Created PaginationDropdown test

test/utils/PaginationDropdown.test.tsx

@@ -0,0 +1,35 @@
+import { shallow, ShallowWrapper } from 'enzyme';
+import { DropdownItem } from 'reactstrap';
+import PaginationDropdown from '../../src/utils/PaginationDropdown';
+
+describe('<PaginationDropdown />', () => {
+  const setValue = jest.fn();
+  let wrapper: ShallowWrapper;
+
+  beforeEach(() => {
+    wrapper = shallow(<PaginationDropdown ranges={[ 10, 50, 100, 200 ]} value={50} setValue={setValue} />);
+  });
+
+  afterEach(jest.clearAllMocks);
+  afterEach(() => wrapper?.unmount());
+
+  test('expected amount of items is rendered', () => {
+    const items = wrapper.find(DropdownItem);
+
+    expect(items).toHaveLength(6);
+  });
+
+  test.each([
+    [ 0, 10 ],
+    [ 1, 50 ],
+    [ 2, 100 ],
+    [ 3, 200 ],
+    [ 5, Infinity ],
+  ])('expected value is set when an item is clicked', (index, expectedValue) => {
+    const item = wrapper.find(DropdownItem).at(index);
+
+    expect(setValue).not.toHaveBeenCalled();
+    item.simulate('click');
+    expect(setValue).toHaveBeenCalledWith(expectedValue);
+  });
+});