StackResourceRegistryDetectingResourceIdResolverTest.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;

import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.ExpectedException;
import org.springframework.beans.factory.ListableBeanFactory;
import org.springframework.cloud.aws.core.env.stack.StackResourceRegistry;

import java.util.HashMap;
import java.util.Map;

import static org.hamcrest.CoreMatchers.is;
import static org.hamcrest.MatcherAssert.assertThat;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.when;

public class StackResourceRegistryDetectingResourceIdResolverTest {

    @Rule
    public ExpectedException expectedException = ExpectedException.none();

    @Test
    public void resolveToPhysicalResourceId_logicalResourceIdOfNonStackResourceAndNoStackResourceRegistryAvailable_returnsLogicalResourceIdAsPhysicalResourceId() throws Exception {
        // Arrange
        StackResourceRegistryDetectingResourceIdResolver resourceIdResolver = new StackResourceRegistryDetectingResourceIdResolver();
        resourceIdResolver.setBeanFactory(makeListableBeanFactory());
        resourceIdResolver.afterPropertiesSet();

        // Act
        String physicalResourceId = resourceIdResolver.resolveToPhysicalResourceId("logicalResourceId");

        // Assert
        assertThat(physicalResourceId, is("logicalResourceId"));
    }

    @Test
    public void resolveToPhysicalResourceId_logicalResourceIdOfNonStackResourceAndStackResourceRegistryAvailable_returnsLogicalResourceIdAsPhysicalResourceId() throws Exception {
        // Arrange
        StackResourceRegistryDetectingResourceIdResolver resourceIdResolver = new StackResourceRegistryDetectingResourceIdResolver();
        resourceIdResolver.setBeanFactory(makeListableBeanFactory(makeStackResourceRegistry()));
        resourceIdResolver.afterPropertiesSet();

        // Act
        String physicalResourceId = resourceIdResolver.resolveToPhysicalResourceId("logicalResourceId");

        // Assert
        assertThat(physicalResourceId, is("logicalResourceId"));
    }

    @Test
    public void resolveToPhysicalResourceId_logicalResourceIdOfStackResourceAndStackResourceRegistryAvailable_returnsPhysicalResourceIdFromStackResourceRegistry() throws Exception {
        // Arrange
        StackResourceRegistryDetectingResourceIdResolver resourceIdResolver = new StackResourceRegistryDetectingResourceIdResolver();
        resourceIdResolver.setBeanFactory(makeListableBeanFactory(makeStackResourceRegistry("logicalResourceId", "physicalResourceId")));
        resourceIdResolver.afterPropertiesSet();

        // Act
        String physicalResourceId = resourceIdResolver.resolveToPhysicalResourceId("logicalResourceId");

        // Assert
        assertThat(physicalResourceId, is("physicalResourceId"));
    }

    @Test
    public void createInstance_multipleStackResourceRegistriesAvailable_throwsException() throws Exception {
        // Arrange
        StackResourceRegistryDetectingResourceIdResolver resourceIdResolver = new StackResourceRegistryDetectingResourceIdResolver();
        resourceIdResolver.setBeanFactory(makeListableBeanFactory(makeStackResourceRegistry(), makeStackResourceRegistry()));

        // Assert
        this.expectedException.expect(IllegalStateException.class);
        this.expectedException.expectMessage("Multiple stack resource registries found");

        // Act
        resourceIdResolver.afterPropertiesSet();
    }

    private static ListableBeanFactory makeListableBeanFactory(StackResourceRegistry... stackResourceRegistries) {
        Map<String, StackResourceRegistry> stackResourceRegistryMap = new HashMap<>();

        for (StackResourceRegistry stackResourceRegistry : stackResourceRegistries) {
            stackResourceRegistryMap.put(String.valueOf(stackResourceRegistry.hashCode()), stackResourceRegistry);
        }

        ListableBeanFactory listableBeanFactory = mock(ListableBeanFactory.class);
        when(listableBeanFactory.getBeansOfType(StackResourceRegistry.class)).thenReturn(stackResourceRegistryMap);

        return listableBeanFactory;
    }

    private static StackResourceRegistry makeStackResourceRegistry() {
        return makeStackResourceRegistry(null, null);
    }

    private static StackResourceRegistry makeStackResourceRegistry(String logicalResourceId, String physicalResourceId) {
        StackResourceRegistry stackResourceRegistry = mock(StackResourceRegistry.class);
        when(stackResourceRegistry.lookupPhysicalResourceId(logicalResourceId)).thenReturn(physicalResourceId);

        return stackResourceRegistry;
    }

}