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#!/usr/bin/python
# Copyright (c) 2012 The Native Client Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
"""Tests of a network memoizer."""
import os
import subprocess
import shutil
import sys
import unittest
sys.path.append(os.path.join(os.path.dirname(__file__), '..'))
import pynacl.directory_storage
import pynacl.fake_storage
import pynacl.file_tools
import pynacl.gsd_storage
import pynacl.working_directory
import command
import once
class TestOnce(unittest.TestCase):
def GenerateTestData(self, noise, work_dir):
self._input_dirs = {}
self._input_files = []
for i in range(2):
dir_name = os.path.join(work_dir, noise + 'input%d_dir' % i)
os.mkdir(dir_name)
filename = os.path.join(dir_name, 'in%d' % i)
pynacl.file_tools.WriteFile(noise + 'data%d' % i, filename)
self._input_dirs['input%d' % i] = dir_name
self._input_files.append(filename)
self._output_dirs = []
self._output_files = []
for i in range(2):
dir_name = os.path.join(work_dir, noise + 'output%d_dir' % i)
os.mkdir(dir_name)
filename = os.path.join(dir_name, 'out')
self._output_dirs.append(dir_name)
self._output_files.append(filename)
def test_FirstTime(self):
# Test that the computation is always performed if the cache is empty.
with pynacl.working_directory.TemporaryWorkingDirectory() as work_dir:
self.GenerateTestData('FirstTime', work_dir)
o = once.Once(storage=pynacl.fake_storage.FakeStorage(),
system_summary='test')
o.Run('test', self._input_dirs, self._output_dirs[0],
[command.Copy('%(input0)s/in0', '%(output)s/out')])
self.assertEquals('FirstTimedata0',
pynacl.file_tools.ReadFile(self._output_files[0]))
def test_HitsCacheSecondTime(self):
# Test that the computation is not performed on a second instance.
with pynacl.working_directory.TemporaryWorkingDirectory() as work_dir:
self.GenerateTestData('HitsCacheSecondTime', work_dir)
self._tally = 0
def Copy(logger, subst, src, dst):
self._tally += 1
shutil.copyfile(subst.SubstituteAbsPaths(src),
subst.SubstituteAbsPaths(dst))
self._url = None
def stash_url(urls):
self._url = urls
o = once.Once(storage=pynacl.fake_storage.FakeStorage(),
print_url=stash_url, system_summary='test')
o.Run('test', self._input_dirs, self._output_dirs[0],
[command.Runnable(None, Copy,'%(input0)s/in0', '%(output)s/out')])
initial_url = self._url
self._url = None
o.Run('test', self._input_dirs, self._output_dirs[1],
[command.Runnable(None, Copy,'%(input0)s/in0', '%(output)s/out')])
self.assertEquals(pynacl.file_tools.ReadFile(self._input_files[0]),
pynacl.file_tools.ReadFile(self._output_files[0]))
self.assertEquals(pynacl.file_tools.ReadFile(self._input_files[0]),
pynacl.file_tools.ReadFile(self._output_files[1]))
self.assertEquals(1, self._tally)
self.assertEquals(initial_url, self._url)
def test_CachedCommandRecorded(self):
with pynacl.working_directory.TemporaryWorkingDirectory() as work_dir:
self.GenerateTestData('CachedCommand', work_dir)
o = once.Once(storage=pynacl.fake_storage.FakeStorage(),
system_summary='test')
o.Run('test', self._input_dirs, self._output_dirs[0],
[command.Copy('%(input0)s/in0', '%(output)s/out')])
self.assertEquals(len(o.GetCachedCloudItems()), 1)
def test_UncachedCommandsNotRecorded(self):
with pynacl.working_directory.TemporaryWorkingDirectory() as work_dir:
self.GenerateTestData('CachedCommand', work_dir)
o = once.Once(storage=pynacl.fake_storage.FakeStorage(),
system_summary='test', cache_results=False)
o.Run('test', self._input_dirs, self._output_dirs[0],
[command.Copy('%(input0)s/in0', '%(output)s/out')])
self.assertEquals(len(o.GetCachedCloudItems()), 0)
def FileLength(self, src, dst, **kwargs):
"""Command object to write the length of one file into another."""
return command.Command([
sys.executable, '-c',
'import sys; open(sys.argv[2], "wb").write('
'str(len(open(sys.argv[1], "rb").read())))', src, dst
], **kwargs)
def test_RecomputeHashMatches(self):
# Test that things don't get stored to the output cache if they exist
# already.
with pynacl.working_directory.TemporaryWorkingDirectory() as work_dir:
# Setup test data in input0, input1 using memory storage.
self.GenerateTestData('RecomputeHashMatches', work_dir)
fs = pynacl.fake_storage.FakeStorage()
o = once.Once(storage=fs, system_summary='test')
# Run the computation (compute the length of a file) from input0 to
# output0.
o.Run('test', self._input_dirs, self._output_dirs[0],
[self.FileLength(
'%(input0)s/in0', '%(output)s/out')])
# Check that 3 writes have occurred. One to write a mapping from in->out,
# one for the output data, and one for the log file.
self.assertEquals(3, fs.WriteCount())
# Run the computation again from input1 to output1.
# (These should have the same length.)
o.Run('test', self._input_dirs, self._output_dirs[1],
[self.FileLength(
'%(input1)s/in1', '%(output)s/out')])
# Write count goes up by one as an in->out hash is added,
# but no new output is stored (as it is the same).
self.assertEquals(4, fs.WriteCount())
# Check that the test is still valid:
# - in0 and in1 have equal length.
# - out0 and out1 have that length in them.
# - out0 and out1 agree.
self.assertEquals(
str(len(pynacl.file_tools.ReadFile(self._input_files[0]))),
pynacl.file_tools.ReadFile(self._output_files[0])
)
self.assertEquals(
str(len(pynacl.file_tools.ReadFile(self._input_files[1]))),
pynacl.file_tools.ReadFile(self._output_files[1])
)
self.assertEquals(
pynacl.file_tools.ReadFile(self._output_files[0]),
pynacl.file_tools.ReadFile(self._output_files[1])
)
def test_FailsWhenWritingFails(self):
# Check that once doesn't eat the storage layer failures for writes.
with pynacl.working_directory.TemporaryWorkingDirectory() as work_dir:
self.GenerateTestData('FailsWhenWritingFails', work_dir)
def call(cmd, **kwargs):
# Cause gsutil commands to fail.
return 1
bad_storage = pynacl.gsd_storage.GSDStorage(
gsutil=['mygsutil'],
write_bucket='mybucket',
read_buckets=[],
call=call)
o = once.Once(storage=bad_storage, system_summary='test')
self.assertRaises(pynacl.gsd_storage.GSDStorageError, o.Run, 'test',
self._input_dirs, self._output_dirs[0],
[command.Copy('%(input0)s/in0', '%(output)s/out')])
def test_UseCachedResultsFalse(self):
# Check that the use_cached_results=False does indeed cause computations
# to be redone, even when present in the cache.
with pynacl.working_directory.TemporaryWorkingDirectory() as work_dir:
self.GenerateTestData('UseCachedResultsFalse', work_dir)
self._tally = 0
def Copy(logger, subst, src, dst):
self._tally += 1
shutil.copyfile(subst.SubstituteAbsPaths(src),
subst.SubstituteAbsPaths(dst))
o = once.Once(storage=pynacl.fake_storage.FakeStorage(),
use_cached_results=False,
system_summary='test')
o.Run('test', self._input_dirs, self._output_dirs[0],
[command.Runnable(None, Copy,'%(input0)s/in0', '%(output)s/out')])
o.Run('test', self._input_dirs, self._output_dirs[1],
[command.Runnable(None, Copy,'%(input0)s/in0', '%(output)s/out')])
self.assertEquals(2, self._tally)
self.assertEquals(pynacl.file_tools.ReadFile(self._input_files[0]),
pynacl.file_tools.ReadFile(self._output_files[0]))
self.assertEquals(pynacl.file_tools.ReadFile(self._input_files[0]),
pynacl.file_tools.ReadFile(self._output_files[1]))
def test_CacheResultsFalse(self):
# Check that setting cache_results=False prevents results from being written
# to the cache.
with pynacl.working_directory.TemporaryWorkingDirectory() as work_dir:
self.GenerateTestData('CacheResultsFalse', work_dir)
storage = pynacl.fake_storage.FakeStorage()
o = once.Once(storage=storage, cache_results=False, system_summary='test')
o.Run('test', self._input_dirs, self._output_dirs[0],
[command.Copy('%(input0)s/in0', '%(output)s/out')])
self.assertEquals(0, storage.ItemCount())
self.assertEquals(pynacl.file_tools.ReadFile(self._input_files[0]),
pynacl.file_tools.ReadFile(self._output_files[0]))
def test_Mkdir(self):
# Test the Mkdir convenience wrapper works.
with pynacl.working_directory.TemporaryWorkingDirectory() as work_dir:
self.GenerateTestData('Mkdir', work_dir)
foo = os.path.join(work_dir, 'foo')
o = once.Once(storage=pynacl.fake_storage.FakeStorage(),
cache_results=False, system_summary='test')
o.Run('test', self._input_dirs, foo,
[command.Mkdir('%(output)s/hi')])
self.assertTrue(os.path.isdir(os.path.join(foo, 'hi')))
def test_Command(self):
# Test a plain command.
with pynacl.working_directory.TemporaryWorkingDirectory() as work_dir:
self.GenerateTestData('Command', work_dir)
o = once.Once(storage=pynacl.fake_storage.FakeStorage(),
system_summary='test')
o.Run('test', self._input_dirs, self._output_dirs[0],
[command.Command([
sys.executable, '-c',
'import sys; open(sys.argv[1], "wb").write("hello")',
'%(output)s/out'])])
self.assertEquals(
'hello',
pynacl.file_tools.ReadFile(self._output_files[0])
)
def test_NumCores(self):
# Test that the core count is substituted. Since we don't know how many
# cores the test machine will have, just check that it's an integer.
with pynacl.working_directory.TemporaryWorkingDirectory() as work_dir:
self.GenerateTestData('NumCores', work_dir)
o = once.Once(storage=pynacl.fake_storage.FakeStorage(),
system_summary='test')
def CheckCores(logger, subst):
self.assertNotEquals(0, int(subst.Substitute('%(cores)s')))
o.Run('test', {}, self._output_dirs[0], [command.Runnable(None,
CheckCores)])
def test_RunConditionsFalse(self):
# Test that a command uses run conditions to decide whether or not to run.
with pynacl.working_directory.TemporaryWorkingDirectory() as work_dir:
self.GenerateTestData('Command', work_dir)
o = once.Once(storage=pynacl.fake_storage.FakeStorage(),
system_summary='test')
o.Run('test', self._input_dirs, self._output_dirs[0],
[command.Command([
sys.executable, '-c',
'import sys; open(sys.argv[1], "wb").write("hello")',
'%(output)s/out'],
run_cond=lambda cmd_opts: True),
command.Command([
sys.executable, '-c',
'import sys; open(sys.argv[1], "wb").write("not hello")',
'%(output)s/out'],
run_cond=lambda cmd_opts: False)])
self.assertEquals(
'hello',
pynacl.file_tools.ReadFile(self._output_files[0])
)
def test_OutputsFlushPathHashCache(self):
# Test that commands that output to a directory that has an input hash
# value cached raise an error indicating an input output cycle.
with pynacl.working_directory.TemporaryWorkingDirectory() as work_dir:
self.GenerateTestData('CacheFlush', work_dir)
o = once.Once(storage=pynacl.fake_storage.FakeStorage(),
system_summary='test')
self.assertRaises(
once.UserError, o.Run,
'test', self._input_dirs, self._input_dirs['input0'],
[command.Copy('%(input0)s/in0', '%(output)s/out')])
if __name__ == '__main__':
unittest.main()
|
