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Automated combinatorial testing framework on top of JUnit

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package com.github.dakusui.lisj.func.math;

import java.math.BigDecimal;
import java.util.Iterator;

import com.github.dakusui.jcunit.core.Utils;
import com.github.dakusui.jcunit.exceptions.ObjectUnderFrameworkException;
import com.github.dakusui.lisj.Context;
import com.github.dakusui.lisj.FormResult;
import com.github.dakusui.lisj.func.BaseFunc;

import static com.github.dakusui.lisj.Basic.*;

public abstract class NumericFunc extends BaseFunc {
	private static final long serialVersionUID = -4320393403606841222L;

	@Override
	protected FormResult evaluateLast(Context context,
			Object[] evaluatedParams, FormResult lastResult) {
		FormResult ret = lastResult;

		BigDecimal[] evaluatedParamsBigDecimal = new BigDecimal[evaluatedParams.length];
		int i = 0;
		for (Object cur : evaluatedParams) {
			if (cur instanceof Number) evaluatedParamsBigDecimal[i] = Utils.bigDecimal((Number) cur);
			else {
				String message = String.format("Given value %s(%s) isn't a number.", cur, cur != null ? cur.getClass() : null);
				throw new ObjectUnderFrameworkException(message, null);
			}
			i++;
		}
		ret.value(bigDecimalsEvaluateLast(context, evaluatedParamsBigDecimal));
		return ret;
	}

	abstract protected BigDecimal bigDecimalsEvaluateLast(Context context, BigDecimal[] evaluatedParams);
	
	@Override
	protected Object checkParams(Object params) {
		Iterator