# HG changeset patch
# User robcast
# Date 1447270209 -3600
# Node ID a2da0b5caedd6005d2be15c0507e4cb17d464d8e
# Parent  4043aa19dd30829443484c32a038030b39830b91
adding the first tests for digilib's scaling modes.
uses JUnit and Jetty's ServletTester.
test are disabled by default, enable with "mvn test -DskipTests=false".

diff -r 4043aa19dd30 -r a2da0b5caedd webapp/pom.xml
--- a/webapp/pom.xml	Wed Nov 11 11:42:29 2015 +0100
+++ b/webapp/pom.xml	Wed Nov 11 20:30:09 2015 +0100
@@ -13,6 +13,10 @@
 	<description>The Digital Image Library - web application server and HTML and JS clients.</description>
 	<url>http://digilib.sourceforge.net</url>
 	<packaging>war</packaging>
+	
+	<properties>
+        <skipTests>true</skipTests>
+    </properties>
 
 	<build>
 		<pluginManagement>
@@ -33,7 +37,15 @@
 						</includes>
 					</configuration>
 				</plugin>
-			</plugins>
+		        <plugin>
+			        <groupId>org.apache.maven.plugins</groupId>
+			        <artifactId>maven-surefire-plugin</artifactId>
+			        <version>2.19</version>
+			        <configuration>
+			            <skip>${skipTests}</skip>
+			        </configuration>
+			    </plugin>
+        	</plugins>
 		</pluginManagement>
 	</build>
 	<profiles>
@@ -169,11 +181,30 @@
                 <dependency>
                     <groupId>org.eclipse.jetty</groupId>
                     <artifactId>jetty-servlets</artifactId>
-                    <version>9.3.5.v20151012</version>
+                    <version>9.2.13.v20150730</version>
+                    <!-- <version>9.3.5.v20151012</version> -->
                 </dependency>
             </dependencies>
         </profile>
 	</profiles>
 	<dependencies>
+		<dependency>
+			<groupId>org.eclipse.jetty</groupId>
+			<artifactId>jetty-servlet</artifactId>
+            <version>9.2.13.v20150730</version>
+			<scope>test</scope>
+		</dependency>
+		<dependency>
+			<groupId>org.eclipse.jetty</groupId>
+			<artifactId>jetty-http</artifactId>
+			<version>9.2.13.v20150730</version>
+			<scope>test</scope>
+		</dependency>
+		<dependency>
+			<groupId>junit</groupId>
+			<artifactId>junit</artifactId>
+			<version>4.12</version>
+			<scope>test</scope>
+		</dependency>
 	</dependencies>
 </project>
diff -r 4043aa19dd30 -r a2da0b5caedd webapp/src/test/java/digilib/servlet/ScalerTest.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/webapp/src/test/java/digilib/servlet/ScalerTest.java	Wed Nov 11 20:30:09 2015 +0100
@@ -0,0 +1,177 @@
+package digilib.servlet;
+
+/*
+ * #%L
+ * ScalerTest -- tests for the digilib Scaler servlet
+ * 
+ * Digital Image Library servlet components
+ * 
+ * %%
+ * Copyright (C) 2015 MPIWG Berlin
+ * %%
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as 
+ * published by the Free Software Foundation, either version 3 of the 
+ * License, or (at your option) any later version.
+ * 
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Lesser Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Lesser Public 
+ * License along with this program.  If not, see
+ * <http://www.gnu.org/licenses/lgpl-3.0.html>.
+ * #L%
+ * Author: Robert Casties (robcast@users.sourceforge.net)
+ */
+
+import static org.junit.Assert.assertEquals;
+
+import java.awt.image.BufferedImage;
+import java.io.ByteArrayInputStream;
+import java.io.IOException;
+import java.nio.ByteBuffer;
+
+import javax.imageio.ImageIO;
+
+import org.eclipse.jetty.http.HttpTester;
+import org.eclipse.jetty.servlet.ServletContextHandler;
+import org.eclipse.jetty.servlet.ServletTester;
+import org.junit.BeforeClass;
+import org.junit.Test;
+
+import digilib.conf.DigilibServlet3Configuration;
+
+/**
+ * ScalerTest -- tests for the digilib Scaler servlet
+ * 
+ * @author casties
+ *
+ */
+public class ScalerTest {
+
+    private static ServletTester tester;
+    
+    public static String testFileName = "xterm_color_chart";
+
+    @BeforeClass
+    public static void startServer() throws Exception {
+        tester = new ServletTester();
+        ServletContextHandler ctx = tester.getContext();
+        // set up ServletContext
+        ctx.setContextPath("/");
+        ctx.setResourceBase("src/main/webapp");       
+        ctx.setClassLoader(ServletTester.class.getClassLoader());
+        // add digilib ContextListener
+        DigilibServlet3Configuration dlConfig = new DigilibServlet3Configuration();
+        ctx.addEventListener(dlConfig);
+        tester.addServlet(Scaler.class, "/Scaler/*");
+        // start the servlet
+        tester.start();
+    }
+
+    /**
+     * Requests the image file testFileName from the Scaler with the given parameters and returns the image.
+     * 
+     * Checks the returned content-type (if contentType != null).
+     *  
+     * @param params
+     * @param contentType
+     * @return
+     * @throws Exception
+     * @throws IOException
+     */
+    private BufferedImage loadImage(String params, String contentType) throws Exception, IOException {
+        // prepare request
+        HttpTester.Request request = HttpTester.newRequest();
+        request.setMethod("GET");
+        request.setHeader("Host", "tester"); // should be "tester"
+        request.setURI("/Scaler?fn="+testFileName+"&"+params);
+        request.setContent("");
+        ByteBuffer reqBuf = request.generate();
+        // get response
+        ByteBuffer respBuf = tester.getResponses(reqBuf);
+        // parse response
+        HttpTester.Response response = HttpTester.parseResponse(respBuf);
+        // should be 200 - OK
+        assertEquals("status code", 200, response.getStatus());
+        // check content-type
+        if (contentType != null) {
+            String ct = response.getStringField("content-type");
+            assertEquals("content-type", contentType, ct);
+        }
+        // load response as image
+        ByteArrayInputStream bis = new ByteArrayInputStream(response.getContentBytes());
+        BufferedImage img = ImageIO.read(bis);
+        return img;
+    }
+
+    /**
+     * Test scaling with mo=fit
+     * @throws Exception
+     */
+    @Test
+    public void testScaleFit() throws Exception {
+        BufferedImage img = loadImage("ww=0.0836&wh=0.0378&wx=0&wy=0.961&dw=173&dh=235&mo=fit,errcode", null);
+        assertEquals("height", 125, img.getHeight());
+        assertEquals("width", 173, img.getWidth());
+    }
+
+    /**
+     * Test scaling with mo=squeeze
+     * @throws Exception
+     */
+    @Test
+    public void testScaleSqueeze() throws Exception {
+        BufferedImage img = loadImage("ww=0.0836&wh=0.0378&wx=0&wy=0.961&dw=173&dh=235&mo=squeeze,errcode", null);
+        assertEquals("height", 235, img.getHeight());
+        assertEquals("width", 173, img.getWidth());        
+    }
+
+    /**
+     * Test scaling with mo=clip
+     * @throws Exception
+     */
+    @Test
+    public void testScaleClip() throws Exception {
+        BufferedImage img = loadImage("ww=0.0836&wh=0.0378&wx=0&wy=0.961&dw=173&dh=235&mo=clip,errcode", null);
+        assertEquals("height", 60, img.getHeight());
+        assertEquals("width", 173, img.getWidth());        
+    }
+
+    /**
+     * Test scaling with mo=ascale
+     * @throws Exception
+     */
+    @Test
+    public void testScaleAbsolute() throws Exception {
+        BufferedImage img = loadImage("mo=ascale&scale=0.1&mo=errcode", null);
+        assertEquals("height", 154, img.getHeight());
+        assertEquals("width", 96, img.getWidth());        
+    }
+
+    /**
+     * Test forced image type with mo=jpg
+     * @throws Exception
+     */
+    @Test
+    public void testTypeJpg() throws Exception {
+        BufferedImage img = loadImage("ww=0.0836&wh=0.0378&wx=0&wy=0.961&dw=173&dh=235&mo=jpg,errcode", "image/jpeg");
+        int px = img.getRGB(100, 100);
+        assertEquals("pixel color", -8421505, px);
+    }
+
+    /**
+     * Test forced image type with mo=png
+     * @throws Exception
+     */
+    @Test
+    public void testTypePng() throws Exception {
+        BufferedImage img = loadImage("ww=0.0836&wh=0.0378&wx=0&wy=0.961&dw=173&dh=235&mo=png,errcode", "image/png");
+        int px = img.getRGB(100, 100);
+        assertEquals("pixel color", -8421505, px);
+    }
+
+
+}