demo + utils venv

2019-02-03 13:40:10 +01:00
parent 5fa112490b
commit cfa9c8ea23
5994 changed files with 1353819 additions and 0 deletions
@@ -0,0 +1,4 @@
+function [a, b] = afunc(c, d)
+% A function
+a = c + 1;
+b = d + 10;
@@ -0,0 +1,5 @@
+Japanese: 
+すべての人間は、生まれながらにして自由であり、
+かつ、尊厳と権利と について平等である。
+人間は、理性と良心とを授けられており、
+互いに同胞の精神をもって行動しなければならない。
@@ -0,0 +1,50 @@
+% Generates mat files for loadmat unit tests
+% Uses save_matfile.m function
+% This is the version for matlab 4
+
+% work out matlab version and file suffix for test files
+global FILEPREFIX FILESUFFIX
+sepchar = '/';
+if strcmp(computer, 'PCWIN'), sepchar = '\'; end
+FILEPREFIX = [pwd sepchar 'data' sepchar];
+mlv = version;
+FILESUFFIX = ['_' mlv '_' computer '.mat'];
+
+% basic double array
+theta = 0:pi/4:2*pi;
+save_matfile('testdouble', theta);
+
+% string
+save_matfile('teststring', '"Do nine men interpret?" "Nine men," I nod.')
+
+% complex
+save_matfile('testcomplex', cos(theta) + 1j*sin(theta));
+
+% asymmetric array to check indexing
+a = zeros(3, 5);
+a(:,1) = [1:3]';
+a(1,:) = 1:5;
+
+% 2D matrix
+save_matfile('testmatrix', a);
+
+% minus number - tests signed int 
+save_matfile('testminus', -1);
+
+% single character
+save_matfile('testonechar', 'r');
+
+% string array
+save_matfile('teststringarray', ['one  '; 'two  '; 'three']);
+
+% sparse array
+save_matfile('testsparse', sparse(a));
+
+% sparse complex array
+b = sparse(a);
+b(1,1) = b(1,1) + j;
+save_matfile('testsparsecomplex', b);
+
+% Two variables in same file
+save([FILEPREFIX 'testmulti' FILESUFFIX], 'a', 'theta')
+
@@ -0,0 +1,100 @@
+% Generates mat files for loadmat unit tests
+% This is the version for matlab 5 and higher
+% Uses save_matfile.m function
+
+% work out matlab version and file suffix for test files
+global FILEPREFIX FILESUFFIX
+FILEPREFIX = [fullfile(pwd, 'data') filesep];
+temp = ver('MATLAB');
+mlv = temp.Version;
+FILESUFFIX = ['_' mlv '_' computer '.mat'];
+
+% basic double array
+theta = 0:pi/4:2*pi;
+save_matfile('testdouble', theta);
+
+% string
+save_matfile('teststring', '"Do nine men interpret?" "Nine men," I nod.')
+
+% complex
+save_matfile('testcomplex', cos(theta) + 1j*sin(theta));
+
+% asymmetric array to check indexing
+a = zeros(3, 5);
+a(:,1) = [1:3]';
+a(1,:) = 1:5;
+
+% 2D matrix
+save_matfile('testmatrix', a);
+
+% minus number - tests signed int 
+save_matfile('testminus', -1);
+
+% single character
+save_matfile('testonechar', 'r');
+
+% string array
+save_matfile('teststringarray', ['one  '; 'two  '; 'three']);
+
+% sparse array
+save_matfile('testsparse', sparse(a));
+
+% sparse complex array
+b = sparse(a);
+b(1,1) = b(1,1) + j;
+save_matfile('testsparsecomplex', b);
+
+% Two variables in same file
+save([FILEPREFIX 'testmulti' FILESUFFIX], 'a', 'theta')
+
+
+% struct
+save_matfile('teststruct', ...
+	  struct('stringfield','Rats live on no evil star.',...
+		 'doublefield',[sqrt(2) exp(1) pi],...
+		 'complexfield',(1+1j)*[sqrt(2) exp(1) pi]));
+
+% cell
+save_matfile('testcell', ...
+	  {['This cell contains this string and 3 arrays of increasing' ...
+	    ' length'], 1., 1.:2., 1.:3.});
+
+% scalar cell
+save_matfile('testscalarcell', {1})
+
+% Empty cells in two cell matrices
+save_matfile('testemptycell', {1, 2, [], [], 3});
+
+% 3D matrix
+save_matfile('test3dmatrix', reshape(1:24,[2 3 4]))
+
+% nested cell array
+save_matfile('testcellnest', {1, {2, 3, {4, 5}}});
+
+% nested struct
+save_matfile('teststructnest', struct('one', 1, 'two', ...
+				   struct('three', 'number 3')));
+
+% array of struct
+save_matfile('teststructarr', [struct('one', 1, 'two', 2) ...
+		    struct('one', 'number 1', 'two', 'number 2')]);
+
+% matlab object
+save_matfile('testobject', inline('x'))
+
+% array of matlab objects
+%save_matfile('testobjarr', [inline('x') inline('x')])
+
+% unicode test
+if str2num(mlv) > 7  % function added 7.0.1
+  fid = fopen([FILEPREFIX 'japanese_utf8.txt']);
+  from_japan = fread(fid, 'uint8')';
+  fclose(fid);
+  save_matfile('testunicode', native2unicode(from_japan, 'utf-8'));
+end
+  
+% func
+if str2num(mlv) > 7  % function pointers added recently
+  func = @afunc;
+  save_matfile('testfunc', func);
+end
@@ -0,0 +1,6 @@
+function save_matfile(test_name, v)
+% saves variable passed in m with filename from prefix
+  
+global FILEPREFIX FILESUFFIX
+eval([test_name ' = v;']);
+save([FILEPREFIX test_name FILESUFFIX], test_name)
@@ -0,0 +1,31 @@
+''' Tests for byteorder module '''
+
+from __future__ import division, print_function, absolute_import
+
+import sys
+
+from numpy.testing import assert_
+from pytest import raises as assert_raises
+
+import scipy.io.matlab.byteordercodes as sibc
+
+
+def test_native():
+    native_is_le = sys.byteorder == 'little'
+    assert_(sibc.sys_is_le == native_is_le)
+
+
+def test_to_numpy():
+    if sys.byteorder == 'little':
+        assert_(sibc.to_numpy_code('native') == '<')
+        assert_(sibc.to_numpy_code('swapped') == '>')
+    else:
+        assert_(sibc.to_numpy_code('native') == '>')
+        assert_(sibc.to_numpy_code('swapped') == '<')
+    assert_(sibc.to_numpy_code('native') == sibc.to_numpy_code('='))
+    assert_(sibc.to_numpy_code('big') == '>')
+    for code in ('little', '<', 'l', 'L', 'le'):
+        assert_(sibc.to_numpy_code(code) == '<')
+    for code in ('big', '>', 'b', 'B', 'be'):
+        assert_(sibc.to_numpy_code(code) == '>')
+    assert_raises(ValueError, sibc.to_numpy_code, 'silly string')
@@ -0,0 +1,185 @@
+""" Testing mio5_utils Cython module
+
+"""
+from __future__ import division, print_function, absolute_import
+
+import sys
+
+from io import BytesIO
+cStringIO = BytesIO
+
+import numpy as np
+
+from numpy.testing import assert_array_equal, assert_equal, assert_
+from pytest import raises as assert_raises
+
+from scipy._lib.six import u
+
+import scipy.io.matlab.byteordercodes as boc
+import scipy.io.matlab.streams as streams
+import scipy.io.matlab.mio5_params as mio5p
+import scipy.io.matlab.mio5_utils as m5u
+
+
+def test_byteswap():
+    for val in (
+        1,
+        0x100,
+        0x10000):
+        a = np.array(val, dtype=np.uint32)
+        b = a.byteswap()
+        c = m5u.byteswap_u4(a)
+        assert_equal(b.item(), c)
+        d = m5u.byteswap_u4(c)
+        assert_equal(a.item(), d)
+
+
+def _make_tag(base_dt, val, mdtype, sde=False):
+    ''' Makes a simple matlab tag, full or sde '''
+    base_dt = np.dtype(base_dt)
+    bo = boc.to_numpy_code(base_dt.byteorder)
+    byte_count = base_dt.itemsize
+    if not sde:
+        udt = bo + 'u4'
+        padding = 8 - (byte_count % 8)
+        all_dt = [('mdtype', udt),
+                  ('byte_count', udt),
+                  ('val', base_dt)]
+        if padding:
+            all_dt.append(('padding', 'u1', padding))
+    else:  # is sde
+        udt = bo + 'u2'
+        padding = 4-byte_count
+        if bo == '<':  # little endian
+            all_dt = [('mdtype', udt),
+                      ('byte_count', udt),
+                      ('val', base_dt)]
+        else:  # big endian
+            all_dt = [('byte_count', udt),
+                      ('mdtype', udt),
+                      ('val', base_dt)]
+        if padding:
+            all_dt.append(('padding', 'u1', padding))
+    tag = np.zeros((1,), dtype=all_dt)
+    tag['mdtype'] = mdtype
+    tag['byte_count'] = byte_count
+    tag['val'] = val
+    return tag
+
+
+def _write_stream(stream, *strings):
+    stream.truncate(0)
+    stream.seek(0)
+    for s in strings:
+        stream.write(s)
+    stream.seek(0)
+
+
+def _make_readerlike(stream, byte_order=boc.native_code):
+    class R(object):
+        pass
+    r = R()
+    r.mat_stream = stream
+    r.byte_order = byte_order
+    r.struct_as_record = True
+    r.uint16_codec = sys.getdefaultencoding()
+    r.chars_as_strings = False
+    r.mat_dtype = False
+    r.squeeze_me = False
+    return r
+
+
+def test_read_tag():
+    # mainly to test errors
+    # make reader-like thing
+    str_io = BytesIO()
+    r = _make_readerlike(str_io)
+    c_reader = m5u.VarReader5(r)
+    # This works for StringIO but _not_ cStringIO
+    assert_raises(IOError, c_reader.read_tag)
+    # bad SDE
+    tag = _make_tag('i4', 1, mio5p.miINT32, sde=True)
+    tag['byte_count'] = 5
+    _write_stream(str_io, tag.tostring())
+    assert_raises(ValueError, c_reader.read_tag)
+
+
+def test_read_stream():
+    tag = _make_tag('i4', 1, mio5p.miINT32, sde=True)
+    tag_str = tag.tostring()
+    str_io = cStringIO(tag_str)
+    st = streams.make_stream(str_io)
+    s = streams._read_into(st, tag.itemsize)
+    assert_equal(s, tag.tostring())
+
+
+def test_read_numeric():
+    # make reader-like thing
+    str_io = cStringIO()
+    r = _make_readerlike(str_io)
+    # check simplest of tags
+    for base_dt, val, mdtype in (('u2', 30, mio5p.miUINT16),
+                                 ('i4', 1, mio5p.miINT32),
+                                 ('i2', -1, mio5p.miINT16)):
+        for byte_code in ('<', '>'):
+            r.byte_order = byte_code
+            c_reader = m5u.VarReader5(r)
+            assert_equal(c_reader.little_endian, byte_code == '<')
+            assert_equal(c_reader.is_swapped, byte_code != boc.native_code)
+            for sde_f in (False, True):
+                dt = np.dtype(base_dt).newbyteorder(byte_code)
+                a = _make_tag(dt, val, mdtype, sde_f)
+                a_str = a.tostring()
+                _write_stream(str_io, a_str)
+                el = c_reader.read_numeric()
+                assert_equal(el, val)
+                # two sequential reads
+                _write_stream(str_io, a_str, a_str)
+                el = c_reader.read_numeric()
+                assert_equal(el, val)
+                el = c_reader.read_numeric()
+                assert_equal(el, val)
+
+
+def test_read_numeric_writeable():
+    # make reader-like thing
+    str_io = cStringIO()
+    r = _make_readerlike(str_io, '<')
+    c_reader = m5u.VarReader5(r)
+    dt = np.dtype('<u2')
+    a = _make_tag(dt, 30, mio5p.miUINT16, 0)
+    a_str = a.tostring()
+    _write_stream(str_io, a_str)
+    el = c_reader.read_numeric()
+    assert_(el.flags.writeable is True)
+
+
+def test_zero_byte_string():
+    # Tests hack to allow chars of non-zero length, but 0 bytes
+    # make reader-like thing
+    str_io = cStringIO()
+    r = _make_readerlike(str_io, boc.native_code)
+    c_reader = m5u.VarReader5(r)
+    tag_dt = np.dtype([('mdtype', 'u4'), ('byte_count', 'u4')])
+    tag = np.zeros((1,), dtype=tag_dt)
+    tag['mdtype'] = mio5p.miINT8
+    tag['byte_count'] = 1
+    hdr = m5u.VarHeader5()
+    # Try when string is 1 length
+    hdr.set_dims([1,])
+    _write_stream(str_io, tag.tostring() + b'        ')
+    str_io.seek(0)
+    val = c_reader.read_char(hdr)
+    assert_equal(val, u(' '))
+    # Now when string has 0 bytes 1 length
+    tag['byte_count'] = 0
+    _write_stream(str_io, tag.tostring())
+    str_io.seek(0)
+    val = c_reader.read_char(hdr)
+    assert_equal(val, u(' '))
+    # Now when string has 0 bytes 4 length
+    str_io.seek(0)
+    hdr.set_dims([4,])
+    val = c_reader.read_char(hdr)
+    assert_array_equal(val, [u(' ')] * 4)
+
@@ -0,0 +1,57 @@
+''' Jottings to work out format for __function_workspace__ matrix at end
+of mat file.
+
+'''
+from __future__ import division, print_function, absolute_import
+
+import os.path
+import sys
+import io
+
+from numpy.compat import asstr
+
+from scipy.io.matlab.mio5 import (MatlabObject, MatFile5Writer,
+                                  MatFile5Reader, MatlabFunction)
+
+test_data_path = os.path.join(os.path.dirname(__file__), 'data')
+
+
+def read_minimat_vars(rdr):
+    rdr.initialize_read()
+    mdict = {'__globals__': []}
+    i = 0
+    while not rdr.end_of_stream():
+        hdr, next_position = rdr.read_var_header()
+        name = asstr(hdr.name)
+        if name == '':
+            name = 'var_%d' % i
+            i += 1
+        res = rdr.read_var_array(hdr, process=False)
+        rdr.mat_stream.seek(next_position)
+        mdict[name] = res
+        if hdr.is_global:
+            mdict['__globals__'].append(name)
+    return mdict
+
+
+def read_workspace_vars(fname):
+    fp = open(fname, 'rb')
+    rdr = MatFile5Reader(fp, struct_as_record=True)
+    vars = rdr.get_variables()
+    fws = vars['__function_workspace__']
+    ws_bs = io.BytesIO(fws.tostring())
+    ws_bs.seek(2)
+    rdr.mat_stream = ws_bs
+    # Guess byte order.
+    mi = rdr.mat_stream.read(2)
+    rdr.byte_order = mi == b'IM' and '<' or '>'
+    rdr.mat_stream.read(4)  # presumably byte padding
+    mdict = read_minimat_vars(rdr)
+    fp.close()
+    return mdict
+
+
+def test_jottings():
+    # example
+    fname = os.path.join(test_data_path, 'parabola.mat')
+    ws_vars = read_workspace_vars(fname)
@@ -0,0 +1,46 @@
+""" Testing
+
+"""
+
+from __future__ import division, print_function, absolute_import
+
+import numpy as np
+
+from numpy.testing import assert_array_equal, assert_array_almost_equal, \
+     assert_
+
+from scipy.io.matlab.mio_utils import squeeze_element, chars_to_strings
+
+
+def test_squeeze_element():
+    a = np.zeros((1,3))
+    assert_array_equal(np.squeeze(a), squeeze_element(a))
+    # 0d output from squeeze gives scalar
+    sq_int = squeeze_element(np.zeros((1,1), dtype=float))
+    assert_(isinstance(sq_int, float))
+    # Unless it's a structured array
+    sq_sa = squeeze_element(np.zeros((1,1),dtype=[('f1', 'f')]))
+    assert_(isinstance(sq_sa, np.ndarray))
+
+
+def test_chars_strings():
+    # chars as strings
+    strings = ['learn ', 'python', 'fast  ', 'here  ']
+    str_arr = np.array(strings, dtype='U6')  # shape (4,)
+    chars = [list(s) for s in strings]
+    char_arr = np.array(chars, dtype='U1')  # shape (4,6)
+    assert_array_equal(chars_to_strings(char_arr), str_arr)
+    ca2d = char_arr.reshape((2,2,6))
+    sa2d = str_arr.reshape((2,2))
+    assert_array_equal(chars_to_strings(ca2d), sa2d)
+    ca3d = char_arr.reshape((1,2,2,6))
+    sa3d = str_arr.reshape((1,2,2))
+    assert_array_equal(chars_to_strings(ca3d), sa3d)
+    # Fortran ordered arrays
+    char_arrf = np.array(chars, dtype='U1', order='F')  # shape (4,6)
+    assert_array_equal(chars_to_strings(char_arrf), str_arr)
+    # empty array
+    arr = np.array([['']], dtype='U1')
+    out_arr = np.array([''], dtype='U1')
+    assert_array_equal(chars_to_strings(arr), out_arr)
+
@@ -0,0 +1,31 @@
+""" Testing miobase module
+"""
+
+import numpy as np
+
+from numpy.testing import assert_equal
+from pytest import raises as assert_raises
+
+from scipy.io.matlab.miobase import matdims
+
+
+def test_matdims():
+    # Test matdims dimension finder
+    assert_equal(matdims(np.array(1)), (1, 1))  # numpy scalar
+    assert_equal(matdims(np.array([1])), (1, 1))  # 1d array, 1 element
+    assert_equal(matdims(np.array([1,2])), (2, 1))  # 1d array, 2 elements
+    assert_equal(matdims(np.array([[2],[3]])), (2, 1))  # 2d array, column vector
+    assert_equal(matdims(np.array([[2,3]])), (1, 2))  # 2d array, row vector
+    # 3d array, rowish vector
+    assert_equal(matdims(np.array([[[2,3]]])), (1, 1, 2))
+    assert_equal(matdims(np.array([])), (0, 0))  # empty 1d array
+    assert_equal(matdims(np.array([[]])), (0, 0))  # empty 2d
+    assert_equal(matdims(np.array([[[]]])), (0, 0, 0))  # empty 3d
+    # Optional argument flips 1-D shape behavior.
+    assert_equal(matdims(np.array([1,2]), 'row'), (1, 2))  # 1d array, 2 elements
+    # The argument has to make sense though
+    assert_raises(ValueError, matdims, np.array([1,2]), 'bizarre')
+    # Check empty sparse matrices get their own shape
+    from scipy.sparse import csr_matrix, csc_matrix
+    assert_equal(matdims(csr_matrix(np.zeros((3, 3)))), (3, 3))
+    assert_equal(matdims(csc_matrix(np.zeros((2, 2)))), (2, 2))
@@ -0,0 +1,35 @@
+""" Test reading of files not conforming to matlab specification
+
+We try and read any file that matlab reads, these files included
+"""
+from __future__ import division, print_function, absolute_import
+
+from os.path import dirname, join as pjoin
+
+from numpy.testing import assert_
+from pytest import raises as assert_raises
+
+from scipy.io.matlab.mio import loadmat
+
+TEST_DATA_PATH = pjoin(dirname(__file__), 'data')
+
+
+def test_multiple_fieldnames():
+    # Example provided by Dharhas Pothina
+    # Extracted using mio5.varmats_from_mat
+    multi_fname = pjoin(TEST_DATA_PATH, 'nasty_duplicate_fieldnames.mat')
+    vars = loadmat(multi_fname)
+    funny_names = vars['Summary'].dtype.names
+    assert_(set(['_1_Station_Q', '_2_Station_Q',
+                     '_3_Station_Q']).issubset(funny_names))
+
+
+def test_malformed1():
+    # Example from gh-6072
+    # Contains malformed header data, which previously resulted into a
+    # buffer overflow.
+    #
+    # Should raise an exception, not segfault
+    fname = pjoin(TEST_DATA_PATH, 'malformed1.mat')
+    with open(fname, 'rb') as f:
+        assert_raises(ValueError, loadmat, f)
@@ -0,0 +1,184 @@
+""" Testing
+
+"""
+
+from __future__ import division, print_function, absolute_import
+
+import os
+import sys
+import zlib
+
+from io import BytesIO
+
+if sys.version_info[0] >= 3:
+    cStringIO = BytesIO
+else:
+    from cStringIO import StringIO as cStringIO
+
+from tempfile import mkstemp
+from contextlib import contextmanager
+
+import numpy as np
+
+from numpy.testing import assert_, assert_equal
+from pytest import raises as assert_raises
+
+from scipy.io.matlab.streams import (make_stream,
+    GenericStream, cStringStream, FileStream, ZlibInputStream,
+    _read_into, _read_string)
+
+IS_PYPY = ('__pypy__' in sys.modules)
+
+
+@contextmanager
+def setup_test_file():
+    val = b'a\x00string'
+    fd, fname = mkstemp()
+
+    with os.fdopen(fd, 'wb') as fs:
+        fs.write(val)
+    with open(fname, 'rb') as fs:
+        gs = BytesIO(val)
+        cs = cStringIO(val)
+        yield fs, gs, cs
+    os.unlink(fname)
+
+
+def test_make_stream():
+    with setup_test_file() as (fs, gs, cs):
+        # test stream initialization
+        assert_(isinstance(make_stream(gs), GenericStream))
+        if sys.version_info[0] < 3 and not IS_PYPY:
+            assert_(isinstance(make_stream(cs), cStringStream))
+            assert_(isinstance(make_stream(fs), FileStream))
+
+
+def test_tell_seek():
+    with setup_test_file() as (fs, gs, cs):
+        for s in (fs, gs, cs):
+            st = make_stream(s)
+            res = st.seek(0)
+            assert_equal(res, 0)
+            assert_equal(st.tell(), 0)
+            res = st.seek(5)
+            assert_equal(res, 0)
+            assert_equal(st.tell(), 5)
+            res = st.seek(2, 1)
+            assert_equal(res, 0)
+            assert_equal(st.tell(), 7)
+            res = st.seek(-2, 2)
+            assert_equal(res, 0)
+            assert_equal(st.tell(), 6)
+
+
+def test_read():
+    with setup_test_file() as (fs, gs, cs):
+        for s in (fs, gs, cs):
+            st = make_stream(s)
+            st.seek(0)
+            res = st.read(-1)
+            assert_equal(res, b'a\x00string')
+            st.seek(0)
+            res = st.read(4)
+            assert_equal(res, b'a\x00st')
+            # read into
+            st.seek(0)
+            res = _read_into(st, 4)
+            assert_equal(res, b'a\x00st')
+            res = _read_into(st, 4)
+            assert_equal(res, b'ring')
+            assert_raises(IOError, _read_into, st, 2)
+            # read alloc
+            st.seek(0)
+            res = _read_string(st, 4)
+            assert_equal(res, b'a\x00st')
+            res = _read_string(st, 4)
+            assert_equal(res, b'ring')
+            assert_raises(IOError, _read_string, st, 2)
+
+
+class TestZlibInputStream(object):
+    def _get_data(self, size):
+        data = np.random.randint(0, 256, size).astype(np.uint8).tostring()
+        compressed_data = zlib.compress(data)
+        stream = BytesIO(compressed_data)
+        return stream, len(compressed_data), data
+
+    def test_read(self):
+        block_size = 131072
+
+        SIZES = [0, 1, 10, block_size//2, block_size-1,
+                 block_size, block_size+1, 2*block_size-1]
+
+        READ_SIZES = [block_size//2, block_size-1,
+                      block_size, block_size+1]
+
+        def check(size, read_size):
+            compressed_stream, compressed_data_len, data = self._get_data(size)
+            stream = ZlibInputStream(compressed_stream, compressed_data_len)
+            data2 = b''
+            so_far = 0
+            while True:
+                block = stream.read(min(read_size,
+                                        size - so_far))
+                if not block:
+                    break
+                so_far += len(block)
+                data2 += block
+            assert_equal(data, data2)
+
+        for size in SIZES:
+            for read_size in READ_SIZES:
+                check(size, read_size)
+
+    def test_read_max_length(self):
+        size = 1234
+        data = np.random.randint(0, 256, size).astype(np.uint8).tostring()
+        compressed_data = zlib.compress(data)
+        compressed_stream = BytesIO(compressed_data + b"abbacaca")
+        stream = ZlibInputStream(compressed_stream, len(compressed_data))
+
+        stream.read(len(data))
+        assert_equal(compressed_stream.tell(), len(compressed_data))
+
+        assert_raises(IOError, stream.read, 1)
+
+    def test_seek(self):
+        compressed_stream, compressed_data_len, data = self._get_data(1024)
+
+        stream = ZlibInputStream(compressed_stream, compressed_data_len)
+
+        stream.seek(123)
+        p = 123
+        assert_equal(stream.tell(), p)
+        d1 = stream.read(11)
+        assert_equal(d1, data[p:p+11])
+
+        stream.seek(321, 1)
+        p = 123+11+321
+        assert_equal(stream.tell(), p)
+        d2 = stream.read(21)
+        assert_equal(d2, data[p:p+21])
+
+        stream.seek(641, 0)
+        p = 641
+        assert_equal(stream.tell(), p)
+        d3 = stream.read(11)
+        assert_equal(d3, data[p:p+11])
+
+        assert_raises(IOError, stream.seek, 10, 2)
+        assert_raises(IOError, stream.seek, -1, 1)
+        assert_raises(ValueError, stream.seek, 1, 123)
+
+        stream.seek(10000, 1)
+        assert_raises(IOError, stream.read, 12)
+
+    def test_all_data_read(self):
+        compressed_stream, compressed_data_len, data = self._get_data(1024)
+        stream = ZlibInputStream(compressed_stream, compressed_data_len)
+        assert_(not stream.all_data_read())
+        stream.seek(512)
+        assert_(not stream.all_data_read())
+        stream.seek(1024)
+        assert_(stream.all_data_read())
+