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diff --git a/sca-java-1.x/tags/java-stable-20060304/sca/core/src/test/java/org/apache/tuscany/core/runtime/RuntimeContextImplTestCase.java b/sca-java-1.x/tags/java-stable-20060304/sca/core/src/test/java/org/apache/tuscany/core/runtime/RuntimeContextImplTestCase.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/runtime/RuntimeContextImplTestCase.java
@@ -0,0 +1,305 @@
+/**
+ * 
+ * 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.runtime;
+
+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.config.ConfigurationException;
+import org.apache.tuscany.core.context.AggregateContext;
+import org.apache.tuscany.core.context.Context;
+import org.apache.tuscany.core.context.EventContext;
+import org.apache.tuscany.core.context.impl.AggregateContextImpl;
+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.core.system.assembly.SystemAssemblyFactory;
+import org.apache.tuscany.core.system.assembly.impl.SystemAssemblyFactoryImpl;
+import org.apache.tuscany.core.system.context.TestBuilder;
+import org.apache.tuscany.model.assembly.Component;
+import org.apache.tuscany.model.assembly.ConfiguredService;
+import org.apache.tuscany.model.assembly.EntryPoint;
+import org.apache.tuscany.model.assembly.ExternalService;
+import org.apache.tuscany.model.assembly.Scope;
+import org.apache.tuscany.model.assembly.Service;
+import org.apache.tuscany.model.types.java.JavaServiceContract;
+import org.osoa.sca.ServiceUnavailableException;
+
+/**
+ * Performs basic tests on the runtime context
+ * 
+ * @version $Rev$ $Date$
+ */
+public class RuntimeContextImplTestCase extends TestCase {
+
+    private SystemAssemblyFactory systemFactory = new SystemAssemblyFactoryImpl();
+
+    private List<RuntimeConfigurationBuilder> builders;
+
+    /**
+     * Tests explicit wiring of an external service to a system entry point that is wired to a child system module entry
+     * point
+     */
+    public void testSystemExplicitWiring() throws Exception {
+        RuntimeContext runtime = new RuntimeContextImpl(new NullMonitorFactory(), null, builders, null);
+        runtime.start();
+
+        AggregateContext root = runtime.getRootContext();
+        Assert.assertNotNull(root);
+        Assert.assertTrue(root.getLifecycleState() == Context.RUNNING);
+
+        AggregateContext system = runtime.getSystemContext();
+        Assert.assertNotNull(system);
+        system.registerModelObject(MockFactory.createSystemModule());
+
+        // register a child system context
+        system.registerModelObject(MockFactory.createSystemAggregateComponent("system.child"));
+        AggregateContext systemChild = (AggregateContext) system.getContext("system.child");
+        systemChild.registerModelObject(MockFactory.createSystemChildModule());
+
+        // register a top-level system entry point that exposes the child entry point
+        EntryPoint ep = MockFactory.createEPSystemBinding("TestService2EP", ModuleScopeSystemComponent.class, "ref");
+        ep.getBindings().add(systemFactory.createSystemBinding());
+        Service service = systemFactory.createService();
+        service.setName("system.child/TestService2EP");
+        ((ConfiguredService) ep.getConfiguredReference().getTargetConfiguredServices().get(0)).setService(service);
+        JavaServiceContract inter = systemFactory.createJavaServiceContract();
+        inter.setInterface(ModuleScopeSystemComponentImpl.class);
+        service.setServiceContract(inter);
+        system.registerModelObject(ep);
+        system.fireEvent(EventContext.MODULE_START, null);
+        Assert.assertNotNull(system.locateInstance("TestService1"));
+        Assert.assertNotNull(system.locateInstance("TestService2EP"));
+
+        // create a test module and wire an external service to the system entry point
+        Component moduleComponent = MockFactory.createAggregateComponent("test.module");
+        runtime.registerModelObject(moduleComponent);
+        AggregateContextImpl moduleContext = (AggregateContextImpl) runtime.getContext("test.module");
+        Assert.assertNotNull(moduleContext);
+        ExternalService es = MockFactory.createESSystemBinding("TestService2ES", "tuscany.system/TestService2EP");
+        moduleContext.registerModelObject(es);
+        moduleContext.fireEvent(EventContext.MODULE_START, null);
+        Assert.assertNotNull(moduleContext.locateInstance("TestService2ES"));
+
+        moduleContext.fireEvent(EventContext.MODULE_STOP, null);
+        system.fireEvent(EventContext.MODULE_STOP, null);
+        runtime.stop();
+    }
+
+    /**
+     * Tests autowiring an external service to a system entry point
+     */
+    public void testSystemAutoWiring() throws Exception {
+        RuntimeContext runtime = new RuntimeContextImpl(new NullMonitorFactory(), null, builders, null);
+        runtime.start();
+
+        AggregateContext root = runtime.getRootContext();
+        Assert.assertNotNull(root);
+        Assert.assertTrue(root.getLifecycleState() == Context.RUNNING);
+
+        AggregateContext system = runtime.getSystemContext();
+        Assert.assertNotNull(system);
+        system.registerModelObject(MockFactory.createSystemModule());
+
+        // create a test module and wire an external service to the system entry point
+        Component moduleComponent = MockFactory.createAggregateComponent("test.module");
+        runtime.registerModelObject(moduleComponent);
+        AggregateContextImpl moduleContext = (AggregateContextImpl) runtime.getContext("test.module");
+        Assert.assertNotNull(moduleContext);
+        ExternalService es = MockFactory.createAutowirableExternalService("TestService2ES", ModuleScopeSystemComponent.class);
+        moduleContext.registerModelObject(es);
+
+        system.fireEvent(EventContext.MODULE_START, null);
+        moduleContext.fireEvent(EventContext.MODULE_START, null);
+        // test that the autowire was resolved
+        Assert.assertNotNull(moduleContext.locateInstance("TestService2ES"));
+
+        moduleContext.fireEvent(EventContext.MODULE_STOP, null);
+        system.fireEvent(EventContext.MODULE_STOP, null);
+        runtime.stop();
+    }
+
+    public void testServiceNotFound() throws Exception {
+        RuntimeContext runtime = new RuntimeContextImpl(new NullMonitorFactory(), null, builders, null);
+        runtime.start();
+
+        // create a test module
+        Component moduleComponent = MockFactory.createAggregateComponent("module");
+        runtime.registerModelObject(moduleComponent);
+        AggregateContextImpl moduleContext = (AggregateContextImpl) runtime.getContext("module");
+        moduleContext.fireEvent(EventContext.MODULE_START, null);
+        try {
+            moduleContext.locateService("TestService");
+            fail("Expected " + ServiceUnavailableException.class.getName());
+        } catch (ServiceUnavailableException e) {
+            // expected
+        }
+        moduleContext.fireEvent(EventContext.MODULE_STOP, null);
+        runtime.stop();
+    }
+
+    public void testExternalServiceReferenceNotFound() throws Exception {
+        RuntimeContext runtime = new RuntimeContextImpl(new NullMonitorFactory(), null, builders, null);
+        runtime.start();
+        AggregateContext system = runtime.getSystemContext();
+
+        // create a test module
+        Component moduleComponent = MockFactory.createAggregateComponent("module");
+        runtime.registerModelObject(moduleComponent);
+        AggregateContextImpl moduleContext = (AggregateContextImpl) runtime.getContext("module");
+        ExternalService es = MockFactory.createESSystemBinding("TestServiceES", "tuscany.system/TestService1xEP");
+        moduleContext.registerModelObject(es);
+
+        // start the modules and test inter-module system wires
+        system.fireEvent(EventContext.MODULE_START, null);
+        moduleContext.fireEvent(EventContext.MODULE_START, null);
+        try {
+            moduleContext.locateService("TestServiceES");
+            fail("Expected " + ServiceUnavailableException.class.getName());
+        } catch (ServiceUnavailableException e) {
+            // expected
+        }
+        moduleContext.fireEvent(EventContext.MODULE_STOP, null);
+        system.fireEvent(EventContext.MODULE_STOP, null);
+        runtime.stop();
+    }
+
+    public void testEntryPointReferenceNotFound() throws Exception {
+        RuntimeContext runtime = new RuntimeContextImpl(new NullMonitorFactory(), null, builders, null);
+        runtime.start();
+
+        // create a test module
+        Component moduleComponent = MockFactory.createAggregateComponent("module");
+        runtime.registerModelObject(moduleComponent);
+
+        Component component = MockFactory.createSystemComponent("NoService", ModuleScopeSystemComponentImpl.class, Scope.MODULE);
+        // do not register the above component!
+
+        AggregateContextImpl moduleContext = (AggregateContextImpl) runtime.getContext("module");
+        moduleContext.registerModelObject(MockFactory.createEPSystemBinding("TestServiceEP", ModuleScopeSystemComponent.class,
+                "NoReference", component));
+
+        moduleContext.fireEvent(EventContext.MODULE_START, null);
+        try {
+            moduleContext.locateService("TestServiceEP");
+            fail("Expected " + ServiceUnavailableException.class.getName());
+        } catch (ServiceUnavailableException e) {
+            // expected
+        }
+        moduleContext.fireEvent(EventContext.MODULE_STOP, null);
+        runtime.stop();
+    }
+
+    /**
+     * Test two module components that have external services wired to entry points contained in each
+     */
+    public void testCircularWires() throws Exception {
+        RuntimeContext runtime = new RuntimeContextImpl(new NullMonitorFactory(), null, builders, null);
+        runtime.start();
+
+        // create a test modules
+        Component module1 = MockFactory.createAggregateComponent("module1");
+        runtime.registerModelObject(module1);
+        Component module2 = MockFactory.createAggregateComponent("module2");
+        runtime.registerModelObject(module2);
+
+        AggregateContextImpl moduleContext1 = (AggregateContextImpl) runtime.getContext("module1");
+        AggregateContextImpl moduleContext2 = (AggregateContextImpl) runtime.getContext("module2");
+
+        Component component1 = MockFactory.createSystemComponent("Component1", ModuleScopeSystemComponentImpl.class,
+                Scope.MODULE);
+        EntryPoint entryPoint1 = MockFactory.createEPSystemBinding("EntryPoint1", ModuleScopeSystemComponent.class, "Component1",
+                component1);
+        ExternalService externalService1 = MockFactory.createESSystemBinding("ExternalService1", "module2/EntryPoint2");
+        moduleContext1.registerModelObject(component1);
+        moduleContext1.registerModelObject(entryPoint1);
+        moduleContext1.registerModelObject(externalService1);
+
+        Component component2 = MockFactory.createSystemComponent("Component2", ModuleScopeSystemComponentImpl.class,
+                Scope.MODULE);
+        EntryPoint entryPoint2 = MockFactory.createEPSystemBinding("EntryPoint2", ModuleScopeSystemComponent.class, "Component2",
+                component2);
+        ExternalService externalService2 = MockFactory.createESSystemBinding("ExternalService2", "module1/EntryPoint1");
+        moduleContext2.registerModelObject(component2);
+        moduleContext2.registerModelObject(entryPoint2);
+        moduleContext2.registerModelObject(externalService2);
+
+        moduleContext1.fireEvent(EventContext.MODULE_START, null);
+        moduleContext2.fireEvent(EventContext.MODULE_START, null);
+        Assert.assertNotNull(moduleContext2.locateInstance("ExternalService2"));
+        Assert.assertNotNull(moduleContext1.locateInstance("ExternalService1"));
+        runtime.stop();
+    }
+
+    /**
+     * Tests that a circular reference between an external service in one module and an entry point in another is caught
+     * as an error condition FIXME this must be implemented
+     */
+    public void testInterModuleCircularReference() throws Exception {
+        RuntimeContext runtime = new RuntimeContextImpl(new NullMonitorFactory(), null, builders, null);
+        runtime.start();
+
+        // create a test modules
+        Component module1 = MockFactory.createAggregateComponent("module1");
+        runtime.registerModelObject(module1);
+        Component module2 = MockFactory.createAggregateComponent("module2");
+        runtime.registerModelObject(module2);
+
+        AggregateContextImpl moduleContext1 = (AggregateContextImpl) runtime.getContext("module1");
+        AggregateContextImpl moduleContext2 = (AggregateContextImpl) runtime.getContext("module2");
+        ExternalService externalService1 = MockFactory.createESSystemBinding("ExternalService1", "module2/EntryPoint2");
+        EntryPoint entryPoint1 = MockFactory.createEPSystemBinding("EntryPoint1", ModuleScopeSystemComponent.class,
+                "ExternalService1", externalService1);
+        ExternalService externalService2 = MockFactory.createESSystemBinding("ExternalService2", "module1/EntryPoint1");
+        EntryPoint entryPoint2 = MockFactory.createEPSystemBinding("EntryPoint2", ModuleScopeSystemComponent.class,
+                "ExternalService2", externalService2);
+        try {
+            // FIXME this should throw a circular reference exception
+            moduleContext1.registerModelObject(externalService1);
+            moduleContext1.registerModelObject(entryPoint1);
+            moduleContext2.registerModelObject(externalService2);
+            moduleContext2.registerModelObject(entryPoint2);
+            // FIXME implement fail("Expected " + ConfigurationException.class.getName());
+        } catch (ConfigurationException e) {
+            // expected
+        }
+    }
+
+    public void testRuntimeBuilderAutowire() throws Exception {
+
+        RuntimeContext runtime = new RuntimeContextImpl(new NullMonitorFactory(), null, builders, null);
+        runtime.start();
+
+        AggregateContext system = runtime.getSystemContext();
+        Component builder = MockFactory.createSystemComponent("TestBuilder", TestBuilder.class, Scope.MODULE);
+        system.registerModelObject(builder);
+        system.fireEvent(EventContext.MODULE_START, null);
+        Component module1 = MockFactory.createAggregateComponent("module1");
+        runtime.registerModelObject(module1);
+        runtime.getContext("module1");
+        Assert.assertTrue(((TestBuilder) system.locateInstance("TestBuilder")).invoked());
+        system.fireEvent(EventContext.MODULE_STOP, null);
+        runtime.stop();
+
+    }
+
+    protected void setUp() throws Exception {
+        super.setUp();
+        builders = MockFactory.createSystemBuilders();
+    }
+}