public void TestFixedTargetAndRateBehaveCorrectly()
{
var strategy = new LocalizedSamplingStrategy();
strategy.Rules.Add(new SamplingRule("name", "test", "get", 10, 0.05));
int count = 0;
// fill the fixed target rate
Action action = () =>
{
if (strategy.Sample("name", "test", "get") == SampleDecision.Sampled)
{
Interlocked.Increment(ref count);
}
};
var actions = Enumerable.Repeat(action, 10).ToArray();
Parallel.Invoke(actions);
Assert.AreEqual(10, count);
count = 0;
for (int i = 0; i < 200; i++)
{
count += strategy.Sample("name", "test", "get") == SampleDecision.Sampled ? 1 : 0;
}
// Default sample rate is 5%. The chance that count == 0 after 200 tries is 0.003%.
Assert.IsTrue(count > 0);
Assert.IsTrue(count < 50);
}
public void TestDefaultRuleWithRequest()
{
var request = new HttpRequestMessage
{
RequestUri = new Uri(@"http://www.amazon.com/api/product"),
Method = HttpMethod.Post
};
request.Headers.Add("Host", "www.amazon.com");
var strategy = new LocalizedSamplingStrategy();
Assert.AreEqual(SampleDecision.Sampled, strategy.Sample(request));
}