public async Task GetLabelsAsync_Given_Labels_In_DB_Exist_Should_Return_Collection_Of_Labels()
{
IEnumerable <Label> labels = new List <Label>()
{
new Label(),
new Label(),
new Label(),
new Label()
};
labelManager
.Setup(s => s.GetAllLabelsAsync())
.Returns(Task.FromResult(labels));
var retval = await _labelController.GetLabelsAsync() as OkObjectResult;
Assert.IsNotNull(retval.Value);
}