WIP-pyshapelib-bramz/test/support.py

# Copyright (c) 2002, 2003 by Intevation GmbH
# Authors:
# Bernhard Herzog <[email protected]>
#
# This program is free software under the GPL (>=v2)
# Read the file COPYING coming with Thuban for details.

"""
Support classes and function for the test suite
"""

__version__ = "$Revision$"
# $Source$
# $Id$

import os, sys
import unittest

def thuban_dir():
    """Return the directory containing the Thuban package"""
    thisdir = os.path.dirname(__file__)
    return os.path.join(thisdir, os.pardir)

def resource_dir():
    return os.path.join(thuban_dir(), "Resources")

def add_thuban_dir_to_path():
    """Insert the Thuban directory at the beginning of the python path.

    If it's already part of the path, remove later occurrences.
    """
    dir = thuban_dir()
    while 1:
        try:
            sys.path.remove(dir)
        except ValueError:
            break
    sys.path.insert(0, dir)


_initthuban_done = 0
def initthuban():
    """Initialize the interpreter for using Thuban modules
    """
    global _initthuban_done
    if not _initthuban_done:
        add_thuban_dir_to_path()
        import thubaninit
        _initthuban_done = 1


#
# Special test runner and result that support skipping tests
#

class SkipTest(Exception):
    """Exception to raise in tests that are skipped for some reason

    For instance, since gdal support is optional, test cases that
    require gdal raise this exception to indicate that they are skipped.
    Skipped is different from failure or error in that it is expected
    under certain circumstances.
    """

class ThubanTestResult(unittest._TextTestResult):

    def __init__(self, stream, descriptions, verbosity):
        unittest._TextTestResult.__init__(self, stream, descriptions,
                                          verbosity)
        self.skipped_tests = {}

    def add_skipped_test(self, test, exc):
        reason = str(exc)
        self.skipped_tests.setdefault(reason, []).append(test)

    def count_skipped(self):
        sum = 0
        for tests in self.skipped_tests.values():
            sum += len(tests)
        return sum

    def addError(self, test, err):
        """Extend inherited method to handle SkipTest exceptions specially
        """
        #print "addError", test, err
        if isinstance(err[1], SkipTest):
            self.add_skipped_test(test, err[1])
            if self.showAll:
                self.stream.writeln("skipped")
            elif self.dots:
                self.stream.write('S')
        else:
            unittest._TextTestResult.addError(self, test, err)

    def printErrors(self):
        if self.skipped_tests:
            if self.dots or self.showAll:
                self.stream.writeln()
            self.stream.writeln("Skipped tests:")
            for reason, tests in self.skipped_tests.items():
                self.stream.writeln("%s:" % reason)
                for test in tests:
                    self.stream.writeln("    " + test.id())
        unittest._TextTestResult.printErrors(self)


class ThubanTestRunner(unittest.TextTestRunner):

    def _makeResult(self):
        return ThubanTestResult(self.stream, self.descriptions, self.verbosity)

    def run(self, test):
        result = unittest.TextTestRunner.run(self, test)
        self.stream.writeln("skipped = %d" % result.count_skipped())
        return result


class ThubanTestProgram(unittest.TestProgram):

    def runTests(self):
        """Extend inherited method so that we use a ThubanTestRunner"""
        print "ThubanTestProgram.runTests"
        self.testRunner = ThubanTestRunner(verbosity = self.verbosity)
        unittest.TestProgram.runTests(self)


def run_tests():
    """Frontend for unittest.main that prints some additional debug information

    After calling unittest.main, run the garbage collector and print
    uncollected objects. Also print any un-unsubscribed messages.
    """
    try:
        ThubanTestProgram()
    finally:
        # This has to be in a finally clause because unittest.main()
        # ends with a sys.exit to make sure that the process exits with
        # an appropriate exit code
        print_additional_summary()

def print_additional_summary():
    """Print some additional summary information after tests have been run"""
    print_garbage_information()
    import xmlsupport
    xmlsupport.print_summary_message()

def print_garbage_information():
    """Print information about things that haven't been cleaned up.

    Run the garbage collector and print uncollected objects. Also print
    any un-unsubscribed messages.
    """
    import gc, Thuban.Lib.connector
    gc.collect()
    if gc.garbage:
        print
        print "There are %d uncollected objects:" % len(gc.garbage)
        print gc.garbage
    Thuban.Lib.connector._the_connector.print_connections()

#

def create_temp_dir():
    """Create a temporary directory and return its name.

    The temporary directory is always called temp and is created in the
    directory where support module is located.

    If the temp directory already exists, just return the name.
    """
    name = os.path.abspath(os.path.join(os.path.dirname(__file__), "temp"))

    # if the directory already exists, we're done
    if os.path.isdir(name):
        return name

    # create the directory
    os.mkdir(name)
    return name


class FileTestMixin:

    """Mixin class for tests that use files in the temporary directory
    """

    def temp_file_name(self, basename):
        """Return the full name of the file named basename in the temp. dir"""
        return os.path.join(create_temp_dir(), basename)

    def temp_dir(self):
        """Return the name of the directory for the temporary files"""
        return create_temp_dir()


class FileLoadTestCase(unittest.TestCase, FileTestMixin):

    """Base class for test case that test loading files.

    This base class provides some common infrastructure for testing the
    reading of files.

    Each test case should be its own class derived from this one. There
    is one file associated with each class. The contents are defined by
    the file_contents class attribute and its name by the filename
    method.

    Derived classes usually only have to provide appropriate values for
    the file_contents and file_extension class attributes.
    """

    file_contents = None
    file_extension = ""

    def filename(self):
        """Return the name of the test file to use.

        The default implementation simply calls self.volatile_file_name
        with a basename derived from the class name by stripping off a
        leading 'test_' and appending self.file_extension.
        """
        name = self.__class__.__name__
        if name.startswith("test_"):
            name = name[5:]
        return self.temp_file_name(name + self.file_extension)

    def setUp(self):
        """Create the volatile file for the test.

        Write self.contents (which should be a string) to the file named
        by self.filename().
        """
        filename = self.filename()
        file = open(filename, "w")
        file.write(self.file_contents)
        file.close()


class FloatComparisonMixin:

    """
    Mixin class for tests comparing floating point numbers.

    This class provides a few methods for testing floating point
    operations.
    """

    fp_epsilon = 1e-6
    fp_inf = float('1e1000')   # FIXME: hack for infinite
    
    def assertFloatEqual(self, test, value, epsilon = None):
        """Assert equality of test and value with some tolerance.

        Assert that the absolute difference between test and value is
        less than self.fp_epsilon.
        """
        if epsilon is None:
            epsilon = self.fp_epsilon
        if abs(test) == self.fp_inf:
            self.assertEqual(test, value)
        else:
            self.assert_(epsilon > abs(test - value),
                     "abs(%g - %g) >= %g" % (test, value, epsilon))

    def assertFloatSeqEqual(self, test, value, epsilon = None):
        """Assert equality of the sequences test and value with some tolerance.

        Assert that the absolute difference between each corresponding
        value in test and value is less than the optional parameter
        epsilon. If epsilon is not given use self.fp_epsilon.
        """
        for i in range(len(test)):
            self.assertFloatEqual(test[i], value[i], epsilon)

class SubscriberMixin:

    """Mixin class for tests for messages sent through the Connector

    The SubscriberMixin has some methods that can be used as subscribers
    of events that when called append information about the message into
    a list of messages received.

    A derived class should call the clear_messages() method in both its
    setUp and tearDown methods to clear the list of messages received.
    """

    def clear_messages(self):
        """Clear the list of received messages.

        Call this at least in the tests setUp and tearDown methods. It's
        important to do it in tearDown too because otherwise there may
        be cyclic references.
        """
        self.received_messages = []

    def subscribe_no_params(self):
        """Method for subscriptions without parameters.

        Add an empty tuple to the list of received messages.
        """
        self.received_messages.append(())

    def subscribe_with_params(self, *args):
        """Method for subscriptions with parameters.

        Append the tuple will all arguments to this function (except for
        the self argument) to the list of received messages.
        """
        self.received_messages.append(args)

    def check_messages(self, messages):
        """Check whether the messages received match the list messages"""
        self.assertEquals(messages, self.received_messages)

1	# Copyright (c) 2002, 2003 by Intevation GmbH
2	# Authors:
3	# Bernhard Herzog <[email protected]>
4	#
5	# This program is free software under the GPL (>=v2)
6	# Read the file COPYING coming with Thuban for details.
7
8	"""
9	Support classes and function for the test suite
10	"""
11
12	__version__ = "$Revision$"
13	# $Source$
14	# $Id$
15
16	import os, sys
17	import unittest
18
19	def thuban_dir():
20	"""Return the directory containing the Thuban package"""
21	thisdir = os.path.dirname(__file__)
22	return os.path.join(thisdir, os.pardir)
23
24	def resource_dir():
25	return os.path.join(thuban_dir(), "Resources")
26
27	def add_thuban_dir_to_path():
28	"""Insert the Thuban directory at the beginning of the python path.
29
30	If it's already part of the path, remove later occurrences.
31	"""
32	dir = thuban_dir()
33	while 1:
34	try:
35	sys.path.remove(dir)
36	except ValueError:
37	break
38	sys.path.insert(0, dir)
39
40
41	_initthuban_done = 0
42	def initthuban():
43	"""Initialize the interpreter for using Thuban modules
44	"""
45	global _initthuban_done
46	if not _initthuban_done:
47	add_thuban_dir_to_path()
48	import thubaninit
49	_initthuban_done = 1
50
51
52	#
53	# Special test runner and result that support skipping tests
54	#
55
56	class SkipTest(Exception):
57	"""Exception to raise in tests that are skipped for some reason
58
59	For instance, since gdal support is optional, test cases that
60	require gdal raise this exception to indicate that they are skipped.
61	Skipped is different from failure or error in that it is expected
62	under certain circumstances.
63	"""
64
65	class ThubanTestResult(unittest._TextTestResult):
66
67	def __init__(self, stream, descriptions, verbosity):
68	unittest._TextTestResult.__init__(self, stream, descriptions,
69	verbosity)
70	self.skipped_tests = {}
71
72	def add_skipped_test(self, test, exc):
73	reason = str(exc)
74	self.skipped_tests.setdefault(reason, []).append(test)
75
76	def count_skipped(self):
77	sum = 0
78	for tests in self.skipped_tests.values():
79	sum += len(tests)
80	return sum
81
82	def addError(self, test, err):
83	"""Extend inherited method to handle SkipTest exceptions specially
84	"""
85	#print "addError", test, err
86	if isinstance(err[1], SkipTest):
87	self.add_skipped_test(test, err[1])
88	if self.showAll:
89	self.stream.writeln("skipped")
90	elif self.dots:
91	self.stream.write('S')
92	else:
93	unittest._TextTestResult.addError(self, test, err)
94
95	def printErrors(self):
96	if self.skipped_tests:
97	if self.dots or self.showAll:
98	self.stream.writeln()
99	self.stream.writeln("Skipped tests:")
100	for reason, tests in self.skipped_tests.items():
101	self.stream.writeln("%s:" % reason)
102	for test in tests:
103	self.stream.writeln(" " + test.id())
104	unittest._TextTestResult.printErrors(self)
105
106
107	class ThubanTestRunner(unittest.TextTestRunner):
108
109	def _makeResult(self):
110	return ThubanTestResult(self.stream, self.descriptions, self.verbosity)
111
112	def run(self, test):
113	result = unittest.TextTestRunner.run(self, test)
114	self.stream.writeln("skipped = %d" % result.count_skipped())
115	return result
116
117
118	class ThubanTestProgram(unittest.TestProgram):
119
120	def runTests(self):
121	"""Extend inherited method so that we use a ThubanTestRunner"""
122	print "ThubanTestProgram.runTests"
123	self.testRunner = ThubanTestRunner(verbosity = self.verbosity)
124	unittest.TestProgram.runTests(self)
125
126
127	def run_tests():
128	"""Frontend for unittest.main that prints some additional debug information
129
130	After calling unittest.main, run the garbage collector and print
131	uncollected objects. Also print any un-unsubscribed messages.
132	"""
133	try:
134	ThubanTestProgram()
135	finally:
136	# This has to be in a finally clause because unittest.main()
137	# ends with a sys.exit to make sure that the process exits with
138	# an appropriate exit code
139	print_additional_summary()
140
141	def print_additional_summary():
142	"""Print some additional summary information after tests have been run"""
143	print_garbage_information()
144	import xmlsupport
145	xmlsupport.print_summary_message()
146
147	def print_garbage_information():
148	"""Print information about things that haven't been cleaned up.
149
150	Run the garbage collector and print uncollected objects. Also print
151	any un-unsubscribed messages.
152	"""
153	import gc, Thuban.Lib.connector
154	gc.collect()
155	if gc.garbage:
156	print
157	print "There are %d uncollected objects:" % len(gc.garbage)
158	print gc.garbage
159	Thuban.Lib.connector._the_connector.print_connections()
160
161	#
162
163	def create_temp_dir():
164	"""Create a temporary directory and return its name.
165
166	The temporary directory is always called temp and is created in the
167	directory where support module is located.
168
169	If the temp directory already exists, just return the name.
170	"""
171	name = os.path.abspath(os.path.join(os.path.dirname(__file__), "temp"))
172
173	# if the directory already exists, we're done
174	if os.path.isdir(name):
175	return name
176
177	# create the directory
178	os.mkdir(name)
179	return name
180
181
182	class FileTestMixin:
183
184	"""Mixin class for tests that use files in the temporary directory
185	"""
186
187	def temp_file_name(self, basename):
188	"""Return the full name of the file named basename in the temp. dir"""
189	return os.path.join(create_temp_dir(), basename)
190
191	def temp_dir(self):
192	"""Return the name of the directory for the temporary files"""
193	return create_temp_dir()
194
195
196
197	class FileLoadTestCase(unittest.TestCase, FileTestMixin):
198
199	"""Base class for test case that test loading files.
200
201	This base class provides some common infrastructure for testing the
202	reading of files.
203
204	Each test case should be its own class derived from this one. There
205	is one file associated with each class. The contents are defined by
206	the file_contents class attribute and its name by the filename
207	method.
208
209	Derived classes usually only have to provide appropriate values for
210	the file_contents and file_extension class attributes.
211	"""
212
213	file_contents = None
214	file_extension = ""
215
216	def filename(self):
217	"""Return the name of the test file to use.
218
219	The default implementation simply calls self.volatile_file_name
220	with a basename derived from the class name by stripping off a
221	leading 'test_' and appending self.file_extension.
222	"""
223	name = self.__class__.__name__
224	if name.startswith("test_"):
225	name = name[5:]
226	return self.temp_file_name(name + self.file_extension)
227
228	def setUp(self):
229	"""Create the volatile file for the test.
230
231	Write self.contents (which should be a string) to the file named
232	by self.filename().
233	"""
234	filename = self.filename()
235	file = open(filename, "w")
236	file.write(self.file_contents)
237	file.close()
238
239
240	class FloatComparisonMixin:
241
242	"""
243	Mixin class for tests comparing floating point numbers.
244
245	This class provides a few methods for testing floating point
246	operations.
247	"""
248
249	fp_epsilon = 1e-6
250	fp_inf = float('1e1000') # FIXME: hack for infinite
251
252	def assertFloatEqual(self, test, value, epsilon = None):
253	"""Assert equality of test and value with some tolerance.
254
255	Assert that the absolute difference between test and value is
256	less than self.fp_epsilon.
257	"""
258	if epsilon is None:
259	epsilon = self.fp_epsilon
260	if abs(test) == self.fp_inf:
261	self.assertEqual(test, value)
262	else:
263	self.assert_(epsilon > abs(test - value),
264	"abs(%g - %g) >= %g" % (test, value, epsilon))
265
266	def assertFloatSeqEqual(self, test, value, epsilon = None):
267	"""Assert equality of the sequences test and value with some tolerance.
268
269	Assert that the absolute difference between each corresponding
270	value in test and value is less than the optional parameter
271	epsilon. If epsilon is not given use self.fp_epsilon.
272	"""
273	for i in range(len(test)):
274	self.assertFloatEqual(test[i], value[i], epsilon)
275
276	class SubscriberMixin:
277
278	"""Mixin class for tests for messages sent through the Connector
279
280	The SubscriberMixin has some methods that can be used as subscribers
281	of events that when called append information about the message into
282	a list of messages received.
283
284	A derived class should call the clear_messages() method in both its
285	setUp and tearDown methods to clear the list of messages received.
286	"""
287
288	def clear_messages(self):
289	"""Clear the list of received messages.
290
291	Call this at least in the tests setUp and tearDown methods. It's
292	important to do it in tearDown too because otherwise there may
293	be cyclic references.
294	"""
295	self.received_messages = []
296
297	def subscribe_no_params(self):
298	"""Method for subscriptions without parameters.
299
300	Add an empty tuple to the list of received messages.
301	"""
302	self.received_messages.append(())
303
304	def subscribe_with_params(self, *args):
305	"""Method for subscriptions with parameters.
306
307	Append the tuple will all arguments to this function (except for
308	the self argument) to the list of received messages.
309	"""
310	self.received_messages.append(args)
311
312	def check_messages(self, messages):
313	"""Check whether the messages received match the list messages"""
314	self.assertEquals(messages, self.received_messages)
315
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