if err != nil {
			if writeBody && !test.readBody {
				// This is an acceptable failure due to a possible TCP race:
				// We were still writing data and the server hung up on us. A TCP
				// implementation may send a RST if our request body data was known
				// to be lost, which may trigger our reads to fail.
				// See RFC 1122 page 88.
				t.Logf("On test %#v, acceptable error from ReadString: %v", test, err)

type ResponseWriter interface {
	// Header returns the header map that will be sent by
	// [ResponseWriter.WriteHeader]. The [Header] map also is the mechanism with which
	// [Handler] implementations can set HTTP trailers.
	//
	// Changing the header map after a call to [ResponseWriter.WriteHeader] (or
	// [ResponseWriter.Write]) has no effect unless the HTTP status code was of the

			if err := c.Close(); err != nil {
				base.Fatalf("go: failed to trim cache: %v", err)
			}
		}()
	}

	// Build list of all actions, assigning depth-first post-order priority.
	// The original implementation here was a true queue
	// (using a channel) but it had the effect of getting
	// distracted by low-level leaf actions to the detriment
	// of completing higher-level actions. The order of