Explore: adds MetaInfoText tests

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

+import React from 'react';
+import { shallow, render } from 'enzyme';
+import { MetaInfoText, MetaItemProps } from './MetaInfoText';
+describe('MetaInfoText', () => {
+  it('should render component', () => {
+    const items: MetaItemProps[] = [
+      { label: 'label', value: 'value' },
+      { label: 'label2', value: 'value2' },
+    ];
+    const wrapper = shallow(<MetaInfoText metaItems={items} />);
+    expect(wrapper).toMatchSnapshot();
+  });
+
+  it('should render items', () => {
+    const items: MetaItemProps[] = [
+      { label: 'label', value: 'value' },
+      { label: 'label2', value: 'value2' },
+    ];
+
+    const wrapper = render(<MetaInfoText metaItems={items} />);
+    expect(wrapper.find('label')).toBeTruthy();
+    expect(wrapper.find('value')).toBeTruthy();
+    expect(wrapper.find('label2')).toBeTruthy();
+    expect(wrapper.find('value2')).toBeTruthy();
+  });
+
+  it('should render no items when the array is empty', () => {
+    const items: MetaItemProps[] = [];
+
+    const wrapper = shallow(<MetaInfoText metaItems={items} />);
+    expect(wrapper.find('div').exists()).toBeTruthy();
+    expect(wrapper.find('div').children()).toHaveLength(0);
+  });
+});

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

+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`MetaInfoText should render component 1`] = `
+<div
+  className="css-mi7ebz"
+>
+  <Component
+    key="0-label"
+    label="label"
+    value="value"
+  />
+  <Component
+    key="1-label2"
+    label="label2"
+    value="value2"
+  />
+</div>
+`;