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Spock & Geb:
Clear and comprehensible tests!
27.06.2017
Ralf D. Müller,
Tobias Kraft
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My source code is
covered by
automated tests ☺
No Errors, but what has been
tested?
I have to test manually!
Our system
contains an
expensive bug!
Why hasn‘t it been
found before?
No
Errors
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Functional Testing
with Geb
Integration of
the Business
Department
Comprehensible
Reporting
Spock – short and
clear
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JUnit vs. Spock
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Spock - Overview
● BDD-Framework for Tests and Specs
● Groovy as basis
● DSL (Domain Specific Language)
● General Testing for JVM-Languages
● IDE-Support (Junit)
● Version 1.1 since May 2017
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Clear Structure of Test-Code
n-times
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Data-Driven-Testing
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Extensions via Annotations
@Ignore("Not yet implemented")
@IgnoreRest
@IgnoreIf({ properties."os.name" ==~ /Linux.*/) })
@Timeout
@FailsWidth
@Requires({ env.containsKey(„DMS_ENABLED") })
@RestoreSystemProperties
@Issue("http://jira.exensio.de/browse/GM-19")
@See("http://ldaley.com/post/6570075743/")
@Title("a readable title")
@Narrative("a beautiful description for a report")
Documentation
Ignore
and even more…
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What else makes Spock special?
● Interaction Based Testing
● Stubs, Mocks und Spies
● Exceptions
● old method
● Hamcrest Matchers
when:
myList.add('foo')
then:
myList.size() == old(myList.size()) + 1
then:
def e = thrown(IllegalArgumentException)
e.getMessage().startsWith("No tagCategory")
expect:
2.9d closeTo(3, 0.5)
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the automated tests are
now readable by the
business people…
No Errors? But what has been
tested? Can‘t I just specify
what to test?!
No
Errors
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Functional Testing
with Geb
Integration of
the Business
Department
Comprehensible
Reporting
Spock – short and
clear
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Business specifies Tests
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Business specifies Tests
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Specification is turned into scaffolded Tests
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Screenshot?
Click a Link?
Fill out Forms?
No
Errors
No Errors? But what has been
tested? Can‘t I just specify
what to test?!
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Functional Testing
with Geb
Integration of
the Business
Department
Comprehensible
Reporting
Spock – short and
clear
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Geb - Overview
● Webtesting and Screen-Scraping
● DSL based on Groovy
● jQuery like CSS Selectors
● Uses same WebDriver as Selenium
● IDE-Support
● Integration with Spock, TestNG or Junit (or even Cucumber and JBehave?)
● Version 1.1.1
● http://gebish.org/
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Spock with Geb = Dream-Team
Geb Testing
Adapter
WebDriver
Spock
Geb
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HTML DOM-Selection with a JQuery-like Syntax
Examples
$("div", 2)
$("td.odd", 0..2)*.text()
$("img", alt: "Titel")
$("img", alt: "Titel").previous()
$("div#heading").find("div", 3)
$("div", text: iStartsWith ("groovy"))
$("form").find("input", name: "speaker").value()
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Page Objects – to create modular tests
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I turned the business
specs into automated
Tests! (yeah!)
Still just
No Errors
No Errors? But what has been
tested? Can‘t I just specify
what to test?!
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Functional Testing
with Geb
Integration of
the Business
Department
Comprehensible
Reporting
Spock – short and
clear
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Problems of Test-Reports
● Tests just fail or succeed
● Power-Assertions are very supportive:
● 3 Report-Engines available for Spock
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Standard Gradle Reports
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Standard Gradle Reports
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Spock 1.0-SNAPSHOT Report
http://spockframework.github.io/spock/sampleReports/Ninja%20Commander.html
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Spock-Reports Plugin by Renato Athaydes
https://github.com/renatoathaydes/spock-reports
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But what has been tested?
● Errors are hints that tests are not faked
● But otherwise, the reports just copy the specification
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Solution – Geb Screenshots
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Solution – Spock Reports with Geb Screenshots
https://github.com/rdmueller/etka15
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Solution – Spock Reports with Geb Screenshots
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• Less manual
testing
• Comprehensible
Tests
Summary
• Maintainable Tests
with Spock and Geb
• Business helps to
create Tests
• Better
Quality
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Any Questions?
Thank you for
your attention! @tokraft
[email protected]
@RalfDMueller
[email protected]
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References
● Spock und Geb: Übersichtlich und nachvollziehbar Testen für alle!
Vortrag, Beispiele Source Code
http://rdmueller.github.io/etka15/
● Teil 1 : Mit Mr. Spock beim Testeinsatz, Javamagazin (12/2014)
Teil 2 : Mr. Spock ruft Geb, Javamagazin (01/2015)
http://www.exensio.de/articles/