FAST UNITS TESTS FOR ECLIPSE PLUGINS Possible architectures and available tooling

Aurélien PupierSenior Software Engineer9th June 2016@apupier

2 / 26

What happened?

●h

ttp

://w

ww

.co

mm

itstr

ip.c

om

/en

/20

16

/03

/15

/ho

w-t

o-o

ptim

ise

-yo

ur-

time

-as-

a-c

od

er/

3 / 26

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

4 / 26

Objective

Stay Focused

5 / 26

In our case...

Fast feedbackfrom (unit) tests in IDE

6 / 26

Time to launch Tests

0 5 10 15 20 25 30 35

s

JUnit Plugin with Workbench

JUnit Plugin Headless

JUnit

7 / 26

Plain JUnit Tests for plugins

Several possibilitiesNo consensus

8 / 26

Architecture possibilities

src

src/test/java

src

src/test/java

src/test/javasrc

src src/test/java

9 / 26

User Library inside plugin

src

11 / 26

User Library inside plugin

src

src/test/java

12 / 26

User Library inside plugin

● Clean Runtime

● Small tests

● Build time

● Fragment test

● No third-party:

–

–

– Your test toolkit

13 / 26

Optional dependency inside plugin

src

14 / 26

Optional dependency inside plugin

src

src/test/java

15 / 26

Optional dependency inside plugin

● Third-parties:

–

–

– Your test toolkit● RCP application not

planned to be extended by third-parties

● Pollute runtime!

16 / 26

Fragment

src

17 / 26

Fragment

src/test/javasrc

18 / 26

Fragment

● Clean runtime

● Third-parties:

–

–

– Your test toolkit● Most powerful with

clean runtime

● > Built-time

● Repository Complexity

● Test fragments

19 / 26

Test plugin

src

20 / 26

Test plugin

src src/test/java

21 / 26

Test plugin

● Third-parties:

–

–

– Your test toolkit● Single plugin for

integration tests

● Pollute runtime!

● > Built-time

● Repository Complexity

● Package scoped

22 / 26

Architecture possibilities

src

src/test/java

src

src/test/java

src/test/javasrc

src src/test/java

23 / 26

All tests are important!

We talked here

25 / 26

Tooling demo

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

26 / 26

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

28 / 26

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/