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# Copyright 2025 The Chromium Authors
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
import os
import tempfile
import unittest
import presubmit_caching_support
class DummyResult:
def __init__(self, msg: str):
self.msg = msg
def _TempCacheFile():
file_handle, file_path = tempfile.mkstemp(suffix='.json', text=True)
os.close(file_handle)
return file_path
class PresubmitCachingSupportTest(unittest.TestCase):
def testCanCacheAndRetrieveResult(self):
storage_path = _TempCacheFile()
cache = presubmit_caching_support.PresubmitCache(storage_path,
os.path.dirname(__file__))
cache.StoreResultInCache(1, DummyResult('dummy result'))
retrieved_result = cache.RetrieveResultFromCache(1)
self.assertEqual(retrieved_result.msg, 'dummy result')
def testCanReloadCacheFromDisk(self):
storage_path = _TempCacheFile()
cache = presubmit_caching_support.PresubmitCache(storage_path,
os.path.dirname(__file__))
cache.StoreResultInCache(1, DummyResult('dummy result'))
restored_cache = presubmit_caching_support.PresubmitCache(
storage_path, os.path.dirname(__file__))
retrieved_result = restored_cache.RetrieveResultFromCache(1)
self.assertIsNotNone(retrieved_result)
self.assertEqual(retrieved_result.msg, 'dummy result')
def testDoesntReturnFromDifferentCheck(self):
storage_path = _TempCacheFile()
cache = presubmit_caching_support.PresubmitCache(storage_path,
os.path.dirname(__file__))
cache.StoreResultInCache(1, DummyResult('dummy result'))
restored_cache = presubmit_caching_support.PresubmitCache(
storage_path, os.path.dirname(__file__))
retrieved_result = restored_cache.RetrieveResultFromCache(17)
self.assertIsNone(retrieved_result)
def testChangingDirectoryContentInvalidatesCache(self):
checked_dir = tempfile.mkdtemp()
storage_path = _TempCacheFile()
cache = presubmit_caching_support.PresubmitCache(storage_path, checked_dir)
cache.StoreResultInCache(1, DummyResult('dummy result'))
retrieved_result = cache.RetrieveResultFromCache(1)
self.assertEqual(retrieved_result.msg, 'dummy result')
with open(os.path.join(checked_dir, 'dummy_file'), 'w') as f:
f.write('changing contents of observed directory')
# The cache should be invalidated by the change in the observed directory.
new_retrieved_result = cache.RetrieveResultFromCache(1)
self.assertIsNone(new_retrieved_result)
if __name__ == '__main__':
unittest.main()
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