public void CallTopicsGetByIdOnce(int id)
{
// Arrange
var topicServiceMock = new Mock <ITopicsService>();
var usersServiceMock = new Mock <IUsersService>();
var submissionsServiceMock = new Mock <ITopicSubmissionsService>();
var topicController = new TopicsController(
topicServiceMock.Object,
usersServiceMock.Object,
submissionsServiceMock.Object);
// Act
topicController.Details(id);
// Assert
topicServiceMock.Verify(t => t.GetById(id), Times.Once);
}
