testlen.java

来自「EXCEL read and write」· Java 代码 · 共 74 行

/* ====================================================================
   Licensed to the Apache Software Foundation (ASF) under one or more
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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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package org.apache.poi.hssf.record.formula.functions;

import junit.framework.TestCase;

import org.apache.poi.hssf.record.formula.eval.BlankEval;
import org.apache.poi.hssf.record.formula.eval.BoolEval;
import org.apache.poi.hssf.record.formula.eval.ErrorEval;
import org.apache.poi.hssf.record.formula.eval.Eval;
import org.apache.poi.hssf.record.formula.eval.NumberEval;
import org.apache.poi.hssf.record.formula.eval.StringEval;
/**
 * Tests for Excel function LEN()
 * 
 * @author Josh Micich
 */
public final class TestLen extends TestCase {

	
	private static Eval invokeLen(Eval text) {
		Eval[] args = new Eval[] { text, };
		return TextFunction.LEN.evaluate(args, -1, (short)-1);
	}

	private void confirmLen(Eval text, int expected) {
		Eval result = invokeLen(text);
		assertEquals(NumberEval.class, result.getClass());
		assertEquals(expected, ((NumberEval)result).getNumberValue(), 0);
	}

	private void confirmLen(Eval text, ErrorEval expectedError) {
		Eval result = invokeLen(text);
		assertEquals(ErrorEval.class, result.getClass());
		assertEquals(expectedError.getErrorCode(), ((ErrorEval)result).getErrorCode());
	}
	
	public void testBasic() {
		
		confirmLen(new StringEval("galactic"), 8);
	}
	
	/**
	 * Valid cases where text arg is not exactly a string
	 */
	public void testUnusualArgs() {
		
		// text (first) arg type is number, other args are strings with fractional digits 
		confirmLen(new NumberEval(123456), 6);
		confirmLen(BoolEval.FALSE, 5);
		confirmLen(BoolEval.TRUE, 4);
		confirmLen(BlankEval.INSTANCE, 0);
	}

	public void testErrors() {
		confirmLen(ErrorEval.NAME_INVALID, ErrorEval.NAME_INVALID);
	}
}