@Test(expectedExceptions = IllegalArgumentException.class) public void testNullFunction() { ROOT_FINDER.getRoots(null); }
@Test(expectedExceptions = MathException.class) public void testNoRealRoots() { ROOT_FINDER.getRoots(NO_REAL_ROOTS); }
@Test public void test() { Double[] result = ROOT_FINDER.getRoots(TWO_REAL_ROOTS); Arrays.sort(result); assertEquals(result.length, 2); assertEquals(result[0], -4, EPS); assertEquals(result[1], -3, EPS); result = ROOT_FINDER.getRoots(ONE_REAL_ROOT); assertEquals(result.length, 2); assertEquals(result[0], 3, EPS); assertEquals(result[1], 3, EPS); result = ROOT_FINDER.getRoots(CLOSE_ROOTS); Arrays.sort(result); assertEquals(result.length, 2); assertEquals(result[1] - result[0], 1e-6, 1e-8); } }