@Test
void find_whenQuarticHasFourComplexRoots_thenReturnsCorrectRoots() {

    ImmutableList<Complex> roots = QuarticRootFinder.find(1, 1, 3, -1, 12);
    ImmutableList<Pair<Double, Double>> expectedRoots = ImmutableList.of(
            Pair.of(-1.3122, 1.7320),
            Pair.of(0.8122, 1.3717),
            Pair.of(0.8122, -1.3717),
            Pair.of(-1.3122, -1.7320)
    );
    assertEquals(expectedRoots, roots);
}