for (int m : NEGATIVE_INTEGER_CANDIDATES) {
        assertThrows(ArithmeticException.class, () -> IntMath.mod(x, m));
      }
    }
  }

  public void testModZeroModulusFails() {
    for (int x : ALL_INTEGER_CANDIDATES) {
      assertThrows(ArithmeticException.class, () -> IntMath.mod(x, 0));
    }
  }

  public void testGCD() {