How to implement dependency injection with JUnit 5?-CodePudding

I was trying to follow multiple tutorials about the subject but I cannot understand how they support DI. To my basic understanding, DI should be supported by supplying extended/implemented classes object to the test, so the test will be able to be executed with multiple variations of the objects.

For example:

@Test
public void myTest(Base baseObj){
   assertThis(baseObj);
   assertThat(baseObj);
}

class Base {
  //data
  //methods
}

class Class1 extends Base{}
class Class2 extends Base{}
class Class3 extends Base{}

There should be a way to supply objects of the derived classes to the test. Am I wrong till here?

I couldn't understand from the explanations, how TestInfo class for example (or the other classes) helps me with that?

Can you enlighten me please?

CodePudding user response：

You can do it like this:

public class Test1 {
    @ParameterizedTest
    @MethodSource("myTest_Arguments")
    public void myTest(Base baseObj){
        System.out.println(baseObj);
    }

    static Stream<Arguments> myTest_Arguments() {
        return Stream.of(
            Arguments.of(new Class1()),
            Arguments.of(new Class2()),
            Arguments.of(new Class3()));
    }
}