ConditionalOnExpressionTests.java

/*
 * 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.autoconfigure.condition;

import org.junit.Test;

import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

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

/**
 * Tests for {@link ConditionalOnExpression}.
 *
 * @author Dave Syer
 * @author Stephane Nicoll
 */
public class ConditionalOnExpressionTests {

	private final AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext();

	@Test
	public void expressionIsTrue() {
		this.context.register(BasicConfiguration.class);
		this.context.refresh();
		assertThat(this.context.containsBean("foo")).isTrue();
		assertThat(this.context.getBean("foo")).isEqualTo("foo");
	}

	@Test
	public void expressionIsFalse() {
		this.context.register(MissingConfiguration.class);
		this.context.refresh();
		assertThat(this.context.containsBean("foo")).isFalse();
	}

	@Test
	public void expressionIsNull() {
		this.context.register(NullConfiguration.class);
		this.context.refresh();
		assertThat(this.context.containsBean("foo")).isFalse();
	}

	@Configuration
	@ConditionalOnExpression("false")
	protected static class MissingConfiguration {

		@Bean
		public String bar() {
			return "bar";
		}

	}

	@Configuration
	@ConditionalOnExpression("true")
	protected static class BasicConfiguration {

		@Bean
		public String foo() {
			return "foo";
		}

	}

	@Configuration
	@ConditionalOnExpression("true ? null : false")
	protected static class NullConfiguration {

		@Bean
		public String foo() {
			return "foo";
		}

	}

}