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from __future__ import division, with_statement
import pytest
import sys # noqa
@pytest.mark.skipif("sys.version_info < (2, 5)")
def test_memoize_method_clear():
from pytools import memoize_method
class SomeClass:
def __init__(self):
self.run_count = 0
@memoize_method
def f(self):
self.run_count += 1
return 17
sc = SomeClass()
sc.f()
sc.f()
assert sc.run_count == 1
sc.f.clear_cache(sc)
def test_memoize_method_with_uncached():
from pytools import memoize_method_with_uncached
class SomeClass:
def __init__(self):
self.run_count = 0
@memoize_method_with_uncached(uncached_args=[1], uncached_kwargs=["z"])
def f(self, x, y, z):
self.run_count += 1
return 17
sc = SomeClass()
sc.f(17, 18, z=19)
sc.f(17, 19, z=20)
assert sc.run_count == 1
sc.f(18, 19, z=20)
assert sc.run_count == 2
sc.f.clear_cache(sc)
def test_memoize_method_nested():
from pytools import memoize_method_nested
class SomeClass:
def __init__(self):
self.run_count = 0
def f(self):
@memoize_method_nested
def inner(x):
self.run_count += 1
return 2*x
inner(5)
inner(5)
sc = SomeClass()
sc.f()
assert sc.run_count == 1
def test_p_convergence_verifier():
pytest.importorskip("numpy")
from pytools.convergence import PConvergenceVerifier
pconv_verifier = PConvergenceVerifier()
for order in [2, 3, 4, 5]:
pconv_verifier.add_data_point(order, 0.1**order)
pconv_verifier()
pconv_verifier = PConvergenceVerifier()
for order in [2, 3, 4, 5]:
pconv_verifier.add_data_point(order, 0.5**order)
pconv_verifier()
pconv_verifier = PConvergenceVerifier()
for order in [2, 3, 4, 5]:
pconv_verifier.add_data_point(order, 2)
with pytest.raises(AssertionError):
pconv_verifier()
def test_memoize():
from pytools import memoize
count = [0]
@memoize(use_kwargs=True)
def f(i, j=1):
count[0] += 1
return i + j
assert f(1) == 2
assert f(1, 2) == 3
assert f(2, j=3) == 5
assert count[0] == 3
assert f(1) == 2
assert f(1, 2) == 3
assert f(2, j=3) == 5
assert count[0] == 3
def test_memoize_keyfunc():
from pytools import memoize
count = [0]
@memoize(key=lambda i, j=(1,): (i, len(j)))
def f(i, j=(1,)):
count[0] += 1
return i + len(j)
assert f(1) == 2
assert f(1, [2]) == 2
assert f(2, j=[2, 3]) == 4
assert count[0] == 2
assert f(1) == 2
assert f(1, (2,)) == 2
assert f(2, j=(2, 3)) == 4
assert count[0] == 2
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