mirror of https://github.com/python/cpython
109 lines
3.0 KiB
Python
109 lines
3.0 KiB
Python
"""
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Test cases for the repr module
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Nick Mathewson
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"""
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import unittest
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from test_support import run_unittest
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from repr import repr as r # Don't shadow builtin repr
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def nestedTuple(nesting):
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t = ()
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for i in range(nesting):
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t = (t,)
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return t
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class ReprTests(unittest.TestCase):
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def test_string(self):
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eq = self.assertEquals
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eq(r("abc"), "'abc'")
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eq(r("abcdefghijklmnop"),"'abcdefghijklmnop'")
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s = "a"*30+"b"*30
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expected = `s`[:13] + "..." + `s`[-14:]
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eq(r(s), expected)
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eq(r("\"'"), repr("\"'"))
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s = "\""*30+"'"*100
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expected = `s`[:13] + "..." + `s`[-14:]
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eq(r(s), expected)
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def test_container(self):
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eq = self.assertEquals
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# Tuples give up after 6 elements
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eq(r(()), "()")
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eq(r((1,)), "(1,)")
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eq(r((1, 2, 3)), "(1, 2, 3)")
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eq(r((1, 2, 3, 4, 5, 6)), "(1, 2, 3, 4, 5, 6)")
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eq(r((1, 2, 3, 4, 5, 6, 7)), "(1, 2, 3, 4, 5, 6, ...)")
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# Lists give up after 6 as well
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eq(r([]), "[]")
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eq(r([1]), "[1]")
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eq(r([1, 2, 3]), "[1, 2, 3]")
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eq(r([1, 2, 3, 4, 5, 6]), "[1, 2, 3, 4, 5, 6]")
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eq(r([1, 2, 3, 4, 5, 6, 7]), "[1, 2, 3, 4, 5, 6, ...]")
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# Dictionaries give up after 4.
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eq(r({}), "{}")
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d = {'alice': 1, 'bob': 2, 'charles': 3, 'dave': 4}
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eq(r(d), "{'alice': 1, 'bob': 2, 'charles': 3, 'dave': 4}")
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d['arthur'] = 1
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eq(r(d), "{'alice': 1, 'arthur': 1, 'bob': 2, 'charles': 3, ...}")
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def test_numbers(self):
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eq = self.assertEquals
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eq(r(123), repr(123))
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eq(r(123L), repr(123L))
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eq(r(1.0/3), repr(1.0/3))
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n = 10L**100
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expected = `n`[:18] + "..." + `n`[-19:]
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eq(r(n), expected)
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def test_instance(self):
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eq = self.assertEquals
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i1 = ClassWithRepr("a")
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eq(r(i1), repr(i1))
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i2 = ClassWithRepr("x"*1000)
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expected = `i2`[:13] + "..." + `i2`[-14:]
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eq(r(i2), expected)
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i3 = ClassWithFailingRepr()
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eq(r(i3), ("<ClassWithFailingRepr instance at %x>"%id(i3)))
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def test_nesting(self):
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eq = self.assertEquals
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# everything is meant to give up after 6 levels.
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eq(r([[[[[[[]]]]]]]), "[[[[[[[]]]]]]]")
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eq(r([[[[[[[[]]]]]]]]), "[[[[[[[...]]]]]]]")
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eq(r(nestedTuple(6)), "(((((((),),),),),),)")
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eq(r(nestedTuple(7)), "(((((((...),),),),),),)")
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eq(r({ nestedTuple(5) : nestedTuple(5) }),
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"{((((((),),),),),): ((((((),),),),),)}")
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eq(r({ nestedTuple(6) : nestedTuple(6) }),
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"{((((((...),),),),),): ((((((...),),),),),)}")
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eq(r([[[[[[{}]]]]]]), "[[[[[[{}]]]]]]")
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eq(r([[[[[[[{}]]]]]]]), "[[[[[[[...]]]]]]]")
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class ClassWithRepr:
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def __init__(self, s):
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self.s = s
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def __repr__(self):
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return "ClassWithLongRepr(%r)" % self.s
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class ClassWithFailingRepr:
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def __repr__(self):
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raise Exception("This should be caught by Repr.repr_instance")
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run_unittest(ReprTests)
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