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diff --git a/sca-java-1.x/tags/java-stable-20060304/sca/core/src/test/java/org/apache/tuscany/core/context/AbstractAggregateHierarchyTests.java b/sca-java-1.x/tags/java-stable-20060304/sca/core/src/test/java/org/apache/tuscany/core/context/AbstractAggregateHierarchyTests.java
new file mode 100644
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+++ b/sca-java-1.x/tags/java-stable-20060304/sca/core/src/test/java/org/apache/tuscany/core/context/AbstractAggregateHierarchyTests.java
@@ -0,0 +1,107 @@
+/**
+ * 
+ * Copyright 2005 The Apache Software Foundation or its licensors, as applicable.
+ * 
+ * Licensed 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.core.context;
+
+import java.util.List;
+
+import junit.framework.Assert;
+import junit.framework.TestCase;
+
+import org.apache.tuscany.common.monitor.impl.NullMonitorFactory;
+import org.apache.tuscany.core.builder.RuntimeConfigurationBuilder;
+import org.apache.tuscany.core.context.impl.AggregateContextImpl;
+import org.apache.tuscany.core.context.impl.EventContextImpl;
+import org.apache.tuscany.core.context.scope.DefaultScopeStrategy;
+import org.apache.tuscany.core.mock.MockConfigContext;
+import org.apache.tuscany.core.mock.MockFactory;
+import org.apache.tuscany.core.mock.component.ModuleScopeSystemComponent;
+import org.apache.tuscany.core.mock.component.ModuleScopeSystemComponentImpl;
+import org.apache.tuscany.model.assembly.Component;
+import org.apache.tuscany.model.assembly.EntryPoint;
+import org.apache.tuscany.model.assembly.Scope;
+import org.osoa.sca.ModuleContext;
+
+/**
+ * Performs testing of various hierarchical scenarios
+ * 
+ * @version $Rev$ $Date$
+ */
+public abstract class AbstractAggregateHierarchyTests extends TestCase {
+    protected List<RuntimeConfigurationBuilder> builders;
+
+    public void testParentContextIsolation() throws Exception {
+        AggregateContext parent = createContextHierachy();
+        AggregateContext child = (AggregateContext) parent.getContext("test.child");
+        Component component = MockFactory.createSystemComponent("TestService1", ModuleScopeSystemComponentImpl.class,
+                Scope.MODULE);
+        parent.registerModelObject(component);
+        EntryPoint ep = MockFactory.createEPSystemBinding("TestService1EP", ModuleScopeSystemComponent.class, "TestService1",
+                component);
+        parent.registerModelObject(ep);
+        parent.fireEvent(EventContext.MODULE_START, null);
+        child.fireEvent(EventContext.MODULE_START, null);
+        Assert.assertNotNull(parent.locateInstance("TestService1EP"));
+        try {
+            ((ModuleContext) child).locateService("TestService1EP");
+            fail("Expexcted " + ServiceNotFoundException.class.getName());
+        } catch (ServiceNotFoundException e) {
+            // expect exception to be thrown
+        }
+        parent.fireEvent(EventContext.MODULE_STOP, null);
+        child.fireEvent(EventContext.MODULE_STOP, null);
+        parent.stop();
+
+    }
+
+    /**
+     * Checks that registration of duplicate named model objects before context start throws an exception
+     */
+    public void testRegisterSameName() throws Exception {
+        AggregateContext parent = new AggregateContextImpl("test.parent", null, new DefaultScopeStrategy(),
+                new EventContextImpl(), new MockConfigContext(builders), new NullMonitorFactory());
+        parent.registerModelObject(MockFactory.createSystemAggregateComponent("test.child"));
+        try {
+            parent.registerModelObject(MockFactory.createSystemAggregateComponent("test.child"));
+            parent.start();
+            fail("Expected " + DuplicateNameException.class.getName());
+        } catch (DuplicateNameException e) {
+            // expected
+        }
+    }
+
+    /**
+     * Checks that registration of duplicate named model objects after context start throws an exception
+     */
+    public void testRegisterSameNameAfterStart() throws Exception {
+        AggregateContext parent = new AggregateContextImpl("test.parent", null, new DefaultScopeStrategy(),
+                new EventContextImpl(), new MockConfigContext(builders), new NullMonitorFactory());
+        parent.registerModelObject(MockFactory.createSystemAggregateComponent("test.child"));
+        parent.start();
+        AggregateContext child = (AggregateContext) parent.getContext("test.child");
+        Assert.assertNotNull(child);
+        try {
+            parent.registerModelObject(MockFactory.createSystemAggregateComponent("test.child"));
+            fail("Expected " + DuplicateNameException.class.getName());
+        } catch (DuplicateNameException e) {
+            // expected
+        }
+    }
+
+    protected abstract AggregateContext createContextHierachy() throws Exception;
+
+    protected void setUp() throws Exception {
+        super.setUp();
+        builders = MockFactory.createSystemBuilders();
+    }
+}