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