using NUnit.Framework;

namespace Recognizer
{
    [TestFixture]
    public class ThresholdFilterTest
    {
        private void Test(double[,] image, double[,] handledImageReq, double whitePixelFraction)
        {
            var resultHandle = ThresholdFilterTask.ThresholdFilter(image, whitePixelFraction);
            Assert.AreEqual(handledImageReq.GetLength(0), resultHandle.GetLength(0));
            Assert.AreEqual(handledImageReq.GetLength(1), resultHandle.GetLength(1));
            for (var i = 0; i < handledImageReq.GetLength(0); i++)
            for (var j = 0; j < handledImageReq.GetLength(1); j++)
                Assert.AreEqual(handledImageReq[i, j], resultHandle[i, j]);
        }

        [Test]
        public void oneOnOne()
        {
            var whitePixelFraction = 1;
            var image = new double[,]
            {
                {123}
            };
            var needImage = new double[,]
            {
                {1}
            };
            Test(image, needImage, whitePixelFraction);
        }
        [Test]
        public void oneOnOne05()
        {
            var whitePixelFraction = 0.5;
            var image = new double[,]
            {
                {123}
            };
            var needImage = new double[,]
            {
                {0}
            };
            Test(image, needImage, whitePixelFraction);
        }

        [Test]
        public void oneOnTwo05()
        {
            var whitePixelFraction = 0.5;
            var image = new double[,]
            {
                {1, 0}
            };
            var needImage = new double[,]
            {
                {1, 0}
            };
            Test(image, needImage, whitePixelFraction);
        }
    }
}