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make exceptions repr tests Python 3.7-friendly by eval-repr round-trip #1117

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Merged
merged 3 commits into from
Jul 7, 2019
Merged

make exceptions repr tests Python 3.7-friendly by eval-repr round-trip #1117

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9fee59e
make exceptions repr tests Python 3.7-friendly by eval-repr round-trip
silmeth Jul 7, 2019
1b539de
move asserts out of round trip test utils
silmeth Jul 7, 2019
fe9e711
fix big int crash in json_snippets – actually use a big integer
silmeth Jul 7, 2019
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20 changes: 14 additions & 6 deletions tests/snippets/exceptions.py
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Original file line number Diff line number Diff line change
@@ -1,29 +1,37 @@
def exceptions_eq(e1, e2):
return type(e1) is type(e2) and e1.args == e2.args

def round_trip_repr(e):
return exceptions_eq(e, eval(repr(e)))

# KeyError
empty_exc = KeyError()
assert str(empty_exc) == ''
assert repr(empty_exc) == 'KeyError()'
assert round_trip_repr(empty_exc)
assert len(empty_exc.args) == 0
assert type(empty_exc.args) == tuple

exc = KeyError('message')
assert str(exc) == "'message'"
assert repr(exc) == "KeyError('message',)"
assert round_trip_repr(exc)

exc = KeyError('message', 'another message')
assert str(exc) == "('message', 'another message')"
assert repr(exc) == "KeyError('message', 'another message')"
assert round_trip_repr(exc)
assert exc.args[0] == 'message'
assert exc.args[1] == 'another message'

class A:
def __repr__(self):
return 'repr'
return 'A()'
def __str__(self):
return 'str'
def __eq__(self, other):
return type(other) is A

exc = KeyError(A())
assert str(exc) == 'repr'
assert repr(exc) == 'KeyError(repr,)'
assert str(exc) == 'A()'
assert round_trip_repr(exc)

# ImportError / ModuleNotFoundError
exc = ImportError()
Expand Down
8 changes: 4 additions & 4 deletions tests/snippets/json_snippet.py
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Original file line number Diff line number Diff line change
Expand Up @@ -5,7 +5,7 @@ def round_trip_test(obj):
# serde_json and Python's json module produce slightly differently spaced
# output; direct string comparison can't pass on both so we use this as a
# proxy
assert obj == json.loads(json.dumps(obj))
return obj == json.loads(json.dumps(obj))

assert '"string"' == json.dumps("string")
assert "1" == json.dumps(1)
Expand All @@ -17,7 +17,7 @@ def round_trip_test(obj):
assert '[]' == json.dumps([])
assert '[1]' == json.dumps([1])
assert '[[1]]' == json.dumps([[1]])
round_trip_test([1, "string", 1.0, True])
assert round_trip_test([1, "string", 1.0, True])

assert '[]' == json.dumps(())
assert '[1]' == json.dumps((1,))
Expand All @@ -26,7 +26,7 @@ def round_trip_test(obj):
assert [1, "string", 1.0, True] == json.loads(json.dumps((1, "string", 1.0, True)))

assert '{}' == json.dumps({})
round_trip_test({'a': 'b'})
assert round_trip_test({'a': 'b'})

# should reject non-str keys in jsons
assert_raises(json.JSONDecodeError, lambda: json.loads('{3: "abc"}'))
Expand Down Expand Up @@ -68,6 +68,6 @@ class Dict(dict): pass
# big ints should not crash VM
# TODO: test for correct output when actual serialization implemented and doesn’t throw
try:
json.dumps(7*500)
json.dumps(7**500)
except:
pass