@Test
void find_whenOnlyOneRootIsReal_thenReturnsCorrectRoots() {

    ImmutableList<Complex> roots = CubicRootFinder.find(3, -10, 14, 27);
    ImmutableList<Pair<Double, Double>> expectedRoots = ImmutableList.of(
            Pair.of(-1.0, 0.0),
            Pair.of(2.1667, 2.075),
            Pair.of(2.1667, -2.075)
            );
    assertEquals(expectedRoots, roots);
}