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[youtubedl] / test / helper.py
1 import errno
2 import io
3 import hashlib
4 import json
5 import os.path
6 import re
7 import types
8 import sys
9
10 import youtube_dl.extractor
11 from youtube_dl import YoutubeDL
12 from youtube_dl.utils import (
13 compat_str,
14 preferredencoding,
15 )
16
17
18 def get_params(override=None):
19 PARAMETERS_FILE = os.path.join(os.path.dirname(os.path.abspath(__file__)),
20 "parameters.json")
21 with io.open(PARAMETERS_FILE, encoding='utf-8') as pf:
22 parameters = json.load(pf)
23 if override:
24 parameters.update(override)
25 return parameters
26
27
28 def try_rm(filename):
29 """ Remove a file if it exists """
30 try:
31 os.remove(filename)
32 except OSError as ose:
33 if ose.errno != errno.ENOENT:
34 raise
35
36
37 def report_warning(message):
38 '''
39 Print the message to stderr, it will be prefixed with 'WARNING:'
40 If stderr is a tty file the 'WARNING:' will be colored
41 '''
42 if sys.stderr.isatty() and os.name != 'nt':
43 _msg_header = u'\033[0;33mWARNING:\033[0m'
44 else:
45 _msg_header = u'WARNING:'
46 output = u'%s %s\n' % (_msg_header, message)
47 if 'b' in getattr(sys.stderr, 'mode', '') or sys.version_info[0] < 3:
48 output = output.encode(preferredencoding())
49 sys.stderr.write(output)
50
51
52 class FakeYDL(YoutubeDL):
53 def __init__(self, override=None):
54 # Different instances of the downloader can't share the same dictionary
55 # some test set the "sublang" parameter, which would break the md5 checks.
56 params = get_params(override=override)
57 super(FakeYDL, self).__init__(params)
58 self.result = []
59
60 def to_screen(self, s, skip_eol=None):
61 print(s)
62
63 def trouble(self, s, tb=None):
64 raise Exception(s)
65
66 def download(self, x):
67 self.result.append(x)
68
69 def expect_warning(self, regex):
70 # Silence an expected warning matching a regex
71 old_report_warning = self.report_warning
72 def report_warning(self, message):
73 if re.match(regex, message): return
74 old_report_warning(message)
75 self.report_warning = types.MethodType(report_warning, self)
76
77
78 def gettestcases(include_onlymatching=False):
79 for ie in youtube_dl.extractor.gen_extractors():
80 t = getattr(ie, '_TEST', None)
81 if t:
82 assert not hasattr(ie, '_TESTS'), \
83 '%s has _TEST and _TESTS' % type(ie).__name__
84 tests = [t]
85 else:
86 tests = getattr(ie, '_TESTS', [])
87 for t in tests:
88 if not include_onlymatching and t.get('only_matching', False):
89 continue
90 t['name'] = type(ie).__name__[:-len('IE')]
91 yield t
92
93
94 md5 = lambda s: hashlib.md5(s.encode('utf-8')).hexdigest()
95
96
97 def expect_info_dict(self, expected_dict, got_dict):
98 for info_field, expected in expected_dict.items():
99 if isinstance(expected, compat_str) and expected.startswith('re:'):
100 got = got_dict.get(info_field)
101 match_str = expected[len('re:'):]
102 match_rex = re.compile(match_str)
103
104 self.assertTrue(
105 isinstance(got, compat_str) and match_rex.match(got),
106 u'field %s (value: %r) should match %r' % (info_field, got, match_str))
107 elif isinstance(expected, type):
108 got = got_dict.get(info_field)
109 self.assertTrue(isinstance(got, expected),
110 u'Expected type %r for field %s, but got value %r of type %r' % (expected, info_field, got, type(got)))
111 else:
112 if isinstance(expected, compat_str) and expected.startswith('md5:'):
113 got = 'md5:' + md5(got_dict.get(info_field))
114 else:
115 got = got_dict.get(info_field)
116 self.assertEqual(expected, got,
117 u'invalid value for field %s, expected %r, got %r' % (info_field, expected, got))
118
119 # Check for the presence of mandatory fields
120 for key in ('id', 'url', 'title', 'ext'):
121 self.assertTrue(got_dict.get(key), 'Missing mandatory field %s' % key)
122 # Check for mandatory fields that are automatically set by YoutubeDL
123 for key in ['webpage_url', 'extractor', 'extractor_key']:
124 self.assertTrue(got_dict.get(key), u'Missing field: %s' % key)
125
126 # Are checkable fields missing from the test case definition?
127 test_info_dict = dict((key, value if not isinstance(value, compat_str) or len(value) < 250 else 'md5:' + md5(value))
128 for key, value in got_dict.items()
129 if value and key in ('title', 'description', 'uploader', 'upload_date', 'timestamp', 'uploader_id', 'location'))
130 missing_keys = set(test_info_dict.keys()) - set(expected_dict.keys())
131 if missing_keys:
132 sys.stderr.write(u'\n"info_dict": ' + json.dumps(test_info_dict, ensure_ascii=False, indent=4) + u'\n')
133 self.assertFalse(
134 missing_keys,
135 'Missing keys in test definition: %s' % (
136 ', '.join(sorted(missing_keys))))
137
138
139 def assertRegexpMatches(self, text, regexp, msg=None):
140 if hasattr(self, 'assertRegexp'):
141 return self.assertRegexp(text, regexp, msg)
142 else:
143 m = re.match(regexp, text)
144 if not m:
145 note = 'Regexp didn\'t match: %r not found in %r' % (regexp, text)
146 if msg is None:
147 msg = note
148 else:
149 msg = note + ', ' + msg
150 self.assertTrue(m, msg)
151
152
153 def assertGreaterEqual(self, got, expected, msg=None):
154 if not (got >= expected):
155 if msg is None:
156 msg = '%r not greater than or equal to %r' % (got, expected)
157 self.assertTrue(got >= expected, msg)