public void AddModel_HappyPath()
{
var makeName = "make3";
var make = _makeManager.AddMake(makeName);
Assert.Equal(makeName, make.Name);
var modelName = "model3";
var model = _modelManager.AddModel(make.Id, modelName);
Assert.Equal(modelName, model.Name);
var models = _modelManager.GetModelsByMakeId(make.Id);
Assert.Contains(models, x => x.Name == modelName);
}
