How to use the pyswarms.utils.functions.single_obj.easom function in pyswarms

def test_easom_dim_fail(outdim):
    """Test easom dim exception"""
    with pytest.raises(IndexError):
        fx.easom(outdim)

def test_easom_bound_fail(outbound):
    """Test easom bound exception"""
    with pytest.raises(ValueError):
        x = outbound(b["easom"].low, b["easom"].high, size=(3, 2))
        fx.easom(x)

def test_easom_output_size(common_minima2, targetdim):
    """Test easom output size."""
    assert fx.easom([-10, 0] * common_minima2).shape == targetdim

def test_easom_output(common_minima2):
    """Tests easom function output."""
    assert np.isclose(
        fx.easom([np.pi, np.pi] * common_minima2), (-1 * np.ones(3))
    ).all()