Rename middleware/testing (#103)

Rename to test and name the toplevel tests dir to test for consitency.

middleware/test/responsewriter.go

@@ -0,0 +1,28 @@
+package test
+
+import (
+	"net"
+
+	"github.com/miekg/dns"
+)
+
+type ResponseWriter struct{}
+
+func (t *ResponseWriter) LocalAddr() net.Addr {
+	ip := net.ParseIP("127.0.0.1")
+	port := 53
+	return &net.UDPAddr{IP: ip, Port: port, Zone: ""}
+}
+
+func (t *ResponseWriter) RemoteAddr() net.Addr {
+	ip := net.ParseIP("10.240.0.1")
+	port := 40212
+	return &net.UDPAddr{IP: ip, Port: port, Zone: ""}
+}
+
+func (t *ResponseWriter) WriteMsg(m *dns.Msg) error     { return nil }
+func (t *ResponseWriter) Write(buf []byte) (int, error) { return len(buf), nil }
+func (t *ResponseWriter) Close() error                  { return nil }
+func (t *ResponseWriter) TsigStatus() error             { return nil }
+func (t *ResponseWriter) TsigTimersOnly(bool)           { return }
+func (t *ResponseWriter) Hijack()                       { return }