@Test
void find_whenGivenLinearEquation_thenReturnsCorrectRoot() {

    ImmutableList<Complex> roots = QuarticRootFinder.find(0, 0, 0, 2, 1);
    ImmutableList<Pair<Double, Double>> expectedRoots = ImmutableList.of(
            Pair.of(-0.5, 0.0)
    );
    assertEquals(expectedRoots, roots);
}