How to set up the same values for the same variables across ExampleClass and TestExampleClass

Question

I am new to SpringBoot so I hope to find some help here! :)

I have a class (please, see below), and I struggle to write unit tests for the methods that use the information shown below. The ExampleClass takes @Values from a yaml file.

My question:

• How to set up configurable variables in a class and a test class so they pull values from the same place, so when I want to experiment with the values I do not have to go do a couple of different files/places to change the same values for a class and a test class.

• If the answer is @Autowired - how to set up @Mock-s e.g. for private AmazonSQS exampleSQS and private AmazonSQSAsync exampleAsync within the @Autowired?

I have tried:

• Setting up a test in src/test/resources app.yaml and using @TestPropertySource (walkaround version for yaml), and then @Value. That did not work because when the test enters a method in the ExampleClass, it loses the variables' values that I set up in TestExampleClass with @Value, and they reset to default(0, null etc.).

Code:

public class ExampleClass {
    private AmazonSQS exampleSQS;
    private AmazonSQSAsync exampleAsync;
    ...
    @Value("${a.b.var}")
        private int var;
    ...
}