public void testSmallInput()
{
SamplinglongPrimitiveIterator t = new SamplinglongPrimitiveIterator(
countingIterator(1), 0.9999);
Assert.True(t.MoveNext());
Assert.AreEqual(0L, t.Current);
Assert.False(t.MoveNext());
}
public void testExactSizeMatch()
{
SamplinglongPrimitiveIterator t = new SamplinglongPrimitiveIterator(
countingIterator(10), 1);
for (int i = 0; i < 10; i++)
{
Assert.True(t.MoveNext());
Assert.AreEqual(i, (int)t.Current);
}
Assert.False(t.MoveNext());
}
public void testSample()
{
double p = 0.1;
int n = 1000;
double sd = Math.Sqrt(n * p * (1.0 - p));
for (int i = 0; i < 1000; i++)
{
SamplinglongPrimitiveIterator t = new SamplinglongPrimitiveIterator(countingIterator(n), p);
int k = 0;
while (t.MoveNext())
{
long v = t.Current;
k++;
Assert.True(v >= 0L);
Assert.True(v < 1000L);
}
// Should be +/- 5 standard deviations except in about 1 out of 1.7M cases
Assert.True(k >= 100 - 5 * sd);
Assert.True(k <= 100 + 5 * sd);
}
}