testsharedformularecord.java

来自「EXCEL read and write」· Java 代码 · 共 89 行

/* ====================================================================
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   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
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       http://www.apache.org/licenses/LICENSE-2.0

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   distributed under the License is distributed on an "AS IS" BASIS,
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   See the License for the specific language governing permissions and
   limitations under the License.
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package org.apache.poi.hssf.record;

import junit.framework.AssertionFailedError;
import junit.framework.ComparisonFailure;
import junit.framework.TestCase;

import org.apache.poi.hssf.record.formula.Ptg;
import org.apache.poi.hssf.record.formula.RefPtg;

/**
 * @author Josh Micich
 */
public final class TestSharedFormulaRecord extends TestCase {

	/**
	 * Binary data for an encoded formula.  Taken from attachment 22062 (bugzilla 45123/45421).
	 * The shared formula is in Sheet1!C6:C21, with text "SUMPRODUCT(--(End_Acct=$C6),--(End_Bal))"
	 * This data is found at offset 0x1A4A (within the shared formula record).
	 * The critical thing about this formula is that it contains shared formula tokens (tRefN*,
	 * tAreaN*) with operand class 'array'.
	 */
	private static final byte[] SHARED_FORMULA_WITH_REF_ARRAYS_DATA = {
		0x1A, 0x00,
		0x63, 0x02, 0x00, 0x00, 0x00,
		0x6C, 0x00, 0x00, 0x02, (byte)0x80,  // tRefNA
		0x0B,
		0x15,
		0x13,
		0x13,
		0x63, 0x03, 0x00, 0x00, 0x00,
		0x15,
		0x13,
		0x13,
		0x42, 0x02, (byte)0xE4, 0x00,
	};
	
	/**
	 * The method <tt>SharedFormulaRecord.convertSharedFormulas()</tt> converts formulas from
	 * 'shared formula' to 'single cell formula' format.  It is important that token operand
	 * classes are preserved during this transformation, because Excel may not tolerate the
	 * incorrect encoding.  The formula here is one such example (Excel displays #VALUE!).
	 */
	public void testConvertSharedFormulasOperandClasses_bug45123() {
		
		RecordInputStream in = TestcaseRecordInputStream.createWithFakeSid(SHARED_FORMULA_WITH_REF_ARRAYS_DATA);
		int encodedLen = in.readUShort();
		Ptg[] sharedFormula = Ptg.readTokens(encodedLen, in);
		
		Ptg[] convertedFormula = SharedFormulaRecord.convertSharedFormulas(sharedFormula, 100, 200);
		
		RefPtg refPtg = (RefPtg) convertedFormula[1];
		assertEquals("$C101", refPtg.toFormulaString());
		if (refPtg.getPtgClass() == Ptg.CLASS_REF) {
			throw new AssertionFailedError("Identified bug 45123");
		}
		
		confirmOperandClasses(sharedFormula, convertedFormula);
	}

	private static void confirmOperandClasses(Ptg[] originalPtgs, Ptg[] convertedPtgs) {
		assertEquals(originalPtgs.length, convertedPtgs.length);
		for (int i = 0; i < convertedPtgs.length; i++) {
			Ptg originalPtg = originalPtgs[i];
			Ptg convertedPtg = convertedPtgs[i];
			if (originalPtg.getPtgClass() != convertedPtg.getPtgClass()) {
				throw new ComparisonFailure("Different operand class for token[" + i + "]",
						String.valueOf(originalPtg.getPtgClass()), String.valueOf(convertedPtg.getPtgClass()));
			}
		}
	}
}