public void GetOrAdd_ReturnsNullValues_IfFileDoesNotExistInFileProvider()
{
// Arrange
var path = @"Views\_ViewStart.cshtml";
var mockFileProvider = new Mock<TestFileProvider> { CallBase = true };
var fileProvider = mockFileProvider.Object;
var codeTreeCache = new DefaultCodeTreeCache(fileProvider);
var expected = new CodeTree();
// Act
var result1 = codeTreeCache.GetOrAdd(path, fileInfo => expected);
var result2 = codeTreeCache.GetOrAdd(path, fileInfo => { throw new Exception("Shouldn't be called."); });
// Assert
Assert.Null(result1);
Assert.Null(result2);
mockFileProvider.Verify(f => f.GetFileInfo(It.IsAny<string>()), Times.Once());
}
public void GetOrAdd_ReturnsCachedEntriesOnSubsequentCalls()
{
// Arrange
var path = @"Views\_ViewStart.cshtml";
var mockFileProvider = new Mock<TestFileProvider> { CallBase = true };
var fileProvider = mockFileProvider.Object;
fileProvider.AddFile(path, "test content");
var codeTreeCache = new DefaultCodeTreeCache(fileProvider);
var expected = new CodeTree();
// Act
var result1 = codeTreeCache.GetOrAdd(path, fileInfo => expected);
var result2 = codeTreeCache.GetOrAdd(path, fileInfo => { throw new Exception("Shouldn't be called."); });
// Assert
Assert.Same(expected, result1);
Assert.Same(expected, result2);
mockFileProvider.Verify(f => f.GetFileInfo(It.IsAny<string>()), Times.Once());
}
public void GetOrAdd_UpdatesCache_IfFileExpirationTriggerExpires()
{
// Arrange
var path = @"Views\Home\_ViewStart.cshtml";
var fileProvider = new TestFileProvider();
fileProvider.AddFile(path, "test content");
var codeTreeCache = new DefaultCodeTreeCache(fileProvider);
var expected1 = new CodeTree();
var expected2 = new CodeTree();
// Act 1
var result1 = codeTreeCache.GetOrAdd(path, fileInfo => expected1);
// Assert 1
Assert.Same(expected1, result1);
// Act 2
fileProvider.GetTrigger(path).IsExpired = true;
var result2 = codeTreeCache.GetOrAdd(path, fileInfo => expected2);
// Assert 2
Assert.Same(expected2, result2);
}
public void GetOrAdd_UpdatesCacheWithNullValue_IfFileWasDeleted()
{
// Arrange
var path = @"Views\Home\_ViewStart.cshtml";
var fileProvider = new TestFileProvider();
fileProvider.AddFile(path, "test content");
var codeTreeCache = new DefaultCodeTreeCache(fileProvider);
var expected1 = new CodeTree();
// Act 1
var result1 = codeTreeCache.GetOrAdd(path, fileInfo => expected1);
// Assert 1
Assert.Same(expected1, result1);
// Act 2
fileProvider.DeleteFile(path);
fileProvider.GetTrigger(path).IsExpired = true;
var result2 = codeTreeCache.GetOrAdd(path, fileInfo => { throw new Exception("Shouldn't be called."); });
// Assert 2
Assert.Null(result2);
}
public void GetOrAdd_ExpiresEntriesAfterOneMinute()
{
// Arrange
var path = @"Views\Home\_ViewStart.cshtml";
var fileProvider = new TestFileProvider();
fileProvider.AddFile(path, "some content");
var clock = new Mock<ISystemClock>();
var utcNow = DateTimeOffset.UtcNow;
clock.SetupGet(c => c.UtcNow)
.Returns(() => utcNow);
var options = new MemoryCacheOptions { Clock = clock.Object };
var codeTreeCache = new DefaultCodeTreeCache(fileProvider, options);
var codeTree1 = new CodeTree();
var codeTree2 = new CodeTree();
// Act 1
var result1 = codeTreeCache.GetOrAdd(path, fileInfo => codeTree1);
// Assert 1
Assert.Same(codeTree1, result1);
// Act 2
utcNow = utcNow.AddSeconds(59);
var result2 = codeTreeCache.GetOrAdd(path, fileInfo => { throw new Exception("Shouldn't be called."); });
// Assert 2
Assert.Same(codeTree1, result2);
// Act 3
utcNow = utcNow.AddSeconds(65);
var result3 = codeTreeCache.GetOrAdd(path, fileInfo => codeTree2);
// Assert 3
Assert.Same(codeTree2, result3);
}