1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
|
import io
import os
import unittest
import warnings
from test import support
from test.support import import_helper, os_helper, warnings_helper
_testcapi = import_helper.import_module('_testcapi')
_testlimitedcapi = import_helper.import_module('_testlimitedcapi')
_io = import_helper.import_module('_io')
NULL = None
STDOUT_FD = 1
with open(__file__, 'rb') as fp:
FIRST_LINE = next(fp).decode()
FIRST_LINE_NORM = FIRST_LINE.rstrip() + '\n'
class CAPIFileTest(unittest.TestCase):
def test_pyfile_fromfd(self):
# Test PyFile_FromFd() which is a thin wrapper to _io.open()
pyfile_fromfd = _testlimitedcapi.pyfile_fromfd
filename = __file__
with open(filename, "rb") as fp:
fd = fp.fileno()
# FileIO
fp.seek(0)
obj = pyfile_fromfd(fd, filename, "rb", 0, NULL, NULL, NULL, 0)
try:
self.assertIsInstance(obj, _io.FileIO)
self.assertEqual(obj.readline(), FIRST_LINE.encode())
finally:
obj.close()
# BufferedReader
fp.seek(0)
obj = pyfile_fromfd(fd, filename, "rb", 1024, NULL, NULL, NULL, 0)
try:
self.assertIsInstance(obj, _io.BufferedReader)
self.assertEqual(obj.readline(), FIRST_LINE.encode())
finally:
obj.close()
# TextIOWrapper
fp.seek(0)
obj = pyfile_fromfd(fd, filename, "r", 1,
"utf-8", "replace", NULL, 0)
try:
self.assertIsInstance(obj, _io.TextIOWrapper)
self.assertEqual(obj.encoding, "utf-8")
self.assertEqual(obj.errors, "replace")
self.assertEqual(obj.readline(), FIRST_LINE_NORM)
finally:
obj.close()
def test_pyfile_getline(self):
# Test PyFile_GetLine(file, n): call file.readline()
# and strip "\n" suffix if n < 0.
pyfile_getline = _testlimitedcapi.pyfile_getline
# Test Unicode
with open(__file__, "r") as fp:
fp.seek(0)
self.assertEqual(pyfile_getline(fp, -1),
FIRST_LINE_NORM.rstrip('\n'))
fp.seek(0)
self.assertEqual(pyfile_getline(fp, 0),
FIRST_LINE_NORM)
fp.seek(0)
self.assertEqual(pyfile_getline(fp, 6),
FIRST_LINE_NORM[:6])
# Test bytes
with open(__file__, "rb") as fp:
fp.seek(0)
self.assertEqual(pyfile_getline(fp, -1),
FIRST_LINE.rstrip('\n').encode())
fp.seek(0)
self.assertEqual(pyfile_getline(fp, 0),
FIRST_LINE.encode())
fp.seek(0)
self.assertEqual(pyfile_getline(fp, 6),
FIRST_LINE.encode()[:6])
def test_pyfile_writestring(self):
# Test PyFile_WriteString(str, file): call file.write(str)
writestr = _testlimitedcapi.pyfile_writestring
with io.StringIO() as fp:
self.assertEqual(writestr("a\xe9\u20ac\U0010FFFF".encode(), fp), 0)
with self.assertRaises(UnicodeDecodeError):
writestr(b"\xff", fp)
with self.assertRaises(UnicodeDecodeError):
writestr("\udc80".encode("utf-8", "surrogatepass"), fp)
text = fp.getvalue()
self.assertEqual(text, "a\xe9\u20ac\U0010FFFF")
with self.assertRaises(SystemError):
writestr(b"abc", NULL)
def test_pyfile_writeobject(self):
# Test PyFile_WriteObject(obj, file, flags):
# - Call file.write(str(obj)) if flags equals Py_PRINT_RAW.
# - Call file.write(repr(obj)) otherwise.
writeobject = _testlimitedcapi.pyfile_writeobject
Py_PRINT_RAW = 1
with io.StringIO() as fp:
# Test flags=Py_PRINT_RAW
self.assertEqual(writeobject("raw", fp, Py_PRINT_RAW), 0)
writeobject(NULL, fp, Py_PRINT_RAW)
# Test flags=0
self.assertEqual(writeobject("repr", fp, 0), 0)
writeobject(NULL, fp, 0)
text = fp.getvalue()
self.assertEqual(text, "raw<NULL>'repr'<NULL>")
# invalid file type
for invalid_file in (123, "abc", object()):
with self.subTest(file=invalid_file):
with self.assertRaises(AttributeError):
writeobject("abc", invalid_file, Py_PRINT_RAW)
with self.assertRaises(TypeError):
writeobject("abc", NULL, 0)
def test_pyobject_asfiledescriptor(self):
# Test PyObject_AsFileDescriptor(obj):
# - Return obj if obj is an integer.
# - Return obj.fileno() otherwise.
# File descriptor must be >= 0.
asfd = _testlimitedcapi.pyobject_asfiledescriptor
self.assertEqual(asfd(123), 123)
self.assertEqual(asfd(0), 0)
with open(__file__, "rb") as fp:
self.assertEqual(asfd(fp), fp.fileno())
# bool emits RuntimeWarning
msg = r"bool is used as a file descriptor"
with warnings_helper.check_warnings((msg, RuntimeWarning)):
self.assertEqual(asfd(True), 1)
class FakeFile:
def __init__(self, fd):
self.fd = fd
def fileno(self):
return self.fd
# file descriptor must be positive
with self.assertRaises(ValueError):
asfd(-1)
with self.assertRaises(ValueError):
asfd(FakeFile(-1))
# fileno() result must be an integer
with self.assertRaises(TypeError):
asfd(FakeFile("text"))
# unsupported types
for obj in ("string", ["list"], object()):
with self.subTest(obj=obj):
with self.assertRaises(TypeError):
asfd(obj)
# CRASHES asfd(NULL)
def test_pyfile_newstdprinter(self):
# Test PyFile_NewStdPrinter()
pyfile_newstdprinter = _testcapi.pyfile_newstdprinter
file = pyfile_newstdprinter(STDOUT_FD)
self.assertEqual(file.closed, False)
self.assertIsNone(file.encoding)
self.assertEqual(file.mode, "w")
self.assertEqual(file.fileno(), STDOUT_FD)
self.assertEqual(file.isatty(), os.isatty(STDOUT_FD))
# flush() is a no-op
self.assertIsNone(file.flush())
# close() is a no-op
self.assertIsNone(file.close())
self.assertEqual(file.closed, False)
support.check_disallow_instantiation(self, type(file))
def test_pyfile_newstdprinter_write(self):
# Test the write() method of PyFile_NewStdPrinter()
pyfile_newstdprinter = _testcapi.pyfile_newstdprinter
filename = os_helper.TESTFN
self.addCleanup(os_helper.unlink, filename)
try:
old_stdout = os.dup(STDOUT_FD)
except OSError as exc:
# os.dup(STDOUT_FD) is not supported on WASI
self.skipTest(f"os.dup() failed with {exc!r}")
try:
with open(filename, "wb") as fp:
# PyFile_NewStdPrinter() only accepts fileno(stdout)
# or fileno(stderr) file descriptor.
fd = fp.fileno()
os.dup2(fd, STDOUT_FD)
file = pyfile_newstdprinter(STDOUT_FD)
self.assertEqual(file.write("text"), 4)
# The surrogate character is encoded with
# the "surrogateescape" error handler
self.assertEqual(file.write("[\udc80]"), 8)
finally:
os.dup2(old_stdout, STDOUT_FD)
os.close(old_stdout)
with open(filename, "r") as fp:
self.assertEqual(fp.read(), "text[\\udc80]")
# TODO: Test Py_UniversalNewlineFgets()
# PyFile_SetOpenCodeHook() and PyFile_OpenCode() are tested by
# test_embed.test_open_code_hook()
if __name__ == "__main__":
unittest.main()
|
