Created tests for Paginator and SearchBar

test/short-urls/Paginator.test.js

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+import React from 'react';
+import { shallow } from 'enzyme';
+import { PaginationItem } from 'reactstrap';
+import Paginator from '../../src/short-urls/Paginator';
+
+describe('<Paginator />', () => {
+  let wrapper;
+
+  afterEach(() => {
+    if (wrapper) {
+      wrapper.unmount();
+    }
+  });
+
+  it('renders nothing if the number of pages is below 2', () => {
+    wrapper = shallow(<Paginator serverId="abc123" />);
+    expect(wrapper.text()).toEqual('');
+  });
+
+  it('renders previous, next and the list of pages', () => {
+    const paginator = {
+      currentPage: 1,
+      pagesCount: 5,
+    };
+    const extraPagesPrevNext = 2;
+    const expectedItems = paginator.pagesCount + extraPagesPrevNext;
+
+    wrapper = shallow(<Paginator serverId="abc123" paginator={paginator} />);
+
+    expect(wrapper.find(PaginationItem)).toHaveLength(expectedItems);
+  });
+});