public void ReadRowsInSecondScanDoNotUseOriginalReaderForEmptyRowsArray()
{
// arrange
const int rows = 0;
const int columns = 0;
const double density = 0.01;
var originalVectors = SparseVectorHelper.GenerateSparseVectors(rows, columns, density, () => SparseVectorHelper.RandomInInterval(-100, 100, 2)).ToArray();
var originalReader = new InMemorySparseMatrixReader(originalVectors);
var originalReaderWithCounters = new SparseMatrixReaderWithMemberInvocationCounters <double>(originalReader);
using (var cachedReader = new CachedMatrixMarketReader <double>(originalReaderWithCounters))
{
// act
foreach (var row in cachedReader.ReadRows())
{
}
foreach (var row in cachedReader.ReadRows())
{
}
// assert
Assert.AreEqual(1, originalReaderWithCounters.ColumnsCountInvocations);
Assert.AreEqual(1, originalReaderWithCounters.RowsCountInvocations);
Assert.AreEqual(1, originalReaderWithCounters.ElementsCountInvocations);
Assert.AreEqual(1, originalReaderWithCounters.ReadRowsInvocations);
}
}
public void ReadRowsReturnSameVectorsInSecondScanForEmptyRowsArray()
{
// arrange
const int rows = 0;
const int columns = 0;
const double density = 0.01;
var originalVectors = SparseVectorHelper.GenerateSparseVectors(rows, columns, density, () => SparseVectorHelper.RandomInInterval(-100, 100, 2)).ToArray();
var originalReader = new InMemorySparseMatrixReader(originalVectors);
using (var cachedReader = new CachedMatrixMarketReader <double>(originalReader))
{
// act
foreach (var row in cachedReader.ReadRows())
{
}
var secondScanResults = originalReader.ReadRows().ZipFull(cachedReader.ReadRows(), (originalVector, cachedVector) => originalVector == cachedVector).All(b => b);
// assert
Assert.IsTrue(secondScanResults);
}
}