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[utils] / support / general / src / test / java / org / wamblee / xml / XslTransformerTest.java
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+/*
+ * Copyright 2005 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.xml;
+
+import java.io.ByteArrayOutputStream;
+import java.io.File;
+import java.io.IOException;
+
+import javax.xml.parsers.DocumentBuilder;
+import javax.xml.parsers.DocumentBuilderFactory;
+import javax.xml.transform.Result;
+import javax.xml.transform.Source;
+import javax.xml.transform.TransformerException;
+import javax.xml.transform.stream.StreamResult;
+import javax.xml.transform.stream.StreamSource;
+
+import junit.framework.TestCase;
+import org.wamblee.io.ClassPathResource;
+import org.wamblee.io.FileSystemUtils;
+import org.wamblee.io.InputResource;
+
+import org.w3c.dom.Document;
+
+/**
+ * Tests the XSL transformer.
+ *
+ * @author Erik Brakkee
+ */
+public class XslTransformerTest extends TestCase {
+
+    private static final String INCLUDED_XSL_FILE = "utilities.xsl";
+
+       private static final String REPORT_XML = "report.xml";
+
+    private static final String REPORT_TO_HTML_XSLT = "reportToHtml.xsl";
+
+    private static final String REPORT_TO_HTML2_XSLT = "reportToHtml2.xsl";
+    
+    private static final String REPORT_TO_HTML_INVALID_XSLT = "reportToHtml-invalid.xsl";
+    
+    private static final String REPORT_TO_HTML_NONWELLFORMED_XSLT = "reportToHtml-nonwellformed.xsl";
+    
+    private static final String REPORT_TO_TEXT_XSLT = "reportToText.xsl";
+
+    private String getResourcePath(String aResource) { 
+       return getClass().getPackage().getName().replaceAll("\\.", "/") + "/" + aResource;
+    }
+
+    /**
+     * Transforms a file while using the default resolver, where the included
+     * file can be found. Verifies the transformation is done correctly.
+     * 
+     */
+    public void testTransformUsingDefaultResolver() throws Exception {
+        XslTransformer transformer = new XslTransformer();
+
+        InputResource xmlResource = new ClassPathResource(getResourcePath(REPORT_XML));
+        
+        Source xslt = new StreamSource(new ClassPathResource(getResourcePath(
+                       REPORT_TO_HTML_XSLT)).getInputStream());
+
+        byte[] documentData = FileSystemUtils
+                .read(xmlResource.getInputStream()).getBytes();
+        DocumentBuilder builder = DocumentBuilderFactory.newInstance()
+                .newDocumentBuilder();
+        Document document = builder.parse(xmlResource.getInputStream());
+        Source documentSource = new StreamSource(xmlResource.getInputStream());
+
+        Document expected = DomUtils.read(new ClassPathResource(getResourcePath(
+                       "output-reportToHtml-report.xml")).getInputStream());
+
+        Document output1 = transformer.transform(documentData, xslt);
+        XmlUtils.assertEquals("byte[] transform", expected, output1);
+
+        xslt = new StreamSource(new ClassPathResource(getResourcePath(
+                       REPORT_TO_HTML_XSLT)).getInputStream());
+        Document output2 = transformer.transform(document, xslt);
+        XmlUtils.assertEquals("document transform", expected, output2);
+
+        ByteArrayOutputStream os = new ByteArrayOutputStream();
+        Result output = new StreamResult(os);
+        
+        xslt = new StreamSource(new ClassPathResource(getResourcePath(
+                       REPORT_TO_HTML_XSLT)).getInputStream());
+        transformer.transform(documentSource, output, xslt);
+        XmlUtils.assertEquals("document source transform", expected, DomUtils
+                .read(os.toString()));
+
+        xslt = new StreamSource(new ClassPathResource(getResourcePath(
+                       REPORT_TO_HTML_XSLT)).getInputStream());
+        String result = transformer.textTransform(documentData, xslt);
+        XmlUtils
+                .assertEquals("text transform", expected, DomUtils.read(result));
+    }
+
+    /**
+     * Transforms a file using the default resolver where the included file
+     * cannot be found. Verifies that a TransformerException is thrown.
+     * 
+     */
+    public void testTransformUsingDefaultResolverFails() throws IOException {
+        XslTransformer transformer = new XslTransformer();
+
+        InputResource xmlResource = 
+                       new ClassPathResource(getResourcePath(REPORT_XML));
+        Source xslt = new StreamSource(
+                       new ClassPathResource(getResourcePath(
+                                       REPORT_TO_HTML2_XSLT)).getInputStream());
+
+        byte[] documentData = FileSystemUtils
+                .read(xmlResource.getInputStream()).getBytes();
+        try {
+            Document output1 = transformer.transform(documentData, xslt);
+        } catch (TransformerException e) {
+            return; // ok
+        }
+        fail();
+    }
+
+    /**
+     * Transforms a file using an invalid Xslt. Verifies that a
+     * TransformerException is thrown.
+     * 
+     */
+    public void testTransformInvalidXslt() throws IOException {
+        XslTransformer transformer = new XslTransformer();
+
+        InputResource xmlResource = new ClassPathResource(
+                       getResourcePath(REPORT_XML));
+        Source xslt = new StreamSource(
+                       new ClassPathResource(getResourcePath(REPORT_TO_HTML_INVALID_XSLT)).getInputStream());
+
+        byte[] documentData = FileSystemUtils
+                .read(xmlResource.getInputStream()).getBytes();
+        try {
+            Document output1 = transformer.transform(documentData, xslt);
+        } catch (TransformerException e) {
+            return; // ok
+        }
+        fail();
+    }
+
+    /**
+     * Transforms a file using a non-well formed xslt. Verifies that a
+     * TransformerException is thrown.
+     * 
+     */
+    public void testTransformNonWellformedXslt() throws IOException {
+        XslTransformer transformer = new XslTransformer();
+
+        InputResource xmlResource = new ClassPathResource(
+                       getResourcePath(REPORT_XML));
+        Source xslt = new StreamSource(
+                       new ClassPathResource(getResourcePath(
+                                       REPORT_TO_HTML_NONWELLFORMED_XSLT)).getInputStream());
+
+        byte[] documentData = FileSystemUtils
+                .read(xmlResource.getInputStream()).getBytes();
+        try {
+            Document output1 = transformer.transform(documentData, xslt);
+        } catch (TransformerException e) {
+            return; // ok
+        }
+        fail();
+    }
+
+    /**
+     * Transforms a file using a class path resolver.
+     * 
+     */
+    public void testTransformUsingClassPathResolver() throws Exception {
+        XslTransformer transformer = new XslTransformer(new ClasspathUriResolver());
+
+        InputResource xmlResource = new ClassPathResource(getResourcePath(
+                       REPORT_XML));
+        Source xslt = new StreamSource(new ClassPathResource(
+                       getResourcePath(REPORT_TO_HTML2_XSLT)).getInputStream());
+
+        byte[] documentData = FileSystemUtils
+                .read(xmlResource.getInputStream()).getBytes();
+        
+        Document output1 = transformer.transform(documentData, xslt);
+        Document expected = DomUtils.read(new ClassPathResource(
+                       getResourcePath("output-reportToHtml-report.xml"))
+                .getInputStream());
+        XmlUtils.assertEquals("doc", expected, output1);
+    }
+
+    /**
+     * Transforms a file to text output. Verifies the file is transformed
+     * correctly.
+     * 
+     */
+    public void testTransformToTextOutput() throws Exception {
+        XslTransformer transformer = new XslTransformer(new ClasspathUriResolver());
+
+        InputResource xmlResource = new ClassPathResource(
+                       getResourcePath(REPORT_XML));
+        Source xslt = new StreamSource(
+                       new ClassPathResource(getResourcePath(REPORT_TO_TEXT_XSLT)).getInputStream());
+
+        byte[] documentData = FileSystemUtils
+                .read(xmlResource.getInputStream()).getBytes();
+   
+        String result = transformer.textTransform(documentData, xslt);
+        String expected = "Hello world!";
+        assertEquals("text transform", expected, result);
+    }
+    /**
+     * Tests resolving a file using {@link XslTransformer#resolve(String)} with the 
+     * default resolver where the file does not exist. 
+     *
+     */
+    public void testResolveWithDefaultResolverFileNotFound() { 
+        XslTransformer transformer = new XslTransformer();
+        try { 
+            Source source = transformer.resolve("org/wamblee/xml/utilities-nonexistent.xsl");
+        } catch (TransformerException e) { 
+            return; // ok
+        }
+        fail();
+    }
+    
+    
+    /**
+     * Tests resolving a file using {@link XslTransformer#resolve(String)} with the 
+     * default resolver. 
+     *
+     */
+    public void testResolveWithClasspathResolver() throws Exception { 
+        XslTransformer transformer = new XslTransformer(new ClasspathUriResolver());
+        Source source = transformer.resolve(getResourcePath(INCLUDED_XSL_FILE));
+        assert(source instanceof StreamSource);
+        StreamSource ssource = (StreamSource)source;
+        String data = FileSystemUtils.read(ssource.getInputStream());
+        String expected = FileSystemUtils.read(new ClassPathResource(getResourcePath(INCLUDED_XSL_FILE)).getInputStream());
+        assertEquals(expected, data);
+    }
+    
+}
+
+