Created tests for Paginator and SearchBar

test/short-urls/SearchBar.test.js

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+import React from 'react';
+import { shallow } from 'enzyme';
+import sinon from 'sinon';
+import { SearchBarComponent } from '../../src/short-urls/SearchBar';
+import SearchField from '../../src/utils/SearchField';
+import Tag from '../../src/tags/helpers/Tag';
+
+describe('<SearchBar />', () => {
+  let wrapper;
+  const listShortUrlsMock = sinon.spy();
+
+  afterEach(() => {
+    listShortUrlsMock.resetHistory();
+
+    if (wrapper) {
+      wrapper.unmount();
+    }
+  });
+
+  it('renders a SearchField', () => {
+    wrapper = shallow(<SearchBarComponent shortUrlsListParams={{}} />);
+
+    expect(wrapper.find(SearchField)).toHaveLength(1);
+  });
+
+  it('renders no tags when the list of tags is empty', () => {
+    wrapper = shallow(<SearchBarComponent shortUrlsListParams={{}} />);
+
+    expect(wrapper.find(Tag)).toHaveLength(0);
+  });
+
+  it('renders the proper amount of tags', () => {
+    const tags = [ 'foo', 'bar', 'baz' ];
+
+    wrapper = shallow(<SearchBarComponent shortUrlsListParams={{ tags }} />);
+
+    expect(wrapper.find(Tag)).toHaveLength(tags.length);
+  });
+
+  it('updates short URLs list when search field changes', () => {
+    wrapper = shallow(<SearchBarComponent shortUrlsListParams={{}} listShortUrls={listShortUrlsMock} />);
+    const searchField = wrapper.find(SearchField);
+
+    expect(listShortUrlsMock.callCount).toEqual(0);
+    searchField.simulate('change');
+    expect(listShortUrlsMock.callCount).toEqual(1);
+  });
+
+  it('updates short URLs list when a tag is removed', () => {
+    wrapper = shallow(
+      <SearchBarComponent shortUrlsListParams={{ tags: [ 'foo' ] }} listShortUrls={listShortUrlsMock} />
+    );
+    const tag = wrapper.find(Tag).first();
+
+    expect(listShortUrlsMock.callCount).toEqual(0);
+    tag.simulate('close');
+    expect(listShortUrlsMock.callCount).toEqual(1);
+  });
+});