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cpython/Lib/test/test_json/test_fail.py

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from test.test_json import PyTest, CTest
# 2007-10-05
JSONDOCS = [
# https://json.org/JSON_checker/test/fail1.json
'"A JSON payload should be an object or array, not a string."',
# https://json.org/JSON_checker/test/fail2.json
'["Unclosed array"',
# https://json.org/JSON_checker/test/fail3.json
'{unquoted_key: "keys must be quoted"}',
# https://json.org/JSON_checker/test/fail4.json
'["extra comma",]',
# https://json.org/JSON_checker/test/fail5.json
'["double extra comma",,]',
# https://json.org/JSON_checker/test/fail6.json
'[ , "<-- missing value"]',
# https://json.org/JSON_checker/test/fail7.json
'["Comma after the close"],',
# https://json.org/JSON_checker/test/fail8.json
'["Extra close"]]',
# https://json.org/JSON_checker/test/fail9.json
'{"Extra comma": true,}',
# https://json.org/JSON_checker/test/fail10.json
'{"Extra value after close": true} "misplaced quoted value"',
# https://json.org/JSON_checker/test/fail11.json
'{"Illegal expression": 1 + 2}',
# https://json.org/JSON_checker/test/fail12.json
'{"Illegal invocation": alert()}',
# https://json.org/JSON_checker/test/fail13.json
'{"Numbers cannot have leading zeroes": 013}',
# https://json.org/JSON_checker/test/fail14.json
'{"Numbers cannot be hex": 0x14}',
# https://json.org/JSON_checker/test/fail15.json
'["Illegal backslash escape: \\x15"]',
# https://json.org/JSON_checker/test/fail16.json
'[\\naked]',
# https://json.org/JSON_checker/test/fail17.json
'["Illegal backslash escape: \\017"]',
# https://json.org/JSON_checker/test/fail18.json
'[[[[[[[[[[[[[[[[[[[["Too deep"]]]]]]]]]]]]]]]]]]]]',
# https://json.org/JSON_checker/test/fail19.json
'{"Missing colon" null}',
# https://json.org/JSON_checker/test/fail20.json
'{"Double colon":: null}',
# https://json.org/JSON_checker/test/fail21.json
'{"Comma instead of colon", null}',
# https://json.org/JSON_checker/test/fail22.json
'["Colon instead of comma": false]',
# https://json.org/JSON_checker/test/fail23.json
'["Bad value", truth]',
# https://json.org/JSON_checker/test/fail24.json
"['single quote']",
# https://json.org/JSON_checker/test/fail25.json
'["\ttab\tcharacter\tin\tstring\t"]',
# https://json.org/JSON_checker/test/fail26.json
'["tab\\ character\\ in\\ string\\ "]',
# https://json.org/JSON_checker/test/fail27.json
'["line\nbreak"]',
# https://json.org/JSON_checker/test/fail28.json
'["line\\\nbreak"]',
# https://json.org/JSON_checker/test/fail29.json
'[0e]',
# https://json.org/JSON_checker/test/fail30.json
'[0e+]',
# https://json.org/JSON_checker/test/fail31.json
'[0e+-1]',
# https://json.org/JSON_checker/test/fail32.json
'{"Comma instead if closing brace": true,',
# https://json.org/JSON_checker/test/fail33.json
'["mismatch"}',
# https://code.google.com/archive/p/simplejson/issues/3
'["A\u001FZ control characters in string"]',
]
SKIPS = {
1: "why not have a string payload?",
18: "spec doesn't specify any nesting limitations",
}
class TestFail:
def test_failures(self):
for idx, doc in enumerate(JSONDOCS):
idx = idx + 1
if idx in SKIPS:
self.loads(doc)
continue
try:
self.loads(doc)
except self.JSONDecodeError:
pass
else:
self.fail(f"Expected failure for fail{idx}.json: {doc!r}")
def test_non_string_keys_dict(self):
data = {'a' : 1, (1, 2) : 2}
with self.assertRaisesRegex(TypeError,
'keys must be str, int, float, bool or None, not tuple'):
self.dumps(data)
def test_not_serializable(self):
import sys
with self.assertRaisesRegex(TypeError,
'Object of type module is not JSON serializable') as cm:
self.dumps(sys)
self.assertFalse(hasattr(cm.exception, '__notes__'))
with self.assertRaises(TypeError) as cm:
self.dumps([1, [2, 3, sys]])
self.assertEqual(cm.exception.__notes__,
['when serializing list item 2',
'when serializing list item 1'])
with self.assertRaises(TypeError) as cm:
self.dumps((1, (2, 3, sys)))
self.assertEqual(cm.exception.__notes__,
['when serializing tuple item 2',
'when serializing tuple item 1'])
with self.assertRaises(TypeError) as cm:
self.dumps({'a': {'b': sys}})
self.assertEqual(cm.exception.__notes__,
["when serializing dict item 'b'",
"when serializing dict item 'a'"])
def test_truncated_input(self):
test_cases = [
('', 'Expecting value', 0),
('[', 'Expecting value', 1),
('[42', "Expecting ',' delimiter", 3),
('[42,', 'Expecting value', 4),
('["', 'Unterminated string starting at', 1),
('["spam', 'Unterminated string starting at', 1),
('["spam"', "Expecting ',' delimiter", 7),
('["spam",', 'Expecting value', 8),
('{', 'Expecting property name enclosed in double quotes', 1),
('{"', 'Unterminated string starting at', 1),
('{"spam', 'Unterminated string starting at', 1),
('{"spam"', "Expecting ':' delimiter", 7),
('{"spam":', 'Expecting value', 8),
('{"spam":42', "Expecting ',' delimiter", 10),
('{"spam":42,', 'Expecting property name enclosed in double quotes', 11),
]
test_cases += [
('"', 'Unterminated string starting at', 0),
('"spam', 'Unterminated string starting at', 0),
]
for data, msg, idx in test_cases:
with self.assertRaises(self.JSONDecodeError) as cm:
self.loads(data)
err = cm.exception
self.assertEqual(err.msg, msg)
self.assertEqual(err.pos, idx)
self.assertEqual(err.lineno, 1)
self.assertEqual(err.colno, idx + 1)
self.assertEqual(str(err),
'%s: line 1 column %d (char %d)' %
(msg, idx + 1, idx))
def test_unexpected_data(self):
test_cases = [
('[,', 'Expecting value', 1),
('{"spam":[}', 'Expecting value', 9),
('[42:', "Expecting ',' delimiter", 3),
('[42 "spam"', "Expecting ',' delimiter", 4),
('[42,]', "Illegal trailing comma before end of array", 3),
('{"spam":[42}', "Expecting ',' delimiter", 11),
('["]', 'Unterminated string starting at', 1),
('["spam":', "Expecting ',' delimiter", 7),
('["spam",]', "Illegal trailing comma before end of array", 7),
('{:', 'Expecting property name enclosed in double quotes', 1),
('{,', 'Expecting property name enclosed in double quotes', 1),
('{42', 'Expecting property name enclosed in double quotes', 1),
('[{]', 'Expecting property name enclosed in double quotes', 2),
('{"spam",', "Expecting ':' delimiter", 7),
('{"spam"}', "Expecting ':' delimiter", 7),
('[{"spam"]', "Expecting ':' delimiter", 8),
('{"spam":}', 'Expecting value', 8),
('[{"spam":]', 'Expecting value', 9),
('{"spam":42 "ham"', "Expecting ',' delimiter", 11),
('[{"spam":42]', "Expecting ',' delimiter", 11),
('{"spam":42,}', "Illegal trailing comma before end of object", 10),
('{"spam":42 , }', "Illegal trailing comma before end of object", 11),
('[123 , ]', "Illegal trailing comma before end of array", 6),
]
for data, msg, idx in test_cases:
with self.assertRaises(self.JSONDecodeError) as cm:
self.loads(data)
err = cm.exception
self.assertEqual(err.msg, msg)
self.assertEqual(err.pos, idx)
self.assertEqual(err.lineno, 1)
self.assertEqual(err.colno, idx + 1)
self.assertEqual(str(err),
'%s: line 1 column %d (char %d)' %
(msg, idx + 1, idx))
def test_extra_data(self):
test_cases = [
('[]]', 'Extra data', 2),
('{}}', 'Extra data', 2),
('[],[]', 'Extra data', 2),
('{},{}', 'Extra data', 2),
]
test_cases += [
('42,"spam"', 'Extra data', 2),
('"spam",42', 'Extra data', 6),
]
for data, msg, idx in test_cases:
with self.assertRaises(self.JSONDecodeError) as cm:
self.loads(data)
err = cm.exception
self.assertEqual(err.msg, msg)
self.assertEqual(err.pos, idx)
self.assertEqual(err.lineno, 1)
self.assertEqual(err.colno, idx + 1)
self.assertEqual(str(err),
'%s: line 1 column %d (char %d)' %
(msg, idx + 1, idx))
def test_linecol(self):
test_cases = [
('!', 1, 1, 0),
(' !', 1, 2, 1),
('\n!', 2, 1, 1),
('\n \n\n !', 4, 6, 10),
]
for data, line, col, idx in test_cases:
with self.assertRaises(self.JSONDecodeError) as cm:
self.loads(data)
err = cm.exception
self.assertEqual(err.msg, 'Expecting value')
self.assertEqual(err.pos, idx)
self.assertEqual(err.lineno, line)
self.assertEqual(err.colno, col)
self.assertEqual(str(err),
'Expecting value: line %s column %d (char %d)' %
(line, col, idx))
class TestPyFail(TestFail, PyTest): pass
class TestCFail(TestFail, CTest): pass
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