Testing Go HTTP Handlers with httptest
HTTP handlers are one of the easiest parts of a Go service to test well. You usually do not need to bind a real network port, start the entire application, or depend on an external test framework.
Go’s standard library provides net/http/httptest, which can construct HTTP requests, capture handler responses, and even start temporary HTTP servers when a real client-server round trip matters.
This guide builds a small JSON endpoint and tests it at several useful levels.
