SpelExpressionConverterConfigurationTests.java

/*
 * Copyright 2015-present 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.cloud.stream.config;

import java.util.List;

import jakarta.annotation.PostConstruct;
import org.junit.jupiter.api.Test;

import org.springframework.beans.BeansException;
import org.springframework.beans.factory.BeanFactory;
import org.springframework.beans.factory.BeanFactoryAware;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.PropertySource;
import org.springframework.expression.EvaluationContext;
import org.springframework.expression.Expression;
import org.springframework.expression.PropertyAccessor;
import org.springframework.integration.expression.ExpressionUtils;
import org.springframework.integration.json.JacksonPropertyAccessor;
import org.springframework.integration.test.util.TestUtils;

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

/**
 * Tests for SpelExpressionConverterConfiguration.
 *
 * @author Eric Bottard
 * @author Artem Bilan
 * @author Soby Chacko
 */
@SpringBootTest(classes = SpelExpressionConverterConfigurationTests.Config.class)
class SpelExpressionConverterConfigurationTests {

	@Autowired
	private Pojo pojo;

	@Autowired
	private EvaluationContext evaluationContext;

	@Autowired
	private Config config;

	@Test
	@SuppressWarnings("unchecked")
	void converterCorrectlyInstalled() {
		Expression expression = this.pojo.getExpression();
		assertThat(expression.getValue("{\"a\": {\"b\": 5}}").toString()).isEqualTo("5");

		List<PropertyAccessor> propertyAccessors = TestUtils.getPropertyValue(
				this.evaluationContext, "propertyAccessors", List.class);

		assertThat(propertyAccessors)
				.hasAtLeastOneElementOfType(JacksonPropertyAccessor.class);

		propertyAccessors = TestUtils.getPropertyValue(this.config.evaluationContext,
				"propertyAccessors", List.class);

		assertThat(propertyAccessors)
				.hasAtLeastOneElementOfType(JacksonPropertyAccessor.class);

		Expression numberExpression = this.pojo.getNumberExpression();
		assertThat(numberExpression.getValue()).isEqualTo(5);

		Expression booleanExpression = this.pojo.getBooleanExpression();
		assertThat(booleanExpression.getValue()).isEqualTo(true);
	}

	@ConfigurationProperties
	public static class Pojo {

		private Expression expression;

		private Expression numberExpression;

		private Expression booleanExpression;

		public Expression getExpression() {
			return this.expression;
		}

		public void setExpression(Expression expression) {
			this.expression = expression;
		}

		public Expression getNumberExpression() {
			return numberExpression;
		}

		public void setNumberExpression(Expression numberExpression) {
			this.numberExpression = numberExpression;
		}

		public Expression getBooleanExpression() {
			return booleanExpression;
		}

		public void setBooleanExpression(Expression booleanExpression) {
			this.booleanExpression = booleanExpression;
		}

	}

	@Configuration
	@EnableAutoConfiguration
	@EnableConfigurationProperties(Pojo.class)
	@PropertySource("classpath:/application.yml")
	public static class Config implements BeanFactoryAware {

		private BeanFactory beanFactory;

		private EvaluationContext evaluationContext;

		@Override
		public void setBeanFactory(BeanFactory beanFactory) throws BeansException {
			this.beanFactory = beanFactory;
		}

		@Bean
		public EvaluationContext evaluationContext() {
			return ExpressionUtils.createStandardEvaluationContext(this.beanFactory);
		}

		@PostConstruct
		public void setup() {
			this.evaluationContext = ExpressionUtils
					.createStandardEvaluationContext(this.beanFactory);
		}
	}
}