public void TestModAlgorithm()
{
var multiplesOfSeven = new HashSet <uint> {
0, 7, 14, 21, 28, 35, 42, 49, 56, 63, 70, 77, 84, 91, 98
};
for (uint i = 0; i <= 100; ++i)
{
Assert.AreEqual(multiplesOfSeven.Contains(i), _modChecker.IsDivisibleBySeven(i));
}
}
private void TestDivisibilityChecker(ICheckDivisibilityBySeven divisibilityChecker)
{
for (uint i = 0; i <= MaxTestValue; ++i)
{
Assert.AreEqual(_modChecker.IsDivisibleBySeven(i), divisibilityChecker.IsDivisibleBySeven(i));
}
}
private long TimeTakenInMilliseconds(ICheckDivisibilityBySeven checker)
{
Stopwatch stopWatch = new Stopwatch();
stopWatch.Start();
for (uint i = 0; i <= TestValueCount; ++i)
{
checker.IsDivisibleBySeven(i);
}
stopWatch.Stop();
return stopWatch.ElapsedMilliseconds;
}
private void PerformanceTestBitShiftAlgorithm(ICheckDivisibilityBySeven standardChecker, double acceptableFactor)
{
// Code to prime the jitter.
_bitShiftChecker.IsDivisibleBySeven(1337);
standardChecker.IsDivisibleBySeven(1337);
long bitShiftMilliseconds = TimeTakenInMilliseconds(_bitShiftChecker);
long typicalMethodMilliseconds = TimeTakenInMilliseconds(standardChecker);
var speedUpFactor = typicalMethodMilliseconds/(double) bitShiftMilliseconds;
Assert.GreaterOrEqual(speedUpFactor, acceptableFactor);
}
private long TimeTakenInMilliseconds(ICheckDivisibilityBySeven checker)
{
Stopwatch stopWatch = new Stopwatch();
stopWatch.Start();
for (uint i = 0; i <= TestValueCount; ++i)
{
checker.IsDivisibleBySeven(i);
}
stopWatch.Stop();
return(stopWatch.ElapsedMilliseconds);
}
private void PerformanceTestBitShiftAlgorithm(ICheckDivisibilityBySeven standardChecker, double acceptableFactor)
{
// Code to prime the jitter.
_bitShiftChecker.IsDivisibleBySeven(1337);
standardChecker.IsDivisibleBySeven(1337);
long bitShiftMilliseconds = TimeTakenInMilliseconds(_bitShiftChecker);
long typicalMethodMilliseconds = TimeTakenInMilliseconds(standardChecker);
var speedUpFactor = typicalMethodMilliseconds / (double)bitShiftMilliseconds;
Assert.GreaterOrEqual(speedUpFactor, acceptableFactor);
}
private void TestDivisibilityChecker(ICheckDivisibilityBySeven divisibilityChecker)
{
for (uint i = 0; i <= MaxTestValue; ++i)
Assert.AreEqual(_modChecker.IsDivisibleBySeven(i), divisibilityChecker.IsDivisibleBySeven(i));
}