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154 lines
3.8 KiB
Python
154 lines
3.8 KiB
Python
from unittest import TestCase
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from testfixtures import Replacer, ShouldRaise
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class TestReplacer(TestCase):
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def test_function(self):
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from testfixtures.tests import sample1
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assert sample1.z() == 'original z'
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def test_z():
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return 'replacement z'
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r = Replacer()
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r.replace('testfixtures.tests.sample1.z',test_z)
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assert sample1.z() == 'replacement z'
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r.restore()
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assert sample1.z() == 'original z'
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def test_class(self):
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from testfixtures.tests import sample1
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x = sample1.X()
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assert x.__class__.__name__ == 'X'
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class XReplacement(sample1.X): pass
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r = Replacer()
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r.replace('testfixtures.tests.sample1.X', XReplacement)
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x = sample1.X()
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assert x.__class__.__name__ == 'XReplacement'
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assert sample1.X().y() == 'original y'
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r.restore()
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x = sample1.X()
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assert x.__class__.__name__ == 'X'
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def test_method(self):
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from testfixtures.tests import sample1
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assert sample1.X().y() == 'original y'
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def test_y(self):
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return 'replacement y'
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r = Replacer()
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r.replace('testfixtures.tests.sample1.X.y',test_y)
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assert sample1.X().y()[:38] == 'replacement y'
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r.restore()
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assert sample1.X().y() == 'original y'
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def test_class_method(self):
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from testfixtures.tests import sample1
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c = sample1.X
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assert sample1.X.aMethod() is c
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def rMethod(cls):
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return cls, 1
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r = Replacer()
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r.replace('testfixtures.tests.sample1.X.aMethod',rMethod)
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sample1.X.aMethod()
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assert sample1.X.aMethod() == (c, 1)
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r.restore()
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sample1.X.aMethod()
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assert sample1.X.aMethod() is c
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def test_multiple_replace(self):
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from testfixtures.tests import sample1
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assert sample1.z() == 'original z'
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assert sample1.X().y() == 'original y'
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def test_y(self):
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return self.__class__.__name__
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def test_z():
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return 'replacement z'
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r = Replacer()
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r.replace('testfixtures.tests.sample1.z',test_z)
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r.replace('testfixtures.tests.sample1.X.y',test_y)
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assert sample1.z() == 'replacement z'
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assert sample1.X().y() == 'X'
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r.restore()
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assert sample1.z() == 'original z'
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assert sample1.X().y() == 'original y'
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def test_gotcha(self):
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# Just because you replace an object in one context:
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from testfixtures.tests import sample1
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from testfixtures.tests import sample2
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assert sample1.z() == 'original z'
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def test_z():
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return 'replacement z'
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r = Replacer()
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r.replace('testfixtures.tests.sample1.z',test_z)
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assert sample1.z() == 'replacement z'
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# Doesn't meant that it's replaced in all contexts:
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assert sample2.z() == 'original z'
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r.restore()
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def test_remove_called_twice(self):
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from testfixtures.tests import sample1
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def test_z(): pass
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r = Replacer()
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r.replace('testfixtures.tests.sample1.z',test_z)
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r.restore()
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assert sample1.z() == 'original z'
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r.restore()
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assert sample1.z() == 'original z'
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def test_with_statement(self):
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from testfixtures.tests import sample1
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assert sample1.z() == 'original z'
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def test_z():
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return 'replacement z'
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with Replacer() as r:
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r.replace('testfixtures.tests.sample1.z',test_z)
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assert sample1.z() == 'replacement z'
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assert sample1.z() == 'original z'
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def test_not_there(self):
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def test_bad(): pass
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with Replacer() as r:
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with ShouldRaise(AttributeError("Original 'bad' not found")):
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r.replace('testfixtures.tests.sample1.bad', test_bad)
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