Test Context Arrangement Recipebook

5 years know-how ofRSpec drivenRails app.development MOROHASHI Kyosuke (@moro)

Kyosuke MOROHASHI✓ http://twitter.com/moro✓ http://github.com/moro✓ Eiwa System Management, Inc.

http://gihyo.jp/news/report/01/rubykaigi2011/0001

aigi byK rice Ru l p cia off spe % 40http://tatsu-zine.com/books/cuke

able o vail -D A Ju nku igi @ yKa Rubhttp://amzn.to/rails3recipebook

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5 years know-how ofRSpec drivenRails app.development MOROHASHI Kyosuke (@moro)

Test ContextArrangement 3

I’ll talk about.✓What test should I write ﬁrst? ✓ Write model unit test.✓I began model test,but it’s difﬁcult to setup data!! ✓ Use multi strategies for multi types of data.✓It seems good but less DRY. Is there any idea? ✓ Share your testing context.

m le obPr What test should I write ﬁrst?

on ti luSo Write Model unit test.

People saySkinny Controllers Fat Models

It’s clear what happening.http://ﬂic.kr/p/5tk4by

#64 2011-07-18 12:00 http://twitter.com/railstokyo

aigi byK rice Ru l p cia off spe % 40 Use Cucumber (or other end-to-end testing) to cover controller, views and more.http://tatsu-zine.com/books/cuke

Model unit test

m le obPr Began model test, but it’s difﬁcult to setup data!!

events studentscourses lessons registrations rooms periods

Course-1 Course-2Period-1 Lesson-1-1 Lesson-2-1Period-2 Lesson-1-2 Lesson-2-2Period-3 Lesson-1-3 Lesson-2-3Period-4 Lesson-1-4 Lesson-2-4Period-5 Lesson-1-5 Lesson-2-5 registration

on ti lu Use multiSo strategies for multi types of data.

✓ 3 types of data✓ 3 strategies

✓ Master data✓ Resource data✓ Event data

Mastar data✓ Created/updated rarely. ✓e.g. rooms / periods.✓ Less dependencies to others.✓ Maintained by or so.

Resource data✓ Mainly created/updated data.✓ Users themselves maintains this type of data.

Event data✓ Represent relationship between resources.✓ Used for ‘s through table in Rails.

✓ 3 types of data✓ 3 strategies

✓ Fixture✓ Fixture replacement✓ block

Fixturehttp://ﬂic.kr/p/5NfjKM

✓ good speed to be loaded.✓ less maintainability.✓ less ﬂexibility.

Fixture Replacementhttp://fabricationgem.org/

✓ ﬂexible.✓ powerful but difﬁcult to use correctly.✓ slow to be loaded.

Which should we userails-ﬁxture or ﬁxturereplacement?Use them both whichsuitable for the data.

✓ each run per test.✓ same speed with real data persistence.✓ edit each of them to maintain.

flexibility maintain- speed in test ability good for Master fixture best wrong wrong data fixture Resource wrong good bestreplacements data good for each Event before() good best wrong for all data

events students Resourcecourses lessons registrations Event rooms periods Master

on ti lu Use multiSo strategies for multi types of data.

✓ ﬁxture✓ ﬁxture replacement✓ blockUse them all whichsuitable for the data.

m le It seems good obPr but less DRY. Is there any idea?

Students Course CountPeriod-1 Lesson-1-1 2Period-2 Lesson-1-2 3Period-3 Lesson-1-3 3Period-4 Lesson-1-4 3Period-5 Lesson-1-5 2

on ti luSo Share your testing context.

https://github.com/rspec

✓ naming each✓ naming them

“Generates a method whosereturn value is memoizedafter the ﬁrst call.

✓ name each focusing object.✓ Build strategy doesn’t matter.

✓ naming each✓ naming them

✓ RSpec’s✓✓

A student subscribes a course event lesson-1-1 lesson-1-1course-1 lesson-1-1 lesson-1-1 lesson-1-1 registrations registrations registrations registrations Alice <student> room-1 room-1 period-1 period-1 room-1 room-1 period-1 period-1 room-1 period-1 course-2 lesson-2-1 lesson-2-1 lesson-2-1 lesson-2-1 lesson-2-1

✓ naming each w/✓ naming them w/Express your intentionclearly and reducetiredness to add new test.

on ti luSo Share your testing context.

Conclusion

I’ve talked about.✓What test should I write ﬁrst? ✓ Write model unit test.✓I began model test,but it’s difﬁcult to setup data!! ✓ Use multi strategies for multi types of data.✓It seems good but less DRY. Is there any idea? ✓ Share your testing context.

✓ ﬁxture✓ ﬁxture replacement✓ blockUse them all whichsuitable for the data.

✓ naming each w/✓ naming them w/Express your intentionclearly and reducetiredness to add new test.

May a testbe with you.

http://www.rubyworld-conf.org/

May a testbe with you.

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Test Context Arrangement Recipebook

by Kyosuke MOROHASHI

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