kopia lustrzana https://github.com/micropython/micropython
tests/extmod: Add deflate.DeflateIO tests.
Signed-off-by: Jim Mussared <jim.mussared@gmail.com>pull/11905/head
Jim Mussared
Damien George
rodzic
3533924c36
commit
8b315ef0d8
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@ -0,0 +1,148 @@
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try:
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# Check if deflate is available.
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import deflate
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import io
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except ImportError:
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print("SKIP")
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raise SystemExit
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# Check if compression is enabled.
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if not hasattr(deflate.DeflateIO, "write"):
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print("SKIP")
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raise SystemExit
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# Simple compression & decompression.
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b = io.BytesIO()
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g = deflate.DeflateIO(b, deflate.RAW)
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data = b"micropython"
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N = 10
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for i in range(N):
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g.write(data)
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g.close()
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result_raw = b.getvalue()
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print(len(result_raw) < len(data) * N)
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b = io.BytesIO(result_raw)
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g = deflate.DeflateIO(b, deflate.RAW)
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print(g.read())
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# Same, but using a context manager.
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b = io.BytesIO()
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with deflate.DeflateIO(b, deflate.RAW) as g:
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for i in range(N):
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g.write(data)
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result_raw = b.getvalue()
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print(len(result_raw) < len(data) * N)
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b = io.BytesIO(result_raw)
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with deflate.DeflateIO(b, deflate.RAW) as g:
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print(g.read())
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# Writing to a closed underlying stream.
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b = io.BytesIO()
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g = deflate.DeflateIO(b, deflate.RAW)
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g.write(b"micropython")
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b.close()
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try:
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g.write(b"micropython")
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except ValueError:
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print("ValueError")
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# Writing to a closed DeflateIO.
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b = io.BytesIO()
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g = deflate.DeflateIO(b, deflate.RAW)
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g.write(b"micropython")
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g.close()
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try:
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g.write(b"micropython")
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except OSError:
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print("OSError")
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def decompress(data, *args):
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buf = io.BytesIO(data)
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with deflate.DeflateIO(buf, *args) as g:
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return g.read()
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def compress(data, *args):
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b = io.BytesIO()
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with deflate.DeflateIO(b, *args) as g:
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g.write(data)
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return b.getvalue()
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def compress_error(data, *args):
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try:
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compress(data, *args)
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except OSError:
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print("OSError")
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except ValueError:
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print("ValueError")
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# More test patterns.
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PATTERNS_RAW = (
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(b"0", b"3\x00\x00"),
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(b"a", b"K\x04\x00"),
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(b"0" * 100, b"3\xa0\x03\x00\x00"),
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(
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bytes(range(64)),
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b"c`dbfaec\xe7\xe0\xe4\xe2\xe6\xe1\xe5\xe3\x17\x10\x14\x12\x16\x11\x15\x13\x97\x90\x94\x92\x96\x91\x95\x93WPTRVQUS\xd7\xd0\xd4\xd2\xd6\xd1\xd5\xd370426153\xb7\xb0\xb4\xb2\xb6\xb1\xb5\xb3\x07\x00",
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),
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)
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for unpacked, packed in PATTERNS_RAW:
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print(compress(unpacked) == packed)
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print(compress(unpacked, deflate.RAW) == packed)
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# Verify header and checksum format.
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unpacked = b"hello"
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packed = b"\xcbH\xcd\xc9\xc9\x07\x00"
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def check_header(n, a, b):
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if a == b:
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print(n)
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else:
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print(n, a, b)
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check_header("RAW", compress(unpacked, deflate.RAW), packed)
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check_header(
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"ZLIB(9)", compress(unpacked, deflate.ZLIB, 9), b"\x18\x95" + packed + b"\x06,\x02\x15"
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)
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check_header(
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"ZLIB(15)", compress(unpacked, deflate.ZLIB, 15), b"\x78\x9c" + packed + b"\x06,\x02\x15"
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)
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check_header(
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"GZIP",
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compress(unpacked, deflate.GZIP, 9),
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b"\x1f\x8b\x08\x00\x00\x00\x00\x00\x04\x03" + packed + b"\x86\xa6\x106\x05\x00\x00\x00",
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)
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# Valid wbits values.
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compress_error(unpacked, deflate.RAW, -1)
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print(len(compress(unpacked, deflate.RAW, 0)))
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compress_error(unpacked, deflate.RAW, 1)
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compress_error(unpacked, deflate.RAW, 4)
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for i in range(5, 16):
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print(len(compress(unpacked, deflate.RAW, i)))
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compress_error(unpacked, deflate.RAW, 16)
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# Invalid values for format.
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compress_error(unpacked, -1)
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compress_error(unpacked, 5)
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# Fill buf with a predictable pseudorandom sequence.
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buf = bytearray(1024)
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lfsr = 1 << 15 | 1
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for i in range(len(buf)):
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bit = (lfsr ^ (lfsr >> 1) ^ (lfsr >> 3) ^ (lfsr >> 12)) & 1
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lfsr = (lfsr >> 1) | (bit << 15)
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buf[i] = lfsr & 0xFF
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# Verify that compression improves as the window size increases.
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prev_len = len(buf)
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for wbits in range(5, 10):
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result = compress(buf, deflate.RAW, wbits)
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next_len = len(result)
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print(next_len < prev_len and decompress(result, deflate.RAW, wbits) == buf)
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prev_len = next_len
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@ -0,0 +1,41 @@
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True
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b'micropythonmicropythonmicropythonmicropythonmicropythonmicropythonmicropythonmicropythonmicropythonmicropython'
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True
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b'micropythonmicropythonmicropythonmicropythonmicropythonmicropythonmicropythonmicropythonmicropythonmicropython'
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ValueError
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OSError
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True
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True
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True
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True
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True
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True
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True
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True
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RAW
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ZLIB(9)
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ZLIB(15)
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GZIP
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ValueError
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7
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ValueError
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ValueError
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7
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7
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7
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7
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7
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7
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7
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7
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7
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7
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7
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ValueError
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ValueError
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ValueError
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False
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True
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True
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True
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True
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@ -0,0 +1,174 @@
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try:
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# Check if deflate is available.
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import deflate
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import io
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except ImportError:
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print("SKIP")
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raise SystemExit
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# zlib.compress(b'micropython hello world hello world micropython', wbits=-9)
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data_raw = b'\xcb\xcdL.\xca/\xa8,\xc9\xc8\xcfS\xc8H\xcd\xc9\xc9W(\xcf/\xcaIAa\xe7"\xd4\x00\x00'
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# zlib.compress(b'micropython hello world hello world micropython', wbits=9)
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data_zlib = b'\x18\x95\xcb\xcdL.\xca/\xa8,\xc9\xc8\xcfS\xc8H\xcd\xc9\xc9W(\xcf/\xcaIAa\xe7"\xd4\x00\x00\xbc\xfa\x12\x91'
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# zlib.compress(b'micropython hello world hello world micropython', wbits=25)
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data_gzip = b'\x1f\x8b\x08\x00\x00\x00\x00\x00\x00\x03\xcb\xcdL.\xca/\xa8,\xc9\xc8\xcfS\xc8H\xcd\xc9\xc9W(\xcf/\xcaIAa\xe7"\xd4\x00\x00"\xeb\xc4\x98/\x00\x00\x00'
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# compress(b'hello' + bytearray(300) + b'hello', format=deflate.RAW, 5)
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data_wbits_5 = b"\xcbH\xcd\xc9\xc9g\x18\xe9\x00\x08\x88\x95\xcfH\xcd\xc9\xc9\x07\x00"
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# compress(b'hello' + bytearray(300) + b'hello', format=deflate.RAW, 6)
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data_wbits_6 = b"\xcbH\xcd\xc9\xc9g\x18\xe9\x00\x08\x88\xd5\x9f\x91\x9a\x93\x93\x0f\x00"
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# compress(b'hello' + bytearray(300) + b'hello', format=deflate.RAW, 8)
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data_wbits_8 = b"\xcbH\xcd\xc9\xc9g\x18\xe9\x00\x08\x88\xf5\x7fFjNN>\x00"
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# compress(b'hello' + bytearray(2000) + b'hello', format=deflate.RAW, 10)
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data_wbits_10 = b"\xcbH\xcd\xc9\xc9g\x18\xe9\x00\x08Fz\x18\x00\xc3`\xa4'\x03`2\x18\xe99\x01\x98\x13Fz\xfe\x07\xe6\xff\x91\x9e\xff\x81\xf9\x7f\xa4\xe7\x7f`\xfe\x1f\xba\xf9?#5''\x1f\x00"
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def decompress(data, *args):
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buf = io.BytesIO(data)
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with deflate.DeflateIO(buf, *args) as g:
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return g.read()
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def decompress_error(data, *args):
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try:
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decompress(data, *args)
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except OSError:
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print("OSError")
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except EOFError:
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print("EOFError")
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except ValueError:
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print("ValueError")
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# Basic handling of format and detection.
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print(decompress(data_raw, deflate.RAW))
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print(decompress(data_zlib, deflate.ZLIB))
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print(decompress(data_gzip, deflate.GZIP))
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print(decompress(data_zlib)) # detect zlib/gzip.
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print(decompress(data_gzip)) # detect zlib/gzip.
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decompress_error(data_raw) # cannot detect zlib/gzip from raw stream
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decompress_error(data_raw, deflate.ZLIB)
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decompress_error(data_raw, deflate.GZIP)
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decompress_error(data_zlib, deflate.RAW)
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decompress_error(data_zlib, deflate.GZIP)
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decompress_error(data_gzip, deflate.RAW)
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decompress_error(data_gzip, deflate.ZLIB)
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# Invalid data stream.
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decompress_error(b"abcef", deflate.RAW)
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# Invalid block type. final-block, block-type=3.
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decompress_error(b"\x07", deflate.RAW)
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# Truncated stream.
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decompress_error(data_raw[:10], deflate.RAW)
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# Partial reads.
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buf = io.BytesIO(data_zlib)
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with deflate.DeflateIO(buf) as g:
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print(buf.seek(0, 1)) # verify stream is not read until first read of the DeflateIO stream.
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print(g.read(1))
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print(buf.seek(0, 1)) # verify that only the minimal amount is read from the source
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print(g.read(1))
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print(buf.seek(0, 1))
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print(g.read(2))
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print(buf.seek(0, 1))
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print(g.read())
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print(buf.seek(0, 1))
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print(g.read(1))
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print(buf.seek(0, 1))
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print(g.read())
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# Invalid zlib checksum (+ length for gzip). Note: only checksum errors are
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# currently detected, see the end of uzlib_uncompress_chksum().
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decompress_error(data_zlib[:-4] + b"\x00\x00\x00\x00")
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decompress_error(data_gzip[:-8] + b"\x00\x00\x00\x00\x00\x00\x00\x00")
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decompress_error(data_zlib[:-4] + b"\x00\x00\x00\x00", deflate.ZLIB)
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decompress_error(data_gzip[:-8] + b"\x00\x00\x00\x00\x00\x00\x00\x00", deflate.GZIP)
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# Reading from a closed underlying stream.
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b = io.BytesIO(data_raw)
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g = deflate.DeflateIO(b, deflate.RAW)
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g.read(4)
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b.close()
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try:
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g.read(4)
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except ValueError:
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print("ValueError")
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# Reading from a closed DeflateIO.
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b = io.BytesIO(data_raw)
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g = deflate.DeflateIO(b, deflate.RAW)
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g.read(4)
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g.close()
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try:
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g.read(4)
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except OSError:
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print("OSError")
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# Gzip header with extra flags (FCOMMENT FNAME FEXTRA FHCRC) enabled.
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data_gzip_header_extra = b"\x1f\x8b\x08\x1e}\x9a\x9bd\x02\x00\x00\x00\x00\x00\x00\xff\xcb\xcdL.\xca/\xa8,\xc9\xc8\xcf\x03\x00\xf2KF>\x0b\x00\x00\x00"
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print(decompress(data_gzip_header_extra))
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# Test patterns.
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PATTERNS_ZLIB = [
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# Packed results produced by CPy's zlib.compress()
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(b"0", b"x\x9c3\x00\x00\x001\x001"),
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(b"a", b"x\x9cK\x04\x00\x00b\x00b"),
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(b"0" * 100, b"x\x9c30\xa0=\x00\x00\xb3q\x12\xc1"),
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(
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bytes(range(64)),
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b"x\x9cc`dbfaec\xe7\xe0\xe4\xe2\xe6\xe1\xe5\xe3\x17\x10\x14\x12\x16\x11\x15\x13\x97\x90\x94\x92\x96\x91\x95\x93WPTRVQUS\xd7\xd0\xd4\xd2\xd6\xd1\xd5\xd370426153\xb7\xb0\xb4\xb2\xb6\xb1\xb5\xb3\x07\x00\xaa\xe0\x07\xe1",
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),
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(b"hello", b"x\x01\x01\x05\x00\xfa\xffhello\x06,\x02\x15"), # compression level 0
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# adaptive/dynamic huffman tree
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(
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b"13371813150|13764518736|12345678901",
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b"x\x9c\x05\xc1\x81\x01\x000\x04\x04\xb1\x95\\\x1f\xcfn\x86o\x82d\x06Qq\xc8\x9d\xc5X}<e\xb5g\x83\x0f\x89X\x07\xab",
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),
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# dynamic Huffman tree with "case 17" (repeat code for 3-10 times)
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(
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b">I}\x00\x951D>I}\x00\x951D>I}\x00\x951D>I}\x00\x951D",
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b"x\x9c\x05\xc11\x01\x00\x00\x00\x010\x95\x14py\x84\x12C_\x9bR\x8cV\x8a\xd1J1Z)F\x1fw`\x089",
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),
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]
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for unpacked, packed in PATTERNS_ZLIB:
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print(decompress(packed) == unpacked)
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print(decompress(packed, deflate.ZLIB) == unpacked)
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# Older version's of CPython's zlib module still included the checksum and length (as if it were a zlib/gzip stream).
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# Make sure there're no problem decompressing this.
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data_raw_with_footer = data_raw + b"\x00\x00\x00\x00\x00\x00\x00\x00"
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print(decompress(data_raw_with_footer, deflate.RAW))
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# Valid wbits values.
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decompress_error(data_wbits_5, deflate.RAW, -1)
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print(len(decompress(data_wbits_5, deflate.RAW, 0)))
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decompress_error(data_wbits_5, deflate.RAW, 1)
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decompress_error(data_wbits_5, deflate.RAW, 4)
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for i in range(5, 16):
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print(len(decompress(data_wbits_5, deflate.RAW, i)))
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decompress_error(data_wbits_5, deflate.RAW, 16)
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# Invalid values for format.
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decompress_error(data_raw, -1)
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decompress_error(data_raw, 5)
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# Data that requires a higher wbits value.
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decompress_error(data_wbits_6, deflate.RAW, 5)
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print(len(decompress(data_wbits_6, deflate.RAW, 6)))
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print(len(decompress(data_wbits_6, deflate.RAW, 7)))
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decompress_error(data_wbits_8, deflate.RAW, 7)
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print(len(decompress(data_wbits_8, deflate.RAW, 8)))
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print(len(decompress(data_wbits_8, deflate.RAW, 9)))
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decompress_error(data_wbits_10, deflate.RAW)
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decompress_error(data_wbits_10, deflate.RAW, 9)
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print(len(decompress(data_wbits_10, deflate.RAW, 10)))
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# zlib header sets the size, so works with wbits unset or wbits >= 10.
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data_wbits_10_zlib = b"(\x91\xcbH\xcd\xc9\xc9g\x18\xe9\x00\x08Fz\x18\x00\xc3`\xa4'\x03`2\x18\xe99\x01\x98\x13Fz\xfe\x07\xe6\xff\x91\x9e\xff\x81\xf9\x7f\xa4\xe7\x7f`\xfe\x1f\xba\xf9?#5''\x1f\x00[\xbc\x04)"
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print(len(decompress(data_wbits_10_zlib, deflate.ZLIB)))
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decompress_error(data_wbits_10_zlib, deflate.ZLIB, 9)
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print(len(decompress(data_wbits_10_zlib, deflate.ZLIB, 10)))
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print(len(decompress(data_wbits_10_zlib)))
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@ -0,0 +1,80 @@
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b'micropython hello world hello world micropython'
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b'micropython hello world hello world micropython'
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b'micropython hello world hello world micropython'
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b'micropython hello world hello world micropython'
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b'micropython hello world hello world micropython'
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OSError
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OSError
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OSError
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OSError
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OSError
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OSError
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OSError
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OSError
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OSError
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EOFError
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0
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||||
b'm'
|
||||
4
|
||||
b'i'
|
||||
5
|
||||
b'cr'
|
||||
7
|
||||
b'opython hello world hello world micropython'
|
||||
36
|
||||
b''
|
||||
36
|
||||
b''
|
||||
OSError
|
||||
OSError
|
||||
OSError
|
||||
OSError
|
||||
ValueError
|
||||
OSError
|
||||
b'micropython'
|
||||
True
|
||||
True
|
||||
True
|
||||
True
|
||||
True
|
||||
True
|
||||
True
|
||||
True
|
||||
True
|
||||
True
|
||||
True
|
||||
True
|
||||
True
|
||||
True
|
||||
b'micropython hello world hello world micropython'
|
||||
ValueError
|
||||
310
|
||||
ValueError
|
||||
ValueError
|
||||
310
|
||||
310
|
||||
310
|
||||
310
|
||||
310
|
||||
310
|
||||
310
|
||||
310
|
||||
310
|
||||
310
|
||||
310
|
||||
ValueError
|
||||
ValueError
|
||||
ValueError
|
||||
OSError
|
||||
310
|
||||
310
|
||||
OSError
|
||||
310
|
||||
310
|
||||
OSError
|
||||
OSError
|
||||
2010
|
||||
2010
|
||||
OSError
|
||||
2010
|
||||
2010
|
||||
|
|
@ -0,0 +1,89 @@
|
|||
# Test deflate module with stream errors.
|
||||
|
||||
try:
|
||||
# Check if deflate & IOBase are available.
|
||||
import deflate, io
|
||||
|
||||
io.IOBase
|
||||
except (ImportError, AttributeError):
|
||||
print("SKIP")
|
||||
raise SystemExit
|
||||
|
||||
# Check if compression is enabled.
|
||||
if not hasattr(deflate.DeflateIO, "write"):
|
||||
print("SKIP")
|
||||
raise SystemExit
|
||||
|
||||
formats = (deflate.RAW, deflate.ZLIB, deflate.GZIP)
|
||||
|
||||
# Test error on read when decompressing.
|
||||
|
||||
|
||||
class Stream(io.IOBase):
|
||||
def readinto(self, buf):
|
||||
print("Stream.readinto", len(buf))
|
||||
return -1
|
||||
|
||||
|
||||
try:
|
||||
deflate.DeflateIO(Stream()).read()
|
||||
except OSError as er:
|
||||
print(repr(er))
|
||||
|
||||
# Test error on write when compressing.
|
||||
|
||||
|
||||
class Stream(io.IOBase):
|
||||
def write(self, buf):
|
||||
print("Stream.write", buf)
|
||||
return -1
|
||||
|
||||
|
||||
for format in formats:
|
||||
try:
|
||||
deflate.DeflateIO(Stream(), format).write("a")
|
||||
except OSError as er:
|
||||
print(repr(er))
|
||||
|
||||
# Test write after close.
|
||||
|
||||
|
||||
class Stream(io.IOBase):
|
||||
def write(self, buf):
|
||||
print("Stream.write", buf)
|
||||
return -1
|
||||
|
||||
def ioctl(self, cmd, arg):
|
||||
print("Stream.ioctl", cmd, arg)
|
||||
return 0
|
||||
|
||||
|
||||
try:
|
||||
d = deflate.DeflateIO(Stream(), deflate.RAW, 0, True)
|
||||
d.close()
|
||||
d.write("a")
|
||||
except OSError as er:
|
||||
print(repr(er))
|
||||
|
||||
# Test error on write when closing.
|
||||
|
||||
|
||||
class Stream(io.IOBase):
|
||||
def __init__(self):
|
||||
self.num_writes = 0
|
||||
|
||||
def write(self, buf):
|
||||
print("Stream.write", buf)
|
||||
if self.num_writes >= 4:
|
||||
return -1
|
||||
self.num_writes += 1
|
||||
return len(buf)
|
||||
|
||||
|
||||
for format in formats:
|
||||
d = deflate.DeflateIO(Stream(), format)
|
||||
d.write("a")
|
||||
try:
|
||||
d.close()
|
||||
except OSError as er:
|
||||
print(repr(er))
|
||||
|
|
@ -0,0 +1,25 @@
|
|||
Stream.readinto 1
|
||||
OSError(1,)
|
||||
Stream.write bytearray(b'K')
|
||||
OSError(1,)
|
||||
Stream.write bytearray(b'\x18\x95')
|
||||
OSError(22,)
|
||||
Stream.write bytearray(b'\x1f\x8b\x08\x00\x00\x00\x00\x00\x04\x03')
|
||||
OSError(22,)
|
||||
Stream.ioctl 4 0
|
||||
OSError(22,)
|
||||
Stream.write bytearray(b'K')
|
||||
Stream.write bytearray(b'\x04')
|
||||
Stream.write bytearray(b'\x00')
|
||||
Stream.write bytearray(b'\x18\x95')
|
||||
Stream.write bytearray(b'K')
|
||||
Stream.write bytearray(b'\x04')
|
||||
Stream.write bytearray(b'\x00')
|
||||
Stream.write bytearray(b'\x00b\x00b')
|
||||
OSError(1,)
|
||||
Stream.write bytearray(b'\x1f\x8b\x08\x00\x00\x00\x00\x00\x04\x03')
|
||||
Stream.write bytearray(b'K')
|
||||
Stream.write bytearray(b'\x04')
|
||||
Stream.write bytearray(b'\x00')
|
||||
Stream.write bytearray(b'C\xbe\xb7\xe8\x01\x00\x00\x00')
|
||||
OSError(1,)
|
||||
Ładowanie…
Reference in New Issue