What is the native Kotlin coroutine support in JUnit 6?

// JUnit 5 (before): runBlocking required
class NetworkServiceTest {
    @Test
    fun `should fetch user`(): Unit = runBlocking {
        val user = service.fetchUser("user-1")
        assertEquals("Alice", user.name)
    }

    @BeforeEach
    fun setUp(): Unit = runBlocking {
        service = NetworkService()
        service.connect()  // suspend function
    }
}

// JUnit 6 (now): suspend directly supported
class NetworkServiceTest {
    @Test
    suspend fun `should fetch user`() {  // No runBlocking needed!
        val user = service.fetchUser("user-1")
        assertEquals("Alice", user.name)
    }

    @BeforeEach
    suspend fun setUp() {   // Lifecycle methods can also be suspend
        service = NetworkService()
        service.connect()   // suspend function -- no wrapping needed
    }

    @AfterEach
    suspend fun tearDown() {
        service.disconnect()
    }
}

// IMPORTANT NOTE: JUnit 6's suspend support is equivalent to
// runBlocking -- it does NOT replace kotlin-coroutines-test
// for testing concurrent behaviour, StateFlow, etc.
// For full coroutine test control, use kotlinx-coroutines-test's
// runTest in addition to JUnit 6.