fast unit tests for eclipse plugins

FAST UNITS TESTS FOR ECLIPSE PLUGINS Possible architectures and available tooling

Aurélien PupierSenior Software Engineer9th June 2016@apupier

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Response Time Limits

0 5 10 15 20 25 30 35

s

JUnit Plugin with Workbench

JUnit Plugin Headless

JUnit

user's flow of thought broken

1 Sec

lost the user's attention

10 Sec

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Objective

Stay Focused

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In our case...

Fast feedbackfrom (unit) tests in IDE

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Time to launch Tests

0 5 10 15 20 25 30 35

s

JUnit Plugin with Workbench

JUnit Plugin Headless

JUnit

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Plain JUnit Tests for plugins

Several possibilitiesNo consensus

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Architecture possibilities

src

src/test/java

src

src/test/java

src/test/javasrc

src src/test/java

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User Library inside plugin

src

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User Library inside plugin

src

src/test/java

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User Library inside plugin

● Clean Runtime

● Small tests

● Build time

● Fragment test

● No third-party:

–

–

– Your test toolkit

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Optional dependency inside plugin

src

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Optional dependency inside plugin

src

src/test/java

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Optional dependency inside plugin

● Third-parties:

–

–

– Your test toolkit● RCP application not

planned to be extended by third-parties

● Pollute runtime!

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Fragment

src

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Fragment

src/test/javasrc

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Fragment

● Clean runtime

● Third-parties:

–

–

– Your test toolkit● Most powerful with

clean runtime

● > Built-time

● Repository Complexity

● Test fragments

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Test plugin

src

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Test plugin

src src/test/java

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Test plugin

● Third-parties:

–

–

– Your test toolkit● Single plugin for

integration tests

● Pollute runtime!

● > Built-time

● Repository Complexity

● Package scoped

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Architecture possibilities

src

src/test/java

src

src/test/java

src/test/javasrc

src src/test/java

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All tests are important!

We talked here

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Tooling demo

https://github.com/apupier/EclipsePlugins-Testing

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Going further

● Test classpath supported by PDE and Tycho?

● Pre-mocked E4 Context?

● MoreUnit automatic configuration support?

● Fast Integration/UI tests continuous feedback?

Go Continuous Test

@apupier

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References

● https://rcpquickstart.wordpress.com/2007/06/20/unit-testing-plug-ins-with-fragments/

● https://resheim.net/2014/12/unit-testing-eclipse-rcp-applications.html

● https://www.nngroup.com/articles/response-times-3-important-limits/

● http://www.commitstrip.com/en/2016/03/15/how-to-optimise-your-time-as-a-coder/