public async Task ReturnsExpectedCount()
{
// Arrange
var mockService = new Mock <IMessageDbService>();
mockService.Setup(service => service.GetAllAsync())
.ReturnsAsync(TestHelper.GetMessages());
var controller = new MessagesController(mockService.Object);
var result = await controller.GetAllAsync();
Assert.That(result.Value.Count(), Is.EqualTo(2));
}