/*
 * Copyright 2017 The Netty Project
 *
 * The Netty Project licenses this file to you 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 io.netty.handler.codec.mqtt;

import static org.junit.Assert.assertNull;

import io.netty.util.CharsetUtil;
import org.junit.Test;

import java.util.Collections;

public class MqttConnectPayloadTest {

    @Test
    public void testNullWillMessage() throws Exception {
        String clientIdentifier = "clientIdentifier";
        String willTopic = "willTopic";
        byte[] willMessage = null;
        String userName = "userName";
        byte[] password = "password".getBytes(CharsetUtil.UTF_8);
        MqttConnectPayload mqttConnectPayload =
            new MqttConnectPayload(clientIdentifier, willTopic, willMessage, userName, password);

        assertNull(mqttConnectPayload.willMessageInBytes());
        assertNull(mqttConnectPayload.willMessage());
    }

    @Test
    public void testNullPassword() throws Exception {
        String clientIdentifier = "clientIdentifier";
        String willTopic = "willTopic";
        byte[] willMessage = "willMessage".getBytes(CharsetUtil.UTF_8);
        String userName = "userName";
        byte[] password = null;
        MqttConnectPayload mqttConnectPayload =
            new MqttConnectPayload(clientIdentifier, willTopic, willMessage, userName, password);

        assertNull(mqttConnectPayload.passwordInBytes());
        assertNull(mqttConnectPayload.password());
    }

    @Test
    public void testBuilderNullPassword() throws Exception {
        MqttMessageBuilders.ConnectBuilder builder = new MqttMessageBuilders.ConnectBuilder();
        builder.password((String) null);

        MqttConnectPayload mqttConnectPayload = builder.build().payload();

        assertNull(mqttConnectPayload.passwordInBytes());
        assertNull(mqttConnectPayload.password());

        builder = new MqttMessageBuilders.ConnectBuilder();
        builder.password((byte[]) null);

        mqttConnectPayload = builder.build().payload();

        assertNull(mqttConnectPayload.passwordInBytes());
        assertNull(mqttConnectPayload.password());
    }

    @Test
    public void testBuilderNullWillMessage() throws Exception {
        MqttMessageBuilders.ConnectBuilder builder = new MqttMessageBuilders.ConnectBuilder();
        builder.willMessage((String) null);

        MqttConnectPayload mqttConnectPayload = builder.build().payload();

        assertNull(mqttConnectPayload.willMessageInBytes());
        assertNull(mqttConnectPayload.willMessage());

        builder = new MqttMessageBuilders.ConnectBuilder();
        builder.willMessage((byte[]) null);

        mqttConnectPayload = builder.build().payload();

        assertNull(mqttConnectPayload.willMessageInBytes());
        assertNull(mqttConnectPayload.willMessage());
    }

    /* See https://github.com/netty/netty/pull/9202 */
    @Test
    public void testEmptyTopicsToString() {
        new MqttSubscribePayload(Collections.<MqttTopicSubscription>emptyList()).toString();
        new MqttUnsubscribePayload(Collections.<String>emptyList()).toString();
    }
}