public void InitialBackoffTicks_FirstCall_ReturnsConfiguredValue()
{
var policy = new ExponentialBackoffPolicy(
new TestRandomGenerator(),
initialBackoffTicks: 10,
maxBackoffTicks: 2000);
Assert.AreEqual(TimeSpan.FromTicks(10), policy.NextBackoff());
Assert.AreEqual(TimeSpan.FromTicks(16), policy.NextBackoff());
}
public void MaxBackoffTicks_MultipleCalls_ReachesLimit()
{
var policy = new ExponentialBackoffPolicy(
new TestRandomGenerator(),
initialBackoffTicks: 10,
maxBackoffTicks: 2000);
for (var i = 0; i < 50; i++)
{
if (policy.NextBackoff() == TimeSpan.FromTicks(2000))
{
break;
}
}
Assert.AreEqual(TimeSpan.FromTicks(2000), policy.NextBackoff());
}
public void MaxBackoffTicks_Int32MaxValueWithJitter_ReturnsUpToInt32PlusMaxJitter()
{
const long MaximumWithJitter = (long)(int.MaxValue + int.MaxValue * ExponentialBackoffPolicy.Jitter);
var policy = new ExponentialBackoffPolicy(
new TestRandomGenerator()
{
DoubleResult = 1
},
initialBackoffTicks: 1,
maxBackoffTicks: int.MaxValue);
for (var i = 0; i < 1000; i++)
{
var backoff = policy.NextBackoff();
Assert.Greater(backoff.Ticks, 0);
Assert.LessOrEqual(backoff.Ticks, MaximumWithJitter);
}
Assert.AreEqual(policy.NextBackoff(), TimeSpan.FromTicks(MaximumWithJitter));
}