leapYearTest.java

public class LeapYearTests {

  private final LeapYear leapYear = new LeapYear();

  @Test
  public void divisibleBy4_notDivisibleBy100() {
    boolean leap = leapYear.isLeapYear(2016);
    assertTrue(leap);
  }

  @Test
  public void divisibleBy4_100_400() {
    boolean leap = leapYear.isLeapYear(2000);
    assertTrue(leap);
  }

  @Test
  public void notDivisibleBy4() {
    boolean leap = leapYear.isLeapYear(39);
    assertFalse(leap);
  }

  @Test
  public void divisibleBy4_and_100_not_400() {
    boolean leap = leapYear.isLeapYear(1900);
    assertFalse(leap);
  }
}