Ejemplo n.º 1
0
        public ISelection RouletteWheel()
        {
            var target = new RouletteWheelSelection();

            target.SelectChromosomes(_chromosomesNumber, _generation);
            return(target);
        }
        public void SelectChromosomes_Generation_ChromosomesZeroFitness()
        {
            var target = new RouletteWheelSelection();
            var c1     = Substitute.ForPartsOf <ChromosomeBase>(2);

            c1.Fitness = 0;

            var c2 = Substitute.ForPartsOf <ChromosomeBase>(2);

            c2.Fitness = 0;

            var c3 = Substitute.ForPartsOf <ChromosomeBase>(2);

            c3.Fitness = 0;

            var c4 = Substitute.ForPartsOf <ChromosomeBase>(2);

            c4.Fitness = 0;

            var generation = new Generation(1, new List <IChromosome>()
            {
                c1, c2, c3, c4
            });

            var actual = target.SelectChromosomes(2, generation);

            Assert.AreEqual(0, actual.Count);
        }
        public void SelectChromosomes_InvalidNumber_Exception()
        {
            var target = new RouletteWheelSelection();

            ExceptionAssert.IsThrowing(new ArgumentOutOfRangeException("number", "The number of selected chromosomes should be at least 2."), () => {
                target.SelectChromosomes(-1, null);
            });

            ExceptionAssert.IsThrowing(new ArgumentOutOfRangeException("number", "The number of selected chromosomes should be at least 2."), () => {
                target.SelectChromosomes(0, null);
            });

            ExceptionAssert.IsThrowing(new ArgumentOutOfRangeException("number", "The number of selected chromosomes should be at least 2."), () => {
                target.SelectChromosomes(1, null);
            });
        }
        public void SelectChromosomes_NullGeneration_Exception()
        {
            var target = new RouletteWheelSelection();

            ExceptionAssert.IsThrowing(new ArgumentNullException("generation"), () => {
                target.SelectChromosomes(2, null);
            });
        }
Ejemplo n.º 5
0
        public void SelectChromosomes_InvalidNumber_Exception()
        {
            var target = new RouletteWheelSelection();

            Assert.Catch <ArgumentOutOfRangeException>(() =>
            {
                target.SelectChromosomes(-1, null);
            }, "The number of selected chromosomes should be at least 2.");

            Assert.Catch <ArgumentOutOfRangeException>(() =>
            {
                target.SelectChromosomes(0, null);
            }, "The number of selected chromosomes should be at least 2.");

            Assert.Catch <ArgumentOutOfRangeException>(() =>
            {
                target.SelectChromosomes(1, null);
            }, "The number of selected chromosomes should be at least 2.");
        }
Ejemplo n.º 6
0
        public void SelectChromosomes_NullGeneration_Exception()
        {
            var target = new RouletteWheelSelection();

            var actual = Assert.Catch <ArgumentNullException>(() =>
            {
                target.SelectChromosomes(2, null);
            });

            Assert.AreEqual("generation", actual.ParamName);
        }
        public void SelectChromosomes_NullFitness_Exception()
        {
            var target     = new RouletteWheelSelection();
            var generation = new Generation(1, new List <IChromosome>
            {
                new TspChromosome(10),
                new TspChromosome(10),
                new TspChromosome(10),
                new TspChromosome(10),
                new TspChromosome(10)
            });

            var actual = Assert.Catch <SelectionException>(() =>
            {
                target.SelectChromosomes(2, generation);
            });

            Assert.AreEqual("RouletteWheelSelection: There are chromosomes with null fitness.", actual.Message);
        }
Ejemplo n.º 8
0
        public void SelectChromosomes_Generation_ChromosomesSelected()
        {
            var target = new RouletteWheelSelection();
            var c1     = Substitute.ForPartsOf <ChromosomeBase>(2);

            c1.Fitness = 0.1;

            var c2 = Substitute.ForPartsOf <ChromosomeBase>(2);

            c2.Fitness = 0.5;

            var c3 = Substitute.ForPartsOf <ChromosomeBase>(2);

            c3.Fitness = 0;

            var c4 = Substitute.ForPartsOf <ChromosomeBase>(2);

            c4.Fitness = 0.7;

            var generation = new Generation(1, new List <IChromosome>()
            {
                c1, c2, c3, c4
            });

            // Just one selected chromosome is c1.
            FlowAssert.IsAtLeastOneAttemptOk(100, () =>
            {
                var actual = target.SelectChromosomes(2, generation);
                Assert.AreEqual(2, actual.Count);
                Assert.AreEqual(1, actual.Count(c => c.Fitness == 0.1));
            });

            // All selected chromosome is c1.
            FlowAssert.IsAtLeastOneAttemptOk(1000, () =>
            {
                var actual = target.SelectChromosomes(2, generation);
                Assert.AreEqual(2, actual.Count);
                Assert.IsTrue(actual.All(c => c.Fitness == 0.1));
            });

            // Just one selected chromosome is c2.
            FlowAssert.IsAtLeastOneAttemptOk(100, () =>
            {
                var actual = target.SelectChromosomes(2, generation);
                Assert.AreEqual(2, actual.Count);
                Assert.AreEqual(1, actual.Count(c => c.Fitness == 0.5));
            });

            // All selected chromosome is c2.
            FlowAssert.IsAtLeastOneAttemptOk(1000, () =>
            {
                var actual = target.SelectChromosomes(2, generation);
                Assert.AreEqual(2, actual.Count);
                Assert.IsTrue(actual.All(c => c.Fitness == 0.5));
            });

            // None selected chromosome is c3.
            FlowAssert.IsAtLeastOneAttemptOk(100, () =>
            {
                var actual = target.SelectChromosomes(2, generation);
                Assert.AreEqual(2, actual.Count);
                Assert.AreEqual(0, actual.Count(c => c.Fitness == 0.0));
            });

            // Just one selected chromosome is c4.
            FlowAssert.IsAtLeastOneAttemptOk(100, () =>
            {
                var actual = target.SelectChromosomes(2, generation);
                Assert.AreEqual(2, actual.Count);
                Assert.AreEqual(1, actual.Count(c => c.Fitness == 0.7));
            });

            // All selected chromosome is c4.
            FlowAssert.IsAtLeastOneAttemptOk(1000, () =>
            {
                var actual = target.SelectChromosomes(2, generation);
                Assert.AreEqual(2, actual.Count);
                Assert.IsTrue(actual.All(c => c.Fitness == 0.7));
            });
        }