Chapter 9. Testing and benchmarking
In this chapter
- Writing unit tests to validate your code
- Mocking HTTP-based requests and responses using httptest
- Documenting your packages with example code
- Examining performance with benchmarks
Testing your code is not something that you should wait to do until after you’re finished developing your program. With Go’s testing framework, unit testing and benchmarking can happen during the development process. Just like the go build command, there’s a go test command to execute explicit test code that you write. All you need to do is follow a few guidelines, and you can integrate tests into your project and continuous integration systems seamlessly.
A unit test is a function that tests a specific piece or set of code from a package or program. The job of the test is to determine whether the code in question is working as expected for a given scenario. One scenario may be a positive-path test, where the test is making sure the normal execution of the code doesn’t produce an error. This could be a test that validates that the code can insert a job record into the database successfully.