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✏️ test_bytes.py
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"""Unit tests for the bytes and bytearray types. XXX This is a mess. Common tests should be unified with string_tests.py (and the latter should be modernized). """ import array import os import re import sys import copy import functools import pickle import tempfile import unittest import test.test_support import test.string_tests if sys.flags.bytes_warning: def check_bytes_warnings(func): @functools.wraps(func) def wrapper(*args, **kw): with test.test_support.check_warnings(('', BytesWarning)): return func(*args, **kw) return wrapper else: # no-op def check_bytes_warnings(func): return func class Indexable: def __init__(self, value=0): self.value = value def __index__(self): return self.value class BaseBytesTest(unittest.TestCase): def test_basics(self): b = self.type2test() self.assertEqual(type(b), self.type2test) self.assertEqual(b.__class__, self.type2test) def test_empty_sequence(self): b = self.type2test() self.assertEqual(len(b), 0) self.assertRaises(IndexError, lambda: b[0]) self.assertRaises(IndexError, lambda: b[1]) self.assertRaises(IndexError, lambda: b[sys.maxint]) self.assertRaises(IndexError, lambda: b[sys.maxint+1]) self.assertRaises(IndexError, lambda: b[10**100]) self.assertRaises(IndexError, lambda: b[-1]) self.assertRaises(IndexError, lambda: b[-2]) self.assertRaises(IndexError, lambda: b[-sys.maxint]) self.assertRaises(IndexError, lambda: b[-sys.maxint-1]) self.assertRaises(IndexError, lambda: b[-sys.maxint-2]) self.assertRaises(IndexError, lambda: b[-10**100]) def test_from_iterable(self): b = self.type2test(range(256)) self.assertEqual(len(b), 256) self.assertEqual(list(b), list(range(256))) # Non-sequence iterable. b = self.type2test({42}) self.assertEqual(b, b"*") b = self.type2test({43, 45}) self.assertIn(tuple(b), {(43, 45), (45, 43)}) # Iterator that has a __length_hint__. b = self.type2test(iter(range(256))) self.assertEqual(len(b), 256) self.assertEqual(list(b), list(range(256))) # Iterator that doesn't have a __length_hint__. b = self.type2test(i for i in range(256) if i % 2) self.assertEqual(len(b), 128) self.assertEqual(list(b), list(range(256))[1::2]) # Sequence without __iter__. class S: def __getitem__(self, i): return (1, 2, 3)[i] b = self.type2test(S()) self.assertEqual(b, b"\x01\x02\x03") def test_from_tuple(self): # There is a special case for tuples. b = self.type2test(tuple(range(256))) self.assertEqual(len(b), 256) self.assertEqual(list(b), list(range(256))) b = self.type2test((1, 2, 3)) self.assertEqual(b, b"\x01\x02\x03") def test_from_list(self): # There is a special case for lists. b = self.type2test(list(range(256))) self.assertEqual(len(b), 256) self.assertEqual(list(b), list(range(256))) b = self.type2test([1, 2, 3]) self.assertEqual(b, b"\x01\x02\x03") def test_from_index(self): b = self.type2test([Indexable(), Indexable(1), Indexable(254), Indexable(255)]) self.assertEqual(list(b), [0, 1, 254, 255]) self.assertRaises(ValueError, self.type2test, [Indexable(-1)]) self.assertRaises(ValueError, self.type2test, [Indexable(256)]) def test_from_buffer(self): a = self.type2test(array.array('B', [1, 2, 3])) self.assertEqual(a, b"\x01\x02\x03") a = self.type2test(b"\x01\x02\x03") self.assertEqual(a, b"\x01\x02\x03") # Issues #29159 and #34974. # Fallback when __index__ raises a TypeError class B(bytes): def __index__(self): raise TypeError self.assertEqual(self.type2test(B(b"foobar")), b"foobar") def test_from_ssize(self): self.assertEqual(self.type2test(0), b'') self.assertEqual(self.type2test(1), b'\x00') self.assertEqual(self.type2test(5), b'\x00\x00\x00\x00\x00') self.assertRaises(ValueError, self.type2test, -1) self.assertEqual(self.type2test('0', 'ascii'), b'0') self.assertEqual(self.type2test(b'0'), b'0') self.assertRaises(OverflowError, self.type2test, sys.maxsize + 1) def test_constructor_type_errors(self): self.assertRaises(TypeError, self.type2test, 0.0) class C: pass # allowed in 2.x #self.assertRaises(TypeError, self.type2test, ["0"]) self.assertRaises(TypeError, self.type2test, [0.0]) self.assertRaises(TypeError, self.type2test, [None]) self.assertRaises(TypeError, self.type2test, [C()]) def test_constructor_value_errors(self): self.assertRaises(ValueError, self.type2test, [-1]) self.assertRaises(ValueError, self.type2test, [-sys.maxint]) self.assertRaises(ValueError, self.type2test, [-sys.maxint-1]) self.assertRaises(ValueError, self.type2test, [-sys.maxint-2]) self.assertRaises(ValueError, self.type2test, [-10**100]) self.assertRaises(ValueError, self.type2test, [256]) self.assertRaises(ValueError, self.type2test, [257]) self.assertRaises(ValueError, self.type2test, [sys.maxint]) self.assertRaises(ValueError, self.type2test, [sys.maxint+1]) self.assertRaises(ValueError, self.type2test, [10**100]) def test_constructor_exceptions(self): # Issue #34974: bytes and bytearray constructors replace unexpected # exceptions. class BadInt: def __index__(self): 1//0 self.assertRaises(ZeroDivisionError, self.type2test, BadInt()) self.assertRaises(ZeroDivisionError, self.type2test, [BadInt()]) class BadIterable: def __iter__(self): 1//0 self.assertRaises(ZeroDivisionError, self.type2test, BadIterable()) def test_compare(self): b1 = self.type2test([1, 2, 3]) b2 = self.type2test([1, 2, 3]) b3 = self.type2test([1, 3]) self.assertEqual(b1, b2) self.assertTrue(b2 != b3) self.assertTrue(b1 <= b2) self.assertTrue(b1 <= b3) self.assertTrue(b1 < b3) self.assertTrue(b1 >= b2) self.assertTrue(b3 >= b2) self.assertTrue(b3 > b2) self.assertFalse(b1 != b2) self.assertFalse(b2 == b3) self.assertFalse(b1 > b2) self.assertFalse(b1 > b3) self.assertFalse(b1 >= b3) self.assertFalse(b1 < b2) self.assertFalse(b3 < b2) self.assertFalse(b3 <= b2) @check_bytes_warnings def test_compare_to_str(self): # Byte comparisons with unicode should always fail! # Test this for all expected byte orders and Unicode character sizes self.assertEqual(self.type2test(b"\0a\0b\0c") == u"abc", False) self.assertEqual(self.type2test(b"\0\0\0a\0\0\0b\0\0\0c") == u"abc", False) self.assertEqual(self.type2test(b"a\0b\0c\0") == u"abc", False) self.assertEqual(self.type2test(b"a\0\0\0b\0\0\0c\0\0\0") == u"abc", False) self.assertEqual(self.type2test() == unicode(), False) self.assertEqual(self.type2test() != unicode(), True) def test_reversed(self): input = list(map(ord, "Hello")) b = self.type2test(input) output = list(reversed(b)) input.reverse() self.assertEqual(output, input) def test_getslice(self): def by(s): return self.type2test(map(ord, s)) b = by("Hello, world") self.assertEqual(b[:5], by("Hello")) self.assertEqual(b[1:5], by("ello")) self.assertEqual(b[5:7], by(", ")) self.assertEqual(b[7:], by("world")) self.assertEqual(b[7:12], by("world")) self.assertEqual(b[7:100], by("world")) self.assertEqual(b[:-7], by("Hello")) self.assertEqual(b[-11:-7], by("ello")) self.assertEqual(b[-7:-5], by(", ")) self.assertEqual(b[-5:], by("world")) self.assertEqual(b[-5:12], by("world")) self.assertEqual(b[-5:100], by("world")) self.assertEqual(b[-100:5], by("Hello")) def test_extended_getslice(self): # Test extended slicing by comparing with list slicing. L = list(range(255)) b = self.type2test(L) indices = (0, None, 1, 3, 19, 100, -1, -2, -31, -100) for start in indices: for stop in indices: # Skip step 0 (invalid) for step in indices[1:]: self.assertEqual(b[start:stop:step], self.type2test(L[start:stop:step])) def test_encoding(self): sample = u"Hello world\n\u1234\u5678\u9abc\udef0" for enc in ("utf8", "utf16"): b = self.type2test(sample, enc) self.assertEqual(b, self.type2test(sample.encode(enc))) self.assertRaises(UnicodeEncodeError, self.type2test, sample, "latin1") b = self.type2test(sample, "latin1", "ignore") self.assertEqual(b, self.type2test(sample[:-4], "utf-8")) def test_decode(self): sample = u"Hello world\n\u1234\u5678\u9abc\def0\def0" for enc in ("utf8", "utf16"): b = self.type2test(sample, enc) self.assertEqual(b.decode(enc), sample) sample = u"Hello world\n\x80\x81\xfe\xff" b = self.type2test(sample, "latin1") self.assertRaises(UnicodeDecodeError, b.decode, "utf8") self.assertEqual(b.decode("utf8", "ignore"), "Hello world\n") self.assertEqual(b.decode(errors="ignore", encoding="utf8"), "Hello world\n") def test_from_int(self): b = self.type2test(0) self.assertEqual(b, self.type2test()) b = self.type2test(10) self.assertEqual(b, self.type2test([0]*10)) b = self.type2test(10000) self.assertEqual(b, self.type2test([0]*10000)) def test_concat(self): b1 = self.type2test(b"abc") b2 = self.type2test(b"def") self.assertEqual(b1 + b2, b"abcdef") self.assertEqual(b1 + bytes(b"def"), b"abcdef") self.assertEqual(bytes(b"def") + b1, b"defabc") self.assertRaises(TypeError, lambda: b1 + u"def") self.assertRaises(TypeError, lambda: u"abc" + b2) def test_repeat(self): for b in b"abc", self.type2test(b"abc"): self.assertEqual(b * 3, b"abcabcabc") self.assertEqual(b * 0, b"") self.assertEqual(b * -1, b"") self.assertRaises(TypeError, lambda: b * 3.14) self.assertRaises(TypeError, lambda: 3.14 * b) # XXX Shouldn't bytes and bytearray agree on what to raise? self.assertRaises((OverflowError, MemoryError), lambda: b * sys.maxsize) def test_repeat_1char(self): self.assertEqual(self.type2test(b'x')*100, self.type2test([ord('x')]*100)) def test_contains(self): b = self.type2test(b"abc") self.assertIn(ord('a'), b) self.assertIn(int(ord('a')), b) self.assertNotIn(200, b) self.assertRaises(ValueError, lambda: 300 in b) self.assertRaises(ValueError, lambda: -1 in b) self.assertRaises(TypeError, lambda: None in b) self.assertRaises(TypeError, lambda: float(ord('a')) in b) self.assertRaises(TypeError, lambda: u"a" in b) for f in bytes, bytearray: self.assertIn(f(b""), b) self.assertIn(f(b"a"), b) self.assertIn(f(b"b"), b) self.assertIn(f(b"c"), b) self.assertIn(f(b"ab"), b) self.assertIn(f(b"bc"), b) self.assertIn(f(b"abc"), b) self.assertNotIn(f(b"ac"), b) self.assertNotIn(f(b"d"), b) self.assertNotIn(f(b"dab"), b) self.assertNotIn(f(b"abd"), b) def test_fromhex(self): self.assertRaises(TypeError, self.type2test.fromhex) self.assertRaises(TypeError, self.type2test.fromhex, 1) self.assertEqual(self.type2test.fromhex(u''), self.type2test()) b = bytearray([0x1a, 0x2b, 0x30]) self.assertEqual(self.type2test.fromhex(u'1a2B30'), b) self.assertEqual(self.type2test.fromhex(u' 1A 2B 30 '), b) self.assertEqual(self.type2test.fromhex(u'0000'), b'\0\0') self.assertRaises(ValueError, self.type2test.fromhex, u'a') self.assertRaises(ValueError, self.type2test.fromhex, u'rt') self.assertRaises(ValueError, self.type2test.fromhex, u'1a b cd') self.assertRaises(ValueError, self.type2test.fromhex, u'\x00') self.assertRaises(ValueError, self.type2test.fromhex, u'12 \x00 34') def test_join(self): self.assertEqual(self.type2test(b"").join([]), b"") self.assertEqual(self.type2test(b"").join([b""]), b"") for lst in [[b"abc"], [b"a", b"bc"], [b"ab", b"c"], [b"a", b"b", b"c"]]: lst = list(map(self.type2test, lst)) self.assertEqual(self.type2test(b"").join(lst), b"abc") self.assertEqual(self.type2test(b"").join(tuple(lst)), b"abc") self.assertEqual(self.type2test(b"").join(iter(lst)), b"abc") self.assertEqual(self.type2test(b".").join([b"ab", b"cd"]), b"ab.cd") # XXX more... def test_count(self): b = self.type2test(b'mississippi') self.assertEqual(b.count(b'i'), 4) self.assertEqual(b.count(b'ss'), 2) self.assertEqual(b.count(b'w'), 0) def test_startswith(self): b = self.type2test(b'hello') self.assertFalse(self.type2test().startswith(b"anything")) self.assertTrue(b.startswith(b"hello")) self.assertTrue(b.startswith(b"hel")) self.assertTrue(b.startswith(b"h")) self.assertFalse(b.startswith(b"hellow")) self.assertFalse(b.startswith(b"ha")) def test_endswith(self): b = self.type2test(b'hello') self.assertFalse(bytearray().endswith(b"anything")) self.assertTrue(b.endswith(b"hello")) self.assertTrue(b.endswith(b"llo")) self.assertTrue(b.endswith(b"o")) self.assertFalse(b.endswith(b"whello")) self.assertFalse(b.endswith(b"no")) def test_find(self): b = self.type2test(b'mississippi') self.assertEqual(b.find(b'ss'), 2) self.assertEqual(b.find(b'ss', 3), 5) self.assertEqual(b.find(b'ss', 1, 7), 2) self.assertEqual(b.find(b'ss', 1, 3), -1) self.assertEqual(b.find(b'w'), -1) self.assertEqual(b.find(b'mississippian'), -1) def test_rfind(self): b = self.type2test(b'mississippi') self.assertEqual(b.rfind(b'ss'), 5) self.assertEqual(b.rfind(b'ss', 3), 5) self.assertEqual(b.rfind(b'ss', 0, 6), 2) self.assertEqual(b.rfind(b'w'), -1) self.assertEqual(b.rfind(b'mississippian'), -1) def test_index(self): b = self.type2test(b'world') self.assertEqual(b.index(b'w'), 0) self.assertEqual(b.index(b'orl'), 1) self.assertRaises(ValueError, b.index, b'worm') self.assertRaises(ValueError, b.index, b'ldo') def test_rindex(self): # XXX could be more rigorous b = self.type2test(b'world') self.assertEqual(b.rindex(b'w'), 0) self.assertEqual(b.rindex(b'orl'), 1) self.assertRaises(ValueError, b.rindex, b'worm') self.assertRaises(ValueError, b.rindex, b'ldo') def test_replace(self): b = self.type2test(b'mississippi') self.assertEqual(b.replace(b'i', b'a'), b'massassappa') self.assertEqual(b.replace(b'ss', b'x'), b'mixixippi') def test_replace_int_error(self): self.assertRaises(TypeError, self.type2test(b'a b').replace, 32, b'') def test_split_string_error(self): self.assertRaises(TypeError, self.type2test(b'a b').split, u' ') self.assertRaises(TypeError, self.type2test(b'a b').rsplit, u' ') def test_split_int_error(self): self.assertRaises(TypeError, self.type2test(b'a b').split, 32) self.assertRaises(TypeError, self.type2test(b'a b').rsplit, 32) def test_split_unicodewhitespace(self): for b in (b'a\x1Cb', b'a\x1Db', b'a\x1Eb', b'a\x1Fb'): b = self.type2test(b) self.assertEqual(b.split(), [b]) b = self.type2test(b"\x09\x0A\x0B\x0C\x0D\x1C\x1D\x1E\x1F") self.assertEqual(b.split(), [b'\x1c\x1d\x1e\x1f']) def test_rsplit_unicodewhitespace(self): b = self.type2test(b"\x09\x0A\x0B\x0C\x0D\x1C\x1D\x1E\x1F") self.assertEqual(b.rsplit(), [b'\x1c\x1d\x1e\x1f']) def test_partition(self): b = self.type2test(b'mississippi') self.assertEqual(b.partition(b'ss'), (b'mi', b'ss', b'issippi')) self.assertEqual(b.partition(b'w'), (b'mississippi', b'', b'')) def test_rpartition(self): b = self.type2test(b'mississippi') self.assertEqual(b.rpartition(b'ss'), (b'missi', b'ss', b'ippi')) self.assertEqual(b.rpartition(b'i'), (b'mississipp', b'i', b'')) self.assertEqual(b.rpartition(b'w'), (b'', b'', b'mississippi')) def test_partition_string_error(self): self.assertRaises(TypeError, self.type2test(b'a b').partition, u' ') self.assertRaises(TypeError, self.type2test(b'a b').rpartition, u' ') def test_partition_int_error(self): self.assertRaises(TypeError, self.type2test(b'a b').partition, 32) self.assertRaises(TypeError, self.type2test(b'a b').rpartition, 32) def test_pickling(self): for proto in range(pickle.HIGHEST_PROTOCOL + 1): for b in b"", b"a", b"abc", b"\xffab\x80", b"\0\0\377\0\0": b = self.type2test(b) ps = pickle.dumps(b, proto) q = pickle.loads(ps) self.assertEqual(b, q) def test_strip_bytearray(self): self.assertEqual(self.type2test(b'abc').strip(memoryview(b'ac')), b'b') self.assertEqual(self.type2test(b'abc').lstrip(memoryview(b'ac')), b'bc') self.assertEqual(self.type2test(b'abc').rstrip(memoryview(b'ac')), b'ab') def test_strip_string_error(self): self.assertRaises(TypeError, self.type2test(b'abc').strip, u'ac') self.assertRaises(TypeError, self.type2test(b'abc').lstrip, u'ac') self.assertRaises(TypeError, self.type2test(b'abc').rstrip, u'ac') def test_strip_int_error(self): self.assertRaises(TypeError, self.type2test(b' abc ').strip, 32) self.assertRaises(TypeError, self.type2test(b' abc ').lstrip, 32) self.assertRaises(TypeError, self.type2test(b' abc ').rstrip, 32) def test_xjust_int_error(self): self.assertRaises(TypeError, self.type2test(b'abc').center, 7, 32) self.assertRaises(TypeError, self.type2test(b'abc').ljust, 7, 32) self.assertRaises(TypeError, self.type2test(b'abc').rjust, 7, 32) def test_ord(self): b = self.type2test(b'\0A\x7f\x80\xff') self.assertEqual([ord(b[i:i+1]) for i in range(len(b))], [0, 65, 127, 128, 255]) def test_none_arguments(self): # issue 11828 b = self.type2test(b'hello') l = self.type2test(b'l') h = self.type2test(b'h') x = self.type2test(b'x') o = self.type2test(b'o') self.assertEqual(2, b.find(l, None)) self.assertEqual(3, b.find(l, -2, None)) self.assertEqual(2, b.find(l, None, -2)) self.assertEqual(0, b.find(h, None, None)) self.assertEqual(3, b.rfind(l, None)) self.assertEqual(3, b.rfind(l, -2, None)) self.assertEqual(2, b.rfind(l, None, -2)) self.assertEqual(0, b.rfind(h, None, None)) self.assertEqual(2, b.index(l, None)) self.assertEqual(3, b.index(l, -2, None)) self.assertEqual(2, b.index(l, None, -2)) self.assertEqual(0, b.index(h, None, None)) self.assertEqual(3, b.rindex(l, None)) self.assertEqual(3, b.rindex(l, -2, None)) self.assertEqual(2, b.rindex(l, None, -2)) self.assertEqual(0, b.rindex(h, None, None)) self.assertEqual(2, b.count(l, None)) self.assertEqual(1, b.count(l, -2, None)) self.assertEqual(1, b.count(l, None, -2)) self.assertEqual(0, b.count(x, None, None)) self.assertEqual(True, b.endswith(o, None)) self.assertEqual(True, b.endswith(o, -2, None)) self.assertEqual(True, b.endswith(l, None, -2)) self.assertEqual(False, b.endswith(x, None, None)) self.assertEqual(True, b.startswith(h, None)) self.assertEqual(True, b.startswith(l, -2, None)) self.assertEqual(True, b.startswith(h, None, -2)) self.assertEqual(False, b.startswith(x, None, None)) def test_find_etc_raise_correct_error_messages(self): # issue 11828 b = self.type2test(b'hello') x = self.type2test(b'x') self.assertRaisesRegexp(TypeError, r'\bfind\b', b.find, x, None, None, None) self.assertRaisesRegexp(TypeError, r'\brfind\b', b.rfind, x, None, None, None) self.assertRaisesRegexp(TypeError, r'\bindex\b', b.index, x, None, None, None) self.assertRaisesRegexp(TypeError, r'\brindex\b', b.rindex, x, None, None, None) self.assertRaisesRegexp(TypeError, r'\bcount\b', b.count, x, None, None, None) self.assertRaisesRegexp(TypeError, r'\bstartswith\b', b.startswith, x, None, None, None) self.assertRaisesRegexp(TypeError, r'\bendswith\b', b.endswith, x, None, None, None) def test_free_after_iterating(self): test.test_support.check_free_after_iterating(self, iter, self.type2test) test.test_support.check_free_after_iterating(self, reversed, self.type2test) class ByteArrayTest(BaseBytesTest): type2test = bytearray def test_nohash(self): self.assertRaises(TypeError, hash, bytearray()) def test_bytearray_api(self): short_sample = b"Hello world\n" sample = short_sample + b"\0"*(20 - len(short_sample)) tfn = tempfile.mktemp() try: # Prepare with open(tfn, "wb") as f: f.write(short_sample) # Test readinto with open(tfn, "rb") as f: b = bytearray(20) n = f.readinto(b) self.assertEqual(n, len(short_sample)) # Python 2.x b_sample = (ord(s) for s in sample) self.assertEqual(list(b), list(b_sample)) # Test writing in binary mode with open(tfn, "wb") as f: f.write(b) with open(tfn, "rb") as f: self.assertEqual(f.read(), sample) # Text mode is ambiguous; don't test finally: try: os.remove(tfn) except os.error: pass def test_reverse(self): b = bytearray(b'hello') self.assertEqual(b.reverse(), None) self.assertEqual(b, b'olleh') b = bytearray(b'hello1') # test even number of items b.reverse() self.assertEqual(b, b'1olleh') b = bytearray() b.reverse() self.assertFalse(b) def test_regexps(self): def by(s): return bytearray(map(ord, s)) b = by("Hello, world") self.assertEqual(re.findall(r"\w+", b), [by("Hello"), by("world")]) def test_setitem(self): b = bytearray([1, 2, 3]) b[1] = 100 self.assertEqual(b, bytearray([1, 100, 3])) b[-1] = 200 self.assertEqual(b, bytearray([1, 100, 200])) b[0] = Indexable(10) self.assertEqual(b, bytearray([10, 100, 200])) try: b[3] = 0 self.fail("Didn't raise IndexError") except IndexError: pass try: b[-10] = 0 self.fail("Didn't raise IndexError") except IndexError: pass try: b[0] = 256 self.fail("Didn't raise ValueError") except ValueError: pass try: b[0] = Indexable(-1) self.fail("Didn't raise ValueError") except ValueError: pass try: b[0] = None self.fail("Didn't raise TypeError") except TypeError: pass def test_delitem(self): b = bytearray(range(10)) del b[0] self.assertEqual(b, bytearray(range(1, 10))) del b[-1] self.assertEqual(b, bytearray(range(1, 9))) del b[4] self.assertEqual(b, bytearray([1, 2, 3, 4, 6, 7, 8])) def test_setslice(self): b = bytearray(range(10)) self.assertEqual(list(b), list(range(10))) b[0:5] = bytearray([1, 1, 1, 1, 1]) self.assertEqual(b, bytearray([1, 1, 1, 1, 1, 5, 6, 7, 8, 9])) del b[0:-5] self.assertEqual(b, bytearray([5, 6, 7, 8, 9])) b[0:0] = bytearray([0, 1, 2, 3, 4]) self.assertEqual(b, bytearray(range(10))) b[-7:-3] = bytearray([100, 101]) self.assertEqual(b, bytearray([0, 1, 2, 100, 101, 7, 8, 9])) b[3:5] = [3, 4, 5, 6] self.assertEqual(b, bytearray(range(10))) b[3:0] = [42, 42, 42] self.assertEqual(b, bytearray([0, 1, 2, 42, 42, 42, 3, 4, 5, 6, 7, 8, 9])) b[3:] = b'foo' self.assertEqual(b, bytearray([0, 1, 2, 102, 111, 111])) b[:3] = memoryview(b'foo') self.assertEqual(b, bytearray([102, 111, 111, 102, 111, 111])) b[3:4] = [] self.assertEqual(b, bytearray([102, 111, 111, 111, 111])) b[1:] = list(b'uuuu') # this works only on Python2 self.assertEqual(b, bytearray([102, 117, 117, 117, 117])) for elem in [5, -5, 0, long(10e20), u'str', 2.3, [u'a', u'b'], [[]]]: with self.assertRaises(TypeError): b[3:4] = elem for elem in [[254, 255, 256], [-256, 9000]]: with self.assertRaises(ValueError): b[3:4] = elem def test_extended_set_del_slice(self): indices = (0, None, 1, 3, 19, 300, 1<<333, -1, -2, -31, -300) for start in indices: for stop in indices: # Skip invalid step 0 for step in indices[1:]: L = list(range(255)) b = bytearray(L) # Make sure we have a slice of exactly the right length, # but with different data. data = L[start:stop:step] data.reverse() L[start:stop:step] = data b[start:stop:step] = data self.assertEqual(b, bytearray(L)) del L[start:stop:step] del b[start:stop:step] self.assertEqual(b, bytearray(L)) def test_setslice_trap(self): # This test verifies that we correctly handle assigning self # to a slice of self (the old Lambert Meertens trap). b = bytearray(range(256)) b[8:] = b self.assertEqual(b, bytearray(list(range(8)) + list(range(256)))) def test_iconcat(self): b = bytearray(b"abc") b1 = b b += b"def" self.assertEqual(b, b"abcdef") self.assertEqual(b, b1) self.assertTrue(b is b1) b += b"xyz" self.assertEqual(b, b"abcdefxyz") try: b += u"" except TypeError: pass else: self.fail("bytes += unicode didn't raise TypeError") def test_irepeat(self): b = bytearray(b"abc") b1 = b b *= 3 self.assertEqual(b, b"abcabcabc") self.assertEqual(b, b1) self.assertTrue(b is b1) def test_irepeat_1char(self): b = bytearray(b"x") b1 = b b *= 100 self.assertEqual(b, b"x"*100) self.assertEqual(b, b1) self.assertTrue(b is b1) def test_alloc(self): b = bytearray() alloc = b.__alloc__() self.assertTrue(alloc >= 0) seq = [alloc] for i in range(100): b += b"x" alloc = b.__alloc__() self.assertGreater(alloc, len(b)) # including trailing null byte if alloc not in seq: seq.append(alloc) def test_init_alloc(self): b = bytearray() def g(): for i in range(1, 100): yield i a = list(b) self.assertEqual(a, list(range(1, len(a)+1))) self.assertEqual(len(b), len(a)) self.assertLessEqual(len(b), i) alloc = b.__alloc__() self.assertGreater(alloc, len(b)) # including trailing null byte b.__init__(g()) self.assertEqual(list(b), list(range(1, 100))) self.assertEqual(len(b), 99) alloc = b.__alloc__() self.assertGreater(alloc, len(b)) def test_extend(self): orig = b'hello' a = bytearray(orig) a.extend(a) self.assertEqual(a, orig + orig) self.assertEqual(a[5:], orig) a = bytearray(b'') # Test iterators that don't have a __length_hint__ a.extend(map(ord, orig * 25)) a.extend(ord(x) for x in orig * 25) self.assertEqual(a, orig * 50) self.assertEqual(a[-5:], orig) a = bytearray(b'') a.extend(iter(map(ord, orig * 50))) self.assertEqual(a, orig * 50) self.assertEqual(a[-5:], orig) a = bytearray(b'') a.extend(list(map(ord, orig * 50))) self.assertEqual(a, orig * 50) self.assertEqual(a[-5:], orig) a = bytearray(b'') self.assertRaises(ValueError, a.extend, [0, 1, 2, 256]) self.assertRaises(ValueError, a.extend, [0, 1, 2, -1]) self.assertEqual(len(a), 0) a = bytearray(b'') a.extend([Indexable(ord('a'))]) self.assertEqual(a, b'a') def test_remove(self): b = bytearray(b'hello') b.remove(ord('l')) self.assertEqual(b, b'helo') b.remove(ord('l')) self.assertEqual(b, b'heo') self.assertRaises(ValueError, lambda: b.remove(ord('l'))) self.assertRaises(ValueError, lambda: b.remove(400)) self.assertRaises(TypeError, lambda: b.remove(u'e')) # remove first and last b.remove(ord('o')) b.remove(ord('h')) self.assertEqual(b, b'e') self.assertRaises(TypeError, lambda: b.remove(u'e')) b.remove(Indexable(ord('e'))) self.assertEqual(b, b'') # test values outside of the ascii range: (0, 127) c = bytearray([126, 127, 128, 129]) c.remove(127) self.assertEqual(c, bytearray([126, 128, 129])) c.remove(129) self.assertEqual(c, bytearray([126, 128])) def test_pop(self): b = bytearray(b'world') self.assertEqual(b.pop(), ord('d')) self.assertEqual(b.pop(0), ord('w')) self.assertEqual(b.pop(-2), ord('r')) self.assertRaises(IndexError, lambda: b.pop(10)) self.assertRaises(IndexError, lambda: bytearray().pop()) # test for issue #6846 self.assertEqual(bytearray(b'\xff').pop(), 0xff) def test_nosort(self): self.assertRaises(AttributeError, lambda: bytearray().sort()) def test_append(self): b = bytearray(b'hell') b.append(ord('o')) self.assertEqual(b, b'hello') self.assertEqual(b.append(100), None) b = bytearray() b.append(ord('A')) self.assertEqual(len(b), 1) self.assertRaises(TypeError, lambda: b.append(u'o')) b = bytearray() b.append(Indexable(ord('A'))) self.assertEqual(b, b'A') def test_insert(self): b = bytearray(b'msssspp') b.insert(1, ord('i')) b.insert(4, ord('i')) b.insert(-2, ord('i')) b.insert(1000, ord('i')) self.assertEqual(b, b'mississippi') # allowed in 2.x #self.assertRaises(TypeError, lambda: b.insert(0, b'1')) b = bytearray() b.insert(0, Indexable(ord('A'))) self.assertEqual(b, b'A') def test_copied(self): # Issue 4348. Make sure that operations that don't mutate the array # copy the bytes. b = bytearray(b'abc') self.assertFalse(b is b.replace(b'abc', b'cde', 0)) t = bytearray([i for i in range(256)]) x = bytearray(b'') self.assertFalse(x is x.translate(t)) def test_partition_bytearray_doesnt_share_nullstring(self): a, b, c = bytearray(b"x").partition(b"y") self.assertEqual(b, b"") self.assertEqual(c, b"") self.assertTrue(b is not c) b += b"!" self.assertEqual(c, b"") a, b, c = bytearray(b"x").partition(b"y") self.assertEqual(b, b"") self.assertEqual(c, b"") # Same for rpartition b, c, a = bytearray(b"x").rpartition(b"y") self.assertEqual(b, b"") self.assertEqual(c, b"") self.assertTrue(b is not c) b += b"!" self.assertEqual(c, b"") c, b, a = bytearray(b"x").rpartition(b"y") self.assertEqual(b, b"") self.assertEqual(c, b"") def test_resize_forbidden(self): # #4509: can't resize a bytearray when there are buffer exports, even # if it wouldn't reallocate the underlying buffer. # Furthermore, no destructive changes to the buffer may be applied # before raising the error. b = bytearray(range(10)) v = memoryview(b) def resize(n): b[1:-1] = range(n + 1, 2*n - 1) resize(10) orig = b[:] self.assertRaises(BufferError, resize, 11) self.assertEqual(b, orig) self.assertRaises(BufferError, resize, 9) self.assertEqual(b, orig) self.assertRaises(BufferError, resize, 0) self.assertEqual(b, orig) # Other operations implying resize self.assertRaises(BufferError, b.pop, 0) self.assertEqual(b, orig) self.assertRaises(BufferError, b.remove, b[1]) self.assertEqual(b, orig) def delitem(): del b[1] self.assertRaises(BufferError, delitem) self.assertEqual(b, orig) # deleting a non-contiguous slice def delslice(): b[1:-1:2] = b"" self.assertRaises(BufferError, delslice) self.assertEqual(b, orig) def test_empty_bytearray(self): # Issue #7561: operations on empty bytearrays could crash in many # situations, due to a fragile implementation of the # PyByteArray_AS_STRING() C macro. self.assertRaises(ValueError, int, bytearray(b'')) def test_exhausted_iterator(self): a = self.type2test([1, 2, 3]) exhit = iter(a) empit = iter(a) for x in exhit: # exhaust the iterator next(empit) # not exhausted a.append(9) self.assertEqual(list(exhit), []) self.assertEqual(list(empit), [9]) self.assertEqual(a, self.type2test([1, 2, 3, 9])) class AssortedBytesTest(unittest.TestCase): # # Test various combinations of bytes and bytearray # @check_bytes_warnings def test_repr_str(self): for f in str, repr: self.assertEqual(f(bytearray()), "bytearray(b'')") self.assertEqual(f(bytearray([0])), "bytearray(b'\\x00')") self.assertEqual(f(bytearray([0, 1, 254, 255])), "bytearray(b'\\x00\\x01\\xfe\\xff')") self.assertEqual(f(b"abc"), "b'abc'") self.assertEqual(f(b"'"), '''b"'"''') # ''' self.assertEqual(f(b"'\""), r"""b'\'"'""") # ' def test_compare_bytes_to_bytearray(self): self.assertEqual(b"abc" == bytes(b"abc"), True) self.assertEqual(b"ab" != bytes(b"abc"), True) self.assertEqual(b"ab" <= bytes(b"abc"), True) self.assertEqual(b"ab" < bytes(b"abc"), True) self.assertEqual(b"abc" >= bytes(b"ab"), True) self.assertEqual(b"abc" > bytes(b"ab"), True) self.assertEqual(b"abc" != bytes(b"abc"), False) self.assertEqual(b"ab" == bytes(b"abc"), False) self.assertEqual(b"ab" > bytes(b"abc"), False) self.assertEqual(b"ab" >= bytes(b"abc"), False) self.assertEqual(b"abc" < bytes(b"ab"), False) self.assertEqual(b"abc" <= bytes(b"ab"), False) self.assertEqual(bytes(b"abc") == b"abc", True) self.assertEqual(bytes(b"ab") != b"abc", True) self.assertEqual(bytes(b"ab") <= b"abc", True) self.assertEqual(bytes(b"ab") < b"abc", True) self.assertEqual(bytes(b"abc") >= b"ab", True) self.assertEqual(bytes(b"abc") > b"ab", True) self.assertEqual(bytes(b"abc") != b"abc", False) self.assertEqual(bytes(b"ab") == b"abc", False) self.assertEqual(bytes(b"ab") > b"abc", False) self.assertEqual(bytes(b"ab") >= b"abc", False) self.assertEqual(bytes(b"abc") < b"ab", False) self.assertEqual(bytes(b"abc") <= b"ab", False) @test.test_support.requires_docstrings def test_doc(self): self.assertIsNotNone(bytearray.__doc__) self.assertTrue(bytearray.__doc__.startswith("bytearray("), bytearray.__doc__) self.assertIsNotNone(bytes.__doc__) self.assertTrue(bytes.__doc__.startswith("bytes("), bytes.__doc__) def test_from_bytearray(self): sample = bytes(b"Hello world\n\x80\x81\xfe\xff") buf = memoryview(sample) b = bytearray(buf) self.assertEqual(b, bytearray(sample)) @check_bytes_warnings def test_to_str(self): self.assertEqual(str(b''), "b''") self.assertEqual(str(b'x'), "b'x'") self.assertEqual(str(b'\x80'), "b'\\x80'") self.assertEqual(str(bytearray(b'')), "bytearray(b'')") self.assertEqual(str(bytearray(b'x')), "bytearray(b'x')") self.assertEqual(str(bytearray(b'\x80')), "bytearray(b'\\x80')") def test_literal(self): tests = [ (b"Wonderful spam", "Wonderful spam"), (br"Wonderful spam too", "Wonderful spam too"), (b"\xaa\x00\000\200", "\xaa\x00\000\200"), (br"\xaa\x00\000\200", r"\xaa\x00\000\200"), ] for b, s in tests: self.assertEqual(b, bytearray(s, 'latin-1')) for c in range(128, 256): self.assertRaises(SyntaxError, eval, 'b"%s"' % chr(c)) def test_translate(self): b = b'hello' ba = bytearray(b) rosetta = bytearray(range(0, 256)) rosetta[ord('o')] = ord('e') c = b.translate(rosetta, b'l') self.assertEqual(b, b'hello') self.assertEqual(c, b'hee') c = ba.translate(rosetta, b'l') self.assertEqual(ba, b'hello') self.assertEqual(c, b'hee') c = b.translate(None, b'e') self.assertEqual(c, b'hllo') c = ba.translate(None, b'e') self.assertEqual(c, b'hllo') self.assertRaises(TypeError, b.translate, None, None) self.assertRaises(TypeError, ba.translate, None, None) def test_split_bytearray(self): self.assertEqual(b'a b'.split(memoryview(b' ')), [b'a', b'b']) def test_rsplit_bytearray(self): self.assertEqual(b'a b'.rsplit(memoryview(b' ')), [b'a', b'b']) # Optimizations: # __iter__? (optimization) # __reversed__? (optimization) # XXX More string methods? (Those that don't use character properties) # There are tests in string_tests.py that are more # comprehensive for things like partition, etc. # Unfortunately they are all bundled with tests that # are not appropriate for bytes # I've started porting some of those into bytearray_tests.py, we should port # the rest that make sense (the code can be cleaned up to use modern # unittest methods at the same time). class BytearrayPEP3137Test(unittest.TestCase): def marshal(self, x): return bytearray(x) def test_returns_new_copy(self): val = self.marshal(b'1234') # On immutable types these MAY return a reference to themselves # but on mutable types like bytearray they MUST return a new copy. for methname in ('zfill', 'rjust', 'ljust', 'center'): method = getattr(val, methname) newval = method(3) self.assertEqual(val, newval) self.assertTrue(val is not newval, methname+' returned self on a mutable object') for expr in ('val.split()[0]', 'val.rsplit()[0]', 'val.partition(".")[0]', 'val.rpartition(".")[2]', 'val.splitlines()[0]', 'val.replace("", "")'): newval = eval(expr) self.assertEqual(val, newval) self.assertTrue(val is not newval, expr+' returned val on a mutable object') class ByteArrayAsStringTest(test.string_tests.CommonTest, test.string_tests.NonStringModuleTest): type2test = bytearray # Currently the bytes containment testing uses a single integer # value. This may not be the final design, but until then the # bytes section with in a bytes containment not valid def test_contains(self): pass def test_expandtabs(self): pass def test_upper(self): pass def test_lower(self): pass def test_hash(self): # XXX check this out pass class ByteArraySubclass(bytearray): pass class ByteArraySubclassTest(unittest.TestCase): def test_basic(self): self.assertTrue(issubclass(ByteArraySubclass, bytearray)) self.assertIsInstance(ByteArraySubclass(), bytearray) a, b = b"abcd", b"efgh" _a, _b = ByteArraySubclass(a), ByteArraySubclass(b) # test comparison operators with subclass instances self.assertTrue(_a == _a) self.assertTrue(_a != _b) self.assertTrue(_a < _b) self.assertTrue(_a <= _b) self.assertTrue(_b >= _a) self.assertTrue(_b > _a) self.assertTrue(_a is not a) # test concat of subclass instances self.assertEqual(a + b, _a + _b) self.assertEqual(a + b, a + _b) self.assertEqual(a + b, _a + b) # test repeat self.assertTrue(a*5 == _a*5) def test_join(self): # Make sure join returns a NEW object for single item sequences # involving a subclass. # Make sure that it is of the appropriate type. s1 = ByteArraySubclass(b"abcd") s2 = bytearray().join([s1]) self.assertTrue(s1 is not s2) self.assertTrue(type(s2) is bytearray, type(s2)) # Test reverse, calling join on subclass s3 = s1.join([b"abcd"]) self.assertTrue(type(s3) is bytearray) def test_pickle(self): a = ByteArraySubclass(b"abcd") a.x = 10 a.y = ByteArraySubclass(b"efgh") for proto in range(pickle.HIGHEST_PROTOCOL + 1): b = pickle.loads(pickle.dumps(a, proto)) self.assertNotEqual(id(a), id(b)) self.assertEqual(a, b) self.assertEqual(a.x, b.x) self.assertEqual(a.y, b.y) self.assertEqual(type(a), type(b)) self.assertEqual(type(a.y), type(b.y)) def test_copy(self): a = ByteArraySubclass(b"abcd") a.x = 10 a.y = ByteArraySubclass(b"efgh") for copy_method in (copy.copy, copy.deepcopy): b = copy_method(a) self.assertNotEqual(id(a), id(b)) self.assertEqual(a, b) self.assertEqual(a.x, b.x) self.assertEqual(a.y, b.y) self.assertEqual(type(a), type(b)) self.assertEqual(type(a.y), type(b.y)) def test_init_override(self): class subclass(bytearray): def __init__(self, newarg=1, *args, **kwargs): bytearray.__init__(self, *args, **kwargs) x = subclass(4, source=b"abcd") self.assertEqual(x, b"abcd") x = subclass(newarg=4, source=b"abcd") self.assertEqual(x, b"abcd") def test_main(): #test.test_support.run_unittest(BytesTest) #test.test_support.run_unittest(AssortedBytesTest) test.test_support.run_unittest( ByteArrayTest, ByteArrayAsStringTest, ByteArraySubclassTest, BytearrayPEP3137Test) if __name__ == "__main__": test_main()
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