okhttp3.TestUtil Maven / Gradle / Ivy
/*
* Copyright (C) 2018 Square, 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.
*/
package okhttp3;
import java.net.InetAddress;
import java.net.InetSocketAddress;
import java.net.UnknownHostException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import okhttp3.internal.http2.Header;
public final class TestUtil {
public static final InetSocketAddress UNREACHABLE_ADDRESS
= new InetSocketAddress("198.51.100.1", 8080);
/**
* A network that resolves only one IP address per host. Use this when testing route selection
* fallbacks to prevent the host machine's various IP addresses from interfering.
*/
private static final Dns SINGLE_INET_ADDRESS_DNS = new Dns() {
@Override public List lookup(String hostname) throws UnknownHostException {
List addresses = Dns.SYSTEM.lookup(hostname);
return Collections.singletonList(addresses.get(0));
}
};
private TestUtil() {
}
private static final ConnectionPool connectionPool = new ConnectionPool();
private static final Dispatcher dispatcher = new Dispatcher();
/**
* Returns an OkHttpClient for all tests to use as a starting point.
*
* The shared instance allows all tests to share a single connection pool, which prevents idle
* connections from consuming unnecessary resources while connections wait to be evicted.
*
*
This client is also configured to be slightly more deterministic, returning a single IP
* address for all hosts, regardless of the actual number of IP addresses reported by DNS.
*/
public static OkHttpClient defaultClient() {
return new OkHttpClient.Builder()
.connectionPool(connectionPool)
.dispatcher(dispatcher)
.dns(SINGLE_INET_ADDRESS_DNS) // Prevent unexpected fallback addresses.
.build();
}
public static List headerEntries(String... elements) {
List result = new ArrayList<>(elements.length / 2);
for (int i = 0; i < elements.length; i += 2) {
result.add(new Header(elements[i], elements[i + 1]));
}
return result;
}
public static String repeat(char c, int count) {
char[] array = new char[count];
Arrays.fill(array, c);
return new String(array);
}
/**
* See FinalizationTester for discussion on how to best trigger GC in tests.
* https://android.googlesource.com/platform/libcore/+/master/support/src/test/java/libcore/
* java/lang/ref/FinalizationTester.java
*/
public static void awaitGarbageCollection() throws Exception {
Runtime.getRuntime().gc();
Thread.sleep(100);
System.runFinalization();
}
}