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
|
'''
Tests for fileinput module.
Nick Mathewson
'''
from test.test_support import verify, verbose, TESTFN, TestFailed
import sys, os, re
from StringIO import StringIO
from fileinput import FileInput, hook_encoded
# The fileinput module has 2 interfaces: the FileInput class which does
# all the work, and a few functions (input, etc.) that use a global _state
# variable. We only test the FileInput class, since the other functions
# only provide a thin facade over FileInput.
# Write lines (a list of lines) to temp file number i, and return the
# temp file's name.
def writeTmp(i, lines, mode='w'): # opening in text mode is the default
name = TESTFN + str(i)
f = open(name, mode)
f.writelines(lines)
f.close()
return name
pat = re.compile(r'LINE (\d+) OF FILE (\d+)')
def remove_tempfiles(*names):
for name in names:
try:
os.unlink(name)
except:
pass
def runTests(t1, t2, t3, t4, bs=0, round=0):
start = 1 + round*6
if verbose:
print '%s. Simple iteration (bs=%s)' % (start+0, bs)
fi = FileInput(files=(t1, t2, t3, t4), bufsize=bs)
lines = list(fi)
fi.close()
verify(len(lines) == 31)
verify(lines[4] == 'Line 5 of file 1\n')
verify(lines[30] == 'Line 1 of file 4\n')
verify(fi.lineno() == 31)
verify(fi.filename() == t4)
if verbose:
print '%s. Status variables (bs=%s)' % (start+1, bs)
fi = FileInput(files=(t1, t2, t3, t4), bufsize=bs)
s = "x"
while s and s != 'Line 6 of file 2\n':
s = fi.readline()
verify(fi.filename() == t2)
verify(fi.lineno() == 21)
verify(fi.filelineno() == 6)
verify(not fi.isfirstline())
verify(not fi.isstdin())
if verbose:
print '%s. Nextfile (bs=%s)' % (start+2, bs)
fi.nextfile()
verify(fi.readline() == 'Line 1 of file 3\n')
verify(fi.lineno() == 22)
fi.close()
if verbose:
print '%s. Stdin (bs=%s)' % (start+3, bs)
fi = FileInput(files=(t1, t2, t3, t4, '-'), bufsize=bs)
savestdin = sys.stdin
try:
sys.stdin = StringIO("Line 1 of stdin\nLine 2 of stdin\n")
lines = list(fi)
verify(len(lines) == 33)
verify(lines[32] == 'Line 2 of stdin\n')
verify(fi.filename() == '<stdin>')
fi.nextfile()
finally:
sys.stdin = savestdin
if verbose:
print '%s. Boundary conditions (bs=%s)' % (start+4, bs)
fi = FileInput(files=(t1, t2, t3, t4), bufsize=bs)
verify(fi.lineno() == 0)
verify(fi.filename() == None)
fi.nextfile()
verify(fi.lineno() == 0)
verify(fi.filename() == None)
if verbose:
print '%s. Inplace (bs=%s)' % (start+5, bs)
savestdout = sys.stdout
try:
fi = FileInput(files=(t1, t2, t3, t4), inplace=1, bufsize=bs)
for line in fi:
line = line[:-1].upper()
print line
fi.close()
finally:
sys.stdout = savestdout
fi = FileInput(files=(t1, t2, t3, t4), bufsize=bs)
for line in fi:
verify(line[-1] == '\n')
m = pat.match(line[:-1])
verify(m != None)
verify(int(m.group(1)) == fi.filelineno())
fi.close()
def writeFiles():
global t1, t2, t3, t4
t1 = writeTmp(1, ["Line %s of file 1\n" % (i+1) for i in range(15)])
t2 = writeTmp(2, ["Line %s of file 2\n" % (i+1) for i in range(10)])
t3 = writeTmp(3, ["Line %s of file 3\n" % (i+1) for i in range(5)])
t4 = writeTmp(4, ["Line %s of file 4\n" % (i+1) for i in range(1)])
# First, run the tests with default and teeny buffer size.
for round, bs in (0, 0), (1, 30):
try:
writeFiles()
runTests(t1, t2, t3, t4, bs, round)
finally:
remove_tempfiles(t1, t2, t3, t4)
# Next, check for proper behavior with 0-byte files.
if verbose:
print "13. 0-byte files"
try:
t1 = writeTmp(1, [""])
t2 = writeTmp(2, [""])
t3 = writeTmp(3, ["The only line there is.\n"])
t4 = writeTmp(4, [""])
fi = FileInput(files=(t1, t2, t3, t4))
line = fi.readline()
verify(line == 'The only line there is.\n')
verify(fi.lineno() == 1)
verify(fi.filelineno() == 1)
verify(fi.filename() == t3)
line = fi.readline()
verify(not line)
verify(fi.lineno() == 1)
verify(fi.filelineno() == 0)
verify(fi.filename() == t4)
fi.close()
finally:
remove_tempfiles(t1, t2, t3, t4)
if verbose:
print "14. Files that don't end with newline"
try:
t1 = writeTmp(1, ["A\nB\nC"])
t2 = writeTmp(2, ["D\nE\nF"])
fi = FileInput(files=(t1, t2))
lines = list(fi)
verify(lines == ["A\n", "B\n", "C", "D\n", "E\n", "F"])
verify(fi.filelineno() == 3)
verify(fi.lineno() == 6)
finally:
remove_tempfiles(t1, t2)
if verbose:
print "15. Unicode filenames"
try:
t1 = writeTmp(1, ["A\nB"])
fi = FileInput(files=unicode(t1, sys.getfilesystemencoding()))
lines = list(fi)
verify(lines == ["A\n", "B"])
finally:
remove_tempfiles(t1)
if verbose:
print "16. fileno()"
try:
t1 = writeTmp(1, ["A\nB"])
t2 = writeTmp(2, ["C\nD"])
fi = FileInput(files=(t1, t2))
verify(fi.fileno() == -1)
line = fi.next()
verify(fi.fileno() != -1)
fi.nextfile()
verify(fi.fileno() == -1)
line = list(fi)
verify(fi.fileno() == -1)
finally:
remove_tempfiles(t1, t2)
if verbose:
print "17. Specify opening mode"
try:
# invalid mode, should raise ValueError
fi = FileInput(mode="w")
raise TestFailed("FileInput should reject invalid mode argument")
except ValueError:
pass
try:
# try opening in universal newline mode
t1 = writeTmp(1, ["A\nB\r\nC\rD"], mode="wb")
fi = FileInput(files=t1, mode="U")
lines = list(fi)
verify(lines == ["A\n", "B\n", "C\n", "D"])
finally:
remove_tempfiles(t1)
if verbose:
print "18. Test file opening hook"
try:
# cannot use openhook and inplace mode
fi = FileInput(inplace=1, openhook=lambda f,m: None)
raise TestFailed("FileInput should raise if both inplace "
"and openhook arguments are given")
except ValueError:
pass
try:
fi = FileInput(openhook=1)
raise TestFailed("FileInput should check openhook for being callable")
except ValueError:
pass
try:
t1 = writeTmp(1, ["A\nB"], mode="wb")
fi = FileInput(files=t1, openhook=hook_encoded("rot13"))
lines = list(fi)
verify(lines == ["N\n", "O"])
finally:
remove_tempfiles(t1)
|
