fixed duplicate analysis identified in https://github.com/jeremylong/dependency-check-gradle/issues/19

dependency-check-core/src/test/java/org/owasp/dependencycheck/EngineTest.java

@@ -0,0 +1,53 @@
+/*
+ * This file is part of dependency-check-core.
+ *
+ * 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.
+ *
+ * Copyright (c) 2016 Jeremy Long. All Rights Reserved.
+ */
+package org.owasp.dependencycheck;
+
+import java.io.File;
+import org.junit.Test;
+import static org.junit.Assert.*;
+import org.owasp.dependencycheck.analyzer.JarAnalyzer;
+import org.owasp.dependencycheck.data.nvdcve.DatabaseException;
+import org.owasp.dependencycheck.dependency.Dependency;
+
+/**
+ *
+ * @author Jeremy Long
+ */
+public class EngineTest extends BaseDBTestCase {
+
+    /**
+     * Test of scanFile method, of class Engine.
+     */
+    @Test
+    public void testScanFile() throws DatabaseException {
+        Engine instance = new Engine();
+        instance.addFileTypeAnalyzer(new JarAnalyzer());
+        File file = BaseTest.getResourceAsFile(this, "dwr.jar");
+        Dependency dwr = instance.scanFile(file);
+        file = BaseTest.getResourceAsFile(this, "org.mortbay.jmx.jar");
+        Dependency jmx = instance.scanFile(file);
+        assertEquals(2, instance.getDependencies().size());
+        
+        file = BaseTest.getResourceAsFile(this, "dwr.jar");
+        Dependency secondDwr = instance.scanFile(file);
+        
+        assertEquals(2, instance.getDependencies().size());
+        assertTrue(dwr == secondDwr);
+        
+    }
+}