95 lines
3.6 KiB
Java
95 lines
3.6 KiB
Java
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/*
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* Copyright 2017 The Netty Project
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*
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* The Netty Project licenses this file to you under the Apache License,
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* version 2.0 (the "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*/
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package io.netty.resolver.dns;
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import io.netty.util.CharsetUtil;
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import org.junit.Rule;
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import org.junit.Test;
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import org.junit.rules.TemporaryFolder;
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import java.io.File;
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import java.io.FileOutputStream;
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import java.io.IOException;
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import java.io.OutputStream;
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import java.net.InetSocketAddress;
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import static org.junit.Assert.assertEquals;
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public class UnixResolverDnsServerAddressStreamProviderTest {
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@Rule
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public final TemporaryFolder folder = new TemporaryFolder();
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@Test
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public void defaultLookupShouldReturnResultsIfOnlySingleFileSpecified() throws Exception {
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File f = buildFile("domain linecorp.local\n" +
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"nameserver 127.0.0.2\n" +
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"nameserver 127.0.0.3\n");
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UnixResolverDnsServerAddressStreamProvider p =
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new UnixResolverDnsServerAddressStreamProvider(f, null);
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DnsServerAddressStream stream = p.nameServerAddressStream("somehost");
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assertHostNameEquals("127.0.0.2", stream.next());
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assertHostNameEquals("127.0.0.3", stream.next());
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}
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@Test
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public void defaultReturnedWhenNoBetterMatch() throws Exception {
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File f = buildFile("domain linecorp.local\n" +
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"nameserver 127.0.0.2\n" +
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"nameserver 127.0.0.3\n");
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File f2 = buildFile("domain squarecorp.local\n" +
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"nameserver 127.0.0.4\n" +
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"nameserver 127.0.0.5\n");
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UnixResolverDnsServerAddressStreamProvider p =
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new UnixResolverDnsServerAddressStreamProvider(f, f2);
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DnsServerAddressStream stream = p.nameServerAddressStream("somehost");
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assertHostNameEquals("127.0.0.2", stream.next());
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assertHostNameEquals("127.0.0.3", stream.next());
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}
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@Test
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public void moreRefinedSelectionReturnedWhenMatch() throws Exception {
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File f = buildFile("domain linecorp.local\n" +
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"nameserver 127.0.0.2\n" +
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"nameserver 127.0.0.3\n");
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File f2 = buildFile("domain dc1.linecorp.local\n" +
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"nameserver 127.0.0.4\n" +
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"nameserver 127.0.0.5\n");
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UnixResolverDnsServerAddressStreamProvider p =
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new UnixResolverDnsServerAddressStreamProvider(f, f2);
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DnsServerAddressStream stream = p.nameServerAddressStream("myhost.dc1.linecorp.local");
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assertHostNameEquals("127.0.0.4", stream.next());
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assertHostNameEquals("127.0.0.5", stream.next());
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}
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private File buildFile(String contents) throws IOException {
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File f = folder.newFile();
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OutputStream out = new FileOutputStream(f);
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try {
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out.write(contents.getBytes(CharsetUtil.UTF_8));
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} finally {
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out.close();
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}
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return f;
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}
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private static void assertHostNameEquals(String expectedHostname, InetSocketAddress next) {
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assertEquals("unexpected hostname: " + next, expectedHostname, next.getHostName());
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}
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}
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