public async Task Should_not_try_to_write_files_if_another_instance_is_reading()
{
//Arrange
var storagefolder = new Mock <IStorageFolder <FileStoredStory> >();
var testHelper = new AsyncReadTester();
storagefolder
.Setup(mock => mock.GetStoredItemsAsync())
.Returns(testHelper.ReadAsync());
storagefolder
.Setup(mock => mock.CreateFileForItemAsync(It.IsAny <FileStoredStory>(), It.IsAny <string>()))
.Callback(() => testHelper.SetOtherFunctionCalled());
var folderprovider = new Mock <IStorageFolderProvider>();
folderprovider
.Setup(fake => fake.GetStorageFolder <FileStoredStory>(It.IsAny <string>()))
.Returns(storagefolder.Object);
var datastore1 = new InMemoryFileBackedStoryDataStore(folderprovider.Object);
var datastore2 = new InMemoryFileBackedStoryDataStore(folderprovider.Object);
var reading = datastore1.InitializeAsync();
//Act
var writing = datastore2.AddOrUpdateAsync(new[] { new Story() });
testHelper.StopFakeReading();
await Task.WhenAll(reading, writing);
//Assert
Assert.IsFalse(testHelper.CalledWhileInProgress);
}
public async Task Should_not_load_items_if_another_initialization_is_in_progressAsync()
{
//Arrange
var storagefolder = new Mock <IStorageFolder <FileStoredStory> >();
var testHelper = new AsyncReadTester();
storagefolder
.Setup(fake => fake.GetStoredItemsAsync())
.Returns(testHelper.ReadAsync());
var folderprovider = new Mock <IStorageFolderProvider>();
folderprovider
.Setup(fake => fake.GetStorageFolder <FileStoredStory>(It.IsAny <string>()))
.Returns(storagefolder.Object);
var datastore = new InMemoryFileBackedStoryDataStore(folderprovider.Object);
var firstInit = datastore.InitializeAsync();
//Act
var secondInit = datastore.InitializeAsync();
testHelper.StopFakeReading();
await Task.WhenAll(firstInit, secondInit);
//Assert
Assert.IsFalse(testHelper.CalledWhileInProgress);
}