174 lines
4.5 KiB
Python
174 lines
4.5 KiB
Python
import pytest
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from _pytest._io.saferepr import _pformat_dispatch
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from _pytest._io.saferepr import saferepr
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def test_simple_repr():
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assert saferepr(1) == "1"
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assert saferepr(None) == "None"
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def test_maxsize():
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s = saferepr("x" * 50, maxsize=25)
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assert len(s) == 25
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expected = repr("x" * 10 + "..." + "x" * 10)
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assert s == expected
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def test_maxsize_error_on_instance():
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class A:
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def __repr__(self):
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raise ValueError("...")
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s = saferepr(("*" * 50, A()), maxsize=25)
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assert len(s) == 25
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assert s[0] == "(" and s[-1] == ")"
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def test_exceptions():
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class BrokenRepr:
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def __init__(self, ex):
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self.ex = ex
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def __repr__(self):
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raise self.ex
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class BrokenReprException(Exception):
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__str__ = None
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__repr__ = None
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assert "Exception" in saferepr(BrokenRepr(Exception("broken")))
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s = saferepr(BrokenReprException("really broken"))
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assert "TypeError" in s
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assert "TypeError" in saferepr(BrokenRepr("string"))
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none = None
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try:
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none()
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except BaseException as exc:
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exp_exc = repr(exc)
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obj = BrokenRepr(BrokenReprException("omg even worse"))
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s2 = saferepr(obj)
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assert s2 == (
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"<[unpresentable exception ({!s}) raised in repr()] BrokenRepr object at 0x{:x}>".format(
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exp_exc, id(obj)
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)
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)
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def test_baseexception():
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"""Test saferepr() with BaseExceptions, which includes pytest outcomes."""
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class RaisingOnStrRepr(BaseException):
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def __init__(self, exc_types):
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self.exc_types = exc_types
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def raise_exc(self, *args):
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try:
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self.exc_type = self.exc_types.pop(0)
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except IndexError:
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pass
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if hasattr(self.exc_type, "__call__"):
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raise self.exc_type(*args)
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raise self.exc_type
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def __str__(self):
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self.raise_exc("__str__")
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def __repr__(self):
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self.raise_exc("__repr__")
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class BrokenObj:
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def __init__(self, exc):
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self.exc = exc
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def __repr__(self):
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raise self.exc
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__str__ = __repr__
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baseexc_str = BaseException("__str__")
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obj = BrokenObj(RaisingOnStrRepr([BaseException]))
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assert saferepr(obj) == (
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"<[unpresentable exception ({!r}) "
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"raised in repr()] BrokenObj object at 0x{:x}>".format(baseexc_str, id(obj))
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)
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obj = BrokenObj(RaisingOnStrRepr([RaisingOnStrRepr([BaseException])]))
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assert saferepr(obj) == (
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"<[{!r} raised in repr()] BrokenObj object at 0x{:x}>".format(
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baseexc_str, id(obj)
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)
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)
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with pytest.raises(KeyboardInterrupt):
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saferepr(BrokenObj(KeyboardInterrupt()))
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with pytest.raises(SystemExit):
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saferepr(BrokenObj(SystemExit()))
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with pytest.raises(KeyboardInterrupt):
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saferepr(BrokenObj(RaisingOnStrRepr([KeyboardInterrupt])))
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with pytest.raises(SystemExit):
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saferepr(BrokenObj(RaisingOnStrRepr([SystemExit])))
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with pytest.raises(KeyboardInterrupt):
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print(saferepr(BrokenObj(RaisingOnStrRepr([BaseException, KeyboardInterrupt]))))
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with pytest.raises(SystemExit):
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saferepr(BrokenObj(RaisingOnStrRepr([BaseException, SystemExit])))
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def test_buggy_builtin_repr():
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# Simulate a case where a repr for a builtin raises.
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# reprlib dispatches by type name, so use "int".
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class int:
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def __repr__(self):
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raise ValueError("Buggy repr!")
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assert "Buggy" in saferepr(int())
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def test_big_repr():
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from _pytest._io.saferepr import SafeRepr
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assert len(saferepr(range(1000))) <= len("[" + SafeRepr(0).maxlist * "1000" + "]")
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def test_repr_on_newstyle():
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class Function:
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def __repr__(self):
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return "<%s>" % (self.name)
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assert saferepr(Function())
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def test_unicode():
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val = "£€"
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reprval = "'£€'"
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assert saferepr(val) == reprval
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def test_pformat_dispatch():
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assert _pformat_dispatch("a") == "'a'"
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assert _pformat_dispatch("a" * 10, width=5) == "'aaaaaaaaaa'"
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assert _pformat_dispatch("foo bar", width=5) == "('foo '\n 'bar')"
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def test_broken_getattribute():
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"""saferepr() can create proper representations of classes with
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broken __getattribute__ (#7145)
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"""
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class SomeClass:
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def __getattribute__(self, attr):
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raise RuntimeError
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def __repr__(self):
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raise RuntimeError
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assert saferepr(SomeClass()).startswith(
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"<[RuntimeError() raised in repr()] SomeClass object at 0x"
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)
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