Spock Mock String value in class

Question

I'm using Spring and I want to create unit test using Spock. This is my class

@Service
public class TestService{
    @Value("${test.path:}")
   private String path;
}

Is it any way to mock this variable in Spock tests without runing spring context?

Wouldn't it work if you just set the value on the `properties` parameter of `@SpringBootTest`? — Marcos Barbero, Dec 03 '20 at 12:01
I see! That's a very important thing to mention in your question — Marcos Barbero, Dec 03 '20 at 12:04
The only way I see it working is by using reflection, I'm not a heavy user of Spock. This can possible help you https://stackoverflow.com/questions/27552600/using-spock-to-mock-private-static-final-variables-in-java?answertab=active#tab-top — Marcos Barbero, Dec 03 '20 at 12:08

Michiel · Accepted Answer · 2021-01-07T15:53:57.013

Considering you don't want to set up a Spring(Boot) test, either inject the value field using constructor injection:

@Service
public class TestService{
   private String path;

   public TestService(@Value("${test.path:}") String path) {
        this.path = path;
   }
}
...

TestService service = new TestService("testValue");

Or set the value using ReflectionTestUtils:

TestService service = new TestService();
ReflectionTestUtils.setField(service, "path", "somePath");

Spock Mock String value in class

1 Answers1