@value annotations working on spring junit test, annotation ONLY config. no xml

dan.langford.SomeBean.java

// ./src/main/java/dan/langford/SomeTest.java


package dan.langford;

import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Component;

@Component
public class SomeBean {
	
	@Value("${some.value}")
	private String someValue;
	
	private String check = "test";

	public String getSomeValue() {
		return someValue;
	}

	public void setSomeValue(String someValue) {
		this.someValue = someValue;
	}

	public String getCheck() {
		return check;
	}

	public void setCheck(String check) {
		this.check = check;
	}
	
}

dan.langford.SomeTest.java

// ./src/test/java/dan/langford/SomeTest.java

package dan.langford;

import static org.hamcrest.CoreMatchers.is;
import static org.junit.Assert.*;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.beans.factory.config.PropertyPlaceholderConfigurer;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.io.ClassPathResource;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration
public class SomeTest {

	private static Log LOG = LogFactory.getLog(SomeTest.class);
	
	@Value("${some.value}")
	private String value;
	
	@Autowired
	private SomeBean bean;
	
	@Test
	public void testOne() {
		LOG.error("What?? ONE "+this.value);
		assertEquals("our value should be populated", "defenestration", this.value);
	}
	
	@Test
	public void testTwo() {
		LOG.error("What?? TWO "+bean.getSomeValue());
		assertThat("we should be sane", "test", is(bean.getCheck()));
		assertThat("bean value should be populated", "defenestration", is(bean.getSomeValue()));
	}
	
	@Configuration
	@ComponentScan("dan.langford")
	static class someConfig {
		
		// because @PropertySource doesnt work in annotation only land
		@Bean
		PropertyPlaceholderConfigurer propConfig() {
			PropertyPlaceholderConfigurer ppc =  new PropertyPlaceholderConfigurer();
			ppc.setLocation(new ClassPathResource("some.properties"));
			return ppc;
		}
	}
	
}

pom.xml

<!-- ./pom.xml -->

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
	<modelVersion>4.0.0</modelVersion>
	<groupId>annotationconfig</groupId>
	<artifactId>annotationconfig</artifactId>
	<version>0.0.1-SNAPSHOT</version>

	<dependencies>
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-context</artifactId>
			<version>3.1.2.RELEASE</version>
		</dependency>
		
		<dependency>
			<groupId>cglib</groupId>
			<artifactId>cglib</artifactId>
			<version>2.2.2</version>
		</dependency>

		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-test</artifactId>
			<version>3.1.2.RELEASE</version>
			<scope>test</scope>
		</dependency>

		<dependency>
			<groupId>junit</groupId>
			<artifactId>junit</artifactId>
			<version>4.8.1</version>
			<scope>test</scope>
		</dependency>

	</dependencies>

</project>

some.properties

# ./src/main/resources/some.properties

some.value=defenestration

Thanks for this! This was helpful for me to solve my @value annotations not being processed issue. As I was implementing and testing this, I've discovered in the Spring documents the PropertySourcesPlaceholderConfigurer (ref: http://docs.spring.io/spring/docs/3.1.x/javadoc-api/org/springframework/context/annotation/PropertySource.html). Using this instead of PropertyPlaceholderConfigurer is better since it uses the @propertysource annotations, and thus, does not need to be redefined. Also, the method that defines it should be static per Spring warnings in the log and http://stackoverflow.com/a/14943106/1034436.

Hope this improves your Gist!

Is there any way to make autowire without using xml ?