This document discusses test-driven development (TDD) using the Spock testing framework. Spock is an open source testing framework for Java and Groovy applications that uses a specification-based approach inspired by behavior-driven development. It allows writing tests in a more descriptive and expressive manner than JUnit, with features like data-driven testing, mocking, and extensions. The document provides an overview of Spock's capabilities and benefits, demonstrates its syntax and features through examples, and discusses setup, usage, and additional resources.

1. TDD
with
Spock
Izzet Mustafayev@EPAM Systems
@webdizz
http://webdizz.name

2. ● SA at EPAM Systems
● primary skill is Java
● hands-on-coding with Ruby, Groovy and little bit
of Scala
● passion about agile, clean code practices and
devops

3. agenda
● introduction
● what is ..?
● why Spock?
● details by examples
● summary
● q&a

4. What is TDD?

5. What is Spock?

6. Spock

7. Easy to learn

8. Expressive testing language

9. Good for unit and e2e tests

10. Compatible with JUnit

11. Extensible for specific needs

12. Informative

13. What about?..

14. Let’s start

15. Setup
// Gradle example
apply plugin: "groovy"
//....
dependencies {
groovy "org.codehaus.groovy:groovy-all:2.1.5"
testCompile "org.spockframework:spock-core:1.0-
groovy-2.0-SNAPSHOT"
}
# Buildr example (ruby)
require 'buildr/groovy'
# ...
define "tdd-with-spock" do
test.compile.with 'org.spockframework:spock-core:
jar:0.7-groovy-2.0'
end
​

16. Anatomy explained

17. ● setup:
● expect:
● when:
● then:
● and:
Given When Then

18. Given When Then

19. Data driven
@Unroll
def 'should not allow value: #cardNumber'(){
def testingInstance = new CreditCardValidator()
when:
def res = testingInstance.isValid(cardNumber)
then:
res == false
where:
cardNumber | _
null | _
'' | _
}
​

20. Data driven

21. Exceptional case
def 'it should not get not existing order entry '() {
when:
skuCode = "anotherSkuCode"
OrderUtils.getOrderEntryBySku(orderModel, skuCode)
then:
thrown(OrderEntryNotFoundException)
}
​

22. Exceptional case

23. Fixtures
def testingInstance
def setup(){
testingInstance = new CreditCardValidator()
}
@Unroll
def 'should not allow value: #cardNumber'(){
when:
def res = testingInstance.isValid(cardNumber)
then:
res == false
where:
cardNumber | _
null | _
'' | _
}
​

24. Fixtures

25. TargetClass mock = Mock()
mock.find("itemId") >> item
1 * mock.receive("msg")
(1..3) * mock.receive(_)
(1.._) * mock.receive(_ as String)
Mocking

26. Mocking
1 * mock.receive(!null)
1 * mock.receive({it.contains("m")})
1 * mock.find({it.contains("m")) >> item
(1.._) * mock./(set[A-Za-z]*)/(_)​
(_.._) * _._(*_) >> _ // :)

27. Mocking

28. Extensions
@Ignore
@IgnoreRest
@IgnoreIf({System.getProperty('app.env’).contains
('ci’)})
@FailsWith
@Timeout(10)
@AutoCleanup
@Stepwise

29. Extensions

30. Summary

31. pros
● junit compliant
● expressive
● dynamic
● informative

32. cons
● groovy knowledge
● groovy slowness*

33. ➔ Homepage http://spockframework.org
➔ Source Code http://github.spockframework.org/spock
➔ Documentation http://docs.spockframework.
org/en/latest
➔ Spock Web Console http://webconsole.spockframework.
org
➔ Spock Example Project http://github.spockframework.
org/spock-example
➔ Talk’s source code http://github.com/webdizz/tdd-
with-spock
Reference

35. Thank YOU!
TDD with Spock
Izzet Mustafayev@EPAM Systems
@webdizz
http://webdizz.name