test/helper.py

   1 from __future__ import unicode_literals
   2
   3 import errno
   4 import io
   5 import hashlib
   6 import json
   7 import os.path
   8 import re
   9 import types
  10 import sys
  11
  12 import youtube_dl.extractor
  13 from youtube_dl import YoutubeDL
  14 from youtube_dl.compat import (
  15     compat_os_name,
  16     compat_str,
  17 )
  18 from youtube_dl.utils import (
  19     preferredencoding,
  20     write_string,
  21 )
  22
  23
  24 def get_params(override=None):
  25     PARAMETERS_FILE = os.path.join(os.path.dirname(os.path.abspath(__file__)),
  26                                    "parameters.json")
  27     with io.open(PARAMETERS_FILE, encoding='utf-8') as pf:
  28         parameters = json.load(pf)
  29     if override:
  30         parameters.update(override)
  31     return parameters
  32
  33
  34 def try_rm(filename):
  35     """ Remove a file if it exists """
  36     try:
  37         os.remove(filename)
  38     except OSError as ose:
  39         if ose.errno != errno.ENOENT:
  40             raise
  41
  42
  43 def report_warning(message):
  44     '''
  45     Print the message to stderr, it will be prefixed with 'WARNING:'
  46     If stderr is a tty file the 'WARNING:' will be colored
  47     '''
  48     if sys.stderr.isatty() and compat_os_name != 'nt':
  49         _msg_header = '\033[0;33mWARNING:\033[0m'
  50     else:
  51         _msg_header = 'WARNING:'
  52     output = '%s %s\n' % (_msg_header, message)
  53     if 'b' in getattr(sys.stderr, 'mode', '') or sys.version_info[0] < 3:
  54         output = output.encode(preferredencoding())
  55     sys.stderr.write(output)
  56
  57
  58 class FakeYDL(YoutubeDL):
  59     def __init__(self, override=None):
  60         # Different instances of the downloader can't share the same dictionary
  61         # some test set the "sublang" parameter, which would break the md5 checks.
  62         params = get_params(override=override)
  63         super(FakeYDL, self).__init__(params, auto_init=False)
  64         self.result = []
  65
  66     def to_screen(self, s, skip_eol=None):
  67         print(s)
  68
  69     def trouble(self, s, tb=None):
  70         raise Exception(s)
  71
  72     def download(self, x):
  73         self.result.append(x)
  74
  75     def expect_warning(self, regex):
  76         # Silence an expected warning matching a regex
  77         old_report_warning = self.report_warning
  78
  79         def report_warning(self, message):
  80             if re.match(regex, message):
  81                 return
  82             old_report_warning(message)
  83         self.report_warning = types.MethodType(report_warning, self)
  84
  85
  86 def gettestcases(include_onlymatching=False):
  87     for ie in youtube_dl.extractor.gen_extractors():
  88         for tc in ie.get_testcases(include_onlymatching):
  89             yield tc
  90
  91
  92 md5 = lambda s: hashlib.md5(s.encode('utf-8')).hexdigest()
  93
  94
  95 def expect_value(self, got, expected, field):
  96     if isinstance(expected, compat_str) and expected.startswith('re:'):
  97         match_str = expected[len('re:'):]
  98         match_rex = re.compile(match_str)
  99
 100         self.assertTrue(
 101             isinstance(got, compat_str),
 102             'Expected a %s object, but got %s for field %s' % (
 103                 compat_str.__name__, type(got).__name__, field))
 104         self.assertTrue(
 105             match_rex.match(got),
 106             'field %s (value: %r) should match %r' % (field, got, match_str))
 107     elif isinstance(expected, compat_str) and expected.startswith('startswith:'):
 108         start_str = expected[len('startswith:'):]
 109         self.assertTrue(
 110             isinstance(got, compat_str),
 111             'Expected a %s object, but got %s for field %s' % (
 112                 compat_str.__name__, type(got).__name__, field))
 113         self.assertTrue(
 114             got.startswith(start_str),
 115             'field %s (value: %r) should start with %r' % (field, got, start_str))
 116     elif isinstance(expected, compat_str) and expected.startswith('contains:'):
 117         contains_str = expected[len('contains:'):]
 118         self.assertTrue(
 119             isinstance(got, compat_str),
 120             'Expected a %s object, but got %s for field %s' % (
 121                 compat_str.__name__, type(got).__name__, field))
 122         self.assertTrue(
 123             contains_str in got,
 124             'field %s (value: %r) should contain %r' % (field, got, contains_str))
 125     elif isinstance(expected, type):
 126         self.assertTrue(
 127             isinstance(got, expected),
 128             'Expected type %r for field %s, but got value %r of type %r' % (expected, field, got, type(got)))
 129     elif isinstance(expected, dict) and isinstance(got, dict):
 130         expect_dict(self, got, expected)
 131     elif isinstance(expected, list) and isinstance(got, list):
 132         self.assertEqual(
 133             len(expected), len(got),
 134             'Expect a list of length %d, but got a list of length %d for field %s' % (
 135                 len(expected), len(got), field))
 136         for index, (item_got, item_expected) in enumerate(zip(got, expected)):
 137             type_got = type(item_got)
 138             type_expected = type(item_expected)
 139             self.assertEqual(
 140                 type_expected, type_got,
 141                 'Type mismatch for list item at index %d for field %s, expected %r, got %r' % (
 142                     index, field, type_expected, type_got))
 143             expect_value(self, item_got, item_expected, field)
 144     else:
 145         if isinstance(expected, compat_str) and expected.startswith('md5:'):
 146             self.assertTrue(
 147                 isinstance(got, compat_str),
 148                 'Expected field %s to be a unicode object, but got value %r of type %r' % (field, got, type(got)))
 149             got = 'md5:' + md5(got)
 150         elif isinstance(expected, compat_str) and expected.startswith('mincount:'):
 151             self.assertTrue(
 152                 isinstance(got, (list, dict)),
 153                 'Expected field %s to be a list or a dict, but it is of type %s' % (
 154                     field, type(got).__name__))
 155             expected_num = int(expected.partition(':')[2])
 156             assertGreaterEqual(
 157                 self, len(got), expected_num,
 158                 'Expected %d items in field %s, but only got %d' % (expected_num, field, len(got)))
 159             return
 160         self.assertEqual(
 161             expected, got,
 162             'Invalid value for field %s, expected %r, got %r' % (field, expected, got))
 163
 164
 165 def expect_dict(self, got_dict, expected_dict):
 166     for info_field, expected in expected_dict.items():
 167         got = got_dict.get(info_field)
 168         expect_value(self, got, expected, info_field)
 169
 170
 171 def expect_info_dict(self, got_dict, expected_dict):
 172     expect_dict(self, got_dict, expected_dict)
 173     # Check for the presence of mandatory fields
 174     if got_dict.get('_type') not in ('playlist', 'multi_video'):
 175         for key in ('id', 'url', 'title', 'ext'):
 176             self.assertTrue(got_dict.get(key), 'Missing mandatory field %s' % key)
 177     # Check for mandatory fields that are automatically set by YoutubeDL
 178     for key in ['webpage_url', 'extractor', 'extractor_key']:
 179         self.assertTrue(got_dict.get(key), 'Missing field: %s' % key)
 180
 181     # Are checkable fields missing from the test case definition?
 182     test_info_dict = dict((key, value if not isinstance(value, compat_str) or len(value) < 250 else 'md5:' + md5(value))
 183                           for key, value in got_dict.items()
 184                           if value and key in ('id', 'title', 'description', 'uploader', 'upload_date', 'timestamp', 'uploader_id', 'location', 'age_limit'))
 185     missing_keys = set(test_info_dict.keys()) - set(expected_dict.keys())
 186     if missing_keys:
 187         def _repr(v):
 188             if isinstance(v, compat_str):
 189                 return "'%s'" % v.replace('\\', '\\\\').replace("'", "\\'").replace('\n', '\\n')
 190             else:
 191                 return repr(v)
 192         info_dict_str = ''
 193         if len(missing_keys) != len(expected_dict):
 194             info_dict_str += ''.join(
 195                 '    %s: %s,\n' % (_repr(k), _repr(v))
 196                 for k, v in test_info_dict.items() if k not in missing_keys)
 197
 198             if info_dict_str:
 199                 info_dict_str += '\n'
 200         info_dict_str += ''.join(
 201             '    %s: %s,\n' % (_repr(k), _repr(test_info_dict[k]))
 202             for k in missing_keys)
 203         write_string(
 204             '\n\'info_dict\': {\n' + info_dict_str + '},\n', out=sys.stderr)
 205         self.assertFalse(
 206             missing_keys,
 207             'Missing keys in test definition: %s' % (
 208                 ', '.join(sorted(missing_keys))))
 209
 210
 211 def assertRegexpMatches(self, text, regexp, msg=None):
 212     if hasattr(self, 'assertRegexp'):
 213         return self.assertRegexp(text, regexp, msg)
 214     else:
 215         m = re.match(regexp, text)
 216         if not m:
 217             note = 'Regexp didn\'t match: %r not found' % (regexp)
 218             if len(text) < 1000:
 219                 note += ' in %r' % text
 220             if msg is None:
 221                 msg = note
 222             else:
 223                 msg = note + ', ' + msg
 224             self.assertTrue(m, msg)
 225
 226
 227 def assertGreaterEqual(self, got, expected, msg=None):
 228     if not (got >= expected):
 229         if msg is None:
 230             msg = '%r not greater than or equal to %r' % (got, expected)
 231         self.assertTrue(got >= expected, msg)
 232
 233
 234 def expect_warnings(ydl, warnings_re):
 235     real_warning = ydl.report_warning
 236
 237     def _report_warning(w):
 238         if not any(re.search(w_re, w) for w_re in warnings_re):
 239             real_warning(w)
 240
 241     ydl.report_warning = _report_warning