreId } from 'app/types/explore';
+
+describe('TableContainer', () => {
+  it('should render component', () => {
+    const props = {
+      exploreId: ExploreId.left as ExploreId,
+      loading: false,
+      width: 800,
+      onClickCell: jest.fn(),
+      showingTable: true,
+      tableResult: {} as DataFrame,
+      toggleTable: {} as typeof toggleTable,
+    };
+
+    const wrapper = shallow(<TableContainer {...props} />);
+    expect(wrapper).toMatchSnapshot();
+  });
+
+  it('should render 0 series returned on no items', () => {
+    const props = {
+      exploreId: ExploreId.left as ExploreId,
+      loading: false,
+      width: 800,
+      onClickCell: jest.fn(),
+      showingTable: true,
+      tableResult: {
+        name: 'TableResultName',
+        fields: [],
+        length: 0,
+      } as DataFrame,
+      toggleTable: {} as typeof toggleTable,
+    };
+
+    const wrapper = render(<TableContainer {...props} />);
+    expect(wrapper.find('0 series returned')).toBeTruthy();
+  });
+});

public/app/features/explore/__snapshots__/TableContainer.test.tsx.snap

+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`TableContainer should render component 1`] = `
+<Collapse
+  collapsible={true}
+  isOpen={true}
+  label="Table"
+  loading={false}
+  onToggle={[Function]}
+>
+  <Component
+    metaItems={
+      Array [
+        Object {
+          "value": "0 series returned",
+        },
+      ]
+    }
+  />
+</Collapse>
+`;