[CVAT][Exchange Oracle] Use Alembic in tests #2620
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Summary of changes
Previously, to initialise test database, we've dropped all metadata then created it, based on current models. This lacked any awareness of our migrations and schema that was generated by it. Nothing really was testing how schema was applied from migrations, so error in alembic revision file wouldn't affect execution of tests and would be caught only on deployment attempt.
With these changes full
alembic upgrade headandalembic downgrade baseis ran before each test.Since running plain
alembic upgrade/downgradecommands is too slow due to isolated revision executions, before each test session, full SQL ofalembic upgrade headandalembic downgrade head:baseis generated, and then reused for each test case which speeds up things significantly.After tests are executed, the database remains in a clean state with all migrations applied.
Existing migrations had to be modified a bit to ensure they could be rendered as raw SQL in offline mode.
How test the changes
Self-tested in CI.
Related issues