From 6bfd6fdcc1e577f7d61a64b26fd6d28292c440ea Mon Sep 17 00:00:00 2001
From: Brendan Forster <brendan@github.com>
Date: Tue, 24 Feb 2015 13:02:24 +0930
Subject: [PATCH] added ClearLabels helper function

---
 .../Clients/IssuesClientTests.cs              | 29 +++++++++++++++++++
 Octokit/Models/Request/IssueUpdate.cs         | 13 +++++++++
 2 files changed, 42 insertions(+)

diff --git a/Octokit.Tests.Integration/Clients/IssuesClientTests.cs b/Octokit.Tests.Integration/Clients/IssuesClientTests.cs
index e8903a73..363c12b7 100644
--- a/Octokit.Tests.Integration/Clients/IssuesClientTests.cs
+++ b/Octokit.Tests.Integration/Clients/IssuesClientTests.cs
@@ -322,6 +322,35 @@ public class IssuesClientTests : IDisposable
         Assert.Equal("another thing", updatedIssue.Labels[0].Name);
     }
 
+    [IntegrationTest]
+    public async Task CanClearLabelsForAnIssue()
+    {
+        var owner = _repository.Owner.Login;
+
+        // create some labels
+        await _issuesClient.Labels.Create(owner, _repository.Name, new NewLabel("something", "FF0000"));
+        await _issuesClient.Labels.Create(owner, _repository.Name, new NewLabel("another thing", "0000FF"));
+
+        // setup us the issue
+        var newIssue = new NewIssue("A test issue1")
+        {
+            Body = "A new unassigned issue",
+        };
+        newIssue.Labels.Add("something");
+        newIssue.Labels.Add("another thing");
+
+        var issue = await _issuesClient.Create(owner, _repository.Name, newIssue);
+        Assert.Equal(2, issue.Labels.Count);
+
+        // update the issue
+        var issueUpdate = issue.ToUpdate();
+        issueUpdate.ClearLabels();
+
+        var updatedIssue = await _issuesClient.Update(owner, _repository.Name, issue.Number, issueUpdate);
+
+        Assert.Empty(updatedIssue.Labels);
+    }
+
     public void Dispose()
     {
         Helper.DeleteRepo(_repository);
diff --git a/Octokit/Models/Request/IssueUpdate.cs b/Octokit/Models/Request/IssueUpdate.cs
index 1e5fe3cb..78fc964e 100644
--- a/Octokit/Models/Request/IssueUpdate.cs
+++ b/Octokit/Models/Request/IssueUpdate.cs
@@ -69,5 +69,18 @@ namespace Octokit
 
             Labels.Add(name);
         }
+
+        public void ClearLabels()
+        {
+            // lazily create the label array
+            if (Labels == null)
+            {
+                Labels = new List<string>();
+            }
+            else
+            {
+                Labels.Clear();
+            }
+        }
     }
 }