Implement AssigneesClient

Implement client to list and check available assignees for a repository

Octokit.Tests.Integration/AssigneesClientTests.cs

@@ -0,0 +1,50 @@
+using System.Linq;
+using System.Threading.Tasks;
+using Octokit;
+using Octokit.Tests.Integration;
+using Xunit;
+
+public class AssigneesClientTests
+{
+    readonly IGitHubClient _gitHubClient;
+    readonly Repository _repository;
+    readonly string _owner;
+
+    public AssigneesClientTests()
+    {
+        _gitHubClient = new GitHubClient("Test Runner User Agent")
+        {
+            Credentials = Helper.Credentials
+        };
+        var repoName = Helper.MakeNameWithTimestamp("public-repo");
+
+        _repository = _gitHubClient.Repository.Create(new NewRepository { Name = repoName }).Result;
+        _owner = _repository.Owner.Login;
+    }
+
+    [IntegrationTest]
+    public async Task CanCheckAssignees()
+    {
+        var isAssigned = await
+            _gitHubClient.Issue.Assignee.CheckAssignee(_owner, _repository.Name, "FakeHaacked");
+        Assert.False(isAssigned);
+        
+        // Repository owner is always an assignee
+        isAssigned = await
+            _gitHubClient.Issue.Assignee.CheckAssignee(_owner, _repository.Name, _owner);
+        Assert.True(isAssigned);
+    }
+
+    [IntegrationTest]
+    public async Task CanListAssignees()
+    {
+        // Repository owner is always an assignee
+        var assignees = await _gitHubClient.Issue.Assignee.GetForRepository(_owner, _repository.Name);
+        Assert.True(assignees.Any(u => u.Login == Helper.Credentials.Login));
+    }
+
+    public void Dispose()
+    {
+        Helper.DeleteRepo(_repository);
+    }
+}