@Test
public void testCubicRealRoots() {
assertCollection(AlgebraUtil.cubicRealRoots(0, 0, 0), 0, 0, 0);
assertCollection(AlgebraUtil.cubicRealRoots(0, 0, 1), -1);
assertCollection(
AlgebraUtil.cubicRealRoots(0, 0, -1000000000000000000000000000000000.0), 100000000000.0);
assertCollection(AlgebraUtil.cubicRealRoots(-3, 3, -1), 1, 1, 1);
assertCollection(AlgebraUtil.cubicRealRoots(1, -1, -1), 1, -1, -1);
assertCollection(MathUtil.simpleRound(10, AlgebraUtil.cubicRealRoots(-14, 56, -64)), 2, 4, 8);
assertCollection(
MathUtil.simpleRound(10, AlgebraUtil.cubicRealRoots(-0.875, 0.21875, -0.015625)),
0.5,
0.25,
0.125);
}
