This document provides an overview of Spock, a testing framework for Java and Groovy. It describes how to include Spock tests in a project, run Spock tests, debug Spock tests, view test coverage, and integrate Spock tests with Sonar. It also explains Spock specifications, feature methods, blocks like setup, when/then, expect, and cleanup. It demonstrates how to write conditions, handle exceptions, create helper methods, mocks, stubs, and spies in Spock tests.

2. Por que Spock?

3. Spock para tudo

4. Spock usa o JUnit runner
• Como incluir testes spock em meu projeto?
• Como rodar testes spock?
• Como debugar testes spock
• Como visualizar a cobertura de testes?
• como integrar testes spock com o sonar?
• como eu…?

5. Como eu...?
Resposta: “da mesma forma do JUnit”

6. Specification

7. Instance Fields
def obj = new ClassUnderSpecification()
def coll = new Collaborator()

8. @Shared res = new VeryExpensiveResource()
static final PI = 3.141592654
Anotação @Shared

9. Fixture Methods
def setup() {} // run before every feature method
def cleanup() {} // run after every feature method
def setupSpec() {} // run before the first feature
method
def cleanupSpec() {} // run after the last feature
method

10. Feature Methods
def "pushing an element on the stack"() {
// blocks go here
}

11. Blocks

12. Setup Blocks
setup:
def stack = new Stack()
def elem = "push me"

13. When and Then Blocks
when: // stimulus
then: // response

14. Expect Blocks
when:
def x = Math.max(1, 2)
then:
x == 2
expect:
Math.max(1, 2) == 2

15. Cleanup Blocks
setup:
def file = new File("/some/path")
file.createNewFile()
// ...
cleanup:
file.delete()
• Um bloco Cleanup só pode ser seguido por um bloco
where
• Normalmente usados para fechar uma conexão com
banco de dados ou outro recurso.

16. Where Blocks
def "computing the maximum of two numbers"() {
expect:
Math.max(a, b) == c
where:
a << [5, 3]
b << [1, 9]
c << [5, 9]
}

17. Erros de assert JUnit

18. Erros de assert Spock

19. Specifications as Documentation
setup: "open a database connection"
// code goes here
// code goes here
and: "seed the customer table"
// code goes here
and: "seed the product table"
// code goes here

20. Condições
when:
stack.push(elem)
then:
!stack.empty
stack.size() == 1
stack.peek() == elem

21. Condições de Exceção
when:
stack.pop()
then:
thrown(EmptyStackException)
stack.empty
when:
stack.pop()
then:
notThrown(NullPointerException)

22. Helper Methods
def "offered PC matches preferred configuration"() {
when:
def pc = shop.buyPc()
then:
matchesPreferredConfiguration(pc)
}
def matchesPreferredConfiguration(pc) {
assert pc.vendor == "Sunny"
assert pc.clockRate >= 2333
assert pc.ram >= 4096
assert pc.os == "Linux"
}

23. def "events are published to all subscribers"() {
def subscriber1 = Mock(Subscriber)
def subscriber2 = Mock(Subscriber)
def publisher = new Publisher()
publisher.add(subscriber1)
publisher.add(subscriber2)
when:
publisher.fire("event")
then:
1 * subscriber1.receive("event")
1 * subscriber2.receive("event")
}

24. Criando Mocks
def subscriber = Mock(Subscriber)
ou
Subscriber subscriber = Mock()

25. class PublisherSpec extends Specification {
Publisher publisher = new Publisher()
Subscriber subscriber = Mock()
Subscriber subscriber2 = Mock()
def setup() {
publisher.subscribers << subscriber // << is a Groovy
shorthand for List.add()
publisher.subscribers << subscriber2
}
}

26. def "should send messages to all subscribers"() {
when:
publisher.send("hello")
then:
1 * subscriber.receive("hello")
1 * subscriber2.receive("hello")
}

27. Stubbing
interface Subscriber {
String receive(String message)
}

28. def subscriber = Mock(Subscriber)
subscriber.receive("message1") >> "ok"
subscriber.receive("message2") >> "fail"
subscriber.receive(_) >>> ["ok", "error", "error", "ok"]
subscriber.receive(_) >> {
throw new InternalError("ouch")
}

29. Spies (evitar)
def subscriber = Spy(SubscriberImpl, constructorArgs: ["Fred"])
subscriber.receive(_) >> "ok"

31. Referências
http://codepipes.com/presentations/spock-vs-junit.pdf
http://spockframework.github.io/spock/docs/1.0/interaction_based_testing.html
http://spockframework.github.io/spock/docs/1.0/spock_primer.html
Testing java with spock (Konstantinos Kapelonis)