https://codeinstances.com/tags/upgrades/ Recent content in Upgrades on CodeInstances.com Hugo en-us Sun, 18 Oct 2026 00:00:00 +0000 https://codeinstances.com/how-to-upgrade-a-dependency-with-codeinstances-replaying-real-runs/ Sun, 18 Oct 2026 00:00:00 +0000 https://codeinstances.com/how-to-upgrade-a-dependency-with-codeinstances-replaying-real-runs/ <p>You need to bump something underneath your program. A new major version of the HTTP client library, a vendor&rsquo;s SDK, or the Go toolchain itself. The changelog is long. Your unit tests pass, but they use mocks written two years ago against the old behaviour, so passing doesn&rsquo;t tell you much. What you&rsquo;d like to know is simple: does the program still do the same thing on real work?</p> <p>Real runs answer that. Before the upgrade, record a handful of runs of the current build doing real work, against the real services:</p>