Considering the testing pyramid
Over the years, more and more types of software testing have been identified and added to the standard repertoire of software projects and testing professionals such as quality assurance engineers. A powerful tool to categorize and order the most common types of software testing is the testing pyramid.
The testing pyramid arranges the different types of testing by their visibility and effort. Higher layers of the pyramid require more effort but have greater visibility. Tests that are placed in the lower layers of the pyramid should be written a lot more – after all, these are the foundations of the pyramid.
An illustration of the testing pyramid is shown in Figure 7.1. The basis of the testing pyramid is formed by unit tests, which provide enough reliability to run components and integration tests on top of them later. Finally, UI tests (quite often referred to as end-to-end tests) can be run to verify that the solution works for end users...
