Spock: boldly go where no test has gone before - Devoxx12
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Spock is a testing framework for Java and Groovy applications that is inspired by JUnit, RSpec, jMock, Mockito, Groovy and Scala. It uses a specification-based approach to testing that allows tests to be written in a more expressive manner than traditional unit tests. Spock tests can range from unit to end-to-end testing and leverage Groovy language features.
Spock: boldly go where no test has gone before - Devoxx12
- 2. Spock: Boldly go where no test has gone before Andres Almiray Canoo Fellow Canoo Engineering AG @aalmiray
- 3. Andres Almiray Speaker Bio ■ Java developer since the beginning ■ True believer in open source ■ Groovy committer since 2007 ■ Project lead of the Griffon framework ■ Currently working for 3
- 4. What is Spock? Where, Who, How? Why? ■ http://spockframework.org ■ Expressive testing language ■ Peter Niederwiser @pniederw ■ Easy to learn ■ Usable from unit to end-to-end ■ Groovy based Testing Language level ■ Byte code manipulation at compile ■ Leverages Groovy language time features ■ Inspired by JUnit, Rspec, jMock, ■ Runs with JUnit: compatible with Mockito, Groovy, Scala and IDEs, build tools CI Vulcans ■ Extensible for specialized testing scenarios 4
- 5. First Cut class HelloSpock extends spock.lang.Specification { def length of Spock's and his friends' names() { expect: name.size() == length where: name | length Spock | 5 Kirk | 4 Scotty | 6 } } 5
- 6. Introducing a bug class HelloSpock extends spock.lang.Specification { def length of Spock's and his friends' names() { expect: name.size() == length where: name | length Spock | 5 Kirk | 4 Scotty | 7 } } 6
- 7. A wild error appears! Condition not satisfied: name.size() == length | | | | | 6 | 7 Scotty false at com.acme.HelloSpock.length of Spock's and his friends' names(HelloSpock.groovy:6) 7
- 8. Feature List (1) Blocks ■ given: preconditions, data fixtures, etc. ■ when: actions that trigger some outcome ■ then: makes assertions about outcome ■ expect: short alternative to when then ■ where: applies varied inputs ■ and: sub-divides other blocks ■ setup: alias for given ■ cleanup: post-conditions, housekeeping, etc. 8
- 9. Feature List (2) Lifecycle Data Driven ■ setup ■ List based variables ■ cleanup ■ Table based variables ■ setupSpec ■ @Unroll ■ cleanupSpec ■ @Shared 9
- 10. Unrolling class HelloSpock extends spock.lang.Specification { @Unroll def Length of #name should be #name.size(), actual value is #length() { expect: name.size() == length where: name | length Spock | 5 Kirk | 4 Scotty | 6 } } 10
- 11. Unrolling as seen by an IDE 11
- 12. Interactions (Mocks) class BindableSpec extends Specification { def Model properties are observable() { given: def model = new Model() def listener = Mock(PropertyChangeListener) when: model.addPropertyChangeListener(listener) model.name = 'Groovy' model.name = 'Java' then: 1 * listener.propertyChange({it.newValue == 'Groovy'}) 1 * listener.propertyChange({it.newValue == 'Java'}) } } 12
- 13. But wait, there’s more! ■ http://docs.spockframework.org/en/latest/ ■ Spock is extensible via plugins ■ Functional web testing with GEB ■ Plugins exist for Grails and Griffon ■ Next release will be 1.0 13
- 14. QA Andres Almiray @aalmiray