def test_sinh():
    a = sinh(interval(-1, 1))
    assert a.start == np.sinh(-1)
    assert a.end == np.sinh(1)

    a = sinh(1)
    assert a.start == np.sinh(1)
    assert a.end == np.sinh(1)
def test_sinh():
    a = sinh(interval(-1, 1))
    assert a.start == np.sinh(-1)
    assert a.end == np.sinh(1)

    a = sinh(1)
    assert a.start == np.sinh(1)
    assert a.end == np.sinh(1)