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Building Tests

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Manage episode 237182639 series 1900125
Content provided by iteration podcast, John Jacob, and JP Sio - Web Developers. All podcast content including episodes, graphics, and podcast descriptions are uploaded and provided directly by iteration podcast, John Jacob, and JP Sio - Web Developers or their podcast platform partner. If you believe someone is using your copyrighted work without your permission, you can follow the process outlined here https://podcastplayer.com/legal.

Chapter 4 - Building Tests

To do refactoring properly, I need a solid suite of tests to spot my inevitable mistakes.

The Value of Self-Testing Code

  • make sure all tests are fully automatic and that they check their own results
  • a suite of tests is a powerful bug detector that decapitates the time it takes to find bugs

If you want to refactor, you have to write tests

A First Test

  • simplicity of feedback from tests. just dots
  • personally like verbose test output

Add Another Test

Testing should be risk driven; remember, I'm trying to find bugs, now or in the future. Therefore I don't test accessor methods that just read and write a field. They are so simple that I'm not likely to find a bug there.

My focus is to test areas that I'm most worried about going wrong.

Probing the Boundaries

  • Seeing what happens when things go wrong

Whenever I have a collection of something, ... I like to see what happens when it's empty

  • What happens when negative numbers are passed to a function that expects positive numbers? Division by zero?
    How do you probe boundaries?

Much More Than This

When you get a bug report, start by writing a unit test that exposes the bug


Picks

  • JP: Taking time off
  continue reading

78 episodes

Artwork

Building Tests

iteration

113 subscribers

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Manage episode 237182639 series 1900125
Content provided by iteration podcast, John Jacob, and JP Sio - Web Developers. All podcast content including episodes, graphics, and podcast descriptions are uploaded and provided directly by iteration podcast, John Jacob, and JP Sio - Web Developers or their podcast platform partner. If you believe someone is using your copyrighted work without your permission, you can follow the process outlined here https://podcastplayer.com/legal.

Chapter 4 - Building Tests

To do refactoring properly, I need a solid suite of tests to spot my inevitable mistakes.

The Value of Self-Testing Code

  • make sure all tests are fully automatic and that they check their own results
  • a suite of tests is a powerful bug detector that decapitates the time it takes to find bugs

If you want to refactor, you have to write tests

A First Test

  • simplicity of feedback from tests. just dots
  • personally like verbose test output

Add Another Test

Testing should be risk driven; remember, I'm trying to find bugs, now or in the future. Therefore I don't test accessor methods that just read and write a field. They are so simple that I'm not likely to find a bug there.

My focus is to test areas that I'm most worried about going wrong.

Probing the Boundaries

  • Seeing what happens when things go wrong

Whenever I have a collection of something, ... I like to see what happens when it's empty

  • What happens when negative numbers are passed to a function that expects positive numbers? Division by zero?
    How do you probe boundaries?

Much More Than This

When you get a bug report, start by writing a unit test that exposes the bug


Picks

  • JP: Taking time off
  continue reading

78 episodes

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