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#
# Copyright (c) 2001 - 2019 The SCons Foundation
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
#
# The above copyright notice and this permission notice shall be included
# in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY
# KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
# WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
#
__revision__ = "src/engine/SCons/MemoizeTests.py e724ae812eb96f4858a132f5b8c769724744faf6 2019-07-21 00:04:47 bdeegan"
import sys
import unittest
import SCons.Memoize
# Enable memoization counting
SCons.Memoize.EnableMemoization()
class FakeObject(object):
def __init__(self):
self._memo = {}
def _dict_key(self, argument):
return argument
@SCons.Memoize.CountDictCall(_dict_key)
def dict(self, argument):
memo_key = argument
try:
memo_dict = self._memo['dict']
except KeyError:
memo_dict = {}
self._memo['dict'] = memo_dict
else:
try:
return memo_dict[memo_key]
except KeyError:
pass
result = self.compute_dict(argument)
memo_dict[memo_key] = result
return result
@SCons.Memoize.CountMethodCall
def value(self):
try:
return self._memo['value']
except KeyError:
pass
result = self.compute_value()
self._memo['value'] = result
return result
def get_memoizer_counter(self, name):
return SCons.Memoize.CounterList.get(self.__class__.__name__+'.'+name, None)
class Returner(object):
def __init__(self, result):
self.result = result
self.calls = 0
def __call__(self, *args, **kw):
self.calls = self.calls + 1
return self.result
class CountDictTestCase(unittest.TestCase):
def test___call__(self):
"""Calling a Memoized dict method
"""
obj = FakeObject()
called = []
fd1 = Returner(1)
fd2 = Returner(2)
obj.compute_dict = fd1
r = obj.dict(11)
assert r == 1, r
obj.compute_dict = fd2
r = obj.dict(12)
assert r == 2, r
r = obj.dict(11)
assert r == 1, r
obj.compute_dict = fd1
r = obj.dict(11)
assert r == 1, r
r = obj.dict(12)
assert r == 2, r
assert fd1.calls == 1, fd1.calls
assert fd2.calls == 1, fd2.calls
c = obj.get_memoizer_counter('dict')
assert c.hit == 3, c.hit
assert c.miss == 2, c.miss
class CountValueTestCase(unittest.TestCase):
def test___call__(self):
"""Calling a Memoized value method
"""
obj = FakeObject()
called = []
fv1 = Returner(1)
fv2 = Returner(2)
obj.compute_value = fv1
r = obj.value()
assert r == 1, r
r = obj.value()
assert r == 1, r
obj.compute_value = fv2
r = obj.value()
assert r == 1, r
r = obj.value()
assert r == 1, r
assert fv1.calls == 1, fv1.calls
assert fv2.calls == 0, fv2.calls
c = obj.get_memoizer_counter('value')
assert c.hit == 3, c.hit
assert c.miss == 1, c.miss
if __name__ == "__main__":
unittest.main()
# Local Variables:
# tab-width:4
# indent-tabs-mode:nil
# End:
# vim: set expandtab tabstop=4 shiftwidth=4:
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