如何更正 Spring 引导单元测试无法在两个几乎相同的测试类之一中加载应用程序上下文？

Question

I am building unit tests for a Spring Boot application that will call a couple of web services. One service builds a PDF and the other stores that document, and there are separate classes to call these services. I'm using IntelliJ for an IDE.

When I have a single test class to run all of my tests, things start up and work fine. When I have two separate test classes, the first class continues to work fine but when running the second I receive

ERROR [main] org.springframework.boot.SpringApplication: Application run failed
org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name...
Could not resolve placeholder 'PDF.form.serviceURL' in value "${PDF.form.serviceURL}"

The classes are annotated with the following, for the application context to start

 @RunWith(SpringRunner.class)
 @SpringBootTest(classes = Application.class)

What would cause one test class to run without issue, and an identical test class to fail to start the application context?

Answer 1

In this scenario, the problem was related to the JUnit configuration in IntelliJ. Without the appropriate environment options, the context would not start correctly, causing the error.