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A start at adding a system test for tahoe_fuse. Incomplete...
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nejucomo
parent
2b9ba229be
commit
026f2d0df5
@ -6,11 +6,211 @@ Note: The API design of the python-fuse library makes unit testing much
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of tahoe-fuse.py tricky business.
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'''
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import unittest
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import sys, os, shutil, unittest, subprocess, tempfile, re
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import tahoe_fuse
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### Main flow control:
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def main(args = sys.argv[1:]):
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target = 'all'
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if args:
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if len(args) != 1:
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raise SystemExit(Usage)
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target = args[0]
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if target not in ('all', 'unit', 'system'):
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raise SystemExit(Usage)
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if target in ('all', 'unit'):
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run_unit_tests()
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if target in ('all', 'system'):
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run_system_test()
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def run_unit_tests():
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print 'Running Unit Tests.'
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try:
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unittest.main()
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except SystemExit, se:
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pass
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print 'Unit Tests complete.\n'
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def run_system_test():
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SystemTest().run()
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### System Testing:
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class SystemTest (object):
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def __init__(self):
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self.cliexec = None
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self.introbase = None
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self.clientbase = None
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## Top-level flow control:
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# These "*_layer" methods call eachother in a linear fashion, using
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# exception unwinding to do cleanup properly. Each "layer" invokes
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# a deeper layer, and each layer does its own cleanup upon exit.
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def run(self):
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print 'Running System Test.'
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try:
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self.init_cli_layer()
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except self.SetupFailure, sfail:
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print
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print sfail
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print 'System Test complete.'
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def init_cli_layer(self):
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'''This layer finds the appropriate tahoe executable.'''
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runtestpath = os.path.abspath(sys.argv[0])
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path = runtestpath
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for expectedname in ('runtests.py', 'fuse', 'contrib'):
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path, name = os.path.split(path)
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if name != expectedname:
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reason = 'Unexpected test script path: %r\n'
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reason += 'The system test script must be run from the source directory.'
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raise self.SetupFailure(reason, runtestpath)
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self.cliexec = os.path.join(path, 'bin', 'tahoe')
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version = self.run_tahoe('--version')
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print 'Using %r with version:\n%s' % (self.cliexec, version.rstrip())
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self.create_introducer_layer()
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def create_introducer_layer(self):
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print 'Creating introducer.'
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self.introbase = tempfile.mkdtemp(prefix='tahoe_fuse_test_',
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suffix='_introducer')
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try:
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output = self.run_tahoe('create-introducer', '--basedir', self.introbase)
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pat = r'^introducer created in (.*?)\n\s*$'
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self.check_tahoe_output(output, pat, self.introbase)
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self.launch_introducer_layer()
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finally:
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print 'Removing introducer directory.'
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try:
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shutil.rmtree(self.introbase)
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except Exception, e:
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print 'Exception removing test client directory: %r' % (self.introbase,)
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print 'Ignoring cleanup exception: %r' % (e,)
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def launch_introducer_layer(self):
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print 'Launching introducer.'
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# NOTE: We assume if tahoe exist with non-zero status, no separate
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# tahoe child process is still running.
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output = self.run_tahoe('start', '--basedir', self.introbase)
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try:
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pat = r'^STARTING (.*?)\nintroducer node probably started\s*$'
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self.check_tahoe_output(output, pat, self.introbase)
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self.create_client_layer()
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finally:
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print 'Stopping introducer node.'
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try:
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output = self.run_tahoe('stop', '--basedir', self.introbase)
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except Exception, e:
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print 'Failed to stop introducer node. Output:'
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print output
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print 'Ignoring cleanup exception: %r' % (e,)
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def create_client_layer(self):
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print 'Creating client.'
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self.clientbase = tempfile.mkdtemp(prefix='tahoe_fuse_test_',
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suffix='_client')
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try:
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output = self.run_tahoe('create-client', '--basedir', self.clientbase)
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pat = r'^client created in (.*?)\n'
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pat += r' please copy introducer.furl into the directory\s*$'
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self.check_tahoe_output(output, pat, self.clientbase)
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self.launch_client_layer()
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finally:
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print 'Removing client directory.'
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try:
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shutil.rmtree(self.clientbase)
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except Exception, e:
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print 'Exception removing test client directory: %r' % (self.clientbase,)
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print 'Ignoring cleanup exception: %r' % (e,)
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def launch_client_layer(self):
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print 'Launching client.'
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# NOTE: We assume if tahoe exist with non-zero status, no separate
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# tahoe child process is still running.
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output = self.run_tahoe('start', '--basedir', self.clientbase)
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try:
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pat = r'^STARTING (.*?)\nclient node probably started\s*$'
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self.check_tahoe_output(output, pat, self.clientbase)
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self.mount_fuse_layer()
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finally:
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print 'Stopping client node.'
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try:
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output = self.run_tahoe('stop', '--basedir', self.clientbase)
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except Exception, e:
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print 'Failed to stop client node. Output:'
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print output
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print 'Ignoring cleanup exception: %r' % (e,)
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def mount_fuse_layer(self):
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# XXX not implemented.
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pass
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# Utilities:
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def run_tahoe(self, *args):
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realargs = ('tahoe',) + args
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status, output = gather_output(realargs, executable=self.cliexec)
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if status != 0:
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tmpl = 'The tahoe cli exited with nonzero status.\n'
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tmpl += 'Executable: %r\n'
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tmpl += 'Command arguments: %r\n'
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tmpl += 'Exit status: %r\n'
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tmpl += 'Output:\n%s\n[End of tahoe output.]\n'
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raise self.SetupFailure(tmpl,
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self.cliexec,
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realargs,
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status,
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output)
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return output
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def check_tahoe_output(self, output, expected, expdir):
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m = re.match(expected, output, re.M)
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if m is None:
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tmpl = 'The output of tahoe did not match the expectation:\n'
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tmpl += 'Expected regex: %s\n'
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tmpl += 'Actual output: %r\n'
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raise self.SetupFailure(tmpl, expected, output)
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if expdir != m.group(1):
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tmpl = 'The output of tahoe refers to an unexpected directory:\n'
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tmpl += 'Expected directory: %r\n'
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tmpl += 'Actual directory: %r\n'
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raise self.SetupFailure(tmpl, expdir, m.group(1))
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# SystemTest Exceptions:
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class Failure (Exception):
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pass
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class SetupFailure (Failure):
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def __init__(self, tmpl, *args):
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msg = 'SystemTest.SetupFailure - A test environment could not be created:\n'
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msg += tmpl % args
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SystemTest.Failure.__init__(self, msg)
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### Unit Tests:
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class TestUtilFunctions (unittest.TestCase):
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'''Tests small stand-alone functions.'''
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def test_canonicalize_cap(self):
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@ -25,7 +225,30 @@ class TestUtilFunctions (unittest.TestCase):
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### Misc:
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def gather_output(*args, **kwargs):
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'''
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This expects the child does not require input and that it closes
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stdout/err eventually.
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'''
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p = subprocess.Popen(stdout = subprocess.PIPE,
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stderr = subprocess.STDOUT,
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*args,
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**kwargs)
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output = p.stdout.read()
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exitcode = p.wait()
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return (exitcode, output)
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Usage = '''
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Usage: %s [target]
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Run tests for the given target.
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target is one of: unit, system, or all
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''' % (sys.argv[0],)
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if __name__ == '__main__':
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unittest.main()
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main()
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