Created new dropdown component to select relative or absolute date ranges

test/utils/dates/DateRangeRow.test.tsx

@@ -0,0 +1,39 @@
+import { shallow, ShallowWrapper } from 'enzyme';
+import DateRangeRow from '../../../src/utils/dates/DateRangeRow';
+import DateInput from '../../../src/utils/DateInput';
+
+describe('<DateRangeRow />', () => {
+  let wrapper: ShallowWrapper;
+  const onEndDateChange = jest.fn();
+  const onStartDateChange = jest.fn();
+
+  beforeEach(() => {
+    wrapper = shallow(<DateRangeRow onEndDateChange={onEndDateChange} onStartDateChange={onStartDateChange} />);
+  });
+  afterEach(() => {
+    wrapper.unmount();
+    jest.clearAllMocks();
+  });
+
+  it('renders two date inputs', () => {
+    const dateInput = wrapper.find(DateInput);
+
+    expect(dateInput).toHaveLength(2);
+  });
+
+  it('invokes start date callback when change event is triggered on first input', () => {
+    const dateInput = wrapper.find(DateInput).first();
+
+    expect(onStartDateChange).not.toHaveBeenCalled();
+    dateInput.simulate('change');
+    expect(onStartDateChange).toHaveBeenCalled();
+  });
+
+  it('invokes end date callback when change event is triggered on second input', () => {
+    const dateInput = wrapper.find(DateInput).last();
+
+    expect(onEndDateChange).not.toHaveBeenCalled();
+    dateInput.simulate('change');
+    expect(onEndDateChange).toHaveBeenCalled();
+  });
+});