/*
 * Copyright (c) 2008, Aaron Digulla
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in
 *       the documentation and/or other materials provided with the
 *       distribution.
 *     * Neither the name of Aaron Digulla nor the names of its
 *       contributors may be used to endorse or promote products derived
 *       from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
 * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package de.pdark.decentxml;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.fail;

import java.io.ByteArrayInputStream;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.StringReader;
import org.junit.Test;

public class XMLSourceTest {
  @Test
  public void testXMLStringBufferSource() throws Exception {
    StringBuffer buffer = new StringBuffer("<x a='1'>n</x>");
    XMLParser parser = new XMLParser();
    Document doc = parser.parse(new XMLStringBufferSource(buffer));
    assertEquals(buffer.toString(), doc.toXML());
  }

  @Test
  public void testXMLStringBuilderSource() throws Exception {
    StringBuilder buffer = new StringBuilder("<x a='1'>n</x>");
    XMLParser parser = new XMLParser();
    Document doc = parser.parse(new XMLStringBuilderSource(buffer));
    assertEquals(buffer.toString(), doc.toXML());
  }

  @Test
  public void testXMLIOSource1() throws Exception {
    XMLIOSource source =
        new XMLIOSource(
            new ByteArrayInputStream(XMLInputStreamReaderTest.TEST_XML.getBytes("utf-8")));
    XMLParser parser = new XMLParser();
    Document doc = parser.parse(source);
    assertEquals(XMLInputStreamReaderTest.TEST_XML, doc.toXML());
  }

  @Test
  public void testXMLIOSource2() throws Exception {
    XMLIOSource source = new XMLIOSource(new StringReader(XMLInputStreamReaderTest.TEST_XML));
    XMLParser parser = new XMLParser();
    Document doc = parser.parse(source);
    assertEquals(XMLInputStreamReaderTest.TEST_XML, doc.toXML());
  }

  @Test
  public void testFileSource() throws Exception {
    XMLIOSource source = new XMLIOSource(new File("pom.xml"));
    XMLParser parser = new XMLParser();
    Document doc = parser.parse(source);
    assertEquals("DecentXML", doc.getChild("/project/name").getText());
  }

  @Test
  public void testURLSource() throws Exception {
    File f = new File("pom.xml").getAbsoluteFile();
    XMLIOSource source = new XMLIOSource(f.toURL());
    XMLParser parser = new XMLParser();
    Document doc = parser.parse(source);
    assertEquals("DecentXML", doc.getChild("/project/name").getText());
  }

  @Test
  public void testExceptionDuringRead() throws Exception {
    try {
      XMLIOSource.toString(new IOExceptionInputStream());
      fail("No exception was thrown");
    } catch (XMLParseException e) {
      assertEquals("Line 1, column 1: Error parsing XML declaration: Test Error", e.getMessage());
    }
  }

  @Test
  public void testExceptionDuringClose() throws Exception {
    InputStream reader =
        new InputStream() {
          @Override
          public void close() throws IOException {
            throw new IOException("close failed");
          }

          @Override
          public int read() throws IOException {
            return -1;
          }
        };

    try {
      XMLIOSource.toString(reader);
      fail("No exception was thrown");
    } catch (IOException e) // Break of symmetry: Other places throw a XMLParseException
    {
      assertEquals("close failed", e.getMessage());
    }
  }

  @Test
  public void testExceptionShadowing() throws Exception {
    InputStream reader =
        new InputStream() {
          @Override
          public void close() throws IOException {
            // This exception must not shadow the exception in read()
            throw new IOException("close failed");
          }

          @Override
          public int read() throws IOException {
            throw new IOException("read failed");
          }
        };

    try {
      XMLIOSource.toString(reader);
      fail("No exception was thrown");
    } catch (XMLParseException e) {
      assertEquals("Line 1, column 1: Error parsing XML declaration: read failed", e.getMessage());
    }
  }

  @Test
  public void testToString() throws Exception {
    assertEquals("", XMLIOSource.toString(new ByteArrayInputStream(new byte[0])));
  }
}