DelegatingModuleRegistryTests.java

/*
 * Copyright 2013 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.xd.dirt.module;


import static org.hamcrest.Matchers.containsInAnyOrder;
import static org.hamcrest.Matchers.notNullValue;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.assertThat;
import static org.springframework.xd.dirt.module.ModuleDefinitionMatchers.module;
import static org.springframework.xd.module.ModuleType.processor;
import static org.springframework.xd.module.ModuleType.sink;
import static org.springframework.xd.module.ModuleType.source;

import java.util.List;

import org.junit.Before;
import org.junit.Test;

import org.springframework.xd.module.ModuleDefinition;


/**
 * Tests for DelegatingModuleRegistry.
 *
 * @author Eric Bottard
 * @author Glenn Renfro
 */
public class DelegatingModuleRegistryTests {

	private static final String REGISTRY_ROOT = "org.springframework.xd.dirt.module.delegating_module_registry_tests";

	private ModuleRegistry registry;

	@Before
	public void setup() {
		String thisClass = REGISTRY_ROOT.replace(".", "/");

		ResourceModuleRegistry cp = new ResourceModuleRegistry(
				String.format("classpath:/%s/classpath-based", thisClass));
		ResourceModuleRegistry file = new ResourceModuleRegistry(String.format(
				"file:src/test/resources/%s/file-based", thisClass));
		registry = new DelegatingModuleRegistry(cp, file);
	}

	/**
	 * Tests that when at least one delegate has a module, it is found.
	 */
	@Test
	public void testFound() {
		ModuleDefinition def = registry.findDefinition("test-source", source);
		assertThat(def, notNullValue());
		assertThat(def, module("test-source", source));
	}

	/**
	 * Tests that when no delegate has a module, it is not found.
	 */
	@Test
	public void testNotFound() {
		ModuleDefinition def = registry.findDefinition("foo", sink);
		assertNull(def);
	}


	/**
	 * Tests the find [all] definitions behavior.
	 */
	@SuppressWarnings("unchecked")
	@Test
	public void testFindDefinitions() {
		List<ModuleDefinition> definitions = registry.findDefinitions();

		assertThat(definitions, containsInAnyOrder(
				module("test-source", source),
				module("test-processor", processor),
				module("test-sink", sink),
				module("foobar", source),
				module("foobar", sink)
		));

	}

	@SuppressWarnings("unchecked")
	@Test
	public void testFindByName() {
		List<ModuleDefinition> result = registry.findDefinitions("foobar");
		assertThat(result, containsInAnyOrder(module("foobar", source), module("foobar", sink)));
	}

	@SuppressWarnings("unchecked")
	@Test
	public void testFindByType() {
		List<ModuleDefinition> result = registry.findDefinitions(source);
		assertThat(result, containsInAnyOrder(module("test-source", source), module("foobar", source)));
	}
}