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diff --git a/sdo-java/branches/sdo-1.1-incubating/impl/src/test/java/org/apache/tuscany/sdo/test/DataGraphTestCase.java b/sdo-java/branches/sdo-1.1-incubating/impl/src/test/java/org/apache/tuscany/sdo/test/DataGraphTestCase.java
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+/**
+ *
+ *  Licensed to the Apache Software Foundation (ASF) under one
+ *  or more contributor license agreements.  See the NOTICE file
+ *  distributed with this work for additional information
+ *  regarding copyright ownership.  The ASF licenses this file
+ *  to you under the Apache License, Version 2.0 (the
+ *  "License"); you may not use this file except in compliance
+ *  with the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing,
+ *  software distributed under the License is distributed on an
+ *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ *  KIND, either express or implied.  See the License for the
+ *  specific language governing permissions and limitations
+ *  under the License.
+ */
+package org.apache.tuscany.sdo.test;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.net.URL;
+
+import junit.framework.TestCase;
+
+import org.apache.tuscany.sdo.util.SDOUtil;
+
+import commonj.sdo.DataGraph;
+import commonj.sdo.DataObject;
+import commonj.sdo.Type;
+import commonj.sdo.helper.XSDHelper;
+
+/**
+  * Tests methods of DataGraph except for change summary which is tested elsewhere.
+  */
+public class DataGraphTestCase extends TestCase {
+    private final String SIMPLE_MODEL = "/simple.xsd";
+    private final String ANYTYPE_MODEL = "/anytype.xsd";
+
+    /**
+     * createRootObject(type) test with good parms.
+     */
+    public void testCreateRootObjectType() throws IOException {
+        // Create an empty data graph and add a root object, an instance of type Quote
+      
+        DataGraph dataGraph = SDOUtil.createDataGraph();
+        Type quoteType = dataGraph.getType("http://www.example.com/simple", "Quote");
+        DataObject quote = dataGraph.createRootObject(quoteType);
+
+        assertNotNull(quote);
+    }
+    
+    /**
+     * createRootObject(type) test with bad parm.
+     */
+    public void testCreateRootObjectTypeBad() throws IOException {
+        // Create an empty data graph and pass bad parms to createRootObject
+      
+        DataGraph dataGraph = SDOUtil.createDataGraph();
+        boolean success = false;
+        try {
+            dataGraph.createRootObject(null);
+        } catch(NullPointerException npe) {
+            fail("createRootObject with null type threw NullPointerException");
+        } catch(Exception e) {
+            success = true;
+        }
+        if (!success) {
+            fail("createRootObject with null type parameter did not throw an exception");
+        }
+    }
+    
+    /**
+     * createRootObject(type) test with good parms but too often to ensure
+     * that IllegalStateException is thrown
+     */
+    public void testCreateRootObjectTypeIllegalState() throws IOException {
+        // Create an empty data graph and add a root object, then add another root object
+      
+        DataGraph dataGraph = SDOUtil.createDataGraph();
+        DataObject quote = dataGraph.createRootObject("http://www.example.com/anytype", "Person");
+        
+        assertNotNull(quote);        
+
+        Type quoteType = dataGraph.getType("http://www.example.com/simple", "Quote");
+        assertNotNull(quoteType);
+        boolean success = false;
+        try {
+            dataGraph.createRootObject(quoteType);            
+        } catch(IllegalStateException ise) {
+            success = true;
+        } catch(Exception e) {
+            fail("createRootObject called when a root was already created and an exception other than IllegalStateException was thrown: "+e.getMessage());
+        }
+        if (!success) {
+            fail("createRootObject called when a root was already created but no IllegalStateException was thrown");
+        }
+    }
+    
+    /**
+     * createRootObject(type) test with good parms but too often to ensure
+     * that IllegalStateException is thrown
+     */
+    public void testCreateRootObjectUriTypenameIllegalState() throws IOException {
+        // Create an empty data graph and add a root object, then add another root object
+      
+        DataGraph dataGraph = SDOUtil.createDataGraph();
+        DataObject quote = dataGraph.createRootObject("http://www.example.com/anytype", "Person");
+        
+        assertNotNull(quote);        
+
+        boolean success = false;
+        try {
+            dataGraph.createRootObject("http://www.example.com/simple", "Quote");            
+        } catch(IllegalStateException ise) {
+            success = true;
+        } catch(Exception e) {
+            fail("createRootObject called when a root was already created and an exception other than IllegalStateException was thrown: "+e.getMessage());
+        }
+        if (!success) {
+            fail("createRootObject called when a root was already created but no IllegalStateException was thrown");
+        }
+    }
+    
+    /**
+     * createRootObject(uri_string, typeName_string) test with good parms.
+     */
+    public void testCreateRootObjectUriTypename() throws IOException {
+        // Create an empty data graph and add a root object, an instance of type Quote
+      
+        DataGraph dataGraph = SDOUtil.createDataGraph();
+        DataObject quote = dataGraph.createRootObject("http://www.example.com/simple", "Quote");
+
+        assertNotNull(quote);
+    }
+    
+    /**
+     * createRootObject(uri_string, typeName_string) test with bad parms.
+     */
+    public void testCreateRootObjectUriTypenameBad1() throws IOException {
+        // Create an empty data graph and pass bad parms to createRootObject
+      
+        DataGraph dataGraph = SDOUtil.createDataGraph();
+        boolean success = false;
+        try {
+            dataGraph.createRootObject("http://www.example.com/mangled", "Quote");            
+        } catch(NullPointerException npe) {
+            fail("createRootObject with mangled URI threw NullPointerException");
+        } catch(Exception e) {
+            success = true;
+        }
+        if (!success) {
+            fail("createRootObject with mangled URI did not throw an exception");
+        }
+    }
+    
+    /**
+     * createRootObject(uri_string, typeName_string) test with bad parms.
+     */
+    public void testCreateRootObjectUriTypenameBad2() throws IOException {
+        // Create an empty data graph and pass bad parms to createRootObject
+      
+        DataGraph dataGraph = SDOUtil.createDataGraph();
+        boolean success = false;
+        try {
+            dataGraph.createRootObject("http://www.example.com/simple", "Mangled");            
+        } catch(NullPointerException npe) {
+            fail("createRootObject with mangled type name threw NullPointerException");
+        } catch(Exception e) {
+            success = true;
+        }
+        if (!success) {
+            fail("createRootObject with mangled type name did not throw an exception");
+        }
+    }
+    
+    /**
+     * getType(uri_string, typeName_string) test with good parms.
+     */
+    public void testGetType() throws IOException {
+        // Create an empty data graph and get a type, a Quote type
+      
+        DataGraph dataGraph = SDOUtil.createDataGraph();
+        Type quoteType = dataGraph.getType("http://www.example.com/simple", "Quote");
+
+        assertNotNull(quoteType);
+    }
+    
+    /**
+     * getType(uri_string, typeName_string) test with bad URI parm.
+     */
+    public void testGetTypeBad1() throws IOException {
+        // Create an empty data graph and pass bad parms to getType
+      
+        DataGraph dataGraph = SDOUtil.createDataGraph();
+        Type quoteType = null;
+        try {
+            quoteType = dataGraph.getType("http://www.example.com/mangled", "Quote");            
+        } catch(Exception e) {
+            fail("getType with mangled URI threw an exception: "+e.getMessage());
+        }
+        assertNull(quoteType);
+    }
+    
+    /**
+     * getType(uri_string, typeName_string) test with bad type name parm.
+     */
+    public void testGetTypeBad2() throws IOException {
+        // Create an empty data graph and pass bad parms to getType
+      
+        DataGraph dataGraph = SDOUtil.createDataGraph();
+        Type quoteType = null;
+        try {
+            quoteType = dataGraph.getType("http://www.example.com/simple", "Mangled"); 
+        } catch(Exception e) {
+            fail("getType with mangled type name threw an exception: "+e.getMessage());
+        }
+        assertNull(quoteType);
+    }
+
+    /**
+     * getType(uri_string, typeName_string) test with null URI parm.
+     */
+    public void testGetTypeBad3() throws IOException {
+        // Create an empty data graph and pass bad parms to getType
+      
+        DataGraph dataGraph = SDOUtil.createDataGraph();
+        Type quoteType = null;
+        try {
+            quoteType = dataGraph.getType(null, "Quote");            
+        } catch(Exception e) {
+            fail("getType with null URI threw an exception: "+e.getMessage());
+        }
+        assertNull(quoteType);
+    }
+    
+    /**
+     * getType(uri_string, typeName_string) test with null type name parm.
+     */
+    public void testGetTypeBad4() throws IOException {
+        // Create an empty data graph and pass bad parms to getType
+      
+        DataGraph dataGraph = SDOUtil.createDataGraph();
+        Type quoteType = null;
+        try {
+            quoteType = dataGraph.getType("http://www.example.com/simple", null); 
+        } catch(Exception e) {
+            fail("getType with null type name threw an exception: "+e.getMessage());
+        }
+        assertNull(quoteType);
+    }
+    
+    protected void setUp() throws Exception {
+        super.setUp();
+
+        // Populate the meta data for the Quote type
+        URL url = getClass().getResource(SIMPLE_MODEL);
+        InputStream inputStream = url.openStream();
+        XSDHelper.INSTANCE.define(inputStream, url.toString());
+        inputStream.close();
+        
+        // Populate the meta data for the Person type
+        URL url2 = getClass().getResource(ANYTYPE_MODEL);
+        InputStream inputStream2 = url2.openStream();
+        XSDHelper.INSTANCE.define(inputStream2, url2.toString());
+        inputStream2.close();
+    }
+}