Description: Upstream Testing is an approach within test-driven development that focuses on validating the requirements and functionalities of software in the early stages of the development process. These tests are conducted before the integration of system components, allowing for the identification and correction of errors at early stages, thus minimizing development costs and time. This type of testing is based on the premise that it is more efficient to detect and resolve issues in the early phases when changes are less costly to implement. Upstream Testing is characterized by its focus on system functionality from the end-user’s perspective, ensuring that the software meets customer expectations and needs. This method not only improves the quality of the final product but also fosters closer collaboration between development teams and stakeholders, as a clear understanding of requirements is needed from the project’s outset. In summary, Upstream Testing is an essential tool in agile development and in the implementation of test-driven development methodologies, contributing to the creation of more robust software aligned with user expectations.
