testuppercaseworkbook.java

介绍java核心技术的pio编程方法以及基本概念

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* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements.  See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.apache.poi.hssf.usermodel;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.FileInputStream;
import java.io.FileNotFoundException;

import org.apache.poi.poifs.filesystem.POIFSFileSystem;

import junit.framework.TestCase;

/**
 * Tests for how HSSFWorkbook behaves with XLS files
 *  with a WORKBOOK directory entry (instead of the more
 *  usual, Workbook)
 */
public class TestUppercaseWorkbook extends TestCase {
	private String dirPath;
	private String xlsA = "WORKBOOK_in_capitals.xls";

	protected void setUp() throws Exception {
		super.setUp();
		
        dirPath = System.getProperty("HSSF.testdata.path");
	}

	/**
	 * Test that we can open a file with WORKBOOK
	 */
	public void testOpen() throws Exception {
		FileInputStream is = new FileInputStream(dirPath + "/" + xlsA);
		
		POIFSFileSystem fs = new POIFSFileSystem(is);

		// Ensure that we have a WORKBOOK entry
		fs.getRoot().getEntry("WORKBOOK");
		// And a summary
		fs.getRoot().getEntry("\005SummaryInformation");
		assertTrue(true);

		// But not a Workbook one
		try {
			fs.getRoot().getEntry("Workbook");
			fail();
		} catch(FileNotFoundException e) {}
		
		// Try to open the workbook
		HSSFWorkbook wb = new HSSFWorkbook(fs);
	}

	/**
	 * Test that when we write out, we go back to the correct case
	 */
	public void testWrite() throws Exception {
		FileInputStream is = new FileInputStream(dirPath + "/" + xlsA);
		POIFSFileSystem fs = new POIFSFileSystem(is);

		// Open the workbook, not preserving nodes
		HSSFWorkbook wb = new HSSFWorkbook(fs);
		ByteArrayOutputStream out = new ByteArrayOutputStream();
		wb.write(out);

		// Check now
		ByteArrayInputStream in = new ByteArrayInputStream(out.toByteArray());
		POIFSFileSystem fs2 = new POIFSFileSystem(in);

		// Check that we have the new entries
		fs2.getRoot().getEntry("Workbook");
		try {
			fs2.getRoot().getEntry("WORKBOOK");
			fail();
		} catch(FileNotFoundException e) {}

		// And it can be opened
		HSSFWorkbook wb2 = new HSSFWorkbook(fs2);
	}

	/**
	 * Test that when we write out preserving nodes, we go back to the
	 *  correct case
	 */
	public void testWritePreserve() throws Exception {
		FileInputStream is = new FileInputStream(dirPath + "/" + xlsA);
		POIFSFileSystem fs = new POIFSFileSystem(is);

		// Open the workbook, not preserving nodes
		HSSFWorkbook wb = new HSSFWorkbook(fs,true);

		ByteArrayOutputStream out = new ByteArrayOutputStream();
		wb.write(out);

		// Check now
		ByteArrayInputStream in = new ByteArrayInputStream(out.toByteArray());
		POIFSFileSystem fs2 = new POIFSFileSystem(in);

		// Check that we have the new entries
		fs2.getRoot().getEntry("Workbook");
		try {
			fs2.getRoot().getEntry("WORKBOOK");
			fail();
		} catch(FileNotFoundException e) {}

		// As we preserved, should also have a few other streams
		fs2.getRoot().getEntry("\005SummaryInformation");

		// And it can be opened
		HSSFWorkbook wb2 = new HSSFWorkbook(fs2);
	}
}