@Test
void find_whenGivenCubicEquation_thenReturnsCorrectRoots() {

    ImmutableList<Complex> roots = CubicRootFinder.find(1, 6, 12, 8);
    ImmutableList<Pair<Double, Double>> expectedRoots = ImmutableList.of(
            Pair.of(-2.0, 0.0),
            Pair.of(-2.0, 0.0),
            Pair.of(-2.0, 0.0)
    );
    assertEquals(expectedRoots, roots);
}