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3.1Structuring Pipeline Stages Around the Test Pyramid

Not all tests belong at the same stage. The testing pyramid dictates not just what kinds of tests you write, but when they run in your pipeline. Structure your pipeline to provide fast feedback first and expensive validation later.

                    /\
                   /  \
                  / E2E \          Minutes   | On merge to main
                 /--------\
                /          \
               / Integration \     Minutes   | On pull request
              /--------------\
             /                \
            /    Unit Tests    \   Seconds   | On every push
           /--------------------\