An sqlite3 database may be opened with the x-no-tx-wrap=true query
parameter if the user would prefer to retain full control over the
bounds of their transactions. With x-no-tx-wrap enabled, migrations
should contain explicit BEGIN and COMMIT statements. This (optional)
behaviour for the sqlite3 driver is consistent with the default
behaviour for other drivers.
Fixes#346.
* 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
Eng Zer Jun