Python unittest.html() Examples

def testAssertMultiLineEqual(self):
        sample_text = b"""\
http://www.python.org/doc/2.3/lib/module-unittest.html
test case
    A test case is the smallest unit of testing. [...]
"""
        revised_sample_text = b"""\
http://www.python.org/doc/2.4.1/lib/module-unittest.html
test case
    A test case is the smallest unit of testing. [...] You may provide your
    own implementation that does not subclass from TestCase, of course.
"""
        sample_text_error = b"""\
- http://www.python.org/doc/2.3/lib/module-unittest.html
?                             ^
+ http://www.python.org/doc/2.4.1/lib/module-unittest.html
?                             ^^^
  test case
-     A test case is the smallest unit of testing. [...]
+     A test case is the smallest unit of testing. [...] You may provide your
?                                                       +++++++++++++++++++++
+     own implementation that does not subclass from TestCase, of course.
"""
        self.maxDiff = None
        for type_changer in (lambda x: x, lambda x: x.decode('utf8')):
            try:
                self.assertMultiLineEqual(type_changer(sample_text),
                                          type_changer(revised_sample_text))
            except self.failureException, e:
                # need to remove the first line of the error message
                error = str(e).encode('utf8').split('\n', 1)[1]

                # assertMultiLineEqual is hooked up as the default for
                # unicode strings - so we can't use it for this check
                self.assertTrue(sample_text_error == error) 

def testAssertMultiLineEqual(self):
        sample_text = b"""\
http://www.python.org/doc/2.3/lib/module-unittest.html
test case
    A test case is the smallest unit of testing. [...]
"""
        revised_sample_text = b"""\
http://www.python.org/doc/2.4.1/lib/module-unittest.html
test case
    A test case is the smallest unit of testing. [...] You may provide your
    own implementation that does not subclass from TestCase, of course.
"""
        sample_text_error = b"""\
- http://www.python.org/doc/2.3/lib/module-unittest.html
?                             ^
+ http://www.python.org/doc/2.4.1/lib/module-unittest.html
?                             ^^^
  test case
-     A test case is the smallest unit of testing. [...]
+     A test case is the smallest unit of testing. [...] You may provide your
?                                                       +++++++++++++++++++++
+     own implementation that does not subclass from TestCase, of course.
"""
        self.maxDiff = None
        for type_changer in (lambda x: x, lambda x: x.decode('utf8')):
            try:
                self.assertMultiLineEqual(type_changer(sample_text),
                                          type_changer(revised_sample_text))
            except self.failureException, e:
                # need to remove the first line of the error message
                error = str(e).encode('utf8').split('\n', 1)[1]

                # assertMultiLineEqual is hooked up as the default for
                # unicode strings - so we can't use it for this check
                self.assertTrue(sample_text_error == error) 

def testAssertMultiLineEqual(self):
        sample_text = """\
http://www.python.org/doc/2.3/lib/module-unittest.html
test case
    A test case is the smallest unit of testing. [...]
"""
        revised_sample_text = """\
http://www.python.org/doc/2.4.1/lib/module-unittest.html
test case
    A test case is the smallest unit of testing. [...] You may provide your
    own implementation that does not subclass from TestCase, of course.
"""
        sample_text_error = """\
- http://www.python.org/doc/2.3/lib/module-unittest.html
?                             ^
+ http://www.python.org/doc/2.4.1/lib/module-unittest.html
?                             ^^^
  test case
-     A test case is the smallest unit of testing. [...]
+     A test case is the smallest unit of testing. [...] You may provide your
?                                                       +++++++++++++++++++++
+     own implementation that does not subclass from TestCase, of course.
"""
        self.maxDiff = None
        try:
            self.assertMultiLineEqual(sample_text, revised_sample_text)
        except self.failureException as e:
            # need to remove the first line of the error message
            error = str(e).split('\n', 1)[1]
            self.assertEqual(sample_text_error, error) 

def _enhex(s):
    """Convert from binary string (bytes) to hex string (str)."""

    import binascii

    return bytestostr(binascii.hexlify(s))

# Copies of PngSuite test files taken
# from http://www.schaik.com/pngsuite/pngsuite_bas_png.html
# on 2009-02-19 by drj and converted to hex.
# Some of these are not actually in PngSuite (but maybe they should
# be?), they use the same naming scheme, but start with a capital
# letter. 

def mycallersname():
    """Returns the name of the caller of the caller of this function
    (hence the name of the caller of the function in which
    "mycallersname()" textually appears).  Returns None if this cannot
    be determined."""

    # http://docs.python.org/library/inspect.html#the-interpreter-stack
    import inspect

    frame = inspect.currentframe()
    if not frame:
        return None
    frame_,filename_,lineno_,funname,linelist_,listi_ = (
      inspect.getouterframes(frame)[2])
    return funname 

def interleave_planes(ipixels, apixels, ipsize, apsize):
    """
    Interleave (colour) planes, e.g. RGB + A = RGBA.

    Return an array of pixels consisting of the `ipsize` elements of data
    from each pixel in `ipixels` followed by the `apsize` elements of data
    from each pixel in `apixels`.  Conventionally `ipixels` and
    `apixels` are byte arrays so the sizes are bytes, but it actually
    works with any arrays of the same type.  The returned array is the
    same type as the input arrays which should be the same type as each other.
    """

    itotal = len(ipixels)
    atotal = len(apixels)
    newtotal = itotal + atotal
    newpsize = ipsize + apsize
    # Set up the output buffer
    # See http://www.python.org/doc/2.4.4/lib/module-array.html#l2h-1356
    out = array(ipixels.typecode)
    # It's annoying that there is no cheap way to set the array size :-(
    out.extend(ipixels)
    out.extend(apixels)
    # Interleave in the pixel data
    for i in range(ipsize):
        out[i:newtotal:newpsize] = ipixels[i:itotal:ipsize]
    for i in range(apsize):
        out[i+ipsize:newtotal:newpsize] = apixels[i:atotal:apsize]
    return out 

def group(s, n):
    # See
    # http://www.python.org/doc/2.6/library/functions.html#zip
    return list(zip(*[iter(s)]*n)) 

def testAssertMultiLineEqual(self):
        sample_text = b"""\
http://www.python.org/doc/2.3/lib/module-unittest.html
test case
    A test case is the smallest unit of testing. [...]
"""
        revised_sample_text = b"""\
http://www.python.org/doc/2.4.1/lib/module-unittest.html
test case
    A test case is the smallest unit of testing. [...] You may provide your
    own implementation that does not subclass from TestCase, of course.
"""
        sample_text_error = b"""\
- http://www.python.org/doc/2.3/lib/module-unittest.html
?                             ^
+ http://www.python.org/doc/2.4.1/lib/module-unittest.html
?                             ^^^
  test case
-     A test case is the smallest unit of testing. [...]
+     A test case is the smallest unit of testing. [...] You may provide your
?                                                       +++++++++++++++++++++
+     own implementation that does not subclass from TestCase, of course.
"""
        self.maxDiff = None
        for type_changer in (lambda x: x, lambda x: x.decode('utf8')):
            try:
                self.assertMultiLineEqual(type_changer(sample_text),
                                          type_changer(revised_sample_text))
            except self.failureException, e:
                # need to remove the first line of the error message
                error = str(e).encode('utf8').split('\n', 1)[1]

                # assertMultiLineEqual is hooked up as the default for
                # unicode strings - so we can't use it for this check
                self.assertTrue(sample_text_error == error) 

def testAssertMultiLineEqual(self):
        sample_text = """\
http://www.python.org/doc/2.3/lib/module-unittest.html
test case
    A test case is the smallest unit of testing. [...]
"""
        revised_sample_text = """\
http://www.python.org/doc/2.4.1/lib/module-unittest.html
test case
    A test case is the smallest unit of testing. [...] You may provide your
    own implementation that does not subclass from TestCase, of course.
"""
        sample_text_error = """\
- http://www.python.org/doc/2.3/lib/module-unittest.html
?                             ^
+ http://www.python.org/doc/2.4.1/lib/module-unittest.html
?                             ^^^
  test case
-     A test case is the smallest unit of testing. [...]
+     A test case is the smallest unit of testing. [...] You may provide your
?                                                       +++++++++++++++++++++
+     own implementation that does not subclass from TestCase, of course.
"""
        self.maxDiff = None
        try:
            self.assertMultiLineEqual(sample_text, revised_sample_text)
        except self.failureException as e:
            # need to remove the first line of the error message
            error = str(e).split('\n', 1)[1]
            self.assertEqual(sample_text_error, error) 

def testAssertMultiLineEqual(self):
        sample_text = """\
http://www.python.org/doc/2.3/lib/module-unittest.html
test case
    A test case is the smallest unit of testing. [...]
"""
        revised_sample_text = """\
http://www.python.org/doc/2.4.1/lib/module-unittest.html
test case
    A test case is the smallest unit of testing. [...] You may provide your
    own implementation that does not subclass from TestCase, of course.
"""
        sample_text_error = """\
- http://www.python.org/doc/2.3/lib/module-unittest.html
?                             ^
+ http://www.python.org/doc/2.4.1/lib/module-unittest.html
?                             ^^^
  test case
-     A test case is the smallest unit of testing. [...]
+     A test case is the smallest unit of testing. [...] You may provide your
?                                                       +++++++++++++++++++++
+     own implementation that does not subclass from TestCase, of course.
"""
        self.maxDiff = None
        try:
            self.assertMultiLineEqual(sample_text, revised_sample_text)
        except self.failureException as e:
            # need to remove the first line of the error message
            error = str(e).split('\n', 1)[1]
            self.assertEqual(sample_text_error, error) 

def testAssertMultiLineEqual(self):
        sample_text = b"""\
http://www.python.org/doc/2.3/lib/module-unittest.html
test case
    A test case is the smallest unit of testing. [...]
"""
        revised_sample_text = b"""\
http://www.python.org/doc/2.4.1/lib/module-unittest.html
test case
    A test case is the smallest unit of testing. [...] You may provide your
    own implementation that does not subclass from TestCase, of course.
"""
        sample_text_error = b"""\
- http://www.python.org/doc/2.3/lib/module-unittest.html
?                             ^
+ http://www.python.org/doc/2.4.1/lib/module-unittest.html
?                             ^^^
  test case
-     A test case is the smallest unit of testing. [...]
+     A test case is the smallest unit of testing. [...] You may provide your
?                                                       +++++++++++++++++++++
+     own implementation that does not subclass from TestCase, of course.
"""
        self.maxDiff = None
        for type_changer in (lambda x: x, lambda x: x.decode('utf8')):
            try:
                self.assertMultiLineEqual(type_changer(sample_text),
                                          type_changer(revised_sample_text))
            except self.failureException, e:
                # need to remove the first line of the error message
                error = str(e).encode('utf8').split('\n', 1)[1]

                # assertMultiLineEqual is hooked up as the default for
                # unicode strings - so we can't use it for this check
                self.assertTrue(sample_text_error == error) 

def testAssertMultiLineEqual(self):
    sample_text = """\
http://www.python.org/doc/2.3/lib/module-unittest.html
test case
    A test case is the smallest unit of testing. [...]
"""
    revised_sample_text = """\
http://www.python.org/doc/2.4.1/lib/module-unittest.html
test case
    A test case is the smallest unit of testing. [...] You may provide your
    own implementation that does not subclass from TestCase, of course.
"""
    sample_text_error = """
- http://www.python.org/doc/2.3/lib/module-unittest.html
?                             ^
+ http://www.python.org/doc/2.4.1/lib/module-unittest.html
?                             ^^^
  test case
-     A test case is the smallest unit of testing. [...]
+     A test case is the smallest unit of testing. [...] You may provide your
?                                                       +++++++++++++++++++++
+     own implementation that does not subclass from TestCase, of course.
"""

    for type1 in (str, unicode):
      for type2 in (str, unicode):
        self.assertRaisesWithLiteralMatch(AssertionError, sample_text_error,
                                          self.assertMultiLineEqual,
                                          type1(sample_text),
                                          type2(revised_sample_text))

    self.assertRaises(AssertionError, self.assertMultiLineEqual, (1, 2), 'str')
    self.assertRaises(AssertionError, self.assertMultiLineEqual, 'str', (1, 2)) 

def gen_header(testcases):
    header = f'''"""DO NOT MODIFY: Tests generated from `tests/` with {sys.argv[0]}"""
import unittest
from binascii import unhexlify
from manticore import ManticoreEVM, Plugin
from manticore.utils import config
'''

    if any("logs" in testcase for testcase in testcases.values()):
        body += """
import sha3
import rlp
from rlp.sedes import (
    CountableList,
    BigEndianInt,
    Binary,
)
class Log(rlp.Serializable):
    fields = [
        ('address', Binary.fixed_length(20, allow_empty=True)),
        ('topics', CountableList(BigEndianInt(32))),
        ('data', Binary())
    ]
"""

    header += """consts = config.get_group('core')
consts.mprocessing = consts.mprocessing.single
consts = config.get_group('evm')
consts.oog = 'pedantic'

class EVMTest(unittest.TestCase):
    # https://nose.readthedocs.io/en/latest/doc_tests/test_multiprocess/multiprocess.html#controlling-distribution
    _multiprocess_can_split_ = True
    # https://docs.python.org/3.7/library/unittest.html#unittest.TestCase.maxDiff
    maxDiff = None

"""
    return header 

def _dehex(s):
    """Liberally convert from hex string to binary string."""
    import re

    # Remove all non-hexadecimal digits
    s = re.sub(r'[^a-fA-F\d]', '', s)
    return s.decode('hex')

# Copies of PngSuite test files taken
# from http://www.schaik.com/pngsuite/pngsuite_bas_png.html
# on 2009-02-19 by drj and converted to hex.
# Some of these are not actually in PngSuite (but maybe they should
# be?), they use the same naming scheme, but start with a capital
# letter. 

def interleave_planes(ipixels, apixels, ipsize, apsize):
    """
    Interleave (colour) planes, e.g. RGB + A = RGBA.

    Return an array of pixels consisting of the `ipsize` elements of data
    from each pixel in `ipixels` followed by the `apsize` elements of data
    from each pixel in `apixels`.  Conventionally `ipixels` and
    `apixels` are byte arrays so the sizes are bytes, but it actually
    works with any arrays of the same type.  The returned array is the
    same type as the input arrays which should be the same type as each other.
    """

    itotal = len(ipixels)
    atotal = len(apixels)
    newtotal = itotal + atotal
    newpsize = ipsize + apsize
    # Set up the output buffer
    # See http://www.python.org/doc/2.4.4/lib/module-array.html#l2h-1356
    out = array(ipixels.typecode)
    # It's annoying that there is no cheap way to set the array size :-(
    out.extend(ipixels)
    out.extend(apixels)
    # Interleave in the pixel data
    for i in range(ipsize):
        out[i:newtotal:newpsize] = ipixels[i:itotal:ipsize]
    for i in range(apsize):
        out[i + ipsize:newtotal:newpsize] = apixels[i:atotal:apsize]
    return out 

def group(s, n):
    # See
    # http://www.python.org/doc/2.6/library/functions.html#zip
    return zip(*[iter(s)] * n) 

def mycallersname():
    """Returns the name of the caller of the caller of this function
    (hence the name of the caller of the function in which
    "mycallersname()" textually appears).  Returns None if this cannot
    be determined."""

    # http://docs.python.org/library/inspect.html#the-interpreter-stack
    import inspect

    frame = inspect.currentframe()
    if not frame:
        return None
    frame_,filename_,lineno_,funname,linelist_,listi_ = (
      inspect.getouterframes(frame)[2])
    return funname 

def testAssertMultiLineEqual(self):
        sample_text = """\
http://www.python.org/doc/2.3/lib/module-unittest.html
test case
    A test case is the smallest unit of testing. [...]
"""
        revised_sample_text = """\
http://www.python.org/doc/2.4.1/lib/module-unittest.html
test case
    A test case is the smallest unit of testing. [...] You may provide your
    own implementation that does not subclass from TestCase, of course.
"""
        sample_text_error = """\
- http://www.python.org/doc/2.3/lib/module-unittest.html
?                             ^
+ http://www.python.org/doc/2.4.1/lib/module-unittest.html
?                             ^^^
  test case
-     A test case is the smallest unit of testing. [...]
+     A test case is the smallest unit of testing. [...] You may provide your
?                                                       +++++++++++++++++++++
+     own implementation that does not subclass from TestCase, of course.
"""
        self.maxDiff = None
        try:
            self.assertMultiLineEqual(sample_text, revised_sample_text)
        except self.failureException as e:
            # need to remove the first line of the error message
            error = str(e).split('\n', 1)[1]

            # no fair testing ourself with ourself, and assertEqual is used for strings
            # so can't use assertEqual either. Just use assertTrue.
            self.assertTrue(sample_text_error == error) 

def testAssertMultiLineEqual(self):
        sample_text = b"""\
http://www.python.org/doc/2.3/lib/module-unittest.html
test case
    A test case is the smallest unit of testing. [...]
"""
        revised_sample_text = b"""\
http://www.python.org/doc/2.4.1/lib/module-unittest.html
test case
    A test case is the smallest unit of testing. [...] You may provide your
    own implementation that does not subclass from TestCase, of course.
"""
        sample_text_error = b"""\
- http://www.python.org/doc/2.3/lib/module-unittest.html
?                             ^
+ http://www.python.org/doc/2.4.1/lib/module-unittest.html
?                             ^^^
  test case
-     A test case is the smallest unit of testing. [...]
+     A test case is the smallest unit of testing. [...] You may provide your
?                                                       +++++++++++++++++++++
+     own implementation that does not subclass from TestCase, of course.
"""
        self.maxDiff = None
        for type_changer in (lambda x: x, lambda x: x.decode('utf8')):
            try:
                self.assertMultiLineEqual(type_changer(sample_text),
                                          type_changer(revised_sample_text))
            except self.failureException, e:
                # need to remove the first line of the error message
                error = str(e).encode('utf8').split('\n', 1)[1]

                # assertMultiLineEqual is hooked up as the default for
                # unicode strings - so we can't use it for this check
                self.assertTrue(sample_text_error == error) 

def testAssertMultiLineEqual(self):
        sample_text = b"""\
http://www.python.org/doc/2.3/lib/module-unittest.html
test case
    A test case is the smallest unit of testing. [...]
"""
        revised_sample_text = b"""\
http://www.python.org/doc/2.4.1/lib/module-unittest.html
test case
    A test case is the smallest unit of testing. [...] You may provide your
    own implementation that does not subclass from TestCase, of course.
"""
        sample_text_error = b"""\
- http://www.python.org/doc/2.3/lib/module-unittest.html
?                             ^
+ http://www.python.org/doc/2.4.1/lib/module-unittest.html
?                             ^^^
  test case
-     A test case is the smallest unit of testing. [...]
+     A test case is the smallest unit of testing. [...] You may provide your
?                                                       +++++++++++++++++++++
+     own implementation that does not subclass from TestCase, of course.
"""
        self.maxDiff = None
        for type_changer in (lambda x: x, lambda x: x.decode('utf8')):
            try:
                self.assertMultiLineEqual(type_changer(sample_text),
                                          type_changer(revised_sample_text))
            except self.failureException, e:
                # need to remove the first line of the error message
                error = str(e).encode('utf8').split('\n', 1)[1]

                # assertMultiLineEqual is hooked up as the default for
                # unicode strings - so we can't use it for this check
                self.assertTrue(sample_text_error == error) 

def tearDownClass(cls):

    # tearDownModule() is called after all the tests have run.
    # http://docs.python.org/2/library/unittest.html#class-and-module-fixtures

    # Remove the temporary repository directory, which should contain all the
    # metadata, targets, and key files generated for the test cases.
    shutil.rmtree(cls.temporary_directory) 

def testAssertMultiLineEqual(self):
        sample_text = """\
http://www.python.org/doc/2.3/lib/module-unittest.html
test case
    A test case is the smallest unit of testing. [...]
"""
        revised_sample_text = """\
http://www.python.org/doc/2.4.1/lib/module-unittest.html
test case
    A test case is the smallest unit of testing. [...] You may provide your
    own implementation that does not subclass from TestCase, of course.
"""
        sample_text_error = """\
- http://www.python.org/doc/2.3/lib/module-unittest.html
?                             ^
+ http://www.python.org/doc/2.4.1/lib/module-unittest.html
?                             ^^^
  test case
-     A test case is the smallest unit of testing. [...]
+     A test case is the smallest unit of testing. [...] You may provide your
?                                                       +++++++++++++++++++++
+     own implementation that does not subclass from TestCase, of course.
"""
        self.maxDiff = None
        try:
            self.assertMultiLineEqual(sample_text, revised_sample_text)
        except self.failureException as e:
            # need to remove the first line of the error message
            error = str(e).split('\n', 1)[1]
            self.assertEqual(sample_text_error, error) 

def testAssertMultiLineEqual(self):
        sample_text = """\
http://www.python.org/doc/2.3/lib/module-unittest.html
test case
    A test case is the smallest unit of testing. [...]
"""
        revised_sample_text = """\
http://www.python.org/doc/2.4.1/lib/module-unittest.html
test case
    A test case is the smallest unit of testing. [...] You may provide your
    own implementation that does not subclass from TestCase, of course.
"""
        sample_text_error = """\
- http://www.python.org/doc/2.3/lib/module-unittest.html
?                             ^
+ http://www.python.org/doc/2.4.1/lib/module-unittest.html
?                             ^^^
  test case
-     A test case is the smallest unit of testing. [...]
+     A test case is the smallest unit of testing. [...] You may provide your
?                                                       +++++++++++++++++++++
+     own implementation that does not subclass from TestCase, of course.
"""
        self.maxDiff = None
        try:
            self.assertMultiLineEqual(sample_text, revised_sample_text)
        except self.failureException as e:
            # need to remove the first line of the error message
            error = str(e).split('\n', 1)[1]
            self.assertEqual(sample_text_error, error) 

def group(s, n):
    # See
    # http://www.python.org/doc/2.6/library/functions.html#zip
    return zip(*[iter(s)]*n) 

def interleave_planes(ipixels, apixels, ipsize, apsize):
    """
    Interleave (colour) planes, e.g. RGB + A = RGBA.

    Return an array of pixels consisting of the `ipsize` elements of data
    from each pixel in `ipixels` followed by the `apsize` elements of data
    from each pixel in `apixels`.  Conventionally `ipixels` and
    `apixels` are byte arrays so the sizes are bytes, but it actually
    works with any arrays of the same type.  The returned array is the
    same type as the input arrays which should be the same type as each other.
    """

    itotal = len(ipixels)
    atotal = len(apixels)
    newtotal = itotal + atotal
    newpsize = ipsize + apsize
    # Set up the output buffer
    # See http://www.python.org/doc/2.4.4/lib/module-array.html#l2h-1356
    out = array(ipixels.typecode)
    # It's annoying that there is no cheap way to set the array size :-(
    out.extend(ipixels)
    out.extend(apixels)
    # Interleave in the pixel data
    for i in range(ipsize):
        out[i:newtotal:newpsize] = ipixels[i:itotal:ipsize]
    for i in range(apsize):
        out[i+ipsize:newtotal:newpsize] = apixels[i:atotal:apsize]
    return out 

def _enhex(s):
    """Convert from binary string (bytes) to hex string (str)."""

    import binascii

    return bytestostr(binascii.hexlify(s))

# Copies of PngSuite test files taken
# from http://www.schaik.com/pngsuite/pngsuite_bas_png.html
# on 2009-02-19 by drj and converted to hex.
# Some of these are not actually in PngSuite (but maybe they should
# be?), they use the same naming scheme, but start with a capital
# letter. 

def _enhex(s):
    """Convert from binary string (bytes) to hex string (str)."""

    import binascii

    return bytestostr(binascii.hexlify(s))

# Copies of PngSuite test files taken
# from http://www.schaik.com/pngsuite/pngsuite_bas_png.html
# on 2009-02-19 by drj and converted to hex.
# Some of these are not actually in PngSuite (but maybe they should
# be?), they use the same naming scheme, but start with a capital
# letter. 

def testAssertMultiLineEqual(self):
        sample_text = """\
http://www.python.org/doc/2.3/lib/module-unittest.html
test case
    A test case is the smallest unit of testing. [...]
"""
        revised_sample_text = """\
http://www.python.org/doc/2.4.1/lib/module-unittest.html
test case
    A test case is the smallest unit of testing. [...] You may provide your
    own implementation that does not subclass from TestCase, of course.
"""
        sample_text_error = """\
- http://www.python.org/doc/2.3/lib/module-unittest.html
?                             ^
+ http://www.python.org/doc/2.4.1/lib/module-unittest.html
?                             ^^^
  test case
-     A test case is the smallest unit of testing. [...]
+     A test case is the smallest unit of testing. [...] You may provide your
?                                                       +++++++++++++++++++++
+     own implementation that does not subclass from TestCase, of course.
"""
        self.maxDiff = None
        try:
            self.assertMultiLineEqual(sample_text, revised_sample_text)
        except self.failureException as e:
            # need to remove the first line of the error message
            error = str(e).split('\n', 1)[1]

            # no fair testing ourself with ourself, and assertEqual is used for strings
            # so can't use assertEqual either. Just use assertTrue.
            self.assertTrue(sample_text_error == error) 

def group(s, n):
    # See
    # http://www.python.org/doc/2.6/library/functions.html#zip
    return list(zip(*[iter(s)]*n)) 

def interleave_planes(ipixels, apixels, ipsize, apsize):
    """
    Interleave (colour) planes, e.g. RGB + A = RGBA.

    Return an array of pixels consisting of the `ipsize` elements of data
    from each pixel in `ipixels` followed by the `apsize` elements of data
    from each pixel in `apixels`.  Conventionally `ipixels` and
    `apixels` are byte arrays so the sizes are bytes, but it actually
    works with any arrays of the same type.  The returned array is the
    same type as the input arrays which should be the same type as each other.
    """

    itotal = len(ipixels)
    atotal = len(apixels)
    newtotal = itotal + atotal
    newpsize = ipsize + apsize
    # Set up the output buffer
    # See http://www.python.org/doc/2.4.4/lib/module-array.html#l2h-1356
    out = array(ipixels.typecode)
    # It's annoying that there is no cheap way to set the array size :-(
    out.extend(ipixels)
    out.extend(apixels)
    # Interleave in the pixel data
    for i in range(ipsize):
        out[i:newtotal:newpsize] = ipixels[i:itotal:ipsize]
    for i in range(apsize):
        out[i+ipsize:newtotal:newpsize] = apixels[i:atotal:apsize]
    return out