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