public void TestSparseEquality()
{
Assert.IsTrue(SparseWeight8.AreEqual(SparseWeight8.Create(0, 1), SparseWeight8.Create(0, 1)));
Assert.IsFalse(SparseWeight8.AreEqual(SparseWeight8.Create(0, 1), SparseWeight8.Create(0, 1, 0.25f)));
Assert.IsFalse(SparseWeight8.AreEqual(SparseWeight8.Create(0, 1), SparseWeight8.Create(1, 0)));
// check if two "half weights" are equal to one "full weight"
//Assert.IsTrue(SparseWeight8.AreWeightsEqual(SparseWeight8.Create((3, 5), (3, 5)), SparseWeight8.Create((3, 10))));
}
public void TestSparseCreation(params float[] array1)
{
var array2 = CreateSparseCompatibleArray(array1);
var array3 = array1
.Select((val, idx) => (idx, val))
.Where(item => item.val != 0)
.Reverse()
.ToArray();
// creation mode 1
var sparse = SparseWeight8.Create(array1);
Assert.AreEqual(array2.Sum(), sparse.WeightSum);
CollectionAssert.AreEqual(array2, sparse.Expand(array2.Length));
// creation mode 2
var indexedSparse = SparseWeight8.Create(array3);
Assert.AreEqual(array2.Sum(), indexedSparse.WeightSum, 0.000001f);
CollectionAssert.AreEqual(array2, indexedSparse.Expand(array2.Length));
Assert.IsTrue(SparseWeight8.AreEqual(sparse, indexedSparse));
// sort by weights
var sByWeights = SparseWeight8.OrderedByWeight(sparse);
Assert.AreEqual(array2.Sum(), sByWeights.WeightSum);
CollectionAssert.AreEqual(array2, sByWeights.Expand(array2.Length));
CheckWeightOrdered(sByWeights);
// sort by indices
var sByIndices = SparseWeight8.OrderedByIndex(sByWeights);
Assert.AreEqual(array2.Sum(), sByIndices.WeightSum);
CollectionAssert.AreEqual(array2, sByIndices.Expand(array2.Length));
CheckIndexOrdered(sByWeights);
// equality
Assert.IsTrue(SparseWeight8.AreEqual(sByIndices, sByWeights));
Assert.AreEqual(sByIndices.GetHashCode(), sByWeights.GetHashCode());
// sum
var sum = SparseWeight8.Add(sByIndices, sByWeights);
Assert.AreEqual(array2.Sum() * 2, sum.WeightSum);
// complement normalization
if (!array2.Any(item => item < 0))
{
Assert.GreaterOrEqual(sparse.GetNormalizedWithComplement(int.MaxValue).WeightSum, 1);
}
}