NRules/NRules

@cloudb0x @snikolayev thanks for responding! I am using NRules in a .NET core 2.1.1 project and I believe @cloudb0x 's nuget package is built for 2.2, so I could not use it outright. However my code is pretty similar. Here are the pertinent methods from my Startup class:

        // This method gets called by the runtime. Use this method to add services to the container
        public void ConfigureServices(IServiceCollection services)
        {
            services.AddNRules(AppDomain.CurrentDomain.GetAssemblies());
            services.AddCors();
            services.AddMvc().SetCompatibilityVersion(CompatibilityVersion.Version_2_1);

            // Add S3 to the ASP.NET Core dependency injection framework.
            services.AddAWSService<Amazon.S3.IAmazonS3>();

            services.UseCcl("http://test.com");

            services.AddTransient<IRuleService, RuleService>();
            services.AddSingleton<IFakeService, FakeService>();
        }

        // This method gets called by the runtime. Use this method to configure the HTTP request pipeline
        public void Configure(IApplicationBuilder app, IHostingEnvironment env)
        {
            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
            }
            else
            {
                app.UseHsts();
            }

            app.UseNRules();
            app.UseCors(builder => builder.AllowAnyOrigin().AllowAnyMethod().AllowAnyHeader());
            app.UseHttpsRedirection();
            app.UseMvc();
        }

I actually don't need the service I'm trying to resolve in the Define method of my rule, so it definitely is not being used in the rule conditions. I did try to resolve it in Define() as a test, and it still couldn't. Anyway here is how I'm trying to resolve my FakeService:

public class ColorCellBorderGreenWhenCurrentDataMoreThanPreviousRule : Rule
    {
        public override void Define()
        {
            CellDefinition cd = null;
            AdcFact currentFact = null;
            AdcFact previousFact = null;

            IEnumerable<AdcFact> facts = null;
            IEnumerable<AdcFact> sortedFacts = null;

            When()
                .Match<CellDefinition>(() => cd, c => c.Id == 2102)
                .Query(() => facts, x => x
                    .Match<AdcFact>()
                    .Collect()
                )
                .Let(() => sortedFacts, () => facts.OrderByDescending(o => o.FlowDataEffDate))
                .Let(() => currentFact, () => sortedFacts.FirstOrDefault())
                .Let(() => previousFact, () => sortedFacts.LastOrDefault())
                .Having(() => currentFact.FlowDataVolume > previousFact.FlowDataVolume);

            Then()
                .Do(ctx => SetBorderColorToGreen(cd));
        }

        public void SetBorderColorToGreen(CellDefinition cd)
        {
            IFakeService service = null;

            Dependency()
                .Resolve(() => service);

            service.DoTheThing();
        }
    }

As you can see I have a IFakeService -> FakeService mapping setup and am calling AddNRules() in ConfigureServices(), as well as calling UseNRules() in Configure(). In SetBorderColorToGreen(), service never gets resolved to a FakeService. Am I missing something?

@snikolayev thanks for the link to the dependency test. Nothing stands out to me as being different from my implementation though w/ regards to dependency resolution. Those tests do resolve the services in Define() and then pass them to the action method, but I couldn't get resolution to work even when I tried in Define().

One thing I noticed while debugging is that the constructor for my dependency resolver does get called, but a breakpoint in Resolve() never gets hit at any point during the lifetime of my application.

Thank you guys again for your help on this!