/*
 * Copyright 2005-2010 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 static org.wamblee.xml.XMLDocument.*;
import junit.framework.TestCase;

import org.junit.Before;
import org.junit.Test;
import org.w3c.dom.ls.LSInput;
import org.w3c.dom.ls.LSResourceResolver;
import org.wamblee.io.ClassPathResource;
import org.wamblee.io.FileSystemUtils;

import java.io.IOException;

import javax.xml.transform.Source;
import javax.xml.transform.TransformerException;
import javax.xml.transform.URIResolver;
import javax.xml.transform.stream.StreamSource;

import static junit.framework.TestCase.*;

/**
 * Tests for {@link org.wamblee.xml.ClasspathUriResolver}.
 * 
 * @author Erik Brakkee
 */
public class ClasspathUriResolverTest {
    private static final String REPORT_TO_HTML_XSL = "reportToHtml.xsl";
    private static final String PREFIX = "org/wamblee/xml";
    private static final String EXISTING_RESOURCE = PREFIX + "/" + REPORT_TO_HTML_XSL;
    private static final String NON_EXISTING_RESOURCE = "org/wamblee/xml/reportToHtml-nonexisting.xsl";
    private ClasspathUriResolver resolver;

    /*
     * (non-Javadoc)
     * 
     * @see junit.framework.TestCase#setUp()
     */
    @Before
    public void setUp() throws Exception {
        resolver = new ClasspathUriResolver();
    }

    /**
     * Resolves a non-existing file. Verifies that a TransformerException is
     * thrown.
     * 
     */
    @Test
    public void testResolveNonExistingFileURIResolver() {
        try {
            resolver
                .resolve(NON_EXISTING_RESOURCE, "");
        } catch (TransformerException e) {
            return; // ok
        }

        fail();
    }

    /**
     * Resolves an existing file. Verifies the file is resolved correctly.
     * 
     * @throws TransformerException
     * @throws IOException
     */
    @Test
    public void testResolveExistingFileLSResourceResolver()
        throws TransformerException, IOException {
        LSInput source = resolver.resolveResource(null, null, "kees",
            EXISTING_RESOURCE, null);
        assertNotNull(source);
        
        assertEquals("kees", source.getPublicId());
        assertEquals(EXISTING_RESOURCE, source.getSystemId());

        String resolved = FileSystemUtils.read(source.getByteStream());

        ClassPathResource resource = new ClassPathResource(
            EXISTING_RESOURCE);
        String expected = FileSystemUtils.read(resource.getInputStream());
        assertEquals(expected, resolved);
    }
    
    /**
     * Resolves an existing file using a base path. Verifies the file is resolved correctly.
     * 
     * @throws TransformerException
     * @throws IOException
     */
    @Test
    public void testResolveExistingFileLSResourceResolverUsingBasePath()
        throws TransformerException, IOException {
        
        resolver = new ClasspathUriResolver(PREFIX);
        LSInput source = resolver.resolveResource(null, null, "kees",
            REPORT_TO_HTML_XSL, null);
        assertNotNull(source);
        
        assertEquals("kees", source.getPublicId());
        assertEquals(REPORT_TO_HTML_XSL, source.getSystemId());

        String resolved = FileSystemUtils.read(source.getByteStream());

        ClassPathResource resource = new ClassPathResource(
            EXISTING_RESOURCE);
        String expected = FileSystemUtils.read(resource.getInputStream());
        assertEquals(expected, resolved);
    }

    /**
     * Resolves a non-existing file. Verifies that a TransformerException is
     * thrown.
     * 
     */
    @Test
    public void testResolveNonExistingFileLSResourceResolver() {
        LSInput input = resolver.resolveResource(null, null, "kees",
            NON_EXISTING_RESOURCE, null);
        assertNull(input);
    }
}