A TestSuite and new test cases

test/src/net/sourceforge/plantuml/servlet/TestImage.java

@@ -0,0 +1,35 @@
+package net.sourceforge.plantuml.servlet;
+
+import junit.framework.TestCase;
+import com.meterware.httpunit.*;
+
+import java.io.ByteArrayOutputStream;
+import java.io.InputStream;
+
+public class TestImage extends TestCase {
+    /**
+     * Verifies the generation of the version image from an encoded URL
+     */
+    public void testVersionImage() throws Exception {
+        WebConversation conversation = new WebConversation();
+        WebRequest request = new GetMethodWebRequest( TestUtils.getServerUrl()+"img/AqijAixCpmC0");
+        WebResponse response = conversation.getResource( request);
+        // Analyze response
+        // Verifies the Content-Type header
+        assertEquals( "image/png", response.getContentType());
+        // Get the image and verify its size 
+        InputStream responseStream = response.getInputStream();
+        ByteArrayOutputStream imageStream = new ByteArrayOutputStream();
+        byte[] buf = new byte[1024];
+        int n = 0;
+        while( ( n = responseStream.read( buf)) != -1) {
+            imageStream.write( buf, 0, n);
+        }
+        imageStream.close();
+        responseStream.close();
+        byte[] inMemoryImage = imageStream.toByteArray();
+        int diagramLen = inMemoryImage.length;
+        assertTrue( diagramLen > 10000);
+        assertTrue( diagramLen < 20000); 
+    }
+}