75 lines
2.8 KiB
Python
75 lines
2.8 KiB
Python
import decimal
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from unittest import TestCase
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from io import StringIO
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from contextlib import contextmanager
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import json
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import json.decoder
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import json.scanner
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from collections import OrderedDict
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@contextmanager
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def use_python_scanner():
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py_scanner = json.scanner.py_make_scanner
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old_scanner = json.decoder.make_scanner
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json.decoder.make_scanner = py_scanner
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try:
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yield
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finally:
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json.decoder.make_scanner = old_scanner
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class TestDecode(TestCase):
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def test_decimal(self):
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rval = json.loads('1.1', parse_float=decimal.Decimal)
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self.assertTrue(isinstance(rval, decimal.Decimal))
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self.assertEqual(rval, decimal.Decimal('1.1'))
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def test_float(self):
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rval = json.loads('1', parse_int=float)
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self.assertTrue(isinstance(rval, float))
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self.assertEqual(rval, 1.0)
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def test_empty_objects(self):
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self.assertEqual(json.loads('{}'), {})
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self.assertEqual(json.loads('[]'), [])
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self.assertEqual(json.loads('""'), "")
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def test_object_pairs_hook(self):
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s = '{"xkd":1, "kcw":2, "art":3, "hxm":4, "qrt":5, "pad":6, "hoy":7}'
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p = [("xkd", 1), ("kcw", 2), ("art", 3), ("hxm", 4),
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("qrt", 5), ("pad", 6), ("hoy", 7)]
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self.assertEqual(json.loads(s), eval(s))
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self.assertEqual(json.loads(s, object_pairs_hook = lambda x: x), p)
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self.assertEqual(json.load(StringIO(s),
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object_pairs_hook=lambda x: x), p)
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od = json.loads(s, object_pairs_hook = OrderedDict)
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self.assertEqual(od, OrderedDict(p))
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self.assertEqual(type(od), OrderedDict)
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# the object_pairs_hook takes priority over the object_hook
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self.assertEqual(json.loads(s,
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object_pairs_hook = OrderedDict,
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object_hook = lambda x: None),
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OrderedDict(p))
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def test_decoder_optimizations(self):
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# Several optimizations were made that skip over calls to
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# the whitespace regex, so this test is designed to try and
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# exercise the uncommon cases. The array cases are already covered.
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rval = json.loads('{ "key" : "value" , "k":"v" }')
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self.assertEqual(rval, {"key":"value", "k":"v"})
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def check_keys_reuse(self, source, loads):
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rval = loads(source)
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(a, b), (c, d) = sorted(rval[0]), sorted(rval[1])
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self.assertIs(a, c)
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self.assertIs(b, d)
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def test_keys_reuse(self):
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s = '[{"a_key": 1, "b_\xe9": 2}, {"a_key": 3, "b_\xe9": 4}]'
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self.check_keys_reuse(s, json.loads)
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# Disabled: the pure Python version of json simply doesn't work
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with use_python_scanner():
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self.check_keys_reuse(s, json.decoder.JSONDecoder().decode)
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