summaryrefslogtreecommitdiffstats
path: root/Lib/test/test_uu.py
blob: a54f2c1df915f6f4b79a21fd3ef4f79b9aee84a4 (plain)
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
"""
Tests for uu module.
Nick Mathewson
"""

import unittest
from test import support

import sys, os
import uu
from io import BytesIO
import io

plaintext = b"The smooth-scaled python crept over the sleeping dog\n"

encodedtext = b"""\
M5&AE('-M;V]T:\"US8V%L960@<'ET:&]N(&-R97!T(&]V97(@=&AE('-L965P
(:6YG(&1O9PH """

# Stolen from io.py
class FakeIO(io.TextIOWrapper):
    """Text I/O implementation using an in-memory buffer.

    Can be a used as a drop-in replacement for sys.stdin and sys.stdout.
    """

    # XXX This is really slow, but fully functional

    def __init__(self, initial_value="", encoding="utf-8",
                 errors="strict", newline="\n"):
        super(FakeIO, self).__init__(io.BytesIO(),
                                     encoding=encoding,
                                     errors=errors,
                                     newline=newline)
        self._encoding = encoding
        self._errors = errors
        if initial_value:
            if not isinstance(initial_value, str):
                initial_value = str(initial_value)
            self.write(initial_value)
            self.seek(0)

    def getvalue(self):
        self.flush()
        return self.buffer.getvalue().decode(self._encoding, self._errors)


def encodedtextwrapped(mode, filename):
    return (bytes("begin %03o %s\n" % (mode, filename), "ascii") +
            encodedtext + b"\n \nend\n")

class UUTest(unittest.TestCase):

    def test_encode(self):
        inp = io.BytesIO(plaintext)
        out = io.BytesIO()
        uu.encode(inp, out, "t1")
        self.assertEqual(out.getvalue(), encodedtextwrapped(0o666, "t1"))
        inp = io.BytesIO(plaintext)
        out = io.BytesIO()
        uu.encode(inp, out, "t1", 0o644)
        self.assertEqual(out.getvalue(), encodedtextwrapped(0o644, "t1"))

    def test_decode(self):
        inp = io.BytesIO(encodedtextwrapped(0o666, "t1"))
        out = io.BytesIO()
        uu.decode(inp, out)
        self.assertEqual(out.getvalue(), plaintext)
        inp = io.BytesIO(
            b"UUencoded files may contain many lines,\n" +
            b"even some that have 'begin' in them.\n" +
            encodedtextwrapped(0o666, "t1")
        )
        out = io.BytesIO()
        uu.decode(inp, out)
        self.assertEqual(out.getvalue(), plaintext)

    def test_truncatedinput(self):
        inp = io.BytesIO(b"begin 644 t1\n" + encodedtext)
        out = io.BytesIO()
        try:
            uu.decode(inp, out)
            self.fail("No exception thrown")
        except uu.Error as e:
            self.assertEqual(str(e), "Truncated input file")

    def test_missingbegin(self):
        inp = io.BytesIO(b"")
        out = io.BytesIO()
        try:
            uu.decode(inp, out)
            self.fail("No exception thrown")
        except uu.Error as e:
            self.assertEqual(str(e), "No valid begin line found in input file")

class UUStdIOTest(unittest.TestCase):

    def setUp(self):
        self.stdin = sys.stdin
        self.stdout = sys.stdout

    def tearDown(self):
        sys.stdin = self.stdin
        sys.stdout = self.stdout

    def test_encode(self):
        sys.stdin = FakeIO(plaintext.decode("ascii"))
        sys.stdout = FakeIO()
        uu.encode("-", "-", "t1", 0o666)
        self.assertEqual(sys.stdout.getvalue(),
                         encodedtextwrapped(0o666, "t1").decode("ascii"))

    def test_decode(self):
        sys.stdin = FakeIO(encodedtextwrapped(0o666, "t1").decode("ascii"))
        sys.stdout = FakeIO()
        uu.decode("-", "-")
        stdout = sys.stdout
        sys.stdout = self.stdout
        sys.stdin = self.stdin
        self.assertEqual(stdout.getvalue(), plaintext.decode("ascii"))

class UUFileTest(unittest.TestCase):

    def _kill(self, f):
        # close and remove file
        if f is None:
            return
        try:
            f.close()
        except (SystemExit, KeyboardInterrupt):
            raise
        except:
            pass
        try:
            os.unlink(f.name)
        except (SystemExit, KeyboardInterrupt):
            raise
        except:
            pass

    def setUp(self):
        self.tmpin  = support.TESTFN + "i"
        self.tmpout = support.TESTFN + "o"

    def tearDown(self):
        del self.tmpin
        del self.tmpout

    def test_encode(self):
        fin = fout = None
        try:
            support.unlink(self.tmpin)
            fin = open(self.tmpin, 'wb')
            fin.write(plaintext)
            fin.close()

            fin = open(self.tmpin, 'rb')
            fout = open(self.tmpout, 'wb')
            uu.encode(fin, fout, self.tmpin, mode=0o644)
            fin.close()
            fout.close()

            fout = open(self.tmpout, 'rb')
            s = fout.read()
            fout.close()
            self.assertEqual(s, encodedtextwrapped(0o644, self.tmpin))

            # in_file and out_file as filenames
            uu.encode(self.tmpin, self.tmpout, self.tmpin, mode=0o644)
            fout = open(self.tmpout, 'rb')
            s = fout.read()
            fout.close()
            self.assertEqual(s, encodedtextwrapped(0o644, self.tmpin))

        finally:
            self._kill(fin)
            self._kill(fout)

    def test_decode(self):
        f = None
        try:
            support.unlink(self.tmpin)
            f = open(self.tmpin, 'wb')
            f.write(encodedtextwrapped(0o644, self.tmpout))
            f.close()

            f = open(self.tmpin, 'rb')
            uu.decode(f)
            f.close()

            f = open(self.tmpout, 'rb')
            s = f.read()
            f.close()
            self.assertEqual(s, plaintext)
            # XXX is there an xp way to verify the mode?
        finally:
            self._kill(f)

    def test_decodetwice(self):
        # Verify that decode() will refuse to overwrite an existing file
        f = None
        try:
            f = io.BytesIO(encodedtextwrapped(0o644, self.tmpout))

            f = open(self.tmpin, 'rb')
            uu.decode(f)
            f.close()

            f = open(self.tmpin, 'rb')
            self.assertRaises(uu.Error, uu.decode, f)
            f.close()
        finally:
            self._kill(f)

def test_main():
    support.run_unittest(UUTest,
                              UUStdIOTest,
                              UUFileTest,
                              )

if __name__=="__main__":
    test_main()