public void mixin() throws RepositoryException {
NodeTypeManager ntMgr = getAdminSession().getWorkspace().getNodeTypeManager();
NodeTypeTemplate mixTest = ntMgr.createNodeTypeTemplate();
mixTest.setName("mix:test");
mixTest.setMixin(true);
ntMgr.registerNodeType(mixTest, false);
Node testNode = getNode(TEST_PATH);
NodeType[] mix = testNode.getMixinNodeTypes();
assertEquals(0, mix.length);