java testing with spock - ken sipe (trexin consulting)

NFJS Software Symposium Series 2013

Ken Sipe

Spock - The Logical Enterprise Testing Tool

Spock TestingAbout Speaker

Developer: Embedded, C++, Java, Groovy, Grails, C#, Objective CSpeaker: JavaOne 2009 Rock Star, NFJS, JAXMicrosoft MCPSun Certified Java 2 ArchitectMaster of Scrums Agile CoachInstructor: VisiBroker CORBA

Rational Rose, OOAD

http://kensipe.blogspot.com/http://del.icio.us/kensipetwitter: @kensipeken.sipe@gmail.com

Spock TestingAgenda

nTestingnIntroduction to SpocknMocking

Spock Testing

Spock Intro

4

Spock Testing

ntesting framework...

nbased on Groovy

nfully compatible with JUnit

nresult of learnings from¨RSpec, BDD, JUnit

5

Spock is...

Spock TestingSpock Can...

nReduces lines of code

nMake tests more readable

nBe extended

6

Spock Testing

JUnit

7

Spock TestingTaxonomy of JUnit

Spock Testing

9

JUnit Pain Points?

Spock TestingUnit testing needs

nConcise, Clear and ReadablenPromote “user” thinking

¨context¨stimulus¨expectations

nProductivity

10

Spock Testing

Groovy

11

Spock TestingTaxonomy of GroovyTestCase

Spock TestingGroovy and Testing

Spock TestingGroovy Power Assert

Condition not satisfied:

interest == calc.calculate(amt, year)| | | | | |

25.0 | | 20.0 100 4 | com.math.SimpleInterestCalculator@606e1dec

false

Spock TestingGroovy Improvements

nConcise, Clear and ReadablenPromote “user” thinking

¨context¨stimulus¨expectations

nProductivity

15

Spock Testing

Spock

16

Spock TestingSpock

nProgrammers Environment¨Groovy

nPromotes Clarity¨structural blocks¨removes noise

17

Spock TestingWhy use Spock?

nExpressive testing languagenEasy to learnnUsable from unit to end-to-endnLeverages GroovynRuns with JUnit Runner

¨IDE¨CI

18

Spock Testing

Taxonomy of a Spec

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Spock TestingFirst Spec

Spock TestingTerms

nSpecification¨compare to TestCase or GroovyTestCase¨Instructs JUnit to run with Sputnik (JUnit runner)

nFields¨initialized for each “test”¨think “setup”¨not shared between feature methods

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Spock TestingMore Fields

nShared¨Setup once¨think setupSpec()

nstatics¨only use for constants

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Spock TestingFixture Methods

nbefore / after a featurenbefore / after a specnoptional

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Spock TestingFeature Methods

n“heart” of specnfour phases

¨setup the features fixture¨provide stimulus to system¨describes the response¨clean up

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Spock TestingBlocks

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given: preconditions, data fixtures

when: actions that trigger some outcomethen: makes assertions about outcome

expect: short alt to when & then

where: applies varied inputs

and: sub-divides other blocks

setup: alias for given

cleanup: post-conditions, housekeeping

Spock TestingCommon Blocks

nWhen / Then / WherenGiven / When / Then

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Spock TestingBlocks

nsetup

¨must be first¨must be the only¨no special semantics¨label is optional¨label given: is an alias

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Spock TestingWhen / Then Blocks

n used together¨possible to have many per feature

n then restrictions¨conditions¨exception conditions¨automatic asserts¨interactions¨variable defs

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Spock TestingConditions

nchecking for exceptions

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Spock TestingThrowing an Exception NOT!

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Spock TestingMocks and Expectations

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Spock TestingCleanup on Feature X

ncleanup block¨only followed by a where block¨no repeats

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Spock TestingWhere Blocks

¨last in a method¨no repeats¨used for data-driven features

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Spock TestingHelper Methods

¨either return a booleannor

¨assert34

Spock Testing

Specification Functionsand Spock.lang.*

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Spock Testing

nold()nthrown() / notThrownnwith {}

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Spock TestingSpock.lang.* Documentation

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@Title@Narrative @Issue@See@Subject

Spock TestingSpock.lang.* Ignoring Stuff

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@Requires @IgnoreIf@Ignore@IgnoreRest

Spock TestingReporting

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@Unroll

Spock TestingBuilt-in Extensions: AutoCleanup

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@AutoCleanup@AutoCleanup(‘dispose’)@AutoCleanup(quite=true)

Spock TestingBuilt-in Extensions: Timeout

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@Timeout@Timeout(10)@Timeout(value=10, unit=TimeUnit.MILLISECONDS)

Spock TestingBuilt-in Extensions: Stepwise

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@Stepwise

Spock Testing

Hamcrest

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Spock Testing

JUnit Rules

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Spock Testing

SpockConfig

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Spock TestingReferences

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nGetting Spock¨http://code.google.com/p/spock/

nSource from Presentation¨https://github.com/kensipe/spock-demos-nfjs

Spock Testing

n Closing and Q&A

¨Please fill out the session evaluation¨Ken Sipe

n ken.sipe@gmail.comn kensipe.blogspot.comn twitter: @kensipe

Summary