AmazonEc2InstanceIdProviderAwsTest.java

/*
 * Copyright 2013-2014 the original author or authors.
 *
 * 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 org.springframework.cloud.aws.core.env.ec2;

import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.springframework.cloud.aws.support.TestStackInstanceIdService;

import java.io.IOException;

import static org.hamcrest.CoreMatchers.is;
import static org.hamcrest.MatcherAssert.assertThat;

public class AmazonEc2InstanceIdProviderAwsTest {

    private TestStackInstanceIdService testStackInstanceIdService;

    @Before
    public void enableInstanceIdMetadataService() {
        this.testStackInstanceIdService = TestStackInstanceIdService.fromInstanceId("i-abcdefg");
        this.testStackInstanceIdService.enable();
    }

    @After
    public void disableInstanceIdMetadataService() {
        this.testStackInstanceIdService.disable();
    }

    @Test
    public void getCurrentInstanceId_instanceIdAvailableViaMetadataService_returnsInstanceIdFromMetadataService() throws IOException {
        // Arrange
        AmazonEc2InstanceIdProvider amazonEc2InstanceIdProvider = new AmazonEc2InstanceIdProvider();

        // Act
        String currentInstanceId = amazonEc2InstanceIdProvider.getCurrentInstanceId();

        // Assert
        assertThat(currentInstanceId, is("i-abcdefg"));
    }

}