packet

lib/message/unsubscribe_test.go

@@ -0,0 +1,155 @@
+// Copyright (c) 2014 The SurgeMQ Authors. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package message
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestUnsubscribeMessageFields(t *testing.T) {
+	msg := NewUnsubscribeMessage()
+
+	msg.SetPacketId(100)
+	require.Equal(t, 100, int(msg.PacketId()), "Error setting packet ID.")
+
+	msg.AddTopic([]byte("/a/b/#/c"))
+	require.Equal(t, 1, len(msg.Topics()), "Error adding topic.")
+
+	msg.AddTopic([]byte("/a/b/#/c"))
+	require.Equal(t, 1, len(msg.Topics()), "Error adding duplicate topic.")
+
+	msg.RemoveTopic([]byte("/a/b/#/c"))
+	require.False(t, msg.TopicExists([]byte("/a/b/#/c")), "Topic should not exist.")
+
+	require.False(t, msg.TopicExists([]byte("a/b")), "Topic should not exist.")
+
+	msg.RemoveTopic([]byte("/a/b/#/c"))
+	require.False(t, msg.TopicExists([]byte("/a/b/#/c")), "Topic should not exist.")
+}
+
+func TestUnsubscribeMessageDecode(t *testing.T) {
+	msgBytes := []byte{
+		byte(UNSUBSCRIBE<<4) | 2,
+		33,
+		0, // packet ID MSB (0)
+		7, // packet ID LSB (7)
+		0, // topic name MSB (0)
+		7, // topic name LSB (7)
+		's', 'u', 'r', 'g', 'e', 'm', 'q',
+		0, // topic name MSB (0)
+		8, // topic name LSB (8)
+		'/', 'a', '/', 'b', '/', '#', '/', 'c',
+		0,  // topic name MSB (0)
+		10, // topic name LSB (10)
+		'/', 'a', '/', 'b', '/', '#', '/', 'c', 'd', 'd',
+	}
+
+	msg := NewUnsubscribeMessage()
+	n, err := msg.Decode(msgBytes)
+
+	require.NoError(t, err, "Error decoding message.")
+	require.Equal(t, len(msgBytes), n, "Error decoding message.")
+	require.Equal(t, UNSUBSCRIBE, msg.Type(), "Error decoding message.")
+	require.Equal(t, 3, len(msg.Topics()), "Error decoding topics.")
+	require.True(t, msg.TopicExists([]byte("surgemq")), "Topic 'surgemq' should exist.")
+	require.True(t, msg.TopicExists([]byte("/a/b/#/c")), "Topic '/a/b/#/c' should exist.")
+	require.True(t, msg.TopicExists([]byte("/a/b/#/cdd")), "Topic '/a/b/#/c' should exist.")
+}
+
+// test empty topic list
+func TestUnsubscribeMessageDecode2(t *testing.T) {
+	msgBytes := []byte{
+		byte(UNSUBSCRIBE<<4) | 2,
+		2,
+		0, // packet ID MSB (0)
+		7, // packet ID LSB (7)
+	}
+
+	msg := NewUnsubscribeMessage()
+	_, err := msg.Decode(msgBytes)
+
+	require.Error(t, err)
+}
+
+func TestUnsubscribeMessageEncode(t *testing.T) {
+	msgBytes := []byte{
+		byte(UNSUBSCRIBE<<4) | 2,
+		33,
+		0, // packet ID MSB (0)
+		7, // packet ID LSB (7)
+		0, // topic name MSB (0)
+		7, // topic name LSB (7)
+		's', 'u', 'r', 'g', 'e', 'm', 'q',
+		0, // topic name MSB (0)
+		8, // topic name LSB (8)
+		'/', 'a', '/', 'b', '/', '#', '/', 'c',
+		0,  // topic name MSB (0)
+		10, // topic name LSB (10)
+		'/', 'a', '/', 'b', '/', '#', '/', 'c', 'd', 'd',
+	}
+
+	msg := NewUnsubscribeMessage()
+	msg.SetPacketId(7)
+	msg.AddTopic([]byte("surgemq"))
+	msg.AddTopic([]byte("/a/b/#/c"))
+	msg.AddTopic([]byte("/a/b/#/cdd"))
+
+	dst := make([]byte, 100)
+	n, err := msg.Encode(dst)
+
+	require.NoError(t, err, "Error decoding message.")
+	require.Equal(t, len(msgBytes), n, "Error decoding message.")
+	require.Equal(t, msgBytes, dst[:n], "Error decoding message.")
+}
+
+// test to ensure encoding and decoding are the same
+// decode, encode, and decode again
+func TestUnsubscribeDecodeEncodeEquiv(t *testing.T) {
+	msgBytes := []byte{
+		byte(UNSUBSCRIBE<<4) | 2,
+		33,
+		0, // packet ID MSB (0)
+		7, // packet ID LSB (7)
+		0, // topic name MSB (0)
+		7, // topic name LSB (7)
+		's', 'u', 'r', 'g', 'e', 'm', 'q',
+		0, // topic name MSB (0)
+		8, // topic name LSB (8)
+		'/', 'a', '/', 'b', '/', '#', '/', 'c',
+		0,  // topic name MSB (0)
+		10, // topic name LSB (10)
+		'/', 'a', '/', 'b', '/', '#', '/', 'c', 'd', 'd',
+	}
+
+	msg := NewUnsubscribeMessage()
+	n, err := msg.Decode(msgBytes)
+
+	require.NoError(t, err, "Error decoding message.")
+	require.Equal(t, len(msgBytes), n, "Error decoding message.")
+
+	dst := make([]byte, 100)
+	n2, err := msg.Encode(dst)
+
+	require.NoError(t, err, "Error decoding message.")
+	require.Equal(t, len(msgBytes), n2, "Error decoding message.")
+	require.Equal(t, msgBytes, dst[:n2], "Error decoding message.")
+
+	n3, err := msg.Decode(dst)
+
+	require.NoError(t, err, "Error decoding message.")
+	require.Equal(t, len(msgBytes), n3, "Error decoding message.")
+}