package franck.eecs1030;

import java.util.Random;

public class ConverterTest
{
    public static void main(String[] args)
    {
	Random random = new Random(System.currentTimeMillis());

	final int RANDOM = 10;
	final double EPSILON = 0.0001;

	for (int from = Converter.CENTIMETER; from <= Converter.FOOT; from++)
	{
	    for (int to = Converter.CENTIMETER; to <= Converter.FOOT; to++)
	    {
		for (int r = 0; r < RANDOM; r++)
		{
		    try
		    {
			double amount = Math.abs(random.nextDouble());
			double converted = Converter.convert(amount, from, to);
			double doubleConverted = Converter.convert(converted, to, from);
			if (Math.abs(amount - doubleConverted) > EPSILON * amount)
			{
			    System.out.printf("Test failed for amount = %f,  from = %d, to = %d%n", amount, from, to);
			}
		    }
		    catch (IllegalArgumentException e) {}
		}
		
		try
		{
		    double amount = 0;
		    double converted = Converter.convert(amount, from, to);
		    double doubleConverted = Converter.convert(converted, to, from);
		    if (Math.abs(amount - doubleConverted) > EPSILON * amount)
		    {
			System.out.printf("Test failed for amount = %f,  from = %d, to = %d%n", amount, from, to);
		    }
		}
		catch (IllegalArgumentException e) {}
		
		try
		{
		    double amount = Double.MAX_VALUE;
		    double converted = Converter.convert(amount, from, to);
		    double doubleConverted = Converter.convert(converted, to, from);
		    if (Math.abs(amount - doubleConverted) > EPSILON * amount)
		    {
			System.out.printf("Test failed for amount = %f,  from = %d, to = %d%n", amount, from, to);
		    }
		}
		catch (IllegalArgumentException e) {}
	    }
	}
    }
}