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How to use scan_once method in autotest
Best Python code snippet using autotest_python
decoder.py
Source:decoder.py 
...139 end = _w(s, end + 1).end()140 except IndexError:141 pass142 try:143 value, end = scan_once(s, end)144 except StopIteration:145 raise ValueError(errmsg('Expecting object', s, end))146 pairs_append((key, value))147 try:148 nextchar = s[end]149 if nextchar in _ws:150 end = _w(s, end + 1).end()151 nextchar = s[end]152 except IndexError:153 nextchar = ''154 end += 1155 if nextchar == '}':156 break157 elif nextchar != ',':158 raise ValueError(errmsg("Expecting ',' delimiter", s, end - 1))159 try:160 nextchar = s[end]161 if nextchar in _ws:162 end += 1163 nextchar = s[end]164 if nextchar in _ws:165 end = _w(s, end + 1).end()166 nextchar = s[end]167 except IndexError:168 nextchar = ''169 end += 1170 if nextchar != '"':171 raise ValueError(errmsg('Expecting property name enclosed in double quotes', s, end - 1))172 if object_pairs_hook is not None:173 result = object_pairs_hook(pairs)174 return (result, end)175 else:176 pairs = dict(pairs)177 if object_hook is not None:178 pairs = object_hook(pairs)179 return (pairs, end)180def JSONArray(s_and_end, scan_once, _w=WHITESPACE.match, _ws=WHITESPACE_STR):181 s, end = s_and_end182 values = []183 nextchar = s[end:end + 1]184 if nextchar in _ws:185 end = _w(s, end + 1).end()186 nextchar = s[end:end + 1]187 if nextchar == ']':188 return (values, end + 1)189 _append = values.append190 while True:191 try:192 value, end = scan_once(s, end)193 except StopIteration:194 raise ValueError(errmsg('Expecting object', s, end))195 _append(value)196 nextchar = s[end:end + 1]197 if nextchar in _ws:198 end = _w(s, end + 1).end()199 nextchar = s[end:end + 1]200 end += 1201 if nextchar == ']':202 break203 elif nextchar != ',':204 raise ValueError(errmsg("Expecting ',' delimiter", s, end))205 try:206 if s[end] in _ws:207 end += 1208 if s[end] in _ws:209 end = _w(s, end + 1).end()210 except IndexError:211 pass212 return (values, end)213class JSONDecoder(object):214 def __init__(self, encoding=None, object_hook=None, parse_float=None, parse_int=None, parse_constant=None, strict=True, object_pairs_hook=None):215 self.encoding = encoding216 self.object_hook = object_hook217 self.object_pairs_hook = object_pairs_hook218 self.parse_float = parse_float or float219 self.parse_int = parse_int or int220 self.parse_constant = parse_constant or _CONSTANTS.__getitem__221 self.strict = strict222 self.parse_object = JSONObject223 self.parse_array = JSONArray224 self.parse_string = scanstring225 self.scan_once = scanner.make_scanner(self)226 def decode(self, s, _w=WHITESPACE.match):227 obj, end = self.raw_decode(s, idx=_w(s, 0).end())228 end = _w(s, end).end()229 if end != len(s):230 raise ValueError(errmsg('Extra data', s, end, len(s)))231 return obj232 def raw_decode(self, s, idx=0):233 try:234 obj, end = self.scan_once(s, idx)235 except StopIteration:236 raise ValueError('No JSON object could be decoded')...
test_scanner.py
Source:test_scanner.py
...4# Purpose: Performs unit testing on the simplejson.scanner module.5# NOTES:6"""7 -- Removed test cases 0089, 0090, and 0091 as they are8 redundant since _scan_once() is called by the scan_once()9 function anyway.10"""11from unittest import TestCase12import simplejson.decoder as decoder13import simplejson.errors as errors14import simplejson.scanner as scanner15class ScannerContext(object):16 """Defines a context object utilized by several test17 classes to configure a scanner.18 """19 def __init__(self, parse_object=decoder.JSONObject,20 parse_array=decoder.JSONArray,21 parse_string=decoder.scanstring,22 match_number=scanner.NUMBER_RE.match, encoding=None,23 strict=True, parse_float=None, parse_int=None,24 parse_constant=None, object_hook=None,25 object_pairs_hook=None, memo={}):26 """Returns an instance of a ScannerContext object.27 Args:28 Returns:29 (ScannerContext): A ScannerContext object.30 """31 self.parse_object = parse_object32 self.parse_array = parse_array33 self.parse_string = parse_string34 self.match_number = match_number35 self.encoding = encoding36 self.strict = strict37 self.parse_float = parse_float38 self.parse_int = parse_int39 self.parse_constant = parse_constant40 self.object_hook = object_hook41 self.object_pairs_hook = object_pairs_hook42 self.memo = memo43class TestScanner(TestCase):44 """Implements unit testing on the simplejson.scanner module.45 The tests performed by this module make sane attempts to be46 as thorough as possible but are not exhaustive.47 """48 def test_make_scanner_correct(self):49 """50 Description: Ensures that the py_make_scanner() function51 correctly configures the scan_once() function with52 the correct parameters.53 Input: A context containing default values for each54 member.55 Output: An instance of the py_make_scanner:scan_once()56 function.57 Test Case: Corresponds to test case TEST-0087.58 """59 context = ScannerContext()60 scan_once = scanner.py_make_scanner(context)61 # TODO: Perform testing here62 def test_make_scanner_none(self):63 """64 Description: Ensures that the py_make_scanner() function65 errors out when given a None type context parameter.66 Input:67 This test case accepts no input.68 Output:69 (Error)70 Test Case: Corresponds to test case TEST-0088.71 """72 context = None73 self.assertRaises(74 TypeError, # should raise a TypeError75 scanner.py_make_scanner,76 context77 )78 def test_make_scanner_scan_once_correct(self):79 """80 Description: Tests that the py_make_scanner:scan_once()81 function properly scans a JSON token given correct82 parameters.83 Input:84 (str, int): ("["abc", "def", "ghi"]", 0)85 Output:86 (list): ["abc", "def", "ghi"]87 Test Case: Corresponds to test case TEST-0092.88 """89 test_input = "[\"abc\", \"def\", \"ghi\"]"90 test_output = ["abc", "def", "ghi"]91 context = ScannerContext()92 scan_once = scanner.py_make_scanner(context)93 output, _ = scan_once(test_input, 0)94 self.assertEqual(output, test_output)95 def test_make_scanner_scan_once_none(self):96 """97 Description: Tests that the py_make_scanner:scan_once()98 function errors out when given a None type as the input99 string.100 Input:101 (None, int): (None, 0)102 Output:103 (JSONDecodeError)104 Test Case: Corresponds to test case TEST-0093.105 """106 test_input = (None, 0)107 context = ScannerContext()108 scan_once = scanner.py_make_scanner(context)109 self.assertRaises(110 errors.JSONDecodeError,111 scan_once,112 test_input[0],113 test_input[1]114 )115 def test_make_scanner_scan_once_iindex(self):116 """117 Description: Tests that the py_make_scanner:scan_once()118 function errors out when given a valid JSON string as the119 input string and an invalid index.120 Input:121 (str, int): ("["abc", "def", "ghi"]", -1)122 Output:123 (JSONDecodeError)124 Test Case: Corresponds to test case TEST-0094.125 """126 test_input = ("[\"abc\", \"def\", \"ghi\"]", -1)127 context = ScannerContext()128 scan_once = scanner.py_make_scanner(context)129 self.assertRaises(130 errors.JSONDecodeError,131 scan_once,...
standard.py
Source:standard.py
1# -*- coding: utf-8 -*-2#3# Copyright (c) 2021~2999 - Cologler <skyoflw@gmail.com>4# ----------5#6# ----------7import re8from json import JSONDecoder9class StringPlugin:10 def make_scanner(self, context: JSONDecoder):11 parse_string = context.parse_string12 strict = context.strict13 def match(s, idx, nextchar):14 return nextchar == '"'15 def parse(m, s, idx, scan_once):16 return parse_string(s, idx + 1, strict)17 return match, parse18class ObjectPlugin:19 def make_scanner(self, context: JSONDecoder):20 parse_object = context.parse_object21 strict = context.strict22 object_hook = context.object_hook23 object_pairs_hook = context.object_pairs_hook24 memo = context.memo25 def match(s, idx, nextchar):26 return nextchar == '{'27 def parse(m, s, idx, scan_once):28 return parse_object((s, idx + 1), strict,29 scan_once, object_hook, object_pairs_hook, memo)30 return match, parse31class ArrayPlugin:32 def make_scanner(self, context: JSONDecoder):33 parse_array = context.parse_array34 def match(s, idx, nextchar):35 return nextchar == '['36 def parse(m, s, idx, scan_once):37 return parse_array((s, idx + 1), scan_once)38 return match, parse39class NullPlugin:40 def make_scanner(self, context: JSONDecoder):41 def match(s, idx, nextchar):42 return nextchar == 'n' and s[idx:idx + 4] == 'null'43 def parse(m, s, idx, scan_once):44 return None, idx + 445 return match, parse46class TruePlugin:47 def make_scanner(self, context: JSONDecoder):48 def match(s, idx, nextchar):49 return nextchar == 't' and s[idx:idx + 4] == 'true'50 def parse(m, s, idx, scan_once):51 return True, idx + 452 return match, parse53class FalsePlugin:54 def make_scanner(self, context: JSONDecoder):55 def match(s, idx, nextchar):56 return nextchar == 'f' and s[idx:idx + 5] == 'false'57 def parse(m, s, idx, scan_once):58 return False, idx + 559 return match, parse60class NumberPlugin:61 # copy from cpython\Lib\json\scanner.py62 _NUMBER_RE = re.compile(63 r'(-?(?:0|[1-9]\d*))(\.\d+)?([eE][-+]?\d+)?',64 (re.VERBOSE | re.MULTILINE | re.DOTALL))65 def make_scanner(self, context: JSONDecoder):66 match_number = self._NUMBER_RE.match67 parse_float = context.parse_float68 parse_int = context.parse_int69 def match(s, idx, nextchar):70 return match_number(s, idx)71 def parse(m, s, idx, scan_once):72 integer, frac, exp = m.groups()73 if frac or exp:74 res = parse_float(integer + (frac or '') + (exp or ''))75 else:76 res = parse_int(integer)77 return res, m.end()78 return match, parse79SPEC_PLUGINS = (80 StringPlugin(),81 ObjectPlugin(),82 ArrayPlugin(),83 NullPlugin(),84 TruePlugin(),85 FalsePlugin(),86 NumberPlugin(),87)88class NaNPlugin:89 def make_scanner(self, context: JSONDecoder):90 parse_constant = context.parse_constant91 def match(s, idx, nextchar):92 return nextchar == 'N' and s[idx:idx + 3] == 'NaN'93 def parse(m, s, idx, scan_once):94 return parse_constant('NaN'), idx + 395 return match, parse96class InfinityPlugin:97 def make_scanner(self, context: JSONDecoder):98 parse_constant = context.parse_constant99 def match(s, idx, nextchar):100 return nextchar == 'I' and s[idx:idx + 8] == 'Infinity'101 def parse(m, s, idx, scan_once):102 return parse_constant('Infinity'), idx + 8103 return match, parse104class NegInfinityPlugin:105 def make_scanner(self, context: JSONDecoder):106 parse_constant = context.parse_constant107 def match(s, idx, nextchar):108 return nextchar == '-' and s[idx:idx + 9] == '-Infinity'109 def parse(m, s, idx, scan_once):110 return parse_constant('-Infinity'), idx + 9111 return match, parse112STANDARD_PLUGINS = SPEC_PLUGINS + (113 NaNPlugin(),114 InfinityPlugin(),115 NegInfinityPlugin(),...
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