How can you ensure a unified context setup for tests located in different classes?

To ensure a unified test context setup across different classes in Java, a common base class or configuration class is usually used, which initializes the necessary context.

For example, in Spring tests, you can create a class with the @ContextConfiguration annotation and use it as a base for all test classes. You can also use the @BeforeClass annotation in the base class to perform initialization once before all tests run.

Example:

@RunWith(SpringRunner.class)
@ContextConfiguration(classes = AppConfig.class)
public abstract class BaseTest {
    @BeforeClass
    public static void setUpContext() {
        // Initialization of the common context
    }
}

public class FirstTest extends BaseTest {
    @Test
    public void testSomething() {
        // test
    }
}

public class SecondTest extends BaseTest {
    @Test
    public void testAnother() {
        // test
    }
}

Thus, the context is initialized once in the base class and is accessible in all subclasses.