Added initial test cases. Fixed circle search provider logic.

JSMR.Tests/Integration/Seed.cs

@@ -0,0 +1,45 @@
+using JSMR.Domain.Entities;
+using JSMR.Infrastructure.Data;
+using Microsoft.EntityFrameworkCore;
+
+namespace JSMR.Tests.Integration;
+
+public static class Seed
+{
+    public static async Task SeedBasicTagsAsync(AppDbContext context)
+    {
+        if (await context.Tags.AnyAsync())
+            return;
+
+        context.Tags.AddRange(
+            new() { TagId = 1, Name = "OL", Favorite = false, Blacklisted = false },
+            new() { TagId = 2, Name = "ほのぼの", Favorite = true, Blacklisted = false },
+            new() { TagId = 3, Name = "ツンデレ", Favorite = false, Blacklisted = true }
+        );
+
+        context.EnglishTags.AddRange(
+            new() { EnglishTagId = 1, TagId = 1, Name = "Office Lady" },
+            new() { EnglishTagId = 2, TagId = 2, Name = "Heartwarming" },
+            new() { EnglishTagId = 3, TagId = 3, Name = "Tsundere" }
+        );
+
+        await context.SaveChangesAsync();
+    }
+
+    public static async Task SeedCirclesWithWorksAsync(AppDbContext context)
+    {
+        var c1 = new Circle { Name = "Circle A", MakerId = "mk001", Favorite = false, Blacklisted = false, Spam = false };
+        var c2 = new Circle { Name = "Circle B", MakerId = "mk002", Favorite = true, Blacklisted = false, Spam = false };
+        context.Circles.AddRange(c1, c2);
+
+        await context.SaveChangesAsync();
+
+        context.VoiceWorks.AddRange(
+            new VoiceWork { CircleId = c1.CircleId, ProductId = "R-1", ProductName = "Work 1", Downloads = 100, SalesDate = new DateTime(2024, 1, 1), HasImage = true },
+            new VoiceWork { CircleId = c1.CircleId, ProductId = "R-10", ProductName = "Work 10", Downloads = 50, SalesDate = new DateTime(2024, 2, 1), HasImage = false },
+            new VoiceWork { CircleId = c2.CircleId, ProductId = "R-2", ProductName = "Work 2", Downloads = 200, SalesDate = new DateTime(2024, 3, 1), HasImage = true }
+        );
+
+        await context.SaveChangesAsync();
+    }
+}