basic-unit-test.test.js

/* src/__tests__/helpers/index.test.js: */
import { isEarlierThanNow } from '../../helpers';

test('isEarlierThanNow, given a timestamp earlier than now, retruns true', () => {
  // Arrange
  const date = new Date('1/1/2000');

  // Act
  const actualIsEarlierDateThanNow = isEarlierThanNow(date);

  // Assert
  expect(actualIsEarlierDateThanNow).toEqual(true);
});

test('isEarlierThanNow, given a timestamp greater than now, returns false', () => {
  // Arrange
  const date = new Date('1/1/2060');

  // Act
  const actualIsEarlierDateThanNow = isEarlierThanNow(date);

  // Assert
  expect(actualIsEarlierDateThanNow).toEqual(false);
});

test('isEarlierThanNow, given a timestamp equal to now, returns false', () => {
  // Arrange
  const date = Date.now();

  // Act
  const actualIsEarlierDateThanNow = isEarlierThanNow(date);

  // Assert
  expect(actualIsEarlierDateThanNow).toEqual(false);
});