feat: добавил новые юнит-тесты для сервисов и маппинга

backend/UniVerse.Api.Tests/Domain/EnrollmentSlotPolicyTests.cs

@@ -0,0 +1,29 @@
+using UniVerse.Domain.Services;
+using Xunit;
+
+namespace UniVerse.Api.Tests.DomainServices;
+
+public class EnrollmentSlotPolicyTests
+{
+    [Theory]
+    [InlineData(-1, 3)]
+    [InlineData(0, 3)]
+    [InlineData(1, 3)]
+    [InlineData(2, 3)]
+    [InlineData(3, 5)]
+    [InlineData(4, 7)]
+    [InlineData(10, 7)]
+    public void GetLimitForLevel_UsesHighestMatchingRuleOrDefault(int level, int expectedSlots)
+    {
+        var slots = EnrollmentSlotPolicy.GetLimitForLevel(level);
+
+        Assert.Equal(expectedSlots, slots);
+    }
+
+    [Fact]
+    public void Rules_ExposeConfiguredThresholdsInAscendingOrder()
+    {
+        Assert.Equal(new[] { 1, 3, 4 }, EnrollmentSlotPolicy.Rules.Select(rule => rule.Level));
+        Assert.Equal(new[] { 3, 5, 7 }, EnrollmentSlotPolicy.Rules.Select(rule => rule.Slots));
+    }
+}