Created DateRangeRow test

test/utils/DateRangeRow.test.js

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+import React from 'react';
+import { shallow } from 'enzyme';
+import DateRangeRow from '../../src/utils/DateRangeRow';
+import DateInput from '../../src/utils/DateInput';
+
+describe('<DateRangeRow />', () => {
+  let wrapper;
+  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();
+  });
+});