Prebuilt deck purchasing and fixes

SVSim.UnitTests/Controllers/BuildDeckControllerGetPurchaseCountTests.cs

@@ -0,0 +1,61 @@
+using System.Net;
+using System.Text;
+using System.Text.Json;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.Extensions.DependencyInjection;
+using SVSim.Database;
+using SVSim.Database.Models;
+using SVSim.UnitTests.Infrastructure;
+
+namespace SVSim.UnitTests.Controllers;
+
+public class BuildDeckControllerGetPurchaseCountTests
+{
+    private static StringContent JsonBody(string json) => new(json, Encoding.UTF8, "application/json");
+
+    private static async Task SeedEnabledProduct(SVSimTestFactory f, int productId, int max)
+    {
+        using var scope = f.Services.CreateScope();
+        var db = scope.ServiceProvider.GetRequiredService<SVSimDbContext>();
+        db.BuildDeckSeries.Add(new BuildDeckSeriesEntry
+        {
+            Id = 101, OrderIndex = 22, IsEnabled = true, NameKey = "BDSSN_test", IntroKey = "BDSI_test",
+        });
+        db.BuildDeckProducts.Add(new BuildDeckProductEntry
+        {
+            Id = productId, SeriesId = 101, IsEnabled = true,
+            PurchaseNumMax = max, IntroPriceCrystal = 500,
+        });
+        await db.SaveChangesAsync();
+    }
+
+    [Test]
+    public async Task Returns_zero_current_and_max_for_unbought_product()
+    {
+        using var factory = new SVSimTestFactory();
+        long viewerId = await factory.SeedViewerAsync();
+        await SeedEnabledProduct(factory, productId: 201, max: 3);
+
+        using var client = factory.CreateAuthenticatedClient(viewerId);
+        var json = """{"viewer_id":"0","steam_id":0,"steam_session_ticket":"","product_id":201}""";
+        var response = await client.PostAsync("/build_deck/get_purchase_count", JsonBody(json));
+
+        var body = await response.Content.ReadAsStringAsync();
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.OK), body);
+
+        using var doc = JsonDocument.Parse(body);
+        Assert.That(doc.RootElement.GetProperty("purchase_num_current").GetInt32(), Is.EqualTo(0));
+        Assert.That(doc.RootElement.GetProperty("purchase_num_max").GetInt32(), Is.EqualTo(3));
+    }
+
+    [Test]
+    public async Task Returns_NotFound_for_unknown_product()
+    {
+        using var factory = new SVSimTestFactory();
+        long viewerId = await factory.SeedViewerAsync();
+        using var client = factory.CreateAuthenticatedClient(viewerId);
+        var json = """{"viewer_id":"0","steam_id":0,"steam_session_ticket":"","product_id":99999}""";
+        var response = await client.PostAsync("/build_deck/get_purchase_count", JsonBody(json));
+        Assert.That(response.StatusCode, Is.EqualTo(HttpStatusCode.NotFound));
+    }
+}