406 lines
15 KiB
Python
406 lines
15 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 sys
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import os
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import shutil
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import importlib
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import importlib.util
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import unittest
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from test.support import create_empty_file, verbose
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from reprlib import repr as r # Don't shadow builtin repr
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from reprlib import Repr
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from reprlib import recursive_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.assertEqual
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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 = repr(s)[:13] + "..." + repr(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 = repr(s)[:13] + "..." + repr(s)[-14:]
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eq(r(s), expected)
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def test_tuple(self):
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eq = self.assertEqual
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eq(r((1,)), "(1,)")
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t3 = (1, 2, 3)
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eq(r(t3), "(1, 2, 3)")
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r2 = Repr()
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r2.maxtuple = 2
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expected = repr(t3)[:-2] + "...)"
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eq(r2.repr(t3), expected)
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def test_container(self):
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from array import array
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from collections import deque
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eq = self.assertEqual
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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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# Sets give up after 6 as well
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eq(r(set([])), "set()")
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eq(r(set([1])), "{1}")
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eq(r(set([1, 2, 3])), "{1, 2, 3}")
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eq(r(set([1, 2, 3, 4, 5, 6])), "{1, 2, 3, 4, 5, 6}")
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eq(r(set([1, 2, 3, 4, 5, 6, 7])), "{1, 2, 3, 4, 5, 6, ...}")
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# Frozensets give up after 6 as well
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eq(r(frozenset([])), "frozenset()")
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eq(r(frozenset([1])), "frozenset({1})")
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eq(r(frozenset([1, 2, 3])), "frozenset({1, 2, 3})")
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eq(r(frozenset([1, 2, 3, 4, 5, 6])), "frozenset({1, 2, 3, 4, 5, 6})")
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eq(r(frozenset([1, 2, 3, 4, 5, 6, 7])), "frozenset({1, 2, 3, 4, 5, 6, ...})")
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# collections.deque after 6
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eq(r(deque([1, 2, 3, 4, 5, 6, 7])), "deque([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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# array.array after 5.
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eq(r(array('i')), "array('i')")
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eq(r(array('i', [1])), "array('i', [1])")
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eq(r(array('i', [1, 2])), "array('i', [1, 2])")
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eq(r(array('i', [1, 2, 3])), "array('i', [1, 2, 3])")
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eq(r(array('i', [1, 2, 3, 4])), "array('i', [1, 2, 3, 4])")
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eq(r(array('i', [1, 2, 3, 4, 5])), "array('i', [1, 2, 3, 4, 5])")
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eq(r(array('i', [1, 2, 3, 4, 5, 6])),
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"array('i', [1, 2, 3, 4, 5, ...])")
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def test_set_literal(self):
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eq = self.assertEqual
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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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def test_frozenset(self):
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eq = self.assertEqual
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eq(r(frozenset({1})), "frozenset({1})")
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eq(r(frozenset({1, 2, 3})), "frozenset({1, 2, 3})")
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eq(r(frozenset({1, 2, 3, 4, 5, 6})), "frozenset({1, 2, 3, 4, 5, 6})")
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eq(r(frozenset({1, 2, 3, 4, 5, 6, 7})), "frozenset({1, 2, 3, 4, 5, 6, ...})")
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def test_numbers(self):
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eq = self.assertEqual
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eq(r(123), repr(123))
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eq(r(123), repr(123))
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eq(r(1.0/3), repr(1.0/3))
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n = 10**100
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expected = repr(n)[:18] + "..." + repr(n)[-19:]
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eq(r(n), expected)
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def test_instance(self):
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eq = self.assertEqual
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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 = repr(i2)[:13] + "..." + repr(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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s = r(ClassWithFailingRepr)
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self.assertTrue(s.startswith("<class "))
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self.assertTrue(s.endswith(">"))
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self.assertIn(s.find("..."), [12, 13])
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def test_lambda(self):
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r = repr(lambda x: x)
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self.assertTrue(r.startswith("<function ReprTests.test_lambda.<locals>.<lambda"), r)
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# XXX anonymous functions? see func_repr
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def test_builtin_function(self):
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eq = self.assertEqual
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# Functions
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eq(repr(hash), '<built-in function hash>')
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# Methods
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self.assertTrue(repr(''.split).startswith(
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'<built-in method split of str object at 0x'))
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def test_range(self):
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eq = self.assertEqual
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eq(repr(range(1)), 'range(0, 1)')
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eq(repr(range(1, 2)), 'range(1, 2)')
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eq(repr(range(1, 4, 3)), 'range(1, 4, 3)')
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def test_nesting(self):
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eq = self.assertEqual
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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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def test_cell(self):
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def get_cell():
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x = 42
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def inner():
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return x
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return inner
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x = get_cell().__closure__[0]
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self.assertRegex(repr(x), r'<cell at 0x[0-9A-Fa-f]+: '
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r'int object at 0x[0-9A-Fa-f]+>')
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self.assertRegex(r(x), r'<cell at 0x.*\.\.\..*>')
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def test_descriptors(self):
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eq = self.assertEqual
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# method descriptors
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eq(repr(dict.items), "<method 'items' of 'dict' objects>")
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# XXX member descriptors
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# XXX attribute descriptors
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# XXX slot descriptors
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# static and class methods
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class C:
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def foo(cls): pass
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x = staticmethod(C.foo)
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self.assertTrue(repr(x).startswith('<staticmethod object at 0x'))
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x = classmethod(C.foo)
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self.assertTrue(repr(x).startswith('<classmethod object at 0x'))
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def test_unsortable(self):
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# Repr.repr() used to call sorted() on sets, frozensets and dicts
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# without taking into account that not all objects are comparable
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x = set([1j, 2j, 3j])
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y = frozenset(x)
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z = {1j: 1, 2j: 2}
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r(x)
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r(y)
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r(z)
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def write_file(path, text):
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with open(path, 'w', encoding='ASCII') as fp:
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fp.write(text)
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class LongReprTest(unittest.TestCase):
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longname = 'areallylongpackageandmodulenametotestreprtruncation'
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def setUp(self):
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self.pkgname = os.path.join(self.longname)
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self.subpkgname = os.path.join(self.longname, self.longname)
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# Make the package and subpackage
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shutil.rmtree(self.pkgname, ignore_errors=True)
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os.mkdir(self.pkgname)
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create_empty_file(os.path.join(self.pkgname, '__init__.py'))
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shutil.rmtree(self.subpkgname, ignore_errors=True)
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os.mkdir(self.subpkgname)
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create_empty_file(os.path.join(self.subpkgname, '__init__.py'))
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# Remember where we are
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self.here = os.getcwd()
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sys.path.insert(0, self.here)
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# When regrtest is run with its -j option, this command alone is not
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# enough.
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importlib.invalidate_caches()
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def tearDown(self):
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actions = []
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for dirpath, dirnames, filenames in os.walk(self.pkgname):
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for name in dirnames + filenames:
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actions.append(os.path.join(dirpath, name))
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actions.append(self.pkgname)
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actions.sort()
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actions.reverse()
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for p in actions:
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if os.path.isdir(p):
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os.rmdir(p)
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else:
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os.remove(p)
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del sys.path[0]
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def _check_path_limitations(self, module_name):
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# base directory
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source_path_len = len(self.here)
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# a path separator + `longname` (twice)
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source_path_len += 2 * (len(self.longname) + 1)
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# a path separator + `module_name` + ".py"
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source_path_len += len(module_name) + 1 + len(".py")
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cached_path_len = (source_path_len +
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len(importlib.util.cache_from_source("x.py")) - len("x.py"))
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if os.name == 'nt' and cached_path_len >= 258:
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# Under Windows, the max path len is 260 including C's terminating
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# NUL character.
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# (see http://msdn.microsoft.com/en-us/library/windows/desktop/aa365247%28v=vs.85%29.aspx#maxpath)
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self.skipTest("test paths too long (%d characters) for Windows' 260 character limit"
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% cached_path_len)
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elif os.name == 'nt' and verbose:
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print("cached_path_len =", cached_path_len)
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def test_module(self):
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self.maxDiff = None
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self._check_path_limitations(self.pkgname)
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create_empty_file(os.path.join(self.subpkgname, self.pkgname + '.py'))
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importlib.invalidate_caches()
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from areallylongpackageandmodulenametotestreprtruncation.areallylongpackageandmodulenametotestreprtruncation import areallylongpackageandmodulenametotestreprtruncation
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module = areallylongpackageandmodulenametotestreprtruncation
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self.assertEqual(repr(module), "<module %r from %r>" % (module.__name__, module.__file__))
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self.assertEqual(repr(sys), "<module 'sys' (built-in)>")
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def test_type(self):
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self._check_path_limitations('foo')
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eq = self.assertEqual
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write_file(os.path.join(self.subpkgname, 'foo.py'), '''\
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class foo(object):
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pass
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''')
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importlib.invalidate_caches()
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from areallylongpackageandmodulenametotestreprtruncation.areallylongpackageandmodulenametotestreprtruncation import foo
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eq(repr(foo.foo),
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"<class '%s.foo'>" % foo.__name__)
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@unittest.skip('need a suitable object')
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def test_object(self):
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# XXX Test the repr of a type with a really long tp_name but with no
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# tp_repr. WIBNI we had ::Inline? :)
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pass
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def test_class(self):
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self._check_path_limitations('bar')
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write_file(os.path.join(self.subpkgname, 'bar.py'), '''\
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class bar:
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pass
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''')
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importlib.invalidate_caches()
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from areallylongpackageandmodulenametotestreprtruncation.areallylongpackageandmodulenametotestreprtruncation import bar
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# Module name may be prefixed with "test.", depending on how run.
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self.assertEqual(repr(bar.bar), "<class '%s.bar'>" % bar.__name__)
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def test_instance(self):
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self._check_path_limitations('baz')
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write_file(os.path.join(self.subpkgname, 'baz.py'), '''\
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class baz:
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pass
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''')
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importlib.invalidate_caches()
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from areallylongpackageandmodulenametotestreprtruncation.areallylongpackageandmodulenametotestreprtruncation import baz
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ibaz = baz.baz()
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self.assertTrue(repr(ibaz).startswith(
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"<%s.baz object at 0x" % baz.__name__))
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def test_method(self):
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self._check_path_limitations('qux')
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eq = self.assertEqual
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write_file(os.path.join(self.subpkgname, 'qux.py'), '''\
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class aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa:
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def amethod(self): pass
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''')
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importlib.invalidate_caches()
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from areallylongpackageandmodulenametotestreprtruncation.areallylongpackageandmodulenametotestreprtruncation import qux
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# Unbound methods first
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r = repr(qux.aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa.amethod)
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self.assertTrue(r.startswith('<function aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa.amethod'), r)
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# Bound method next
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iqux = qux.aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa()
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r = repr(iqux.amethod)
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self.assertTrue(r.startswith(
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'<bound method aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa.amethod of <%s.aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa object at 0x' \
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% (qux.__name__,) ), r)
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@unittest.skip('needs a built-in function with a really long name')
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def test_builtin_function(self):
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# XXX test built-in functions and methods with really long names
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pass
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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 "ClassWithRepr(%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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class MyContainer:
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'Helper class for TestRecursiveRepr'
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def __init__(self, values):
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self.values = list(values)
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def append(self, value):
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self.values.append(value)
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@recursive_repr()
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def __repr__(self):
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return '<' + ', '.join(map(str, self.values)) + '>'
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class MyContainer2(MyContainer):
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@recursive_repr('+++')
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def __repr__(self):
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return '<' + ', '.join(map(str, self.values)) + '>'
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class MyContainer3:
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def __repr__(self):
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'Test document content'
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pass
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wrapped = __repr__
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wrapper = recursive_repr()(wrapped)
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class TestRecursiveRepr(unittest.TestCase):
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def test_recursive_repr(self):
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m = MyContainer(list('abcde'))
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m.append(m)
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m.append('x')
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m.append(m)
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self.assertEqual(repr(m), '<a, b, c, d, e, ..., x, ...>')
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m = MyContainer2(list('abcde'))
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m.append(m)
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m.append('x')
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m.append(m)
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self.assertEqual(repr(m), '<a, b, c, d, e, +++, x, +++>')
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def test_assigned_attributes(self):
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from functools import WRAPPER_ASSIGNMENTS as assigned
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wrapped = MyContainer3.wrapped
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wrapper = MyContainer3.wrapper
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for name in assigned:
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self.assertIs(getattr(wrapper, name), getattr(wrapped, name))
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if __name__ == "__main__":
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unittest.main()
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