PayCalculatorTest.java

import org.junit.Test;

import static org.junit.Assert.assertEquals;
import static payroll.PayCalculator.calculate;

public class PayCalculatorTest {
  private void assertPay(double expectedPay, double actualPay) {
    assertEquals(expectedPay, actualPay, .001);
  }

  @Test
  public void ZeroHours_ShouldBeZero() throws Exception {
    assertPay(0.0, calculate(0, 10, true));
    assertPay(0.0, calculate(0, 10, false));
  }

  @Test(expected = RuntimeException.class)
  public void LessThanZeroHours_ShouldThrow() throws Exception {
    calculate(-1, 10, true);
  }

  @Test(expected = RuntimeException.class)
  public void MoreThan80Hours_ShouldThrow() throws Exception {
    calculate(81, 10, true);
  }

  @Test
  public void FortyHours_StraightTime() throws Exception {
    assertPay(400.0, calculate(40, 10, true));
    assertPay(400.0, calculate(40, 10, false));
  }

  @Test
  public void FiftyHoursHourly_TimeAndHalf() throws Exception {
    assertPay(550.0, calculate(50, 10, true));
  }

  @Test
  public void FiftyHoursNonHourly_StraightTime() throws Exception {
    assertPay(500.0, calculate(50, 10, false));
  }
}