#gotochicago @thejayfields Tuesday, May 12, 15 @thejayfields JUnit - - PowerPoint PPT Presentation

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#gotochicago @thejayfields Tuesday, May 12, 15 @thejayfields JUnit - - PowerPoint PPT Presentation

May 15, 2023 321 likes •1.48k views

#gotochicago @thejayfields Tuesday, May 12, 15 @thejayfields JUnit version 4.11 ......... Tuesday, May 12, 15 @thejayfields JUnit version 4.11 .......................................................E.E.. Tuesday, May 12, 15 @thejayfields

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JUnit version 4.11 .........

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JUnit version 4.11 .......................................................E.E..

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JUnit version 4.11 .E.E.. There were 2 failures: 1) statement(CustomerTest)

  • rg.junit.ComparisonFailure: expected:<...or John

Godfather 4[ ]9.0 Amount owed is 9...> but was:<...or John Godfather 4[ ]9.0 Amount owed is 9...> 2) htmlStatement(CustomerTest)

  • rg.junit.ComparisonFailure: expected:<...</h1>

<p>Godfather 4[ ]9.0</p> <p>Amount ow...> but was:<...</h1> <p>Godfather 4[ ]9.0</p> <p>Amount ow...> FAILURES!!! Tests run: 4, Failures: 2

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JUnit version 4.11 .E.E.. There were 2 failures: 1) statement(CustomerTest)

  • rg.junit.ComparisonFailure: expected:<...or John

Godfather 4[ ]9.0 Amount owed is 9...> but was:<...or John Godfather 4[ ]9.0 Amount owed is 9...> 2) htmlStatement(CustomerTest)

  • rg.junit.ComparisonFailure: expected:<...</h1>

<p>Godfather 4[ ]9.0</p> <p>Amount ow...> but was:<...</h1> <p>Godfather 4[ ]9.0</p> <p>Amount ow...> FAILURES!!! Tests run: 4, Failures: 2

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  • 1. statement()

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  • 2. customer[]

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  • 3. Customer

Assignment

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  • 4. Digest setup

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  • 5. Object mother

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  • 6. OBJECT Mother

customer variations

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  • 7. expected

string building

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  • 8. rentalInfo()

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  • 9. rentalinfo

implemtation

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  • 10. find and

digest expstatement()

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why?

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we write tests we don’t need with time we don’t have to satisfy people we don’t like.

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motivators? enable refactoring, immediate feedback, and breaking a problem up into smaller pieces

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motivators? enable refactoring, immediate feedback, and breaking a problem up into smaller pieces

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motivators? enable refactoring, immediate feedback, and breaking a problem up into smaller pieces

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motivators? enable refactoring, immediate feedback, and breaking a problem up into smaller pieces

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motivators? enable refactoring, immediate feedback, and breaking a problem up into smaller pieces

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motivators? enable refactoring, immediate feedback, and breaking a problem up into smaller pieces

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To create a tiny universe where the software exists to do one thing and do it well.

  • - @delitescere

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To create a tiny universe where the software exists to do one thing and do it well.

  • - @delitescere

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DRY

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Suite / Fixture / Test

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Suite / Fixture / Test

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Testing unrelated customers

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Creating unrelated customers

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  • verextracting

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relevant data

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Dry Suites , dry locals, Else Damp

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  • ne: replace loop with

individual tests

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It’s only after we’ve duplicated everything that we’re free to dry anything

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two: expect literals

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three: inline setup

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Motivators

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validate the system feedback prevent regression

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code coverage

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enable refactoring

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enable refactoring

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document the system

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manager told you to

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tdd break up a problem improved design

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customer acceptance

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Any fool can write a test that helps them today. Good programmers write tests that help the entire team in the future.

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what can we do?

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This is your career and it’s ending one test suite run at a time

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def: Solitary Unit Test

  • 1. never cross boundaries
  • 2. the Class Under Test should be the
  • nly concrete class found in a test

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def: Solitary Unit Test

  • 1. never cross boundaries
  • 2. the Class Under Test should be the
  • nly concrete class found in a test

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def: Sociable Unit Test

  • 1. any unit test that isn’t solitary

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+ Sociable

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+ Sociable

  • solitary

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+ Sociable + Solitary

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Confidence

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isolation

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integration

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how else can I improve the test suite?

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  • ne assertion per test

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self destruction

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Our tests are failing us

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Poor SoluTion

  • r

Poor Solution

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Or?

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One Assertion per test

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wrapping up

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The tests you own end up owning you.

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Your tests are not special. They are not beautiful or unique

  • snowflakes. They’re the same

decaying text as every other test.

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more: http://wewut.com Thank You. Questions?

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