def test_parallel_generation(self):
cache = Cache(self.__dir, 20)
def gen():
yield from [b"0", b"12", b"345", b"6789"]
g1 = cache.set_generated("key", gen)
g2 = cache.set_generated("key", gen)
next(g1)
files = os.listdir(self.__dir)
self.assertEqual(len(files), 1)
for x in files:
self.assertTrue(x.endswith(".part"))
next(g2)
files = os.listdir(self.__dir)
self.assertEqual(len(files), 2)
for x in files:
self.assertTrue(x.endswith(".part"))
self.assertEqual(cache.size, 0)
for x in g1:
pass
self.assertEqual(cache.size, 10)
self.assertTrue(cache.has("key"))
# Replace the file - size should stay the same
for x in g2:
pass
self.assertEqual(cache.size, 10)
self.assertTrue(cache.has("key"))
# Only a single file
self.assertEqual(len(os.listdir(self.__dir)), 1)
def test_delete(self):
cache = Cache(self.__dir, 25, min_time=0)
val = b"0123456789"
cache.set("key1", val)
self.assertTrue(cache.has("key1"))
self.assertEqual(cache.size, 10)
cache.delete("key1")
self.assertFalse(cache.has("key1"))
self.assertEqual(cache.size, 0)
def test_accessing_preserves(self):
cache = Cache(self.__dir, 25, min_time=0)
val = b"0123456789"
cache.set("key1", val)
cache.set("key2", val)
self.assertEqual(cache.size, 20)
cache.get_value("key1")
cache.set("key3", val)
self.assertEqual(cache.size, 20)
self.assertTrue(cache.has("key1"))
self.assertFalse(cache.has("key2"))
self.assertTrue(cache.has("key3"))
def test_store_literal(self):
cache = Cache(self.__dir, 10)
val = b"0123456789"
cache.set("key", val)
self.assertEqual(cache.size, 10)
self.assertTrue(cache.has("key"))
self.assertEqual(cache.get_value("key"), val)
def test_automatic_delete_oldest(self):
cache = Cache(self.__dir, 25, min_time=0)
val = b"0123456789"
cache.set("key1", val)
self.assertTrue(cache.has("key1"))
self.assertEqual(cache.size, 10)
cache.set("key2", val)
self.assertEqual(cache.size, 20)
self.assertTrue(cache.has("key1"))
self.assertTrue(cache.has("key2"))
cache.set("key3", val)
self.assertEqual(cache.size, 20)
self.assertFalse(cache.has("key1"))
self.assertTrue(cache.has("key2"))
self.assertTrue(cache.has("key3"))
def test_missing_cache_file(self):
cache = Cache(self.__dir, 10, min_time=0)
val = b"0123456789"
os.remove(cache.set("key", val))
self.assertEqual(cache.size, 10)
self.assertFalse(cache.has("key"))
self.assertEqual(cache.size, 0)
os.remove(cache.set("key", val))
self.assertEqual(cache.size, 10)
with self.assertRaises(CacheMiss):
cache.get("key")
self.assertEqual(cache.size, 0)
def test_existing_files_order(self):
cache = Cache(self.__dir, 30)
val = b"0123456789"
cache.set("key1", val)
cache.set("key2", val)
cache.set("key3", val)
self.assertEqual(cache.size, 30)
# file mtime is accurate to the second
time.sleep(1)
cache.get_value("key1")
cache = Cache(self.__dir, 30, min_time=0)
self.assertEqual(cache.size, 30)
self.assertTrue(cache.has("key1"))
self.assertTrue(cache.has("key2"))
self.assertTrue(cache.has("key3"))
cache.set("key4", val)
self.assertEqual(cache.size, 30)
self.assertTrue(cache.has("key1"))
self.assertFalse(cache.has("key2"))
self.assertTrue(cache.has("key3"))
self.assertTrue(cache.has("key4"))
def test_store_generated(self):
cache = Cache(self.__dir, 10)
val = [b"0", b"12", b"345", b"6789"]
def gen():
yield from val
t = []
for x in cache.set_generated("key", gen):
t.append(x)
self.assertEqual(cache.size, 0)
self.assertFalse(cache.has("key"))
self.assertEqual(t, val)
self.assertEqual(cache.size, 10)
self.assertEqual(cache.get_value("key"), b"".join(val))
def test_missing(self):
cache = Cache(self.__dir, 10)
self.assertFalse(cache.has("missing"))
with self.assertRaises(CacheMiss):
cache.get_value("missing")