public async Task WhenCalling_GetImageAsync_Should_ReturnNullIfNotFound()
{
var distributedCache = A.Fake <IDistributedCache>();
A.CallTo(() => distributedCache.GetAsync(A <string> ._, A <CancellationToken> ._))
.Returns(Task.FromResult((byte[])null));
var sut = new ImagesCache(distributedCache);
var result = await sut.GetImageAsync(new ImageCacheKey("01_04_2019_001103"));
result.Should().BeNull();
}
public async Task WhenCalling_GetImageAsync_Should_CallDistributedCacheWithCorrectImageTypeInKey(string imageType, string expectedCacheKey)
{
var distributedCache = A.Fake <IDistributedCache>();
var sut = new ImagesCache(distributedCache);
await sut.GetImageAsync(new ImageCacheKey("01_04_2019_001103", null, null, null, imageType));
A.CallTo(() => distributedCache.GetAsync(
A <string> .That.Matches(key => key == expectedCacheKey),
A <CancellationToken> ._))
.MustHaveHappenedOnceExactly();
}
public async Task WhenCalling_GetImageAsync_Should_CallDistributedCacheToRetrieveImage()
{
var distributedCache = A.Fake <IDistributedCache>();
var sut = new ImagesCache(distributedCache);
await sut.GetImageAsync(new ImageCacheKey("01_04_2019_001103"));
A.CallTo(() => distributedCache.GetAsync(
A <string> .That.Matches(key => key == "01_04_2019_001103"),
A <CancellationToken> ._))
.MustHaveHappenedOnceExactly();
}
public async Task WhenCalling_GetImageAsync_Should_CallDistributedCacheWithWatermarkHashInKey()
{
var distributedCache = A.Fake <IDistributedCache>();
var sut = new ImagesCache(distributedCache);
await sut.GetImageAsync(new ImageCacheKey("01_04_2019_001103", null, null, "Some watermark text"));
A.CallTo(() => distributedCache.GetAsync(
A <string> .That.Matches(key => key == "01_04_2019_001103|wm=NZyQwos0iWRAmdBFA9T6q+MZn9B0fgauzH3MJpNplsc="),
A <CancellationToken> ._))
.MustHaveHappenedOnceExactly();
}
public async Task WhenCalling_GetImageAsync_Should_ReturnCachedImageIfFound()
{
var distributedCache = A.Fake <IDistributedCache>();
var testGdiImage = TestHelpers.GetTestImage();
A.CallTo(() => distributedCache.GetAsync(A <string> ._, A <CancellationToken> ._))
.ReturnsLazily(callinfo =>
{
var testImage = new Image("01_04_2019_001103", testGdiImage);
var bytes = testImage.ToBytes();
return(Task.FromResult(bytes));
});
var sut = new ImagesCache(distributedCache);
var result = await sut.GetImageAsync(new ImageCacheKey("01_04_2019_001103"));
result.Name.Should().BeEquivalentTo("01_04_2019_001103");
TestHelpers.CompareImages(testGdiImage, result.ToGdiImage()).Should().BeEquivalentTo(CompareResult.Same);
}
