schemaAt abstract method

Future<InitializedSchema<DB>> schemaAt(int version)

Creates a new database and instantiates the schema with the given version.

This can be used as a starting point for a complex schema migration test to verify data integrity. You can roughly follow these steps to write such tests:

• call schemaAt with the starting version you want to test
• use the InitializedSchema.rawDatabase of the returned InitializedSchema to insert data.
• connect your database class to a InitializedSchema.newConnection
• call migrateAndValidate with the database and your target schema version to run a migration and verify that it yields the desired schema when done.
• run select statements on your database to verify that the data from step 2 hasn't been affected by the migration.

If you only want to verify the schema without data, using startAt might be easier.

Implementation

Future<InitializedSchema<DB>> schemaAt(int version);