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@ParameterizedTest
@ValueSource(strings = {"Hello", "JUnit"})
void withValueSource (String word){
    assertNotNull(word);
}

• Ability to use nested tests.

Can contain one @BeforeEach method, and one @AfterEach method, but because Java doesn’t allow static members in inner classes, the @BeforeAll and @AfterAll methods don’t work by default.

class JUnit5NestedExampleTest {

    ...

    @Nested
    @DisplayName("Tests in the nested class A") class A {

        ...

        @Test
        @DisplayName("Example test for method A")
        void sampleTestForMethodA() {
            //test logic
        }

        @Nested
        @DisplayName("Another nested test class") class B {
            //test logic
        }
    }
}

• Jupiter's extensions model.

Extensions model allows third parties to extend JUnit with their own additions. It is useful when a developer wants to use some features that absent in default JUnit version.

Now five main types of extension points can be used: test instance post-processing, conditional test execution, life-cycle callback, parameter resolution, exception handling.

An extension will be executed only if a class marked the corresponding annotation.  For detailed information, please take a look at the tutorial.

• Migration Process.

   Migration from JUnit 4 to 5 is not so difficult, as backward compatibility is available.

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