added followersListState tests

src/BirdsiteLive.sln

@@ -47,7 +47,9 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "BirdsiteLive.Moderation.Tes
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "BirdsiteLive.Common.Tests", "Tests\BirdsiteLive.Common.Tests\BirdsiteLive.Common.Tests.csproj", "{C69F7582-6050-44DC-BAAB-7C8F0BDA525C}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "BSLManager", "BSLManager\BSLManager.csproj", "{4A84D351-E91B-4E58-8E20-211F0F4991D7}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "BSLManager", "BSLManager\BSLManager.csproj", "{4A84D351-E91B-4E58-8E20-211F0F4991D7}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "BSLManager.Tests", "Tests\BSLManager.Tests\BSLManager.Tests.csproj", "{D4457271-620E-465A-B08E-7FC63C99A2F6}"
 EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
@@ -131,6 +133,10 @@ Global
 		{4A84D351-E91B-4E58-8E20-211F0F4991D7}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{4A84D351-E91B-4E58-8E20-211F0F4991D7}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{4A84D351-E91B-4E58-8E20-211F0F4991D7}.Release|Any CPU.Build.0 = Release|Any CPU
+		{D4457271-620E-465A-B08E-7FC63C99A2F6}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{D4457271-620E-465A-B08E-7FC63C99A2F6}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{D4457271-620E-465A-B08E-7FC63C99A2F6}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{D4457271-620E-465A-B08E-7FC63C99A2F6}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
@@ -153,6 +159,7 @@ Global
 		{4BE541AC-8A93-4FA3-98AC-956CC2D5B748} = {DA3C160C-4811-4E26-A5AD-42B81FAF2D7C}
 		{0A311BF3-4FD9-4303-940A-A3778890561C} = {A32D3458-09D0-4E0A-BA4B-8C411B816B94}
 		{C69F7582-6050-44DC-BAAB-7C8F0BDA525C} = {A32D3458-09D0-4E0A-BA4B-8C411B816B94}
+		{D4457271-620E-465A-B08E-7FC63C99A2F6} = {A32D3458-09D0-4E0A-BA4B-8C411B816B94}
 	EndGlobalSection
 	GlobalSection(ExtensibilityGlobals) = postSolution
 		SolutionGuid = {69E8DCAD-4C37-4010-858F-5F94E6FBABCE}

src/Tests/BSLManager.Tests/BSLManager.Tests.csproj

@@ -0,0 +1,20 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>netcoreapp3.1</TargetFramework>
+
+    <IsPackable>false</IsPackable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.7.1" />
+    <PackageReference Include="MSTest.TestAdapter" Version="2.1.1" />
+    <PackageReference Include="MSTest.TestFramework" Version="2.1.1" />
+    <PackageReference Include="coverlet.collector" Version="1.3.0" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\..\BSLManager\BSLManager.csproj" />
+  </ItemGroup>
+
+</Project>

src/Tests/BSLManager.Tests/Domain/FollowersListStateTests.cs

@@ -0,0 +1,307 @@
+using System.Collections.Generic;
+using System.Linq;
+using BirdsiteLive.DAL.Models;
+using BSLManager.Domain;
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+
+namespace BSLManager.Tests
+{
+    [TestClass]
+    public class FollowersListStateTests
+    {
+        [TestMethod]
+        public void FilterBy()
+        {
+            #region Stub
+            var followers = new List<Follower>
+            {
+                new Follower
+                {
+                    Id = 0,
+                    Acct = "test",
+                    Host = "host1",
+                    Followings = new List<int>()
+                }, 
+                new Follower
+                {
+                    Id = 1,
+                    Acct = "test",
+                    Host = "host2",
+                    Followings = new List<int>()
+                },
+                new Follower
+                {
+                    Id = 2,
+                    Acct = "user1",
+                    Host = "host1",
+                    Followings = new List<int>()
+                },
+                new Follower
+                {
+                    Id = 3,
+                    Acct = "user2",
+                    Host = "host1",
+                    Followings = new List<int>()
+                }
+            };
+            #endregion
+
+            var state = new FollowersListState();
+            state.Load(followers);
+
+            state.FilterBy("test");
+            
+            #region Validate
+            Assert.AreEqual(2, state.GetDisplayableList().Count);
+            #endregion
+        }
+
+        [TestMethod]
+        public void FilterBy_GetElement()
+        {
+            #region Stub
+            var followers = new List<Follower>
+            {
+                new Follower
+                {
+                    Id = 0,
+                    Acct = "test",
+                    Host = "host1",
+                    Followings = new List<int>()
+                },
+                new Follower
+                {
+                    Id = 1,
+                    Acct = "test",
+                    Host = "host2",
+                    Followings = new List<int>()
+                },
+                new Follower
+                {
+                    Id = 2,
+                    Acct = "user1",
+                    Host = "host1",
+                    Followings = new List<int>()
+                },
+                new Follower
+                {
+                    Id = 3,
+                    Acct = "user2",
+                    Host = "host1",
+                    Followings = new List<int>()
+                }
+            };
+            #endregion
+
+            var state = new FollowersListState();
+            state.Load(followers);
+
+            state.FilterBy("test");
+            var el = state.GetElementAt(1);
+
+            #region Validate
+            Assert.AreEqual(followers[1].Id, el.Id);
+            #endregion
+        }
+
+        [TestMethod]
+        public void GetElement()
+        {
+            #region Stub
+            var followers = new List<Follower>
+            {
+                new Follower
+                {
+                    Id = 0,
+                    Acct = "test",
+                    Host = "host1",
+                    Followings = new List<int>()
+                },
+                new Follower
+                {
+                    Id = 1,
+                    Acct = "test",
+                    Host = "host2",
+                    Followings = new List<int>()
+                },
+                new Follower
+                {
+                    Id = 2,
+                    Acct = "user1",
+                    Host = "host1",
+                    Followings = new List<int>()
+                },
+                new Follower
+                {
+                    Id = 3,
+                    Acct = "user2",
+                    Host = "host1",
+                    Followings = new List<int>()
+                }
+            };
+            #endregion
+
+            var state = new FollowersListState();
+            state.Load(followers);
+
+            var el = state.GetElementAt(2);
+
+            #region Validate
+            Assert.AreEqual(followers[2].Id, el.Id);
+            #endregion
+        }
+
+        [TestMethod]
+        public void FilterBy_RemoveAt()
+        {
+            #region Stub
+            var followers = new List<Follower>
+            {
+                new Follower
+                {
+                    Id = 0,
+                    Acct = "test",
+                    Host = "host1",
+                    Followings = new List<int>()
+                },
+                new Follower
+                {
+                    Id = 1,
+                    Acct = "test",
+                    Host = "host2",
+                    Followings = new List<int>()
+                },
+                new Follower
+                {
+                    Id = 2,
+                    Acct = "user1",
+                    Host = "host1",
+                    Followings = new List<int>()
+                },
+                new Follower
+                {
+                    Id = 3,
+                    Acct = "user2",
+                    Host = "host1",
+                    Followings = new List<int>()
+                }
+            };
+            #endregion
+
+            var state = new FollowersListState();
+            state.Load(followers.ToList());
+
+            state.FilterBy("test");
+            state.RemoveAt(1);
+
+            var list = state.GetDisplayableList();
+
+            #region Validate
+            Assert.AreEqual(1, list.Count);
+            Assert.IsTrue(list[0].Contains("@test@host1"));
+            #endregion
+        }
+
+        [TestMethod]
+        public void RemoveAt()
+        {
+            #region Stub
+            var followers = new List<Follower>
+            {
+                new Follower
+                {
+                    Id = 0,
+                    Acct = "test",
+                    Host = "host1",
+                    Followings = new List<int>()
+                },
+                new Follower
+                {
+                    Id = 1,
+                    Acct = "test",
+                    Host = "host2",
+                    Followings = new List<int>()
+                },
+                new Follower
+                {
+                    Id = 2,
+                    Acct = "user1",
+                    Host = "host1",
+                    Followings = new List<int>()
+                },
+                new Follower
+                {
+                    Id = 3,
+                    Acct = "user2",
+                    Host = "host1",
+                    Followings = new List<int>()
+                }
+            };
+            #endregion
+
+            var state = new FollowersListState();
+            state.Load(followers.ToList());
+
+            state.RemoveAt(1);
+
+            var list = state.GetDisplayableList();
+
+            #region Validate
+            Assert.AreEqual(3, list.Count);
+            Assert.IsTrue(list[0].Contains("@test@host1"));
+            Assert.IsFalse(list[1].Contains("@test@host2"));
+            #endregion
+        }
+
+        [TestMethod]
+        public void FilterBy_ResetFilter()
+        {
+            #region Stub
+            var followers = new List<Follower>
+            {
+                new Follower
+                {
+                    Id = 0,
+                    Acct = "test",
+                    Host = "host1",
+                    Followings = new List<int>()
+                },
+                new Follower
+                {
+                    Id = 1,
+                    Acct = "test",
+                    Host = "host2",
+                    Followings = new List<int>()
+                },
+                new Follower
+                {
+                    Id = 2,
+                    Acct = "user1",
+                    Host = "host1",
+                    Followings = new List<int>()
+                },
+                new Follower
+                {
+                    Id = 3,
+                    Acct = "user2",
+                    Host = "host1",
+                    Followings = new List<int>()
+                }
+            };
+            #endregion
+
+            var state = new FollowersListState();
+            state.Load(followers.ToList());
+            
+            #region Validate
+            state.FilterBy("data");
+            var list = state.GetDisplayableList();
+            Assert.AreEqual(0, list.Count);
+
+            state.FilterBy(string.Empty);
+            list = state.GetDisplayableList();
+            Assert.AreEqual(4, list.Count);
+            #endregion
+        }
+    }
+}