public void Save_WhenNoValueIsSet_SavesEmptyStringInTheCache()
{
// Act
_viewModel.Save();
// Assert
_keyDataStore.Received()
.SetValue(_key, Arg.Is <string>(value => string.IsNullOrEmpty(value)));
}
public void Save_Always_SavesTheValueInTheCache()
{
// Arrange
var viewModel = new StringCachedPropertyDecorator(_keyDataStore, _key);
viewModel.Value = "Game of Thrones";
// Act
viewModel.Save();
// Assert
_keyDataStore.Received()
.SetValue(_key, "Game of Thrones");
}