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annotate tests/test-extensions-wrapfunction.py @ 39883:3e896b51aa5d

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storageutil: move metadata parsing and packing from revlog (API) Parsing and writing of revision text metadata is likely identical across storage backends. Let's move the code out of revlog so we don't need to import the revlog module in order to use it. Differential Revision: https://phab.mercurial-scm.org/D4754
author Gregory Szorc <gregory.szorc@gmail.com>
date Mon, 24 Sep 2018 14:31:31 -0700
parents ac865f020b99
children 2372284d9457
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 from __future__ import absolute_import, print_function
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2
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3 from mercurial import extensions
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4
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5 def genwrapper(x):
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6 def f(orig, *args, **kwds):
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7 return [x] + orig(*args, **kwds)
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8 f.x = x
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9 return f
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10
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11 def getid(wrapper):
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12 return getattr(wrapper, 'x', '-')
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13
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14 wrappers = [genwrapper(i) for i in range(5)]
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15
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16 class dummyclass(object):
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17 def getstack(self):
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18 return ['orig']
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19
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20 dummy = dummyclass()
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21
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22 def batchwrap(wrappers):
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23 for w in wrappers:
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24 extensions.wrapfunction(dummy, 'getstack', w)
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25 print('wrap %d: %s' % (getid(w), dummy.getstack()))
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26
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27 def batchunwrap(wrappers):
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28 for w in wrappers:
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29 result = None
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30 try:
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31 result = extensions.unwrapfunction(dummy, 'getstack', w)
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32 msg = str(dummy.getstack())
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33 except (ValueError, IndexError) as e:
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34 msg = e.__class__.__name__
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35 print('unwrap %s: %s: %s' % (getid(w), getid(result), msg))
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36
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37 batchwrap(wrappers + [wrappers[0]])
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38 batchunwrap([(wrappers[i] if i is not None and i >= 0 else None)
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39 for i in [3, None, 0, 4, 0, 2, 1, None]])
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40
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41 wrap0 = extensions.wrappedfunction(dummy, 'getstack', wrappers[0])
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42 wrap1 = extensions.wrappedfunction(dummy, 'getstack', wrappers[1])
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43
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44 # Use them in a different order from how they were created to check that
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45 # the wrapping happens in __enter__, not in __init__
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46 print('context manager', dummy.getstack())
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47 with wrap1:
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48 print('context manager', dummy.getstack())
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49 with wrap0:
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50 print('context manager', dummy.getstack())
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51 # Bad programmer forgets to unwrap the function, but the context
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52 # managers still unwrap their wrappings.
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53 extensions.wrapfunction(dummy, 'getstack', wrappers[2])
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54 print('context manager', dummy.getstack())
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55 print('context manager', dummy.getstack())
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56 print('context manager', dummy.getstack())
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57
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58 # Wrap callable object which has no __name__
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59 class callableobj(object):
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60 def __call__(self):
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61 return ['orig']
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62 dummy.cobj = callableobj()
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63 extensions.wrapfunction(dummy, 'cobj', wrappers[0])
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64 print('wrap callable object', dummy.cobj())