// type *Server.
	ServerContextKey = &contextKey{"http-server"}

	// LocalAddrContextKey is a context key. It can be used in
	// HTTP handlers with Context.Value to access the local
	// address the connection arrived on.
	// The associated value will be of type net.Addr.
	LocalAddrContextKey = &contextKey{"local-addr"}
)

// A conn represents the server side of an HTTP connection.

}
func testServerContext_LocalAddrContextKey(t *testing.T, mode testMode) {
	ch := make(chan any, 1)
	cst := newClientServerTest(t, mode, HandlerFunc(func(w ResponseWriter, r *Request) {
		ch <- r.Context().Value(LocalAddrContextKey)
	}))
	if _, err := cst.c.Head(cst.ts.URL); err != nil {
		t.Fatal(err)
	}

	host := cst.ts.Listener.Addr().String()
	got := <-ch
	if addr, ok := got.(net.Addr); !ok {