Can you explain what is meant by component testing in software development?

Component testing is a type of unit testing where an individual component or module of a program is tested in isolation from the rest of the system. The goal is to ensure that the specific component functions correctly and meets the requirements. Typically, components are tested using special test data and mocks to eliminate the influence of external dependencies.

For example, if you have a function that calculates the total order amount, a component test will verify that it correctly computes the total with different input data, without accessing a database or other services.