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Caches should be bound to instances.

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Before, caches were global and so different instances of the stores
would share caches. This caused problems in the unit tests.
This commit is contained in:
Erik Johnston 2015-06-03 14:45:17 +01:00
parent 3483b78d1a
commit d8866d7277
3 changed files with 81 additions and 50 deletions
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84
tests/storage/test__base.py
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@ -96,73 +96,84 @@ class CacheDecoratorTestCase(unittest.TestCase):
@defer.inlineCallbacks
def test_passthrough(self):
@cached()
def func(self, key):
return key
class A(object):
@cached()
def func(self, key):
return key
self.assertEquals((yield func(self, "foo")), "foo")
self.assertEquals((yield func(self, "bar")), "bar")
a = A()
self.assertEquals((yield a.func("foo")), "foo")
self.assertEquals((yield a.func("bar")), "bar")
@defer.inlineCallbacks
def test_hit(self):
callcount = [0]
@cached()
def func(self, key):
callcount[0] += 1
return key
class A(object):
@cached()
def func(self, key):
callcount[0] += 1
return key
yield func(self, "foo")
a = A()
yield a.func("foo")
self.assertEquals(callcount[0], 1)
self.assertEquals((yield func(self, "foo")), "foo")
self.assertEquals((yield a.func("foo")), "foo")
self.assertEquals(callcount[0], 1)
@defer.inlineCallbacks
def test_invalidate(self):
callcount = [0]
@cached()
def func(self, key):
callcount[0] += 1
return key
class A(object):
@cached()
def func(self, key):
callcount[0] += 1
return key
yield func(self, "foo")
a = A()
yield a.func("foo")
self.assertEquals(callcount[0], 1)
func.invalidate("foo")
a.func.invalidate("foo")
yield func(self, "foo")
yield a.func("foo")
self.assertEquals(callcount[0], 2)
def test_invalidate_missing(self):
@cached()
def func(self, key):
return key
class A(object):
@cached()
def func(self, key):
return key
func.invalidate("what")
A().func.invalidate("what")
@defer.inlineCallbacks
def test_max_entries(self):
callcount = [0]
@cached(max_entries=10)
def func(self, key):
callcount[0] += 1
return key
class A(object):
@cached(max_entries=10)
def func(self, key):
callcount[0] += 1
return key
for k in range(0,12):
yield func(self, k)
a = A()
for k in range(0, 12):
yield a.func(k)
self.assertEquals(callcount[0], 12)
# There must have been at least 2 evictions, meaning if we calculate
# all 12 values again, we must get called at least 2 more times
for k in range(0,12):
yield func(self, k)
yield a.func(k)
self.assertTrue(callcount[0] >= 14,
msg="Expected callcount >= 14, got %d" % (callcount[0]))
@ -171,12 +182,15 @@ class CacheDecoratorTestCase(unittest.TestCase):
def test_prefill(self):
callcount = [0]
@cached()
def func(self, key):
callcount[0] += 1
return key
class A(object):
@cached()
def func(self, key):
callcount[0] += 1
return key
func.prefill("foo", 123)
a = A()
self.assertEquals((yield func(self, "foo")), 123)
a.func.prefill("foo", 123)
self.assertEquals((yield a.func("foo")), 123)
self.assertEquals(callcount[0], 0)