text: /*
   * Copyright 2002-2019 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
   *
   *      https://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.test.context.support;
  
  import org.junit.jupiter.api.Test;
  
  import org.springframework.context.ApplicationContext;
  import org.springframework.context.ConfigurableApplicationContext;
  import org.springframework.context.annotation.Bean;
  import org.springframework.context.annotation.Configuration;
  import org.springframework.test.context.ContextConfigurationAttributes;
  import org.springframework.test.context.ContextLoader;
  import org.springframework.test.context.MergedContextConfiguration;
  import org.springframework.util.ObjectUtils;
  
  import static org.assertj.core.api.Assertions.assertThat;
  import static org.assertj.core.api.Assertions.assertThatExceptionOfType;
  import static org.assertj.core.api.Assertions.assertThatIllegalArgumentException;
  import static org.assertj.core.api.Assertions.assertThatIllegalStateException;
  
  /**
   * Unit tests for {@link DelegatingSmartContextLoader}.
   *
   * @author Sam Brannen
   * @since 3.1
   */
  class DelegatingSmartContextLoaderTests {
  
  	private static final String[] EMPTY_STRING_ARRAY = new String[0];
  	private static final Class<?>[] EMPTY_CLASS_ARRAY = new Class<?>[0];
  
  	private final DelegatingSmartContextLoader loader = new DelegatingSmartContextLoader();
  
  
  	private static void assertEmpty(Object[] array) {
  		assertThat(ObjectUtils.isEmpty(array)).isTrue();
  	}
  
  	// --- SmartContextLoader - processContextConfiguration() ------------------
  
  	@Test
  	void processContextConfigurationWithDefaultXmlConfigGeneration() {
  		ContextConfigurationAttributes configAttributes = new ContextConfigurationAttributes(
  				XmlTestCase.class, EMPTY_STRING_ARRAY, EMPTY_CLASS_ARRAY, true, null, true, ContextLoader.class);
  		loader.processContextConfiguration(configAttributes);
  		assertThat(configAttributes.getLocations().length).isEqualTo(1);
  		assertEmpty(configAttributes.getClasses());
  	}
  
  	@Test
  	void processContextConfigurationWithDefaultConfigurationClassGeneration() {
  		ContextConfigurationAttributes configAttributes = new ContextConfigurationAttributes(
  				ConfigClassTestCase.class, EMPTY_STRING_ARRAY, EMPTY_CLASS_ARRAY, true, null, true, ContextLoader.class);
  		loader.processContextConfiguration(configAttributes);
  		assertThat(configAttributes.getClasses().length).isEqualTo(1);
  		assertEmpty(configAttributes.getLocations());
  	}
  
  	@Test
  	void processContextConfigurationWithDefaultXmlConfigAndConfigurationClassGeneration() {
  		ContextConfigurationAttributes configAttributes = new ContextConfigurationAttributes(
  				ImproperDuplicateDefaultXmlAndConfigClassTestCase.class, EMPTY_STRING_ARRAY, EMPTY_CLASS_ARRAY,
  				true, null, true, ContextLoader.class);
  		assertThatIllegalStateException().isThrownBy(() ->
  					loader.processContextConfiguration(configAttributes))
  			.withMessageContaining("both default locations AND default configuration classes were detected");
  	}
  
  	@Test
  	void processContextConfigurationWithLocation() {
  		String[] locations = new String[] {"classpath:/foo.xml"};
  		ContextConfigurationAttributes configAttributes = new ContextConfigurationAttributes(
  				getClass(), locations, EMPTY_CLASS_ARRAY, true, null, true, ContextLoader.class);
  		loader.processContextConfiguration(configAttributes);
  		assertThat(configAttributes.getLocations()).isEqualTo(locations);
  		assertEmpty(configAttributes.getClasses());
  	}
  
  	@Test
  	void processContextConfigurationWithConfigurationClass() {
  		Class<?>[] classes = new Class<?>[] {getClass()};
  		ContextConfigurationAttributes configAttributes = new ContextConfigurationAttributes(
  				getClass(), EMPTY_STRING_ARRAY, classes, true, null, true, ContextLoader.class);
  		loader.processContextConfiguration(configAttributes);
  		assertThat(configAttributes.getClasses()).isEqualTo(classes);
  		assertEmpty(configAttributes.getLocations());
  	}
  
  	// --- SmartContextLoader - loadContext() ----------------------------------
  
  	@Test
  	void loadContextWithNullConfig() throws Exception {
  		assertThatIllegalArgumentException().isThrownBy(() ->
  				loader.loadContext((MergedContextConfiguration) null));
  	}
  
  	@Test
  	void loadContextWithoutLocationsAndConfigurationClasses() throws Exception {
  		MergedContextConfiguration mergedConfig = new MergedContextConfiguration(
  				getClass(), EMPTY_STRING_ARRAY, EMPTY_CLASS_ARRAY, EMPTY_STRING_ARRAY, loader);
  		assertThatIllegalStateException().isThrownBy(() ->
  				loader.loadContext(mergedConfig))
  			.withMessageStartingWith("Neither")
  			.withMessageContaining("was able to load an ApplicationContext from");
  	}
  
  	/**
  	 * @since 4.1
  	 */
  	@Test
  	void loadContextWithLocationsAndConfigurationClasses() throws Exception {
  		MergedContextConfiguration mergedConfig = new MergedContextConfiguration(getClass(),
  				new String[] {"test.xml"}, new Class<?>[] {getClass()}, EMPTY_STRING_ARRAY, loader);
  		assertThatIllegalStateException().isThrownBy(() ->
  				loader.loadContext(mergedConfig))
  			.withMessageStartingWith("Neither")
  			.withMessageContaining("declare either 'locations' or 'classes' but not both.");
  	}
  
  	private void assertApplicationContextLoadsAndContainsFooString(MergedContextConfiguration mergedConfig)
  			throws Exception {
  
  		ApplicationContext applicationContext = loader.loadContext(mergedConfig);
  		assertThat(applicationContext).isNotNull();
  		assertThat(applicationContext.getBean(String.class)).isEqualTo("foo");
  		boolean condition = applicationContext instanceof ConfigurableApplicationContext;
  		assertThat(condition).isTrue();
  		((ConfigurableApplicationContext) applicationContext).close();
  	}
  
  	@Test
  	void loadContextWithXmlConfig() throws Exception {
  		MergedContextConfiguration mergedConfig = new MergedContextConfiguration(
  				XmlTestCase.class,
  				new String[] {"classpath:/org/springframework/test/context/support/DelegatingSmartContextLoaderTests$XmlTestCase-context.xml"},
  				EMPTY_CLASS_ARRAY, EMPTY_STRING_ARRAY, loader);
  		assertApplicationContextLoadsAndContainsFooString(mergedConfig);
  	}
  
  	@Test
  	void loadContextWithConfigurationClass() throws Exception {
  		MergedContextConfiguration mergedConfig = new MergedContextConfiguration(ConfigClassTestCase.class,
  				EMPTY_STRING_ARRAY, new Class<?>[] {ConfigClassTestCase.Config.class}, EMPTY_STRING_ARRAY, loader);
  		assertApplicationContextLoadsAndContainsFooString(mergedConfig);
  	}
  
  	// --- ContextLoader -------------------------------------------------------
  
  	@Test
  	void processLocations() {
  		assertThatExceptionOfType(UnsupportedOperationException.class).isThrownBy(() ->
  				loader.processLocations(getClass(), EMPTY_STRING_ARRAY));
  	}
  
  	@Test
  	void loadContextFromLocations() throws Exception {
  		assertThatExceptionOfType(UnsupportedOperationException.class).isThrownBy(() ->
  				loader.loadContext(EMPTY_STRING_ARRAY));
  	}
  
  
  	// -------------------------------------------------------------------------
  
  	static class XmlTestCase {
  	}
  
  	static class ConfigClassTestCase {
  
  		@Configuration
  		static class Config {
  
  			@Bean
  			public String foo() {
  				return new String("foo");
  			}
  		}
  
  		static class NotAConfigClass {
  		}
  	}
  
  	static class ImproperDuplicateDefaultXmlAndConfigClassTestCase {
  
  		@Configuration
  		static class Config {
  			// intentionally empty: we just need the class to be present to fail
  			// the test
  		}
  	}
  
  }
  