Your software maintenance cost increases with every feature added, until eventually too many pieces of the system are affected. How do you know something isn’t broken? We stand behind our code with quality assured test automation. We strive for clean, testable code by following TDD methodologies for unit and integration tests. We build software to last which may require a larger time investment up front, but beats the alternative of having to rewrite your software later. Similar to security or monitoring, tests have different levels. A combination of unit, load, and end-to-end tests is more important than any individual layer by itself.
Unit tests delay the initial code push, but you get that time back from quality and less defects. It’s important for the person writing the code to write tests because they are the most familiar with the requirements. Some major benefits of unit testing are:
Performance/Load tests let you know the boundaries of your system. These tests help answer the questions:
How large can our system scale before we have to add hardware?
Can I handle a spike in user traffic?
How many calls can my API handle?
The worst time to find out the answer to any of these questions is ‘no’ is when it’s happening because at that point you are losing business.
End-to-end tests are the most complete tests of all. They test what the user is going to experience and ensure user expectations are met. A healthy system is a system that will last.