tests/org.simantics.db.tests/src/org/simantics/db/tests/api/readGraph/getSingleObject/GetSingleObjectTest23.java

   1 /*******************************************************************************
   2  * Copyright (c) 2007, 2010 Association for Decentralized Information Management
   3  * in Industry THTH ry.
   4  * All rights reserved. This program and the accompanying materials
   5  * are made available under the terms of the Eclipse Public License v1.0
   6  * which accompanies this distribution, and is available at
   7  * http://www.eclipse.org/legal/epl-v10.html
   8  *
   9  * Contributors:
  10  *     VTT Technical Research Centre of Finland - initial API and implementation
  11  *******************************************************************************/
  12 package org.simantics.db.tests.api.readGraph.getSingleObject;
  13
  14 import org.simantics.db.ReadGraph;
  15 import org.simantics.db.Resource;
  16 import org.simantics.db.WriteGraph;
  17 import org.simantics.db.exception.DatabaseException;
  18 import org.simantics.db.exception.NoSingleResultException;
  19 import org.simantics.db.testing.base.WriteReadTest;
  20
  21 /**
  22  * Tests cases where a non-functional relation uses
  23  * {@link ReadGraph#getSingleObject(org.simantics.db.Resource, org.simantics.db.Resource)}
  24  * with > 1 objects.
  25  *
  26  * <p>
  27  * Should throw {@link NoSingleResultException}, at the time of writing this
  28  * test, AsyncBarrierImpl refcounting is trashed and DB client is stuck.
  29  */
  30 public class GetSingleObjectTest23 extends WriteReadTest {
  31         private Resource subject1;
  32         private Resource relation1;
  33         private Resource object1;
  34
  35         @Override
  36         protected void write(WriteGraph graph) throws DatabaseException {
  37
  38                 relation1 = graph.newResource();
  39                 graph.claim(relation1, L0.SubrelationOf, L0.IsRelatedTo);
  40
  41                 //Resource rel2 = graph.newResource();
  42                 //graph.claim(rel2, L0.SubrelationOf, relation1);
  43
  44                 subject1 = graph.newResource();
  45                 graph.claim(subject1, L0.InstanceOf, L0.Entity);
  46
  47                 object1 = graph.newResource();
  48                 Resource o2 = graph.newResource();
  49
  50                 graph.claim(subject1, relation1, object1);
  51                 graph.claim(subject1, relation1, o2);
  52         }
  53
  54         @Override
  55         protected void read(ReadGraph graph) throws DatabaseException {
  56                 try {
  57
  58                         Resource result = graph.getSingleObject(subject1, relation1);
  59                         assertNotNull("Null not allowed", result);
  60                         assertFalse("Wrong object was returned", (object1.equals(result)));
  61
  62                 } catch (NoSingleResultException e) {
  63                         //System.out.println("Read transaction threw an expected exception "
  64                         //              + e);
  65                         return;
  66                 } catch (Throwable e) {
  67                         fail("Read transaction threw an unexpected exception " + e);
  68                 }
  69                 fail("Should throw");
  70
  71                 /*
  72                  * try {
  73                  *
  74                  * graph.claim(subject1, relation1, relation1);
  75                  *
  76                  * } catch (Throwable e) {
  77                  * fail("Write transaction threw an unknown exception " + e); }
  78                  */
  79         }
  80
  81 }