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Optionally use an on-disk sqlite db in tests (#11702)

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* Optionally use an on-disk sqlite db in tests

When debugging a test it is sometimes useful to inspect the state of the
DB. This is not easy when the db is in-memory: one cannot attach the
sqlite CLI to another process's DB.

With this change, if SYNAPSE_TEST_PERSIST_SQLITE_DB is set, we use
 `_trial_temp/test.db` as our sqlite database. One can then use 
`sqlite3 _trial_temp/test.db` and query to your heart's content.

The DB is destroyed and recreated between different test cases.

Co-authored-by: Patrick Cloke <clokep@users.noreply.github.com>
This commit is contained in:
David Robertson 2022-01-07 19:13:41 +00:00 • committed by GitHub
parent 2bb4bd1269
commit d3cf0730f8
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3 changed files with 23 additions and 1 deletions
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tests/utils.py
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@ -42,6 +42,10 @@ POSTGRES_HOST = os.environ.get("SYNAPSE_POSTGRES_HOST", None)
POSTGRES_PASSWORD = os.environ.get("SYNAPSE_POSTGRES_PASSWORD", None)
POSTGRES_BASE_DB = "_synapse_unit_tests_base_%s" % (os.getpid(),)
# When debugging a specific test, it's occasionally useful to write the
# DB to disk and query it with the sqlite CLI.
SQLITE_PERSIST_DB = os.environ.get("SYNAPSE_TEST_PERSIST_SQLITE_DB") is not None
# the dbname we will connect to in order to create the base database.
POSTGRES_DBNAME_FOR_INITIAL_CREATE = "postgres"