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IBAN Validator application

Running the application

There are several ways to run the application.

Note: The application creates an SQLite iban.db if it does not already exist, which is used for storing the IBAN numbers.

To run the application you have several options:

  1. Run through Intellij , by running the IbanValidatorApplication configuration
  2. Run through command line via command : ./gradlew bootRun
  3. Run through the Gradle bootRun task
  4. Run gradle built bootJar:
    1. Create the jar by running ./gradlew bootJar
    2. navigate to build/libs and the IbanValidatorApplication-0.0.1-SNAPSHOT.jar should be visible
    3. Execute the jar file via the following command: java -jar .\IbanValidatorApplication-0.0.1-SNAPSHOT.jar

Application structure

The IbanValidatorApplication structure is quite straightforward.

The main package name is com.bank.ibanvalidator.

The com.bank.ibanvalidator.controllers package holds the IBANController, which is used as the main API for the requests , and the ValidationExceptionsControllerAdvice, which is an ControllerAdvice class on how to deal with validation exceptions(since normally on validation responses there are no error messages, or they are messy)

The com.bank.ibanvalidator.entities package holds the required entity/data structure for the application to function. This is the IBAN entity that is being saved and retrieved from the database.

The com.bank.ibanvalidator.interfaces package contains the IBANService interface and the IBANValidationService, which could be used for different services.

The com.bank.ibanvalidator.services package contains the IBANValidationServiceImpl and the IBANRepositoryServiceImpl services, which is responsible for all of the IBAN validation and retrieval/storing of IBAN in the SQLite DB.

Application tests

The application Full tests utilises the test.db located in the top level, for ease of access, which is a copy of an actual db that is being used in production. This is to make sure that the tests are appropriate and replicate the product environment.

There are 4 main testing packages contained in the application:

  1. com.bank.ibanvalidator.FullTest - Which tests the application end to end and confirms that everything is working.
  2. com.bank.ibanvalidator.SmokeTests - Which checks correct bean instantiations
  3. com.bank.ibanvalidator.UnitTests - Contains the unit tests for the IBANValidationService
  4. com.bank.ibanvalidator.ValidationTests - Tests the spring validation layer and error messages

Acceptance Criteria testing

To test the acceptance criteria I used both the output from the FullTest.java, and the output from running the application and using postman to submit a POST request. Screenshots can be seen bellow:

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