def test_anim_heaviside(clock):
animation = anim(1, 3, 0, clock, delay=1)
assert animation == 1
clock.advance_sync(1)
assert animation == 3
clock.advance_sync(1)
assert animation == 3
def test_anim_strength(clock, n):
animation = anim(1, 3, 2, clock, strength=n)
assert animation == 1
clock.advance_sync(1)
assert animation == 1 + n
clock.advance_sync(1)
assert animation == 1 + n * 2
def test_anim_basic_vector(clock):
animation = anim((1, 2), (3, 4), 2, clock)
assert all(animation == (1, 2))
clock.advance_sync(1)
assert all(animation == (2, 3))
clock.advance_sync(1)
assert all(animation == (3, 4))
def test_anim_negative_duration(clock):
animation = anim(1, 3, -2, clock, delay=2)
assert animation == 3
clock.advance_sync(1)
assert animation == 2
clock.advance_sync(1)
assert animation == 1
clock.advance_sync(1)
assert animation == 1
def test_easing_name(clock):
animation = anim(1, 3, 2, clock, easing='quad')
assert animation == 1
clock.advance_sync(1)
assert animation == 1.5
clock.advance_sync(1)
assert animation == 3
clock.advance_sync(1)
assert animation == 3
def test_anim_basic(clock):
animation = anim(1, 3, 2, clock)
assert animation == 1
clock.advance_sync(1)
assert animation == 2
clock.advance_sync(1)
assert animation == 3
clock.advance_sync(1)
assert animation == 3
def test_anim_infinite(clock):
animation = anim(1, 3, 2, clock, infinite=True)
assert animation == 1
clock.advance_sync(1)
assert animation == 2
clock.advance_sync(1)
assert animation == 3
clock.advance_sync(1)
assert animation == 4
clock.advance_sync(1)
assert animation == 5
def test_anim_delay(clock):
animation = anim(1, 3, 2, clock, delay=1)
assert animation == 1
clock.advance_sync(1)
assert animation == 1
clock.advance_sync(1)
assert animation == 2
clock.advance_sync(1)
assert animation == 3
clock.advance_sync(1)
assert animation == 3
def test_done(clock):
lst = []
animation = anim(1, 3, 2, clock)
animation.done.add_done_callback(lambda fut: lst.append('done'))
assert lst == []
clock.advance_sync(1)
assert lst == []
clock.advance_sync(1)
assert lst == ['done']
clock.advance_sync(1)
assert lst == ['done']
clock.advance_sync(1)
assert lst == ['done']
def test_easing_func_infinite(clock):
animation = anim(1, 3, 2, clock, easing=math.sin, infinite=True)
assert abs(float(animation) - 1) < ε
clock.advance_sync(τ / 4)
assert abs(float(animation) - (1 + 2 / math.sqrt(2))) < ε
clock.advance_sync(τ / 4)
assert abs(float(animation) - 3) < ε
clock.advance_sync(τ / 4)
assert abs(float(animation) - (1 + 2 / math.sqrt(2))) < ε
clock.advance_sync(τ / 4)
assert abs(float(animation) - 1) < ε
clock.advance_sync(τ / 4)
assert abs(float(animation) - (1 - 2 / math.sqrt(2))) < ε
clock.advance_sync(τ / 4)
assert abs(float(animation) - -1) < ε
clock.advance_sync(τ / 4)
assert abs(float(animation) - (1 - 2 / math.sqrt(2))) < ε
clock.advance_sync(τ / 4)
assert abs(float(animation) - 1) < ε
def anim(self, target, duration=0, clock=None, *,
delay=0, easing=None, infinite=False, strength=1):
"""Animate this property
Causes this property's value to gradually become *target*
in *duration* time units.
for convenience, if *clock* is not given,
the ``clock`` attribute from the object
this property is on is used as the clock.
A :exc:`TypeError` is raised if that attribute doesn't exist.
See the :ref:`Animation <property-anim>` section of the documentation
for a discussion.
For detailed description of the arguments, see
:func:`gillcup.animations.anim`.
Returns a :class:`~asyncio.Future`-like object
that is done when the animation is finished.
"""
instance = self._instance
if clock is None:
try:
clock = instance.clock
except AttributeError:
raise TypeError('{} does not have a clock. '
'Pass a clock to anim() explicitly.'.format(
instance))
animation = anim(
start=self.replacement,
end=target,
duration=duration,
clock=clock,
delay=delay,
easing=easing,
infinite=infinite,
strength=strength,
)
self._parent_property.__set__(instance, animation)
return animation.done
def test_anim_negative_duration_past(clock):
animation = anim(1, 3, -2, clock)
assert animation == 1
clock.advance_sync(1)
assert animation == 1
def test_anim_heaviside_infinite(clock):
with pytest.raises(ValueError):
anim(1, 3, 0, clock, infinite=True)