@Test public void shouldCreateInstanceOfExistingBlockWhenBlockCalledWithNameOfRegisteredBlock() { PrimObject primObject = new PrimObject(); PrimObject block = mock(PrimObject.class); when(block.isMethodBlock()).thenReturn(true); PrimObject.BLOCKS.put("st/redline/core/Thing$M1", block); primObject.block("st/redline/core/Thing$M1", null); // not a test so much as documentation. }