Functional and non-functional testing

We briefly touched upon the topic of non-functional testing in Chapter 1, Getting to Grips with Test-Driven Development. Up until now, we have tabled this important type of testing and focused on verifying the various functional aspects, while exploring the popular testing libraries of testify, ginkgo, and GoDog. Let’s now explore how to implement a few of the most important non-functional tests.

Figure 8.1 depicts the main types of non-functional tests:

Figure 8.1 – Types of performance and correctness non-functional testing

The types of tests are divided between performance tests and usability tests. They verify the following aspects of our systems:

1. Load testing simulates user demand on our system. These tests simulate expected demand and overload conditions to identify bottlenecks or performance issues.
2. Stress testing simulates user demand under extreme conditions on our system. These tests...