API End-to-End Tests

GuitarApiE2ETest.java

createBrand_thenCreateGuitar_thenFetchByModelName

End-to-end “happy path” flow that creates a Brand, creates a Guitar linked to that brand, and then fetches the guitar by modelName. Validates the full HTTP → controller → service → repository → database → JSON response pipeline.

creatingDuplicateGuitarModelNameShouldReturnClientError

Attempts to create a second guitar using an existing modelName and asserts the API returns a client error response. Confirms duplicate prevention works correctly at the API level and that the error is surfaced to the client.

creatingGuitarWithoutManufactureDateShouldReturn400

Attempts to create a guitar with a missing required field (manufactureDate) and asserts a 400 Bad Request response. Confirms request validation is enforced and invalid payloads are rejected before persistence.