/*
 * Copyright 2012-2017 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.boot.actuate.autoconfigure;

import java.util.List;
import java.util.stream.Collectors;
import java.util.stream.Stream;

import org.junit.Test;

import org.springframework.core.annotation.Order;
import org.springframework.core.type.StandardAnnotationMetadata;

import static org.assertj.core.api.Assertions.assertThat;

/**
 * Tests for {@link ManagementContextConfigurationImportSelector}.
 *
 * @author Phillip Webb
 * @author Andy Wilkinson
 */
public class ManagementContextConfigurationImportSelectorTests {

	@Test
	public void selectImportsShouldOrderResult() throws Exception {
		String[] imports = new TestManagementContextConfigurationsImportSelector(C.class,
				A.class, D.class, B.class).selectImports(
						new StandardAnnotationMetadata(EnableChildContext.class));
		assertThat(imports).containsExactly(A.class.getName(), B.class.getName(),
				C.class.getName(), D.class.getName());
	}

	@Test
	public void selectImportsFiltersChildOnlyConfigurationWhenUsingSameContext()
			throws Exception {
		String[] imports = new TestManagementContextConfigurationsImportSelector(
				ChildOnly.class, SameOnly.class, A.class).selectImports(
						new StandardAnnotationMetadata(EnableSameContext.class));
		assertThat(imports).containsExactlyInAnyOrder(SameOnly.class.getName(),
				A.class.getName());
	}

	@Test
	public void selectImportsFiltersSameOnlyConfigurationWhenUsingChildContext()
			throws Exception {
		String[] imports = new TestManagementContextConfigurationsImportSelector(
				ChildOnly.class, SameOnly.class, A.class).selectImports(
						new StandardAnnotationMetadata(EnableChildContext.class));
		assertThat(imports).containsExactlyInAnyOrder(ChildOnly.class.getName(),
				A.class.getName());
	}

	private static final class TestManagementContextConfigurationsImportSelector
			extends ManagementContextConfigurationImportSelector {

		private final List<String> factoryNames;

		private TestManagementContextConfigurationsImportSelector(Class<?>... classes) {
			this.factoryNames = Stream.of(classes).map(Class::getName)
					.collect(Collectors.toList());
		}

		@Override
		protected List<String> loadFactoryNames() {
			return this.factoryNames;
		}

	}

	@Order(1)
	private static class A {

	}

	@Order(2)
	private static class B {

	}

	@Order(3)
	private static class C {

	}

	static class D {

	}

	@ManagementContextConfiguration(ManagementContextType.CHILD)
	static class ChildOnly {

	}

	@ManagementContextConfiguration(ManagementContextType.SAME)
	static class SameOnly {

	}

	@EnableManagementContext(ManagementContextType.CHILD)
	static class EnableChildContext {

	}

	@EnableManagementContext(ManagementContextType.SAME)
	static class EnableSameContext {

	}

}
