/*
* Copyright 2010-2017 Amazon.com, Inc. or its affiliates. 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.
* A copy of the License is located at
*
* http://aws.amazon.com/apache2.0
*
* or in the "license" file accompanying this file. This file 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 com.amazonaws.auth;
import static org.junit.Assert.assertEquals;
import java.util.Arrays;
import org.junit.Test;
import com.amazonaws.internal.StaticCredentialsProvider;
public class AWSCredentialsProviderChainTest {
/**
* Tests that, by default, the chain remembers which provider was able to
* provide credentials, and only calls that provider for any additional
* calls to getCredentials.
*/
@Test
public void testReusingLastProvider() throws Exception {
MockCredentialsProvider provider1 = new MockCredentialsProvider();
provider1.throwException = true;
MockCredentialsProvider provider2 = new MockCredentialsProvider();
AWSCredentialsProviderChain chain = new AWSCredentialsProviderChain(provider1, provider2);
assertEquals(0, provider1.getCredentialsCallCount);
assertEquals(0, provider2.getCredentialsCallCount);
chain.getCredentials();
assertEquals(1, provider1.getCredentialsCallCount);
assertEquals(1, provider2.getCredentialsCallCount);
chain.getCredentials();
assertEquals(1, provider1.getCredentialsCallCount);
assertEquals(2, provider2.getCredentialsCallCount);
chain.getCredentials();
assertEquals(1, provider1.getCredentialsCallCount);
assertEquals(3, provider2.getCredentialsCallCount);
}
/**
* Tests that, when provider caching is disabled, the chain will always try
* all providers in the chain, starting with the first, until it finds a
* provider that can return credentials.
*/
@Test
public void testDisableReusingLastProvider() throws Exception {
MockCredentialsProvider provider1 = new MockCredentialsProvider();
provider1.throwException = true;
MockCredentialsProvider provider2 = new MockCredentialsProvider();
AWSCredentialsProviderChain chain = new AWSCredentialsProviderChain(Arrays.asList(provider1, provider2));
chain.setReuseLastProvider(false);
assertEquals(0, provider1.getCredentialsCallCount);
assertEquals(0, provider2.getCredentialsCallCount);
chain.getCredentials();
assertEquals(1, provider1.getCredentialsCallCount);
assertEquals(1, provider2.getCredentialsCallCount);
chain.getCredentials();
assertEquals(2, provider1.getCredentialsCallCount);
assertEquals(2, provider2.getCredentialsCallCount);
}
private static final class MockCredentialsProvider extends StaticCredentialsProvider {
public int getCredentialsCallCount = 0;
public boolean throwException = false;
public MockCredentialsProvider() {
super(new BasicAWSCredentials("accessKey", "secretKey"));
}
@Override
public AWSCredentials getCredentials() {
getCredentialsCallCount++;
if (throwException) throw new RuntimeException("No credentials");
else return super.getCredentials();
}
}
}