Characteristics of tests

Fast: It isn't uncommon for mature projects to have thousands of unit tests. Unit tests should take little time to run. Milliseconds.
Isolated: Unit tests are standalone, can be run in isolation, and have no dependencies on any outside factors such as a file system or database.
Repeatable: Running a unit test should be consistent with its results, that is, it always returns the same result if you don't change anything in between runs.
Self-Checking: The test should be able to automatically detect if it passed or failed without any human interaction.
Timely: Unit tests should be written close to when the code is written, ideally before or during the development process (TDD approach).

Last updated 8 months ago

Fast: It isn't uncommon for mature projects to have thousands of unit tests. Unit tests should take little time to run. Milliseconds.
Isolated: Unit tests are standalone, can be run in isolation, and have no dependencies on any outside factors such as a file system or database.
Repeatable: Running a unit test should be consistent with its results, that is, it always returns the same result if you don't change anything in between runs.
Self-Checking: The test should be able to automatically detect if it passed or failed without any human interaction.
Timely: Unit tests should be written close to when the code is written, ideally before or during the development process (TDD approach).

Last updated 8 months ago