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253 lines
8.1 KiB
253 lines
8.1 KiB
3 years ago
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"""
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Tests for uu module.
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Nick Mathewson
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"""
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import unittest
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from test.support import os_helper
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import os
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import stat
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import sys
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import uu
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import io
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plaintext = b"The symbols on top of your keyboard are !@#$%^&*()_+|~\n"
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encodedtext = b"""\
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M5&AE('-Y;6)O;',@;VX@=&]P(&]F('EO=7(@:V5Y8F]A<F0@87)E("% (R0E
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*7B8J*"E?*WQ^"@ """
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# Stolen from io.py
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class FakeIO(io.TextIOWrapper):
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"""Text I/O implementation using an in-memory buffer.
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Can be a used as a drop-in replacement for sys.stdin and sys.stdout.
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"""
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# XXX This is really slow, but fully functional
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def __init__(self, initial_value="", encoding="utf-8",
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errors="strict", newline="\n"):
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super(FakeIO, self).__init__(io.BytesIO(),
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encoding=encoding,
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errors=errors,
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newline=newline)
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self._encoding = encoding
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self._errors = errors
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if initial_value:
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if not isinstance(initial_value, str):
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initial_value = str(initial_value)
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self.write(initial_value)
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self.seek(0)
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def getvalue(self):
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self.flush()
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return self.buffer.getvalue().decode(self._encoding, self._errors)
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def encodedtextwrapped(mode, filename, backtick=False):
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if backtick:
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res = (bytes("begin %03o %s\n" % (mode, filename), "ascii") +
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encodedtext.replace(b' ', b'`') + b"\n`\nend\n")
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else:
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res = (bytes("begin %03o %s\n" % (mode, filename), "ascii") +
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encodedtext + b"\n \nend\n")
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return res
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class UUTest(unittest.TestCase):
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def test_encode(self):
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inp = io.BytesIO(plaintext)
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out = io.BytesIO()
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uu.encode(inp, out, "t1")
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self.assertEqual(out.getvalue(), encodedtextwrapped(0o666, "t1"))
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inp = io.BytesIO(plaintext)
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out = io.BytesIO()
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uu.encode(inp, out, "t1", 0o644)
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self.assertEqual(out.getvalue(), encodedtextwrapped(0o644, "t1"))
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inp = io.BytesIO(plaintext)
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out = io.BytesIO()
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uu.encode(inp, out, "t1", backtick=True)
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self.assertEqual(out.getvalue(), encodedtextwrapped(0o666, "t1", True))
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with self.assertRaises(TypeError):
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uu.encode(inp, out, "t1", 0o644, True)
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def test_decode(self):
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for backtick in True, False:
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inp = io.BytesIO(encodedtextwrapped(0o666, "t1", backtick=backtick))
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out = io.BytesIO()
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uu.decode(inp, out)
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self.assertEqual(out.getvalue(), plaintext)
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inp = io.BytesIO(
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b"UUencoded files may contain many lines,\n" +
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b"even some that have 'begin' in them.\n" +
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encodedtextwrapped(0o666, "t1", backtick=backtick)
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)
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out = io.BytesIO()
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uu.decode(inp, out)
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self.assertEqual(out.getvalue(), plaintext)
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def test_truncatedinput(self):
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inp = io.BytesIO(b"begin 644 t1\n" + encodedtext)
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out = io.BytesIO()
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try:
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uu.decode(inp, out)
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self.fail("No exception raised")
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except uu.Error as e:
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self.assertEqual(str(e), "Truncated input file")
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def test_missingbegin(self):
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inp = io.BytesIO(b"")
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out = io.BytesIO()
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try:
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uu.decode(inp, out)
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self.fail("No exception raised")
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except uu.Error as e:
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self.assertEqual(str(e), "No valid begin line found in input file")
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def test_garbage_padding(self):
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# Issue #22406
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encodedtext1 = (
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b"begin 644 file\n"
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# length 1; bits 001100 111111 111111 111111
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b"\x21\x2C\x5F\x5F\x5F\n"
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b"\x20\n"
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b"end\n"
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)
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encodedtext2 = (
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b"begin 644 file\n"
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# length 1; bits 001100 111111 111111 111111
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b"\x21\x2C\x5F\x5F\x5F\n"
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b"\x60\n"
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b"end\n"
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)
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plaintext = b"\x33" # 00110011
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for encodedtext in encodedtext1, encodedtext2:
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with self.subTest("uu.decode()"):
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inp = io.BytesIO(encodedtext)
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out = io.BytesIO()
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uu.decode(inp, out, quiet=True)
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self.assertEqual(out.getvalue(), plaintext)
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with self.subTest("uu_codec"):
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import codecs
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decoded = codecs.decode(encodedtext, "uu_codec")
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self.assertEqual(decoded, plaintext)
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def test_newlines_escaped(self):
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# Test newlines are escaped with uu.encode
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inp = io.BytesIO(plaintext)
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out = io.BytesIO()
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filename = "test.txt\n\roverflow.txt"
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safefilename = b"test.txt\\n\\roverflow.txt"
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uu.encode(inp, out, filename)
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self.assertIn(safefilename, out.getvalue())
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class UUStdIOTest(unittest.TestCase):
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def setUp(self):
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self.stdin = sys.stdin
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self.stdout = sys.stdout
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def tearDown(self):
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sys.stdin = self.stdin
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sys.stdout = self.stdout
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def test_encode(self):
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sys.stdin = FakeIO(plaintext.decode("ascii"))
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sys.stdout = FakeIO()
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uu.encode("-", "-", "t1", 0o666)
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self.assertEqual(sys.stdout.getvalue(),
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encodedtextwrapped(0o666, "t1").decode("ascii"))
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def test_decode(self):
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sys.stdin = FakeIO(encodedtextwrapped(0o666, "t1").decode("ascii"))
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sys.stdout = FakeIO()
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uu.decode("-", "-")
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stdout = sys.stdout
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sys.stdout = self.stdout
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sys.stdin = self.stdin
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self.assertEqual(stdout.getvalue(), plaintext.decode("ascii"))
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class UUFileTest(unittest.TestCase):
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def setUp(self):
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# uu.encode() supports only ASCII file names
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self.tmpin = os_helper.TESTFN_ASCII + "i"
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self.tmpout = os_helper.TESTFN_ASCII + "o"
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self.addCleanup(os_helper.unlink, self.tmpin)
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self.addCleanup(os_helper.unlink, self.tmpout)
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def test_encode(self):
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with open(self.tmpin, 'wb') as fin:
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fin.write(plaintext)
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with open(self.tmpin, 'rb') as fin:
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with open(self.tmpout, 'wb') as fout:
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uu.encode(fin, fout, self.tmpin, mode=0o644)
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with open(self.tmpout, 'rb') as fout:
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s = fout.read()
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self.assertEqual(s, encodedtextwrapped(0o644, self.tmpin))
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# in_file and out_file as filenames
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uu.encode(self.tmpin, self.tmpout, self.tmpin, mode=0o644)
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with open(self.tmpout, 'rb') as fout:
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s = fout.read()
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self.assertEqual(s, encodedtextwrapped(0o644, self.tmpin))
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def test_decode(self):
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with open(self.tmpin, 'wb') as f:
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f.write(encodedtextwrapped(0o644, self.tmpout))
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with open(self.tmpin, 'rb') as f:
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uu.decode(f)
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with open(self.tmpout, 'rb') as f:
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s = f.read()
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self.assertEqual(s, plaintext)
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# XXX is there an xp way to verify the mode?
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def test_decode_filename(self):
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with open(self.tmpin, 'wb') as f:
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f.write(encodedtextwrapped(0o644, self.tmpout))
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uu.decode(self.tmpin)
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with open(self.tmpout, 'rb') as f:
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s = f.read()
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self.assertEqual(s, plaintext)
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def test_decodetwice(self):
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# Verify that decode() will refuse to overwrite an existing file
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with open(self.tmpin, 'wb') as f:
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f.write(encodedtextwrapped(0o644, self.tmpout))
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with open(self.tmpin, 'rb') as f:
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uu.decode(f)
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with open(self.tmpin, 'rb') as f:
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self.assertRaises(uu.Error, uu.decode, f)
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def test_decode_mode(self):
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# Verify that decode() will set the given mode for the out_file
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expected_mode = 0o444
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with open(self.tmpin, 'wb') as f:
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f.write(encodedtextwrapped(expected_mode, self.tmpout))
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# make file writable again, so it can be removed (Windows only)
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self.addCleanup(os.chmod, self.tmpout, expected_mode | stat.S_IWRITE)
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with open(self.tmpin, 'rb') as f:
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uu.decode(f)
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self.assertEqual(
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stat.S_IMODE(os.stat(self.tmpout).st_mode),
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expected_mode
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)
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if __name__=="__main__":
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unittest.main()
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