public void Test_GetPreviousFileAsync_NoPrevious()
{
// the blobClient in the real storage provider should return null if the blob.Exists() function is false
IStorageProvider mockStorageProvider = new MockStorageProviderReadBlobDoesNotExist();
var changeNumber = "3"; // needs to be valid
var result = AzureIpFileFunctions.GetPreviousFileAsync(mockStorageProvider, "demo", changeNumber).Result;
// no previous expect null
Assert.Null(result);
}
public void Test_GetPreviousFileAsync_Previous_TooOld()
{
// the function should look for a file named previous change number, even if there's a gap, so here "1"
var file = new ServiceTagFile()
{
ChangeNumber = "1"
};
var fileAsStream = AzureIpFileFunctions.StringToStream(AzureIpFileFunctions.SerializeFile(file));
IStorageProvider mockStorageProvider = new MockStorageProviderReadBlobDoesExist(fileAsStream, "1");
var changeNumber = "4"; // needs to be valid
// expect file "1" - but implementation only goes back 2, so null
var result = AzureIpFileFunctions.GetPreviousFileAsync(mockStorageProvider, "demo", changeNumber).Result;
// found nothing
Assert.Null(result);
}
public void Test_GetPreviousFileAsync_Previous_NonContiguous()
{
// the function should look for a file named previous change number, even if there's a gap, so here "1"
var file = new ServiceTagFile()
{
ChangeNumber = "2"
};
var fileAsStream = AzureIpFileFunctions.StringToStream(AzureIpFileFunctions.SerializeFile(file));
IStorageProvider mockStorageProvider = new MockStorageProviderReadBlobDoesExist(fileAsStream, "2");
var changeNumber = "4"; // needs to be valid
// expect file "2"
var result = AzureIpFileFunctions.GetPreviousFileAsync(mockStorageProvider, "demo", changeNumber).Result;
// found previous
Assert.Equal(result.ChangeNumber, file.ChangeNumber);
}