diff options
Diffstat (limited to 'Lib/test/json_tests/test_decode.py')
-rw-r--r-- | Lib/test/json_tests/test_decode.py | 74 |
1 files changed, 74 insertions, 0 deletions
diff --git a/Lib/test/json_tests/test_decode.py b/Lib/test/json_tests/test_decode.py new file mode 100644 index 0000000000..07dadfe26f --- /dev/null +++ b/Lib/test/json_tests/test_decode.py @@ -0,0 +1,74 @@ +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.assertEqual(rval, decimal.Decimal('1.1')) + + def test_float(self): + rval = json.loads('1', parse_int=float) + self.assertTrue(isinstance(rval, float)) + self.assertEqual(rval, 1.0) + + def test_empty_objects(self): + self.assertEqual(json.loads('{}'), {}) + self.assertEqual(json.loads('[]'), []) + self.assertEqual(json.loads('""'), "") + + 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.assertEqual(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) |