poi/src/scratchpad/testcases/org/apache/poi/hwpf/usermodel/TestRangeDelete.java

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   this work for additional information regarding copyright ownership.
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package org.apache.poi.hwpf.usermodel;

import java.io.FileInputStream;

import junit.framework.TestCase;

import org.apache.poi.hwpf.HWPFDocument;
import org.apache.poi.hwpf.model.PAPX;

/**
 *	Test to see if Range.delete() works even if the Range contains a
 *	CharacterRun that uses Unicode characters.
 */
public class TestRangeDelete extends TestCase {

	// u201c and u201d are "smart-quotes"
	private String introText = 
		"Introduction\r";
	private String fillerText = 
		"${delete} This is an MS-Word 97 formatted document created using NeoOffice v. 2.2.4 Patch 0 (OpenOffice.org v. 2.2.1).\r";
	private String originalText =
		"It is used to confirm that text delete works even if Unicode characters (such as \u201c\u2014\u201d (U+2014), \u201c\u2e8e\u201d (U+2E8E), or \u201c\u2714\u201d (U+2714)) are present.  Everybody should be thankful to the ${organization} ${delete} and all the POI contributors for their assistance in this matter.\r";
	private String lastText =
		"Thank you, ${organization} ${delete}!\r";
	private String searchText = "${delete}";
	private String expectedText1 = " This is an MS-Word 97 formatted document created using NeoOffice v. 2.2.4 Patch 0 (OpenOffice.org v. 2.2.1).\r";
	private String expectedText2 =
		"It is used to confirm that text delete works even if Unicode characters (such as \u201c\u2014\u201d (U+2014), \u201c\u2e8e\u201d (U+2E8E), or \u201c\u2714\u201d (U+2714)) are present.  Everybody should be thankful to the ${organization}  and all the POI contributors for their assistance in this matter.\r";
	private String expectedText3 = "Thank you, ${organization} !\r";

	private String illustrativeDocFile;

	protected void setUp() throws Exception {

		String dirname = System.getProperty("HWPF.testdata.path");

		illustrativeDocFile = dirname + "/testRangeDelete.doc";
	}

	/**
	 * Test just opening the files
	 */
	public void testOpen() throws Exception {

		HWPFDocument docA = new HWPFDocument(new FileInputStream(illustrativeDocFile));
	}

	/**
	 * Test (more "confirm" than test) that we have the general structure that we expect to have.
	 */
	public void testDocStructure() throws Exception {

		HWPFDocument daDoc = new HWPFDocument(new FileInputStream(illustrativeDocFile));
		Range range;
		Section section;
		Paragraph para;
		PAPX paraDef;

		// First, check overall
		range = daDoc.getOverallRange();
		assertEquals(1, range.numSections());
		assertEquals(5, range.numParagraphs());
		
		
		// Now, onto just the doc bit
		range = daDoc.getRange();

		assertEquals(1, range.numSections());
		assertEquals(1, daDoc.getSectionTable().getSections().size());
		section = range.getSection(0);
		
		assertEquals(5, section.numParagraphs());
		
		para = section.getParagraph(0);
		assertEquals(1, para.numCharacterRuns());
		assertEquals(introText, para.text());
		
		para = section.getParagraph(1);
		assertEquals(5, para.numCharacterRuns());
		assertEquals(fillerText, para.text());
		
		
		paraDef = (PAPX)daDoc.getParagraphTable().getParagraphs().get(2);
		assertEquals(132, paraDef.getStart());
		assertEquals(400, paraDef.getEnd());
		
		para = section.getParagraph(2);
		assertEquals(5, para.numCharacterRuns());
		assertEquals(originalText, para.text());
		
		
		paraDef = (PAPX)daDoc.getParagraphTable().getParagraphs().get(3);
		assertEquals(400, paraDef.getStart());
		assertEquals(438, paraDef.getEnd());
		
		para = section.getParagraph(3);
		assertEquals(1, para.numCharacterRuns());
		assertEquals(lastText, para.text());
		
		
		// Check things match on text length
		assertEquals(439, range.text().length());
		assertEquals(439, section.text().length());
		assertEquals(439, 
				section.getParagraph(0).text().length() +
				section.getParagraph(1).text().length() +
				section.getParagraph(2).text().length() +
				section.getParagraph(3).text().length() +
				section.getParagraph(4).text().length()
		);
	}

	/**
	 * Test that we can delete text (one instance) from our Range with Unicode text.
	 */
	public void testRangeDeleteOne() throws Exception {

		HWPFDocument daDoc = new HWPFDocument(new FileInputStream(illustrativeDocFile));

		Range range = daDoc.getOverallRange();
		assertEquals(1, range.numSections());

		Section section = range.getSection(0);
		assertEquals(5, section.numParagraphs());

		Paragraph para = section.getParagraph(2);

		String text = para.text();
		assertEquals(originalText, text);

		int offset = text.indexOf(searchText);
		assertEquals(192, offset);

		int absOffset = para.getStartOffset() + offset;
		Range subRange = new Range(absOffset, (absOffset + searchText.length()), para.getDocument());

		assertEquals(searchText, subRange.text());

		subRange.delete();

		// we need to let the model re-calculate the Range before we evaluate it
		range = daDoc.getRange();

		assertEquals(1, range.numSections());
		section = range.getSection(0);

		assertEquals(5, section.numParagraphs());
		para = section.getParagraph(2);

		text = para.text();
		assertEquals(expectedText2, text);

		// this can lead to a StringBufferOutOfBoundsException, so we will add it
		// even though we don't have an assertion for it
		Range daRange = daDoc.getRange();
		daRange.text();
	}

	/**
	 * Test that we can delete text (all instances of) from our Range with Unicode text.
	 */
	public void testRangeDeleteAll() throws Exception {

		HWPFDocument daDoc = new HWPFDocument(new FileInputStream(illustrativeDocFile));

		Range range = daDoc.getRange();
		assertEquals(1, range.numSections());

		Section section = range.getSection(0);
		assertEquals(5, section.numParagraphs());

		Paragraph para = section.getParagraph(2);

		String text = para.text();
		assertEquals(originalText, text);

		boolean keepLooking = true;
		while (keepLooking) {
			// Reload the range every time
			range = daDoc.getRange();
			int offset = range.text().indexOf(searchText);
			if (offset >= 0) {

				int absOffset = range.getStartOffset() + offset;

				Range subRange = new Range(
					absOffset, (absOffset + searchText.length()), range.getDocument());

				assertEquals(searchText, subRange.text());

				subRange.delete();

			} else {
				keepLooking = false;
			}
		}

		// we need to let the model re-calculate the Range before we use it
		range = daDoc.getRange();

		assertEquals(1, range.numSections());
		section = range.getSection(0);

		assertEquals(5, section.numParagraphs());

		para = section.getParagraph(0);
		text = para.text();
		assertEquals(introText, text);

		para = section.getParagraph(1);
		text = para.text();
		assertEquals(expectedText1, text);

		para = section.getParagraph(2);
		text = para.text();
		assertEquals(expectedText2, text);

		para = section.getParagraph(3);
		text = para.text();
		assertEquals(expectedText3, text);
	}
}