JUnit 5: Implementing tests in test class and nested class results in incorrect reporting

Example Test Class

import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;

import static org.junit.jupiter.api.Assertions.assertTrue;

class ExampleTest {

    @Test
    void outerTest() {
        assertTrue(true);
    }

    @Nested
    class InnerExampleTest {
        @Test
        void innerTest() {
            assertTrue(true);
        }
    }
}

Expected Result

One TEST-ExampleTest.xml file containing the results of both tests or two files (TEST-ExampleTest.xml and TEST-ExampleTest$InnerExampleTest.xml) containing the results of their tests.

Actual Result

• TEST-ExampleTest.xml does not contain any test case.
• TEST-ExampleTest$InnerExampleTest.xml contains results for both test cases.

Workaround

Do not put any tests into the parent class if nested classes are used.

Analysis

org.apache.maven.surefire.junitplatform.RunListenerAdapter does not distinguish between the parent and the nested classes. Both are reported as new test sets.

org.apache.maven.plugin.surefire.report.TestSetRunListener does not support nested test sets, so the test set of the nested class overrides the test set of the parent class.