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# Copyright (C) 2012-2014 Codethink Limited
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; version 2 of the License.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
import copy
import unittest
import morphlib
class DummyBuildEnvironment:
'''Fake build environment class that doesn't need
settings to pick the environment, it just gets passed
a dict representing it
'''
def __init__(self, env, arch):
self.env = env
class CacheKeyComputerTests(unittest.TestCase):
def setUp(self):
loader = morphlib.morphloader.MorphologyLoader()
self.source_pool = morphlib.sourcepool.SourcePool()
for name, text in {
'chunk.morph': '''
name: chunk
kind: chunk
description: A test chunk
''',
'chunk2.morph': '''
name: chunk2
kind: chunk
description: A test chunk
''',
'chunk3.morph': '''
name: chunk3
kind: chunk
description: A test chunk
''',
'stratum.morph': '''
name: stratum
kind: stratum
build-depends: []
chunks:
- name: chunk
repo: repo
ref: original/ref
build-depends: []
''',
'stratum2.morph': '''
name: stratum2
kind: stratum
build-depends: []
chunks:
- name: chunk2
repo: repo
ref: original/ref
build-depends: []
- name: chunk3
repo: repo
ref: original/ref
build-depends: []
''',
'system.morph': '''
name: system
kind: system
arch: testarch
strata:
- morph: stratum
- morph: stratum2
''',
}.iteritems():
source = morphlib.source.Source(
'repo', 'original/ref', 'sha', 'tree',
loader.load_from_string(text), name)
self.source_pool.add(source)
# FIXME: This should use MorphologyFactory
m = source.morphology
if m['kind'] == 'system':
m.builds_artifacts = [m['name'] + '-rootfs']
elif m['kind'] == 'stratum':
m.builds_artifacts = [m['name']]
elif m['kind'] == 'chunk':
m.builds_artifacts = [m['name']]
self.build_env = DummyBuildEnvironment({
"LOGNAME": "foouser",
"MORPH_ARCH": "dummy",
"TARGET": "dummy-baserock-linux-gnu",
"TARGET_STAGE1": "dummy-baserock-linux-gnu",
"USER": "foouser",
"USERNAME": "foouser"}, 'dummy')
self.artifact_resolver = morphlib.artifactresolver.ArtifactResolver()
self.artifacts = self.artifact_resolver.resolve_artifacts(
self.source_pool)
self.ckc = morphlib.cachekeycomputer.CacheKeyComputer(self.build_env)
def _find_artifact(self, name):
for artifact in self.artifacts:
if artifact.name == name:
return artifact
def test_compute_key_hashes_all_types(self):
runcount = {'thing': 0, 'dict': 0, 'list': 0, 'tuple': 0}
def inccount(func, name):
def f(sha, item):
runcount[name] = runcount[name] + 1
func(sha, item)
return f
self.ckc._hash_thing = inccount(self.ckc._hash_thing, 'thing')
self.ckc._hash_dict = inccount(self.ckc._hash_dict, 'dict')
self.ckc._hash_list = inccount(self.ckc._hash_list, 'list')
self.ckc._hash_tuple = inccount(self.ckc._hash_tuple, 'tuple')
artifact = self._find_artifact('system-rootfs')
self.ckc.compute_key(artifact)
self.assertNotEqual(runcount['thing'], 0)
self.assertNotEqual(runcount['dict'], 0)
self.assertNotEqual(runcount['list'], 0)
self.assertNotEqual(runcount['tuple'], 0)
def _valid_sha256(self, s):
validchars = '0123456789abcdef'
return len(s) == 64 and all([c in validchars for c in s])
def test_compute_twice_same_key(self):
artifact = self._find_artifact('system-rootfs')
self.assertEqual(self.ckc.compute_key(artifact),
self.ckc.compute_key(artifact))
def test_compute_twice_same_id(self):
artifact = self._find_artifact('system-rootfs')
id1 = self.ckc.get_cache_id(artifact)
id2 = self.ckc.get_cache_id(artifact)
hash1 = self.ckc._hash_id(id1)
hash2 = self.ckc._hash_id(id2)
self.assertEqual(hash1, hash2)
def test_compute_key_returns_sha256(self):
artifact = self._find_artifact('system-rootfs')
self.assertTrue(self._valid_sha256(
self.ckc.compute_key(artifact)))
def test_different_env_gives_different_key(self):
artifact = self._find_artifact('system-rootfs')
oldsha = self.ckc.compute_key(artifact)
build_env = copy.deepcopy(self.build_env)
build_env.env["USER"] = "brian"
ckc = morphlib.cachekeycomputer.CacheKeyComputer(build_env)
self.assertNotEqual(oldsha, ckc.compute_key(artifact))
def test_same_morphology_text_but_changed_sha1_gives_same_cache_key(self):
old_artifact = self._find_artifact('system-rootfs')
morphology = old_artifact.source.morphology
new_source = morphlib.source.Source('repo', 'original/ref', 'newsha',
'tree', morphology,
old_artifact.source.filename)
sp = morphlib.sourcepool.SourcePool()
for source in self.source_pool:
if source == old_artifact.source:
sp.add(new_source)
else:
sp.add(source)
artifacts = self.artifact_resolver.resolve_artifacts(sp)
for new_artifact in artifacts:
if new_artifact.source == new_source:
break
else:
self.assertTrue(False)
old_sha = self.ckc.compute_key(old_artifact)
new_sha = self.ckc.compute_key(new_artifact)
self.assertEqual(old_sha, new_sha)
def test_same_morphology_added_to_source_pool_only_appears_once(self):
loader = morphlib.morphloader.MorphologyLoader()
m = loader.load_from_string(
'''
name: chunk
kind: chunk
''')
src = morphlib.source.Source('repo', 'original/ref', 'sha', 'tree', m,
'chunk.morph')
sp = morphlib.sourcepool.SourcePool()
sp.add(src)
sp.add(src)
self.assertEqual(1, len([s for s in sp if s == src]))
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