def test_has_duplicate_min(self):
        self.assertTrueOnAllArrayTypes(has_duplicate_min, [-2.1, 0, 0, -2.1, 1.1])
        self.assertFalseOnAllArrayTypes(has_duplicate_min, [2.1, 0, -1, 2, 1.1])
        self.assertTrueOnAllArrayTypes(has_duplicate_min, np.array([1, 1, 1, 1]))
        self.assertFalseOnAllArrayTypes(has_duplicate_min, np.array([0]))
        self.assertTrueOnAllArrayTypes(has_duplicate_min, np.array([1, 1]))