def test_is_close(array):
vector = Vector(array)
point = Point(array)
assert point.size == vector.size
assert point.is_close(vector)
assert vector.is_close(point)
assert point.is_close(array)
assert vector.is_close(array)
def test_project_vector(vector_u, vector_v, vector_expected):
"""Test projecting vector u onto vector v."""
vector_u_projected = Vector(vector_v).project_vector(vector_u)
assert vector_u_projected.is_close(vector_expected)