Bottom-Up Testing
Bottom-Up Testing is a software testing strategy that starts with testing the lowest-level units or modules (such as functions or classes) first, then progressively integrates and tests higher-level components. It relies on creating test drivers to simulate the behavior of higher-level modules that are not yet developed, allowing for early detection of defects in foundational code. This approach is particularly effective in large, complex systems where lower-level components form the building blocks for the entire application.
Developers should use Bottom-Up Testing when working on systems with well-defined, independent lower-level modules, as it enables early testing of core functionality before higher-level components are complete. It is ideal for projects where lower-level code is critical to system stability, such as in embedded systems, libraries, or applications with reusable components, as it helps identify issues at the foundation level, reducing integration risks later in development.