Python XRootDPyFile.truncate方法代码示例

# 需要导入模块: from xrootdpyfs import XRootDPyFile [as 别名]
# 或者: from xrootdpyfs.XRootDPyFile import truncate [as 别名]
def test_truncate5(tmppath):
    """Test truncate() (no arg)."""
    fd = get_tsta_file(tmppath)
    fb = get_copy_file(fd)
    fp, fc = fd['full_path'], fd['contents']
    fp2 = fb['full_path']

    xfa = XRootDPyFile(mkurl(fp), 'r+')
    xfb = XRootDPyFile(mkurl(fp2), 'r+')

    acnts = xfa.read()
    assert acnts == xfb.read()

    # internal pointer starts at 0 in all 'r' modes.
    xtell = xfa.tell()
    assert xfa.tell() == xfb.tell()
    # f.truncate() and f.truncate(self.tell()) should be equivalent
    xfa.truncate(), xfb.truncate(xfb.tell())
    assert xfa.size == xfb.size
    assert xfa.tell() == xtell
    assert xfb.tell() == xtell
    assert xfb.read() == u''
    assert xfa.read() == u''

    xfa.seek(0), xfb.seek(0)
    are = xfa.read()
    assert are == fc
    assert are == xfb.read()

# 需要导入模块: from xrootdpyfs import XRootDPyFile [as 别名]
# 或者: from xrootdpyfs.XRootDPyFile import truncate [as 别名]
def test_write_binary(tmppath):
    """Tests for writing binary data to file."""
    fd = get_bin_testfile(tmppath)
    fp, fc = fd['full_path'], fd['contents']

    # Test w/ confirmed binary data read from a binary file
    xf_new = XRootDPyFile(mkurl(join(tmppath, 'data/tmp_bin')), 'wb+')
    xf_new.write(fc), xf_new.seek(0)
    assert xf_new.read() == fc

    xf_new.close()
    # Verify persistence.
    xf_new = XRootDPyFile(mkurl(join(tmppath, 'data/tmp_bin')), 'r+')
    assert xf_new.read() == fc

    # Test truncate
    xf_new.truncate()
    xf_new.seek(0)
    assert xf_new.read() == fc
    xf_new.close()

    # Test with bytearray
    xf_new = XRootDPyFile(mkurl(join(tmppath, 'data/tmp_bin')), 'wb+')
    barr = bytearray(range(0, 5))
    xf_new.write(barr), xf_new.seek(0)
    assert xf_new.read() == barr
    xf_new.close()

    # Verify persistence.
    xf_new = XRootDPyFile(mkurl(join(tmppath, 'data/tmp_bin')), 'r')
    assert xf_new.read() == barr
    xf_new.close()

# 需要导入模块: from xrootdpyfs import XRootDPyFile [as 别名]
# 或者: from xrootdpyfs.XRootDPyFile import truncate [as 别名]
def test_truncate_read_write2(tmppath):
    """Tests behaviour of writing after seek(0) after
       reading after truncating."""
    fd = get_tsta_file(tmppath)
    fb = get_copy_file(fd)
    fp, fc = fd['full_path'], fd['contents']
    fp2 = fb['full_path']

    sp = len(fc)//2
    wstr = "I am the string"

    pfile = open(fp2, 'r+')
    xfile = XRootDPyFile(mkurl(fp), 'r+')

    xfile.truncate(sp), pfile.truncate(sp)
    assert xfile.tell() == pfile.tell()
    assert xfile.read() == pfile.read()
    assert xfile.tell() == pfile.tell()

    xfile.seek(0), pfile.seek(0)
    assert xfile.tell() == pfile.tell()
    assert xfile.read() == pfile.read()
    xfile.seek(0), pfile.seek(0)

    xfile.write(wstr), pfile.write(wstr)
    assert xfile.tell() == pfile.tell()
    assert xfile.read() == pfile.read()
    xfile.seek(0), pfile.seek(0)
    assert xfile.read() == pfile.read()

# 需要导入模块: from xrootdpyfs import XRootDPyFile [as 别名]
# 或者: from xrootdpyfs.XRootDPyFile import truncate [as 别名]
def test_seek_args(tmppath):
    """Test seek() with a non-default whence argument."""
    fd = get_tsta_file(tmppath)
    fb = get_copy_file(fd)
    full_path, fc = fd['full_path'], fd['contents']

    xfile = XRootDPyFile(mkurl(full_path), 'r+')
    pfile = open(fb['full_path'], 'r+')

    xfile.truncate(3), pfile.truncate(3)
    xfile.seek(2, SEEK_END), pfile.seek(2, SEEK_END)
    assert xfile.tell() == pfile.tell()

    xfile.seek(3, SEEK_CUR), pfile.seek(3, SEEK_CUR)
    assert xfile.tell() == pfile.tell()

    xfile.seek(8, SEEK_SET), pfile.seek(8, SEEK_SET)
    assert xfile.tell() == pfile.tell()

    xfile.truncate(3), pfile.truncate(3)
    xfile.read(), pfile.read()
    assert xfile.tell() == pfile.tell()
    xfile.seek(8, SEEK_END), pfile.seek(8, SEEK_END)
    assert xfile.tell() == pfile.tell()

    xfile.seek(4, SEEK_CUR), pfile.seek(4, SEEK_CUR)
    assert xfile.tell() == pfile.tell()

    pytest.raises(NotImplementedError, xfile.seek, 0, 8)

# 需要导入模块: from xrootdpyfs import XRootDPyFile [as 别名]
# 或者: from xrootdpyfs.XRootDPyFile import truncate [as 别名]
def test_truncate3(tmppath):
    """Test truncate(0 < size < self._size)."""
    fd = get_mltl_file(tmppath)
    full_path, fc = fd['full_path'], fd['contents']
    xfile = XRootDPyFile(mkurl(full_path), 'r+')

    initcp = xfile.tell()

    newsiz = len(fc)//2
    xfile.truncate(newsiz)
    assert xfile.tell() == initcp
    xfile.seek(0)  # reset the internal pointer before reading
    assert xfile.read() == fc[:newsiz]

# 需要导入模块: from xrootdpyfs import XRootDPyFile [as 别名]
# 或者: from xrootdpyfs.XRootDPyFile import truncate [as 别名]
def test_truncate2(tmppath):
    """Test truncate(self._size)."""
    fd = get_tsta_file(tmppath)
    full_path, fc = fd['full_path'], fd['contents']
    xfile = XRootDPyFile(mkurl(full_path), 'r+')
    conts = xfile.read()
    assert conts == fc

    newsize = xfile.size
    xfile.truncate(newsize)
    assert xfile.tell() == newsize
    assert xfile.size == len(fc)
    xfile.seek(0)
    assert xfile.read() == conts

# 需要导入模块: from xrootdpyfs import XRootDPyFile [as 别名]
# 或者: from xrootdpyfs.XRootDPyFile import truncate [as 别名]
def test_truncate1(tmppath):
    """Test truncate(0)."""
    fd = get_tsta_file(tmppath)
    full_path, fc = fd['full_path'], fd['contents']
    xfile = XRootDPyFile(mkurl(full_path), 'r+')
    # r+ opens for r/w, and won't truncate the file automatically.
    assert xfile.read() == fc
    assert xfile.tell() == len(fc)
    xfile.seek(0)  # Reset ipp.
    assert xfile.tell() == 0

    # Truncate it to size 0.
    xfile.truncate(0)
    assert xfile.size == 0
    assert xfile.tell() == 0
    assert xfile.read() == ''
    assert xfile.tell() == 0
    xfile.close()

    # Re-open same file.
    xfile = XRootDPyFile(mkurl(full_path), 'r+')
    assert xfile.size == 0
    assert xfile.read() == ''

    # Truncate it again!
    xfile.truncate(0)
    assert xfile.size == 0
    assert xfile.read() == ''

    # Truncate it twice.
    xfile.truncate(0)
    assert xfile.size == 0
    assert xfile.read() == ''

    # Truncate to 1.
    xfile.truncate(1)
    assert xfile.tell() == 0
    assert xfile.size == 1
    xfile.seek(0)
    assert xfile.read() == '\x00'
    assert xfile.tell() == 1
    xfile.close()

    xfile = XRootDPyFile(mkurl(full_path), 'r+')
    assert xfile.size == 1
    assert xfile.read() == '\x00'

    # Mock it.
    fake_status = {
        "status": 3,
        "code": 0,
        "ok": False,
        "errno": errno.EREMOTE,
        "error": True,
        "message": '[FATAL] Remote I/O Error',
        "fatal": True,
        "shellcode": 51
    }
    xfile._file.truncate = Mock(return_value=(XRootDStatus(fake_status), None))
    pytest.raises(IOError, xfile.truncate, 0)

# 需要导入模块: from xrootdpyfs import XRootDPyFile [as 别名]
# 或者: from xrootdpyfs.XRootDPyFile import truncate [as 别名]
def test_seek_past_eof_wr(tmppath):
    """Tests read/write/truncate behaviour after seeking past the EOF, 'w+'"""
    fd = get_tsta_file(tmppath)
    fb = get_copy_file(fd)
    fp, fc = fd['full_path'], u''
    fp2 = fb['full_path']

    wstr = "www"
    eof = len(fc)
    skpnt = len(fc)+4

    pfile = open(fp2, 'w+')
    xfile = XRootDPyFile(mkurl(fp), 'w+')

    xfile.seek(skpnt), pfile.seek(skpnt)
    assert xfile.tell() == pfile.tell()
    assert xfile.read() == pfile.read()
    assert xfile.tell() == pfile.tell()
    assert xfile.tell() == skpnt

    xfile.write(wstr), pfile.write(wstr)
    assert xfile.tell() == pfile.tell()
    xfile.seek(eof), pfile.seek(eof)
    assert xfile.read() == pfile.read() == '\x00'*(skpnt-eof) + wstr
    assert xfile.tell() == pfile.tell()

    xfile.seek(0), pfile.seek(0)
    assert xfile.read() == pfile.read()

    xfile.truncate(skpnt), pfile.truncate(skpnt)
    assert xfile.tell() == pfile.tell() == skpnt + len(wstr)

    xfile.write(wstr), pfile.write(wstr)
    expected = fc + '\x00'*(skpnt-eof+len(wstr)) + wstr
    xfile.seek(0), pfile.seek(0)
    assert xfile.read() == pfile.read() == expected

# 需要导入模块: from xrootdpyfs import XRootDPyFile [as 别名]
# 或者: from xrootdpyfs.XRootDPyFile import truncate [as 别名]
def test_seek_past_eof_rw(tmppath):
    """Tests read/write/truncate behaviour after seeking past the EOF, 'r+'."""
    fd = get_tsta_file(tmppath)
    fb = get_copy_file(fd)
    fp, fc = fd["full_path"], fd["contents"]
    fp2 = fb["full_path"]

    wstr = "www"
    eof = len(fc)
    skpnt = len(fc) + 4

    pfile = open(fp2, "r+")
    xfile = XRootDPyFile(mkurl(fp), "r+")

    xfile.seek(skpnt), pfile.seek(skpnt)
    assert xfile.tell() == pfile.tell()
    assert xfile.read() == pfile.read()
    assert xfile.tell() == pfile.tell()
    assert xfile.tell() == skpnt

    xfile.write(wstr), pfile.write(wstr)
    assert xfile.tell() == pfile.tell()
    xfile.seek(eof), pfile.seek(eof)
    assert xfile.read() == pfile.read() == "\x00" * (skpnt - eof) + wstr
    assert xfile.tell() == pfile.tell()

    xfile.seek(0), pfile.seek(0)
    assert xfile.read() == pfile.read()

    xfile.truncate(skpnt), pfile.truncate(skpnt)
    assert xfile.tell() == pfile.tell() == skpnt + len(wstr)

    xfile.write(wstr), pfile.write(wstr)
    expected = fc + "\x00" * (skpnt - eof + len(wstr)) + wstr
    xfile.seek(0), pfile.seek(0)
    assert xfile.read() == pfile.read() == expected