/*************************GO-LICENSE-START*********************************
 * Copyright 2014 ThoughtWorks, Inc.
 *
 * 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.
 *************************GO-LICENSE-END***********************************/

package com.thoughtworks.go.util;

import java.net.InetAddress;
import java.net.UnknownHostException;

import org.junit.Test;

import static org.hamcrest.Matchers.is;
import static org.junit.Assert.assertThat;

public class SystemUtilTest {
    @Test
    public void shouldReturnFalseIfAddressIsNotLocalFilteredByHostname() throws UnknownHostException {
        assertThat("Localhost (google.com with ip 127.0.0.1) should not be a local address.", SystemUtil.isLocalhost("google.com", "127.0.0.1"), is(false));
    }

    @Test
    public void shouldDetermineIfAddressIsLocal() throws UnknownHostException {
        InetAddress local = InetAddress.getLocalHost();
        assertThat("Localhost (" + local.getHostName() + ") should be a local address.", SystemUtil.isLocalhost(local.getHostAddress()), is(true));
    }

    @Test
    public void shouldReturnFalseIfAddressIsNotLocal() throws UnknownHostException {
        String hostName = "hostThatNeverExists";
        assertThat("Localhost (" + hostName + ") should not be a local address.", SystemUtil.isLocalhost("8.8.8.8"), is(false));
    }

    @Test
    public void shouldReturnFalseIfPortIsNotReachableOnLocalhost() throws Exception {
        assertThat(SystemUtil.isLocalhostReachable(9876), is(false));
    }
}

/*************************GO-LICENSE-START*********************************
 * Copyright 2014 ThoughtWorks, Inc.
 *
 * 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.
 *************************GO-LICENSE-END***********************************/

package com.thoughtworks.go.util;

import java.net.InetAddress;
import java.net.UnknownHostException;

import org.junit.Test;

import static org.hamcrest.Matchers.is;
import static org.junit.Assert.assertThat;

public class SystemUtilTest {
    @Test
    public void shouldReturnFalseIfAddressIsNotLocalFilteredByHostname() throws UnknownHostException {
        assertThat("Localhost (google.com with ip 127.0.0.1) should not be a local address.", SystemUtil.isLocalhost("google.com", "127.0.0.1"), is(false));
    }

    @Test
    public void shouldDetermineIfAddressIsLocal() throws UnknownHostException {
        InetAddress local;

        try {
            local = InetAddress.getLocalHost();
        }
        catch (UnknownHostException e) {
            local = InetAddress.getByName("localhost");
        }

        assertThat("Localhost (" + local.getHostName() + ") should be a local address.", SystemUtil.isLocalhost(local.getHostAddress()), is(true));
    }

    @Test
    public void shouldReturnFalseIfAddressIsNotLocal() throws UnknownHostException {
        String hostName = "hostThatNeverExists";
        assertThat("Localhost (" + hostName + ") should not be a local address.", SystemUtil.isLocalhost("8.8.8.8"), is(false));
    }

    @Test
    public void shouldReturnFalseIfPortIsNotReachableOnLocalhost() throws Exception {
        assertThat(SystemUtil.isLocalhostReachable(9876), is(false));
    }
}

Handle UnknownHostException