Unit test: Service classes

Testing services

Example:

def "when creating a new thesis author is assigned to thesis"() {
	//2. Setup mocks
	setup:
	//Enable logging for GuttenbergService
	mockLogging(GuttenbergService, true)
	//Create GuttenbergServce
	def guttenbergService = new GuttenbergService()
	//Use the author object created in the "where" statement to create mocked domain objects.
	//In this step, the author instance get's the ID assigned
	mockDomain(Author, [authorInstance])
	//Mock domain class book (required by the guttenberg service)
	mockDomain(Book)

	//3. Call the method to test
	when:
	def thesis = guttenbergService.createThesis(authorInstance.id)

	then:
	//4. Make asserts on the result
	thesis != null
	thesis.author.id == authorInstance.id

	//1. Create a dummy author instance used for the test. This instance has NO id yet
	where:
	authorInstance = new Author(firstname: "John", lastname: "Doe")
}

Find more examples here:

• GuttenbergServiceSpec