A PostgreSQL database server running on port 5432, a database instance named postgres with a user postgres and an empty password.

InfrastructureConfiguration - sets up a R2DBC ConnectionFactory based on the R2DBC Postgres driver (r2dbc-postgresql), a DatabaseClient and a R2dbcRepositoryFactory to eventually create a CustomerRepository.

CustomerRepository - a standard Spring Data reactive CRUD repository exposing query methods using manually defined queries

CustomerRepositoryIntegrationTests - to initialize the database with some setup SQL and the inserting and reading Customer instances.