Added tests for GrainTagService.

tests/Squidex.Domain.Apps.Entities.Tests/Tags/GrainTagServiceTests.cs

@@ -0,0 +1,75 @@
+// ==========================================================================
+//  Squidex Headless CMS
+// ==========================================================================
+//  Copyright (c) Squidex UG (haftungsbeschraenkt)
+//  All rights reserved. Licensed under the MIT license.
+// ==========================================================================
+
+using System;
+using System.Collections.Generic;
+using System.Threading.Tasks;
+using FakeItEasy;
+using Orleans;
+using Xunit;
+
+namespace Squidex.Domain.Apps.Entities.Tags
+{
+    public class GrainTagServiceTests
+    {
+        private readonly IGrainFactory grainFactory = A.Fake<IGrainFactory>();
+        private readonly ITagGrain grain = A.Fake<ITagGrain>();
+        private readonly Guid appId = Guid.NewGuid();
+        private readonly GrainTagService sut;
+
+        public GrainTagServiceTests()
+        {
+            A.CallTo(() => grainFactory.GetGrain<ITagGrain>($"{appId}_Assets", null))
+                .Returns(grain);
+
+            sut = new GrainTagService(grainFactory);
+        }
+
+        [Fact]
+        public async Task Should_call_grain_when_retrieving_tas()
+        {
+            await sut.GetTagsAsync(appId, TagGroups.Assets);
+
+            A.CallTo(() => grain.GetTagsAsync())
+                .MustHaveHappened();
+        }
+
+        [Fact]
+        public async Task Should_call_grain_when_resolving_tag_ids()
+        {
+            var tagNames = new HashSet<string>();
+
+            await sut.GetTagIdsAsync(appId, TagGroups.Assets, tagNames);
+
+            A.CallTo(() => grain.GetTagIdsAsync(tagNames))
+                .MustHaveHappened();
+        }
+
+        [Fact]
+        public async Task Should_call_grain_when_denormalizing_tags()
+        {
+            var tagIds = new HashSet<string>();
+
+            await sut.DenormalizeTagsAsync(appId, TagGroups.Assets, tagIds);
+
+            A.CallTo(() => grain.DenormalizeTagsAsync(tagIds))
+                .MustHaveHappened();
+        }
+
+        [Fact]
+        public async Task Should_call_grain_when_normalizing_tags()
+        {
+            var tagIds = new HashSet<string>();
+            var tagNames = new HashSet<string>();
+
+            await sut.NormalizeTagsAsync(appId, TagGroups.Assets, tagNames, tagIds);
+
+            A.CallTo(() => grain.NormalizeTagsAsync(tagNames, tagIds))
+                .MustHaveHappened();
+        }
+    }
+}