src/testcases/org/apache/poi/poifs/filesystem/TestOffice2007XMLException.java

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   this work for additional information regarding copyright ownership.
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       http://www.apache.org/licenses/LICENSE-2.0

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package org.apache.poi.poifs.filesystem;

import junit.framework.TestCase;
import java.io.*;

import org.apache.poi.hssf.HSSFTestDataSamples;

/**
 * Class to test that POIFS complains when given an Office 2007 XML document
 *
 * @author Marc Johnson
 */
public class TestOffice2007XMLException extends TestCase {

	private static final InputStream openSampleStream(String sampleFileName) {
		return HSSFTestDataSamples.openSampleFileStream(sampleFileName);
	}
	public void testXMLException() throws IOException
	{
		InputStream in = openSampleStream("sample.xlsx");

		try {
			new POIFSFileSystem(in);
			fail("expected exception was not thrown");
		} catch(OfficeXmlFileException e) {
			// expected during successful test
			assertTrue(e.getMessage().indexOf("POI only supports OLE2 Office documents") > 0);
		}
	}
	
	public void testDetectAsPOIFS() {
		
		// ooxml file isn't
		confirmIsPOIFS("SampleSS.xlsx", false);
		
		// xls file is
		confirmIsPOIFS("SampleSS.xls", true);
		
		// text file isn't
		confirmIsPOIFS("SampleSS.txt", false);
	}
	private void confirmIsPOIFS(String sampleFileName, boolean expectedResult) {
		InputStream in  = new PushbackInputStream(openSampleStream(sampleFileName), 10);
		boolean actualResult;
		try {
			actualResult = POIFSFileSystem.hasPOIFSHeader(in);
		} catch (IOException e) {
			throw new RuntimeException(e);
		}
		assertEquals(expectedResult, actualResult);
	}
}