public void If_sample_rate_is_1_then_always_true()
{
RandomGenerator randomGenerator = new RandomGenerator();
for (int i = 0; i < NumberOfTestsRan; i++)
{
Assert.True(randomGenerator.ShouldSend(1));
}
}
public void If_sample_rate_is_0_5_then_have_half_true()
{
int numberOfTrues = 0;
RandomGenerator randomGenerator = new RandomGenerator();
for (int i = 0; i < NumberOfTestsRan; i++)
{
if (randomGenerator.ShouldSend(0.5))
{
numberOfTrues++;
}
}
Assert.That( Math.Round(numberOfTrues/(double)NumberOfTestsRan,1),Is.EqualTo(0.5));
}
public void If_sample_rate_is_one_tenth_of_pct_then_have_one_tenth_of_pct()
{
int numberOfTrues = 0;
RandomGenerator randomGenerator = new RandomGenerator();
const int sampleRate = 1/1000;
for (int i = 0; i < NumberOfTestsRan; i++)
{
if (randomGenerator.ShouldSend(sampleRate))
{
numberOfTrues++;
}
}
Assert.That(Math.Round(numberOfTrues / (double)NumberOfTestsRan, 1), Is.EqualTo(sampleRate));
}
public void If_sample_rate_is_one_quarter_then_have_one_quarter_true()
{
var numberOfTrues = 0;
var randomGenerator = new RandomGenerator();
const int sampleRate = 1/4;
for (var i = 0; i < NumberOfTestsToRun; i++)
{
if (randomGenerator.ShouldSend(sampleRate))
{
numberOfTrues++;
}
}
Assert.That(Math.Round(numberOfTrues / (double)NumberOfTestsToRun, 1), Is.EqualTo(sampleRate));
}
