public void GetImageAsByteArray_NoParamsAndImageCacheHasNoData_ReturnsNull()
{
// Arrange
var imageCache = new CacheUpdateService();
// Act
var imgCacheSvc = new ImageFromCacheService(imageCache);
// Assert
Assert.IsNull(imgCacheSvc.GetCurrentImageAsByteArray());
}
public void Constructor_ValidParams_HappyPath(int expiration, int fps)
{
// Arrange
var imageCache = new CacheUpdateService();
// Act
var imgCacheSvc = new ImageFromCacheService(imageCache, null, expiration, fps);
// Assert
Assert.IsNotNull(imgCacheSvc);
}
public void GetImageAsByteArray_NoParamsImageCacheHasData_ReturnsNotNull()
{
// Arrange
var imageCache = new CacheUpdateService();
imageCache.UpdateImage(new byte[2], 1, DateTime.MaxValue);
// Act
var imgCacheSvc = new ImageFromCacheService(imageCache);
// Assert
Assert.IsNotNull(imgCacheSvc.GetCurrentImageAsByteArray());
}
[TestCase(1, StrCacheLastUpdate, 2000, 5, true, 99, 5000, false)] // Failure: readerDelay > lifetime
public void GetNewImageAsByteArray_WithParamsAndFreshData_ReturnNotNull(int cacheUpdaterUserId, string strCacheLastUpdate, int cacheLifeTime,
int cacheFps, bool cacheHasData,
int cacheReaderUserId, int cacheReaderDelay, bool expectedSuccess)
{
// Arrange
DateTime cacheLastUpdate = DateTime.ParseExact(s: strCacheLastUpdate, format: "yyyy-MM-dd HH:mm:ss.fff", provider: null);
DateTime timeWhenCacheIsRead = cacheLastUpdate.AddMilliseconds(cacheReaderDelay);
byte[] imageBytes = cacheHasData ? new byte[2] : null;
CacheUpdateService imageCache = CreateImageCache(imageBytes, cacheUpdaterUserId, cacheLastUpdate);
var cachingService = new ImageFromCacheService(cacheUpdateService: imageCache, logger: null, cacheLifeTimeMilliSec: cacheLifeTime, framesPerSecond: cacheFps);
// Act
byte[] imgBytes = cachingService.GetNewImageAsByteArray(userId: cacheReaderUserId, timeRequested: timeWhenCacheIsRead);
bool resultIsNotNull = imgBytes != null;
// Assert
Assert.AreEqual(resultIsNotNull, expectedSuccess);
}
[TestCase(10, StrCacheLastUpdate, 2000, 5, true, 99, -1, 0)] // No wait time: cacheReaderDelay < 0 ms
public void WaitBeforeGettingNextImageTest_AnyParameters_ReturnExpectedResult(int cacheUpdaterUserId, string strCacheLastUpdate, int cacheLifeTime,
int cacheFps, bool cacheHasData,
int cacheReaderUserId, int cacheReaderDelay, int expectedWaitTimeMilliSec)
{
// Arrange
DateTime cacheLastUpdate = DateTime.ParseExact(s: strCacheLastUpdate, format: "yyyy-MM-dd HH:mm:ss.fff", provider: null);
DateTime timeWhenCacheIsRead = cacheLastUpdate.AddMilliseconds(cacheReaderDelay);
byte[] imageBytes = cacheHasData ? new byte[2] : null;
CacheUpdateService imageCache = CreateImageCache(imageBytes, cacheUpdaterUserId, cacheLastUpdate);
var cachingService = new ImageFromCacheService(cacheUpdateService: imageCache, logger: null, cacheLifeTimeMilliSec: cacheLifeTime, framesPerSecond: cacheFps);
int fpsTimeBetweenTwoFramesMilliSec = 1000 / cacheFps;
// Act
(int waitTimeMilliSec, string reason) = cachingService.WaitBeforeGettingNextImage(userId: cacheReaderUserId, timeRequested: timeWhenCacheIsRead);
// Assert
Assert.That(waitTimeMilliSec, Is.EqualTo(expectedWaitTimeMilliSec));
Assert.That(waitTimeMilliSec, Is.LessThanOrEqualTo(fpsTimeBetweenTwoFramesMilliSec));
}
[TestCase(10, StrCacheLastUpdate, 2000, 5, true, 99, -1, false)] // Cannot update = new date is in the past
public void UpdateCachedImage_AnyParameters_ReturnExpectedResult(int oldUpdaterUserId, string strCacheLastUpdate, int cacheLifeTime,
int cacheFps, bool cacheHasData,
int newCacheUpdaterUserId, int newCacheUpdaterDelay, bool expectedSuccess)
{
// Arrange
DateTime cacheLastUpdate = DateTime.ParseExact(s: strCacheLastUpdate, format: "yyyy-MM-dd HH:mm:ss.fff", provider: null);
DateTime timeWhenCacheIsRead = cacheLastUpdate.AddMilliseconds(newCacheUpdaterDelay);
var oldImageArraySize = 2;
byte[] imageBytes = cacheHasData ? new byte[oldImageArraySize] : null;
CacheUpdateService imageCache = CreateImageCache(imageBytes, oldUpdaterUserId, cacheLastUpdate);
var cachingService = new ImageFromCacheService(cacheUpdateService: imageCache, logger: null, cacheLifeTimeMilliSec: cacheLifeTime, framesPerSecond: cacheFps);
var newImageArraySize = 44;
// Act
cachingService.UpdateCachedImage(new byte[newImageArraySize], newCacheUpdaterUserId, timeWhenCacheIsRead);
// Assert
bool cacheHasBeenUpdated = cachingService.GetCurrentImageAsByteArray().Length == newImageArraySize;
Assert.That(cacheHasBeenUpdated, Is.EqualTo(expectedSuccess));
}
