@Value "Could not resolve placeholder" in Spring Boot Test

You need to add

@PropertySource("classpath:application.properties")

to your class, so it will pick your normal configurations.

If you need different configurations for test you can add

@TestPropertySource(locations="classpath:test.properties")

If not just copy paste your config file to test/resources folder, then boot will pick from there.

See this.

You can use the @SpringBootTest that will do create the PropertySourcesPlaceholderConfigurer automatically.

This is described in the Testing chapter of the Spring Boot documentation.

http://docs.spring.io/spring-boot/docs/current/reference/html/boot-features-testing.html#boot-features-configfileapplicationcontextinitializer-test-utility

You have annotated your test class with @ContextConfiguration(classes = {ApplicationTest.class}). Wherein ApplicationTest.class does the component scan on a mentioned package. When you run your test it tries to find the configuration from the resources folder in 'main' instead of 'test'. If you annotate your class with @SpringBootTest(classes = {ClassToBeTested.class}) or just @SpringBootTest in this particular case, I think (not 100% sure) it will create a limited context and pick up the properties from test/resources.

If your properties are test specific, you can name your properties/yml file as application-test.properties or application-test.yml. And use @ActiveProfiles("test") in your test class so that it will always read test specific properties file.

I usually use this solution which works for me.