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diff --git a/system/general/src/test/java/org/wamblee/system/graph/component/ConnectExternalProvidedProvidedEdgeFilterTest.java b/system/general/src/test/java/org/wamblee/system/graph/component/ConnectExternalProvidedProvidedEdgeFilterTest.java
new file mode 100644
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+++ b/system/general/src/test/java/org/wamblee/system/graph/component/ConnectExternalProvidedProvidedEdgeFilterTest.java
@@ -0,0 +1,97 @@
+/*
+ * Copyright 2008 the original author or authors.
+ * 
+ * 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.wamblee.system.graph.component;
+
+import junit.framework.TestCase;
+
+import org.wamblee.system.container.Application;
+import org.wamblee.system.container.Container;
+import org.wamblee.system.core.Component;
+import org.wamblee.system.core.DefaultProvidedInterface;
+import org.wamblee.system.core.DefaultRequiredInterface;
+import org.wamblee.system.core.Environment;
+import org.wamblee.system.graph.DefaultEdge;
+import org.wamblee.system.graph.DefaultNode;
+import org.wamblee.system.graph.Edge;
+import org.wamblee.system.graph.EdgeFilter;
+import org.wamblee.system.graph.Node;
+
+public class ConnectExternalProvidedProvidedEdgeFilterTest extends TestCase {
+
+    private Container _container;
+    private Component _internal;
+    private String _externalInterfaceName;
+    private String _internalComponentName;
+    private String _internalInterfaceName;
+    private Edge _edge;
+
+    @Override
+    protected void setUp() throws Exception {
+        _container = new Container("container")
+                .addProvidedInterface(new DefaultProvidedInterface("string",
+                        String.class));
+        _internal = new Environment("env1");
+
+        _externalInterfaceName = _container.getProvidedInterfaces()[0]
+                .getName();
+        _internalComponentName = _internal.getName();
+        _internalInterfaceName = _internal.getProvidedInterfaces()[0].getName();
+
+        _edge = new DefaultEdge(new ExternalProvidedInterfaceNode(_container,
+                _container.getProvidedInterfaces()[0]),
+                new ProvidedInterfaceNode(_internal, _internal
+                        .getProvidedInterfaces()[0]));
+    }
+
+    public void testWrongExternal() {
+        EdgeFilter filter = new ConnectExternalProvidedProvidedFilter(
+                _externalInterfaceName + "x", _internalComponentName,
+                _internalInterfaceName);
+        assertFalse(filter.isViolated(_edge));
+    }
+
+    public void testRightExternalWrongComponent() {
+        EdgeFilter filter = new ConnectExternalProvidedProvidedFilter(
+                _externalInterfaceName, _internalComponentName + "x",
+                _internalInterfaceName);
+        assertTrue(filter.isViolated(_edge));
+    }
+
+    public void testRightExternalWrongInternal() {
+        EdgeFilter filter = new ConnectExternalProvidedProvidedFilter(
+                _externalInterfaceName, _internalComponentName,
+                _internalInterfaceName + "x");
+        assertTrue(filter.isViolated(_edge));
+    }
+    
+    public void testEverythingRight() { 
+        EdgeFilter filter = new ConnectExternalProvidedProvidedFilter(
+                _externalInterfaceName, _internalComponentName,
+                _internalInterfaceName);
+        assertFalse(filter.isViolated(_edge));
+    }
+
+
+    public void testWrongEdgeType() {
+        EdgeFilter filter = new ConnectExternalProvidedProvidedFilter(
+                _externalInterfaceName, _internalComponentName,
+                _internalInterfaceName);
+        DefaultEdge edge = new DefaultEdge(new DefaultNode("x"),
+                new DefaultNode("y"));
+        assertFalse(filter.isViolated(edge));
+    }
+
+}