Uma breve apresentação do framework de teste Spock

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)