public void WaitsForASpecifiedPeriod()
{
// arrange
const int maximumRetryAttempts = 4;
var path = FilePath;
var waitTime = TimeSpan.FromMilliseconds(250);
var lapTimes = new List <DateTime>();
// act
using (File.CreateText(path))
{
FileLockExtensions.WaitAndRetryOnFileLock(() =>
{
lapTimes.Add(DateTime.Now);
File.OpenText(path);
}, waitTime, maximumRetryAttempts);
}
// assert
for (var i = 0; (i + 1) < maximumRetryAttempts; i++)
{
var nextTimeIndex = i + 1;
var timeElapsed = lapTimes[nextTimeIndex].Subtract(lapTimes[i]);
Assert.InRange(timeElapsed, waitTime, waitTime.Add(TimeSpan.FromSeconds(1)));
}
}
public void CallsActionWhenSharingViolationOccurs()
{
// arrange
var path = FilePath;
var whenSharingViolationOccursCalled = false;
// act
using (File.CreateText(path))
{
FileLockExtensions.WaitAndRetryOnFileLock(() => File.OpenText(path),
maximumRetryAttempts: 0,
whenSharingViolationOccurs: (retryAttemptsRemaining) => whenSharingViolationOccursCalled = true
);
}
// assert
Assert.True(whenSharingViolationOccursCalled);
}
public void RetriesASpecifiedNumberOfTimes(int maxRetryAttempts, int callCountExpected)
{
// arrange
var path = FilePath;
var callCount = 0;
// act
using (File.CreateText(path))
{
FileLockExtensions.WaitAndRetryOnFileLock(() =>
{
callCount++;
File.OpenText(path);
}, TimeSpan.FromTicks(1), maxRetryAttempts);
}
// assert
Assert.Equal(callCountExpected, callCount);
}
