@Test
public void checkNotNullInputZeroNotNull0OutputZero() {

  // Arrange
  final Object reference = 0;
  final String errorMessageTemplate = "   ";
  final Object[] errorMessageArgs = {};
  // Act
  final Object retval = Util.checkNotNull(reference, errorMessageTemplate, errorMessageArgs);
  // Assert result
  Assert.assertEquals(new Integer(0), retval);
}