Differences between unit tests and integration tests

When writing automated tests, it’s important to understand the different levels of testing and what each one is intended to verify. Two common types are unit tests and integration tests, and while they may seem similar at first glance, they serve very different purposes and involve different levels of complexity:

• Complexity: Integration tests are usually more complex to set up compared to unit tests. This is because they require the preparation of multiple components or systems that must work together. Additionally, they require more resources, such as databases, external services, or realistic test environments. For this reason, its execution tends to be slower and more demanding, both in time and computational capacity. On the other hand, unit tests are much simpler, since they test a single component in isolation. This makes them quick to run and easy to configure, making them an ideal tool for detecting small...