* Consistently lock in ensureVersionTable and do not call ensureVersionTable from Drop across all database implementations
* Add test for dropping postgres databases
* Fix failing database tests
* Fix CockroachDb test, lock table should be created before versionTable
* Add Initialize() to Driver interface, and add integration tests for Drop() between database implementations and migrate
* Remove Initialize, document breaking behaviour of Drop
* Revert introduction of Initialize method
* Removed Initialize in Stub as well
* Remove call to non-existent Initialize and make sure to close re-initialized database connections
* Revert changes to TestDrop in database/testing
* Split Test and TestMigrate into different test entrypoints
* Remove unused import in migrate_testing
* Remove erroneous code to fix tests
* Add stub source imports to database tests
* Add Stub source to migrate tests
* Use example migrations for tests
* Add file driver to database tests
* Align database directory layout
* Add file source driver to Cassandra
* Review changes
* Minor syntactic change for cleaner diff
- Leaving migrate/testing in case there are unknown consumers
- Add migrate/dktesting package
- Update tests to use migrate/dktesting instead of migrate/testing
There is lock conflict on parallel migrations in different postgres
schemas. To avoid this conflicts function GenerateAdvisoryLockId added
variadic params to change lock id with schema name. Schema name taked
with postgres CURRENT_SCHEMA function. Null byte used as separator
between database and schema name, because any other symbol may be used
in both of it.
Closes#118
