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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.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 LOCAL_PARAMETERS_FILE = os.path.join(os.path.dirname(os.path.abspath(__file__)),
28 "local_parameters.json")
29 with io.open(PARAMETERS_FILE, encoding='utf-8') as pf:
30 parameters = json.load(pf)
31 if os.path.exists(LOCAL_PARAMETERS_FILE):
32 with io.open(LOCAL_PARAMETERS_FILE, encoding='utf-8') as pf:
33 parameters.update(json.load(pf))
34 if override:
35 parameters.update(override)
36 return parameters
37
38
39 def try_rm(filename):
40 """ Remove a file if it exists """
41 try:
42 os.remove(filename)
43 except OSError as ose:
44 if ose.errno != errno.ENOENT:
45 raise
46
47
48 def report_warning(message):
49 '''
50 Print the message to stderr, it will be prefixed with 'WARNING:'
51 If stderr is a tty file the 'WARNING:' will be colored
52 '''
53 if sys.stderr.isatty() and compat_os_name != 'nt':
54 _msg_header = '\033[0;33mWARNING:\033[0m'
55 else:
56 _msg_header = 'WARNING:'
57 output = '%s %s\n' % (_msg_header, message)
58 if 'b' in getattr(sys.stderr, 'mode', '') or sys.version_info[0] < 3:
59 output = output.encode(preferredencoding())
60 sys.stderr.write(output)
61
62
63 class FakeYDL(YoutubeDL):
64 def __init__(self, override=None):
65 # Different instances of the downloader can't share the same dictionary
66 # some test set the "sublang" parameter, which would break the md5 checks.
67 params = get_params(override=override)
68 super(FakeYDL, self).__init__(params, auto_init=False)
69 self.result = []
70
71 def to_screen(self, s, skip_eol=None):
72 print(s)
73
74 def trouble(self, s, tb=None):
75 raise Exception(s)
76
77 def download(self, x):
78 self.result.append(x)
79
80 def expect_warning(self, regex):
81 # Silence an expected warning matching a regex
82 old_report_warning = self.report_warning
83
84 def report_warning(self, message):
85 if re.match(regex, message):
86 return
87 old_report_warning(message)
88 self.report_warning = types.MethodType(report_warning, self)
89
90
91 def gettestcases(include_onlymatching=False):
92 for ie in youtube_dl.extractor.gen_extractors():
93 for tc in ie.get_testcases(include_onlymatching):
94 yield tc
95
96
97 md5 = lambda s: hashlib.md5(s.encode('utf-8')).hexdigest()
98
99
100 def expect_value(self, got, expected, field):
101 if isinstance(expected, compat_str) and expected.startswith('re:'):
102 match_str = expected[len('re:'):]
103 match_rex = re.compile(match_str)
104
105 self.assertTrue(
106 isinstance(got, compat_str),
107 'Expected a %s object, but got %s for field %s' % (
108 compat_str.__name__, type(got).__name__, field))
109 self.assertTrue(
110 match_rex.match(got),
111 'field %s (value: %r) should match %r' % (field, got, match_str))
112 elif isinstance(expected, compat_str) and expected.startswith('startswith:'):
113 start_str = expected[len('startswith:'):]
114 self.assertTrue(
115 isinstance(got, compat_str),
116 'Expected a %s object, but got %s for field %s' % (
117 compat_str.__name__, type(got).__name__, field))
118 self.assertTrue(
119 got.startswith(start_str),
120 'field %s (value: %r) should start with %r' % (field, got, start_str))
121 elif isinstance(expected, compat_str) and expected.startswith('contains:'):
122 contains_str = expected[len('contains:'):]
123 self.assertTrue(
124 isinstance(got, compat_str),
125 'Expected a %s object, but got %s for field %s' % (
126 compat_str.__name__, type(got).__name__, field))
127 self.assertTrue(
128 contains_str in got,
129 'field %s (value: %r) should contain %r' % (field, got, contains_str))
130 elif isinstance(expected, type):
131 self.assertTrue(
132 isinstance(got, expected),
133 'Expected type %r for field %s, but got value %r of type %r' % (expected, field, got, type(got)))
134 elif isinstance(expected, dict) and isinstance(got, dict):
135 expect_dict(self, got, expected)
136 elif isinstance(expected, list) and isinstance(got, list):
137 self.assertEqual(
138 len(expected), len(got),
139 'Expect a list of length %d, but got a list of length %d for field %s' % (
140 len(expected), len(got), field))
141 for index, (item_got, item_expected) in enumerate(zip(got, expected)):
142 type_got = type(item_got)
143 type_expected = type(item_expected)
144 self.assertEqual(
145 type_expected, type_got,
146 'Type mismatch for list item at index %d for field %s, expected %r, got %r' % (
147 index, field, type_expected, type_got))
148 expect_value(self, item_got, item_expected, field)
149 else:
150 if isinstance(expected, compat_str) and expected.startswith('md5:'):
151 self.assertTrue(
152 isinstance(got, compat_str),
153 'Expected field %s to be a unicode object, but got value %r of type %r' % (field, got, type(got)))
154 got = 'md5:' + md5(got)
155 elif isinstance(expected, compat_str) and expected.startswith('mincount:'):
156 self.assertTrue(
157 isinstance(got, (list, dict)),
158 'Expected field %s to be a list or a dict, but it is of type %s' % (
159 field, type(got).__name__))
160 expected_num = int(expected.partition(':')[2])
161 assertGreaterEqual(
162 self, len(got), expected_num,
163 'Expected %d items in field %s, but only got %d' % (expected_num, field, len(got)))
164 return
165 self.assertEqual(
166 expected, got,
167 'Invalid value for field %s, expected %r, got %r' % (field, expected, got))
168
169
170 def expect_dict(self, got_dict, expected_dict):
171 for info_field, expected in expected_dict.items():
172 got = got_dict.get(info_field)
173 expect_value(self, got, expected, info_field)
174
175
176 def expect_info_dict(self, got_dict, expected_dict):
177 expect_dict(self, got_dict, expected_dict)
178 # Check for the presence of mandatory fields
179 if got_dict.get('_type') not in ('playlist', 'multi_video'):
180 for key in ('id', 'url', 'title', 'ext'):
181 self.assertTrue(got_dict.get(key), 'Missing mandatory field %s' % key)
182 # Check for mandatory fields that are automatically set by YoutubeDL
183 for key in ['webpage_url', 'extractor', 'extractor_key']:
184 self.assertTrue(got_dict.get(key), 'Missing field: %s' % key)
185
186 # Are checkable fields missing from the test case definition?
187 test_info_dict = dict((key, value if not isinstance(value, compat_str) or len(value) < 250 else 'md5:' + md5(value))
188 for key, value in got_dict.items()
189 if value and key in ('id', 'title', 'description', 'uploader', 'upload_date', 'timestamp', 'uploader_id', 'location', 'age_limit'))
190 missing_keys = set(test_info_dict.keys()) - set(expected_dict.keys())
191 if missing_keys:
192 def _repr(v):
193 if isinstance(v, compat_str):
194 return "'%s'" % v.replace('\\', '\\\\').replace("'", "\\'").replace('\n', '\\n')
195 else:
196 return repr(v)
197 info_dict_str = ''
198 if len(missing_keys) != len(expected_dict):
199 info_dict_str += ''.join(
200 ' %s: %s,\n' % (_repr(k), _repr(v))
201 for k, v in test_info_dict.items() if k not in missing_keys)
202
203 if info_dict_str:
204 info_dict_str += '\n'
205 info_dict_str += ''.join(
206 ' %s: %s,\n' % (_repr(k), _repr(test_info_dict[k]))
207 for k in missing_keys)
208 write_string(
209 '\n\'info_dict\': {\n' + info_dict_str + '},\n', out=sys.stderr)
210 self.assertFalse(
211 missing_keys,
212 'Missing keys in test definition: %s' % (
213 ', '.join(sorted(missing_keys))))
214
215
216 def assertRegexpMatches(self, text, regexp, msg=None):
217 if hasattr(self, 'assertRegexp'):
218 return self.assertRegexp(text, regexp, msg)
219 else:
220 m = re.match(regexp, text)
221 if not m:
222 note = 'Regexp didn\'t match: %r not found' % (regexp)
223 if len(text) < 1000:
224 note += ' in %r' % text
225 if msg is None:
226 msg = note
227 else:
228 msg = note + ', ' + msg
229 self.assertTrue(m, msg)
230
231
232 def assertGreaterEqual(self, got, expected, msg=None):
233 if not (got >= expected):
234 if msg is None:
235 msg = '%r not greater than or equal to %r' % (got, expected)
236 self.assertTrue(got >= expected, msg)
237
238
239 def expect_warnings(ydl, warnings_re):
240 real_warning = ydl.report_warning
241
242 def _report_warning(w):
243 if not any(re.search(w_re, w) for w_re in warnings_re):
244 real_warning(w)
245
246 ydl.report_warning = _report_warning