@Test
    void abstract_classes_are_rejected() {
        assertThrows(IllegalArgumentException.class, () -> {
            new ComponentNode(ComponentId.fromString("Test"), "", AbstractClass.class);
        });
    }
@author gjoranv
@author Tony Vaagenes
@author ollivir
container-core/src/test/java/com/yahoo/container/di/componentgraph/core/ComponentGraphTest.java