private static bool CheckWhereSelectComposition(int dataSize)
{
TestHarness.TestLog("CheckWhereSelectComposition: {0}", dataSize);
int[] data = new int[dataSize];
for (int i = 0; i < dataSize; i++)
{
data[i] = i;
}
WhereQueryOperator <int> whereOp = new WhereQueryOperator <int>(
data, delegate(int x) { return((x % 2) == 0); }); // select only even elements
SelectQueryOperator <int, int> selectOp = new SelectQueryOperator <int, int>(
whereOp, delegate(int x) { return(x * 2); }); // just double the elements
bool passed = true;
// Verify composition of the tree:
// SELECT <-- WHERE <-- SCAN <-- {data}
SelectQueryOperator <int, int> sel = selectOp as SelectQueryOperator <int, int>;
passed &= sel != null;
TestHarness.TestLog(" > {0}: SELECT is non-null", passed);
WhereQueryOperator <int> where = sel.Child as WhereQueryOperator <int>;
passed &= where != null;
TestHarness.TestLog(" > {0}: WHERE is non-null", passed);
ScanQueryOperator <int> scan = where.Child as ScanQueryOperator <int>;
passed &= scan != null;
TestHarness.TestLog(" > {0}: SCAN is non-null", passed);
// Now verify the output is what we expect.
int expectSum = 0;
for (int i = 0; i < dataSize; i++)
{
if ((i % 2) == 0)
{
expectSum += (i * 2);
}
}
int realSum = 0;
IEnumerator <int> e = selectOp.GetEnumerator();
while (e.MoveNext())
{
realSum += e.Current;
}
passed = (realSum == expectSum);
TestHarness.TestLog(" > {0}: actual sum {1} == expected sum {2}?", passed, realSum, expectSum);
return(passed);
}
private static bool CheckWhereSelectComposition(int dataSize)
{
TestHarness.TestLog("CheckWhereSelectComposition: {0}", dataSize);
int[] data = new int[dataSize];
for (int i = 0; i < dataSize; i++) data[i] = i;
WhereQueryOperator<int> whereOp = new WhereQueryOperator<int>(
data, delegate(int x) { return (x % 2) == 0; }); // select only even elements
SelectQueryOperator<int, int> selectOp = new SelectQueryOperator<int, int>(
whereOp, delegate(int x) { return x * 2; }); // just double the elements
bool passed = true;
// Verify composition of the tree:
// SELECT <-- WHERE <-- SCAN <-- {data}
SelectQueryOperator<int, int> sel = selectOp as SelectQueryOperator<int, int>;
passed &= sel != null;
TestHarness.TestLog(" > {0}: SELECT is non-null", passed);
WhereQueryOperator<int> where = sel.Child as WhereQueryOperator<int>;
passed &= where != null;
TestHarness.TestLog(" > {0}: WHERE is non-null", passed);
ScanQueryOperator<int> scan = where.Child as ScanQueryOperator<int>;
passed &= scan != null;
TestHarness.TestLog(" > {0}: SCAN is non-null", passed);
// Now verify the output is what we expect.
int expectSum = 0;
for (int i = 0; i < dataSize; i++)
if ((i % 2) == 0)
expectSum += (i * 2);
int realSum = 0;
IEnumerator<int> e = selectOp.GetEnumerator();
while (e.MoveNext())
{
realSum += e.Current;
}
passed = (realSum == expectSum);
TestHarness.TestLog(" > {0}: actual sum {1} == expected sum {2}?", passed, realSum, expectSum);
return passed;
}
