public void Backoff_WithFastFirstEqualToTrue_ResultIsZero()
{
// Arrange
var minDelay = TimeSpan.FromMilliseconds(1);
var maxDelay = TimeSpan.FromMilliseconds(2);
const int retryCount = 3;
const bool fastFirst = true;
const int seed = 1;
// Act
IEnumerable <TimeSpan> result = Backoff.DecorrelatedJitter(minDelay, maxDelay, retryCount, fastFirst, seed);
// Assert
result.Should().NotBeNull();
result.Should().HaveCount(retryCount);
bool first = true;
foreach (TimeSpan timeSpan in result)
{
if (first)
{
timeSpan.Should().Be(TimeSpan.FromMilliseconds(0));
first = false;
}
else
{
timeSpan.Should().BeGreaterOrEqualTo(minDelay);
timeSpan.Should().BeLessOrEqualTo(maxDelay);
}
}
}
public void Backoff_WithRetryCountLessThanZero_ThrowsException()
{
// Arrange
var minDelay = TimeSpan.FromMilliseconds(1);
var maxDelay = TimeSpan.FromMilliseconds(2);
const int retryCount = -1;
const bool fastFirst = false;
const int seed = 1;
// Act
Action act = () => Backoff.DecorrelatedJitter(minDelay, maxDelay, retryCount, fastFirst, seed);
// Assert
act.Should().Throw <ArgumentOutOfRangeException>()
.And.ParamName.Should().Be("retryCount");
}
public void Backoff_WithRetryEqualToZero_ResultIsEmpty()
{
// Arrange
var minDelay = TimeSpan.FromMilliseconds(1);
var maxDelay = TimeSpan.FromMilliseconds(2);
const int retryCount = 0;
const bool fastFirst = false;
const int seed = 1;
// Act
IEnumerable <TimeSpan> result = Backoff.DecorrelatedJitter(minDelay, maxDelay, retryCount, fastFirst, seed);
// Assert
result.Should().NotBeNull();
result.Should().BeEmpty();
}
public void Backoff_ResultIsInRange()
{
// Arrange
var minDelay = TimeSpan.FromMilliseconds(10);
var maxDelay = TimeSpan.FromMilliseconds(100);
const int retryCount = 3;
const bool fastFirst = false;
const int seed = 100;
// Act
IEnumerable <TimeSpan> result = Backoff.DecorrelatedJitter(minDelay, maxDelay, retryCount, fastFirst, seed);
// Assert
result.Should().NotBeNull();
result.Should().HaveCount(retryCount);
foreach (TimeSpan timeSpan in result)
{
timeSpan.Should().BeGreaterOrEqualTo(minDelay);
timeSpan.Should().BeLessOrEqualTo(maxDelay);
}
}