public void testRemoveNode() { Graph graph = new Graph("chain1"); Node node = new Node("node1", "org.esa.beam.framework.gpf.TestOps$Op1Spi"); try { graph.addNode(node); } catch (IllegalArgumentException e) { fail(e.getMessage()); } boolean result = graph.removeNode("node1"); assertEquals("chain1", graph.getId()); assertNotNull(graph.getNodes()); assertTrue(result); assertNull(graph.getNode("node1")); }