Mockito for Spring

Unit testing the service layer

RegistrationService validates the following rules:

• The user ID, password, first name, or last name cannot be empty
• The first and last names cannot contain numbers
• The first and last names cannot contain special characters
• The password should contain at least one special character
• There cannot be a duplicate user ID

RegistrationService should call the database to determine whether a user ID exists or not. We'll create a data access interface for persisting user and to check whether a duplicate user ID is present. Perform the following steps to build the service, create a data access object API, and unit test the service:

1. Create a RegistrationDao interface in the com.packt.dao package, and add the following methods to check ...