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import unittest
import os
import shutil
import tempfile
import binascii
from chroma.cache import verify_or_create_dir, Cache, GeometryNotFoundError
from chroma.geometry import Geometry, Solid
from chroma.make import box
def random_tempdir(prefix):
'''Select a random directory name inside the $TMP directory that
starts with ``prefix`` and ends with a random hex string.'''
subdir = prefix + '_' + binascii.b2a_hex(os.urandom(8))
return os.path.join(tempfile.gettempdir(), subdir)
def remove_path(path):
'''If path is a file, delete it. If it is a directory, remove it.
If it doesn't exist, do nothing.'''
if os.path.isfile(path):
os.remove(path)
elif os.path.isdir(path):
shutil.rmtree(path)
class TestVerifyOrCreateDir(unittest.TestCase):
def setUp(self):
self.test_dir = random_tempdir('vcd')
def test_no_dir(self):
assert not os.path.isdir(self.test_dir)
verify_or_create_dir(self.test_dir, 'msg')
assert os.path.isdir(self.test_dir)
def test_exist_dir(self):
os.mkdir(self.test_dir)
assert os.path.isdir(self.test_dir)
verify_or_create_dir(self.test_dir, 'msg')
assert os.path.isdir(self.test_dir)
def test_exist_file(self):
f = open(self.test_dir, 'w')
f.write('foo')
f.close()
with self.assertRaises(IOError):
verify_or_create_dir(self.test_dir, 'msg')
def tearDown(self):
remove_path(self.test_dir)
class TestCacheCreation(unittest.TestCase):
def setUp(self):
self.cache_dir = random_tempdir('chroma_cache_test')
def test_creation(self):
assert not os.path.isdir(self.cache_dir)
cache = Cache(self.cache_dir)
assert os.path.isdir(self.cache_dir)
def test_recreation(self):
assert not os.path.isdir(self.cache_dir)
cache = Cache(self.cache_dir)
del cache
assert os.path.isdir(self.cache_dir)
cache = Cache(self.cache_dir)
assert os.path.isdir(self.cache_dir)
def tearDown(self):
remove_path(self.cache_dir)
class TestCacheGeometry(unittest.TestCase):
def setUp(self):
self.cache_dir = random_tempdir('chroma_cache_test')
self.cache = Cache(self.cache_dir)
self.a = Geometry()
self.a.add_solid(Solid(box(1,1,1)))
self.a.add_solid(Solid(box(1,1,1)), displacement=(10,10,10))
self.a.flatten()
self.b = Geometry()
self.b.add_solid(Solid(box(2,2,2)))
self.b.add_solid(Solid(box(2,2,2)), displacement=(10,10,10))
self.b.add_solid(Solid(box(2,2,2)), displacement=(-10,-10,-10))
self.b.flatten()
def test_list_geometry(self):
self.assertEqual(len(self.cache.list_geometry()), 0)
self.cache.save_geometry('a', self.a)
l = self.cache.list_geometry()
self.assertEqual(len(l), 1)
self.assertIn('a', l)
self.cache.save_geometry('b', self.b)
l = self.cache.list_geometry()
self.assertEquals(len(l), 2)
self.assertIn('a', l)
self.assertIn('b', l)
self.cache.save_geometry('a', self.a)
l = self.cache.list_geometry()
self.assertEquals(len(l), 2)
self.assertIn('a', l)
self.assertIn('b', l)
def test_load_geometry_not_found(self):
with self.assertRaises(GeometryNotFoundError):
self.cache.load_geometry('a')
def test_save_load_new_geometry(self):
self.cache.save_geometry('b', self.b)
b = self.cache.load_geometry('b')
def test_replace_geometry(self):
self.cache.save_geometry('b', self.b)
b = self.cache.load_geometry('b')
self.assertEqual(b.mesh.md5(), self.b.mesh.md5())
self.cache.save_geometry('b', self.b)
b = self.cache.load_geometry('b')
self.assertEqual(b.mesh.md5(), self.b.mesh.md5())
def test_remove_geometry(self):
self.cache.save_geometry('b', self.b)
self.assertIn('b', self.cache.list_geometry())
self.cache.remove_geometry('b')
self.assertNotIn('b', self.cache.list_geometry())
def test_get_geometry_hash(self):
self.cache.save_geometry('b', self.b)
self.assertEqual(self.cache.get_geometry_hash('b'), self.b.mesh.md5())
def test_get_geometry_hash_not_found(self):
with self.assertRaises(GeometryNotFoundError):
self.cache.get_geometry_hash('a')
def test_default_geometry(self):
self.cache.save_geometry('a', self.a)
self.cache.save_geometry('b', self.b)
with self.assertRaises(GeometryNotFoundError):
self.cache.set_default_geometry('c')
self.cache.set_default_geometry('b')
b = self.cache.load_default_geometry()
self.cache.set_default_geometry('a')
a = self.cache.load_default_geometry()
def test_default_geometry_corruption(self):
self.cache.save_geometry('a', self.a)
self.cache.save_geometry('b', self.b)
# Put a file where a symlink should be
default_symlink_path = self.cache.get_geometry_filename('.default')
with open(default_symlink_path, 'w') as f:
f.write('foo')
with self.assertRaises(IOError):
self.cache.set_default_geometry('b')
# Verify file not modified
assert os.path.isfile(default_symlink_path)
with open(default_symlink_path) as f:
self.assertEqual(f.read(), 'foo')
def tearDown(self):
remove_path(self.cache_dir)
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