public void TestMultiplePrimeChecks()
{
// expected list provided by http://www.primos.mat.br/primeiros_10000_primos.txt
var generator = new SieveOfEratosthenesPrimeNumberGenerator();
Assert.AreEqual(new[] { 7901, 7907, 7919 },
generator.generate(7900, 7920),
"Prime number results for the range of 7900<=>7920 did not match expected");
Assert.AreEqual(new[] { 7901, 7907, 7919, 7927, 7933, 7937, 7949, 7951, 7963, 7993, 8009 },
generator.generate(7900, 8010),
"Prime number results for the range of 7900<=>8010 did not match expected");
Assert.AreEqual(new[] { 7901, 7907, 7919 },
generator.generate(7900, 7920),
"Prime number results for the range of 7900<=>7920 did not match expected");
}
internal static void Execute(Action <string, object, object> output, int first, int second, string third)
{
// should use an IoC container for picking the algorithms instead of using `new`, but skipping that step for simplicity of this demo
var stopwatch = new Stopwatch();
if (third == "race")
{
// for fun, let's race algorithms:
var generator = new BasicPrimeNumberGenerator();
var generator2 = new SieveOfEratosthenesPrimeNumberGenerator();
var stopwatch2 = new Stopwatch();
stopwatch.Start();
var results = generator.generate(first, second);
stopwatch.Stop();
stopwatch2.Start();
var results2 = generator2.generate(first, second);
stopwatch2.Stop();
output("\nBasicPrimeNumberGenerator generated in {0}ms ({1} ticks)", stopwatch.ElapsedMilliseconds, stopwatch.ElapsedTicks);
output("SieveOfEratosthenesPrimeNumberGenerator generated in {0}ms ({1} ticks)", stopwatch2.ElapsedMilliseconds, stopwatch2.ElapsedTicks);
}
else
{
// pick a generator
var generator = third == "alternate" || third == "a" || third == "eratosthenes"
? (IPrimeNumberGenerator) new SieveOfEratosthenesPrimeNumberGenerator()
: new BasicPrimeNumberGenerator();
stopwatch.Start();
// start generating
var results = generator.generate(first, second);
stopwatch.Stop();
output("Results: {0}{1}", string.Join(", ", results), "");
output("\nResults generated in {0}ms ({1} ticks)", stopwatch.ElapsedMilliseconds, stopwatch.ElapsedTicks);
}
}
