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145 lines
4.7 KiB
145 lines
4.7 KiB
# UserString is a wrapper around the native builtin string type.
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# UserString instances should behave similar to builtin string objects.
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import string
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from test import test_support, string_tests
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from UserString import UserString, MutableString
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import warnings
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class UserStringTest(
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string_tests.CommonTest,
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string_tests.MixinStrUnicodeUserStringTest,
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string_tests.MixinStrStringUserStringTest,
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string_tests.MixinStrUserStringTest
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):
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type2test = UserString
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# Overwrite the three testing methods, because UserString
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# can't cope with arguments propagated to UserString
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# (and we don't test with subclasses)
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def checkequal(self, result, object, methodname, *args):
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result = self.fixtype(result)
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object = self.fixtype(object)
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# we don't fix the arguments, because UserString can't cope with it
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realresult = getattr(object, methodname)(*args)
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self.assertEqual(
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result,
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realresult
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)
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def checkraises(self, exc, obj, methodname, *args):
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obj = self.fixtype(obj)
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# we don't fix the arguments, because UserString can't cope with it
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with self.assertRaises(exc) as cm:
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getattr(obj, methodname)(*args)
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self.assertNotEqual(cm.exception.args[0], '')
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def checkcall(self, object, methodname, *args):
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object = self.fixtype(object)
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# we don't fix the arguments, because UserString can't cope with it
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getattr(object, methodname)(*args)
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class MutableStringTest(UserStringTest):
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type2test = MutableString
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# MutableStrings can be hashed => deactivate test
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def test_hash(self):
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pass
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def test_setitem(self):
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s = self.type2test("foo")
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self.assertRaises(IndexError, s.__setitem__, -4, "bar")
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self.assertRaises(IndexError, s.__setitem__, 3, "bar")
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s[-1] = "bar"
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self.assertEqual(s, "fobar")
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s[0] = "bar"
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self.assertEqual(s, "barobar")
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def test_delitem(self):
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s = self.type2test("foo")
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self.assertRaises(IndexError, s.__delitem__, -4)
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self.assertRaises(IndexError, s.__delitem__, 3)
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del s[-1]
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self.assertEqual(s, "fo")
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del s[0]
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self.assertEqual(s, "o")
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del s[0]
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self.assertEqual(s, "")
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def test_setslice(self):
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s = self.type2test("foo")
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s[:] = "bar"
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self.assertEqual(s, "bar")
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s[1:2] = "foo"
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self.assertEqual(s, "bfoor")
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s[1:-1] = UserString("a")
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self.assertEqual(s, "bar")
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s[0:10] = 42
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self.assertEqual(s, "42")
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def test_delslice(self):
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s = self.type2test("foobar")
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del s[3:10]
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self.assertEqual(s, "foo")
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del s[-1:10]
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self.assertEqual(s, "fo")
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def test_extended_set_del_slice(self):
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indices = (0, None, 1, 3, 19, 100, -1, -2, -31, -100)
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orig = string.ascii_letters + string.digits
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for start in indices:
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for stop in indices:
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# Use indices[1:] when MutableString can handle real
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# extended slices
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for step in (None, 1, -1):
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s = self.type2test(orig)
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L = list(orig)
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# Make sure we have a slice of exactly the right length,
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# but with (hopefully) different data.
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data = L[start:stop:step]
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data.reverse()
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L[start:stop:step] = data
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s[start:stop:step] = "".join(data)
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self.assertEqual(s, "".join(L))
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del L[start:stop:step]
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del s[start:stop:step]
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self.assertEqual(s, "".join(L))
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def test_immutable(self):
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s = self.type2test("foobar")
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s2 = s.immutable()
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self.assertEqual(s, s2)
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self.assertIsInstance(s2, UserString)
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def test_iadd(self):
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s = self.type2test("foo")
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s += "bar"
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self.assertEqual(s, "foobar")
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s += UserString("baz")
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self.assertEqual(s, "foobarbaz")
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s += 42
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self.assertEqual(s, "foobarbaz42")
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def test_imul(self):
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s = self.type2test("foo")
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s *= 1
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self.assertEqual(s, "foo")
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s *= 2
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self.assertEqual(s, "foofoo")
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s *= -1
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self.assertEqual(s, "")
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def test_main():
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with warnings.catch_warnings():
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warnings.filterwarnings("ignore", ".*MutableString has been removed",
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DeprecationWarning)
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warnings.filterwarnings("ignore",
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".*__(get|set|del)slice__ has been removed",
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DeprecationWarning)
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test_support.run_unittest(UserStringTest, MutableStringTest)
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if __name__ == "__main__":
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test_main()
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