def test_InertialObject_update__diagonal():
sut = InertialObject(img=resources.chevron_image)
sut.x = 23.45
sut.y = 123.34
sut.velocity_x = 10.0
sut.velocity_y = -5.0
sut.update(1.0)
assert sut.x == 33.45
assert sut.y == 118.34
def test_InertialObject_update__partial_dt():
sut = InertialObject(img=resources.chevron_image)
sut.x = 23.45
sut.y = 123.34
sut.velocity_x = 10.0
sut.velocity_y = -5.0
sut.update(0.5)
assert sut.x == 28.45
assert sut.y == 120.84
def test_InertialObject_update__motionless():
sut = InertialObject(img=resources.chevron_image)
sut.x = 23.45
sut.y = 123.34
sut.velocity_x = 0.0
sut.velocity_y = 0.0
sut.update(1.0)
assert sut.x == 23.45
assert sut.y == 123.34