cpython/Lib/test/test_uu.py
Andrew Svetlov 4bb142b1b7 Issue #16714: use 'raise' exceptions, don't 'throw'.
Patch by Serhiy Storchaka.
2012-12-18 21:27:37 +02:00

240 lines
6.7 KiB
Python

"""
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 raised")
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 raised")
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_decode_filename(self):
f = None
try:
support.unlink(self.tmpin)
f = open(self.tmpin, 'wb')
f.write(encodedtextwrapped(0o644, self.tmpout))
f.close()
uu.decode(self.tmpin)
f = open(self.tmpout, 'rb')
s = f.read()
f.close()
self.assertEqual(s, plaintext)
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()