@TestPropertySource doesn’t work for JUnit test with AnnotationConfigContextLoader in Spring 1.2.6

Turns out the best way (until Spring fixes this oversight) is to a PropertySourcesPlaceholderConfigurer that will bring in test.properties (or whatever you want) and @Import or extend that @Configuration.

import org.apache.commons.lang3.ArrayUtils;
import org.springframework.beans.factory.config.PropertyPlaceholderConfigurer;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.io.support.PathMatchingResourcePatternResolver;

import java.io.IOException;

@Configuration
public class PropertyTestConfiguration {
    @Bean
    public PropertyPlaceholderConfigurer propertyPlaceholderConfigurer() throws IOException {
        final PropertyPlaceholderConfigurer ppc = new PropertyPlaceholderConfigurer();
        ppc.setLocations(ArrayUtils.addAll(
                        new PathMatchingResourcePatternResolver().getResources("classpath*:application.properties"),
                        new PathMatchingResourcePatternResolver().getResources("classpath*:test.properties")
                )
        );

        return ppc;
    }

}

This allows you to define defaults in application.properties and override them in test.properties. Of course, if you have multiple schemes, then you can configure the PropertyTestConfiguration class as necessary.

And use this in a unit test.

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(loader = AnnotationConfigContextLoader.class)
public class PropertyTests {
    @Value("${elastic.index}")
    String index;

    @Configuration
    @Import({PropertyTestConfiguration.class})
    static class ContextConfiguration {
    }
}