本文整理汇总了Python中twext.python.filepath.CachingFilePath.siblingExtensionSearch方法的典型用法代码示例。如果您正苦于以下问题：Python CachingFilePath.siblingExtensionSearch方法的具体用法？Python CachingFilePath.siblingExtensionSearch怎么用？Python CachingFilePath.siblingExtensionSearch使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类twext.python.filepath.CachingFilePath的用法示例。
在下文中一共展示了CachingFilePath.siblingExtensionSearch方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: EINVALTestCase
# 需要导入模块: from twext.python.filepath import CachingFilePath [as 别名]
# 或者: from twext.python.filepath.CachingFilePath import siblingExtensionSearch [as 别名]
class EINVALTestCase(TestCase):
"""
Sometimes, L{os.listdir} will raise C{EINVAL}. This is a transient error,
and L{CachingFilePath.listdir} should work around it by retrying the
C{listdir} operation until it succeeds.
"""
def setUp(self):
"""
Create a L{CachingFilePath} for the test to use.
"""
self.cfp = CachingFilePath(self.mktemp())
self.clock = Clock()
self.cfp._sleep = self.clock.advance
def test_testValidity(self):
"""
If C{listdir} is replaced on a L{CachingFilePath}, we should be able to
observe exceptions raised by the replacement. This verifies that the
test patching done here is actually testing something.
"""
class CustomException(Exception): "Just for testing."
def blowUp(dirname):
raise CustomException()
self.cfp._listdir = blowUp
self.assertRaises(CustomException, self.cfp.listdir)
self.assertRaises(CustomException, self.cfp.children)
def test_retryLoop(self):
"""
L{CachingFilePath} should catch C{EINVAL} and respond by retrying the
C{listdir} operation until it succeeds.
"""
calls = []
def raiseEINVAL(dirname):
calls.append(dirname)
if len(calls) < 5:
raise OSError(EINVAL, "This should be caught by the test.")
return ['a', 'b', 'c']
self.cfp._listdir = raiseEINVAL
self.assertEquals(self.cfp.listdir(), ['a', 'b', 'c'])
self.assertEquals(self.cfp.children(), [
CachingFilePath(pathjoin(self.cfp.path, 'a')),
CachingFilePath(pathjoin(self.cfp.path, 'b')),
CachingFilePath(pathjoin(self.cfp.path, 'c')),])
def requireTimePassed(self, filenames):
"""
Create a replacement for listdir() which only fires after a certain
amount of time.
"""
self.calls = []
def thunk(dirname):
now = self.clock.seconds()
if now < 20.0:
self.calls.append(now)
raise OSError(EINVAL, "Not enough time has passed yet.")
else:
return filenames
self.cfp._listdir = thunk
def assertRequiredTimePassed(self):
"""
Assert that calls to the simulated time.sleep() installed by
C{requireTimePassed} have been invoked the required number of times.
"""
# Waiting should be growing by *2 each time until the additional wait
# exceeds BACKOFF_MAX (5), at which point we should wait for 5s each
# time.
def cumulative(values):
current = 0.0
for value in values:
current += value
yield current
self.assertEquals(self.calls,
list(cumulative(
[0.0, 0.1, 0.2, 0.4, 0.8, 1.6, 3.2, 5.0, 5.0])))
def test_backoff(self):
"""
L{CachingFilePath} will wait for an increasing interval up to
C{BACKOFF_MAX} between calls to listdir().
"""
self.requireTimePassed(['a', 'b', 'c'])
self.assertEquals(self.cfp.listdir(), ['a', 'b', 'c'])
def test_siblingExtensionSearch(self):
"""
L{FilePath.siblingExtensionSearch} is unfortunately not implemented in
terms of L{FilePath.listdir}, so we need to verify that it will also
retry.
"""
filenames = [self.cfp.basename()+'.a',
#.........这里部分代码省略.........