@Test(expected = NullPointerException.class)
public void shouldThrowNullPointerExceptionIfNullMapperPassedToMapThird() throws Exception {
// Given
Triple<Integer, String, Boolean> triple = tuple(5, "Five", true);
Mapper<Boolean, String> mapper = null;
// When
triple.mapThird(mapper);
// Then a NullPointerException is thrown
}
@Test(expected = NullPointerException.class)
public void shouldThrowNullPointerExceptionIfNullUnaryFunctionPassedToMapThird()
throws Exception {
// Given
Triple<Integer, String, Boolean> triple = tuple(5, "Five", true);
UnaryFunction<Boolean, String> function = null;
// When
triple.mapThird(function);
// Then a NullPointerException is thrown
}
@Test
public void shouldBeMappableUsingUnaryFunctionOnThirdPosition() throws Exception {
// Given
Triple<Integer, String, Boolean> triple = tuple(5, "Five", true);
UnaryFunction<Boolean, String> function =
new UnaryFunction<Boolean, String>() {
@Override
public String call(Boolean input) {
return input.toString();
}
};
Triple<Integer, String, String> expected = tuple(5, "Five", "true");
// When
Triple<Integer, String, String> actual = triple.mapThird(function);
// Then
assertThat(actual, is(expected));
}