testtfunc.java

来自「EXCEL read and write」· Java 代码 · 共 117 行

/* ====================================================================
   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.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;
import org.apache.poi.hssf.record.formula.eval.ValueEval;

/**
 * Test cases for Excel function T()
 * 
 * @author Josh Micich
 */
public final class TestTFunc extends TestCase {

	/**
	 * @return the result of calling function T() with the specified argument
	 */
	private static Eval invokeT(Eval arg) {
		Eval[] args = { arg, };
		Eval result = new T().evaluate(args, -1, (short)-1);
		assertNotNull("result may never be null", result);
		return result;
	}
	/**
	 * Simulates call: T(A1)
	 * where cell A1 has the specified innerValue
	 */
	private Eval invokeTWithReference(ValueEval innerValue) {
		Eval arg = EvalFactory.createRefEval("$B$2", innerValue);
		return invokeT(arg);
	}
	
	private static void confirmText(String text) {
		Eval arg = new StringEval(text);
		Eval eval = invokeT(arg);
		StringEval se = (StringEval) eval;
		assertEquals(text, se.getStringValue());
	}
	
	public void testTextValues() {
		
		confirmText("abc");
		confirmText("");
		confirmText(" ");
		confirmText("~");
		confirmText("123");
		confirmText("TRUE");
	}
	
	private static void confirmError(Eval arg) {
		Eval eval = invokeT(arg);
		assertTrue(arg == eval);
	}

	public void testErrorValues() {
		
		confirmError(ErrorEval.VALUE_INVALID);
		confirmError(ErrorEval.NA);
		confirmError(ErrorEval.REF_INVALID);
	}
	
	private static void confirmString(Eval eval, String expected) {
		assertTrue(eval instanceof StringEval);
		assertEquals(expected, ((StringEval)eval).getStringValue());
	}

	private static void confirmOther(Eval arg) {
		Eval eval = invokeT(arg);
		confirmString(eval, "");
	}

	public void testOtherValues() {
		confirmOther(new NumberEval(2));
		confirmOther(BoolEval.FALSE);
		confirmOther(BlankEval.INSTANCE);  // can this particular case be verified?
	}

	public void testRefValues() {
		Eval eval;
		
		eval = invokeTWithReference(new StringEval("def"));
		confirmString(eval, "def");
		eval = invokeTWithReference(new StringEval(" "));
		confirmString(eval, " ");

		eval = invokeTWithReference(new NumberEval(2));
		confirmString(eval, "");
		eval = invokeTWithReference(BoolEval.TRUE);
		confirmString(eval, "");
		
		eval = invokeTWithReference(ErrorEval.NAME_INVALID);
		assertTrue(eval == ErrorEval.NAME_INVALID);
	}
}