Add support for comparing two commits

Octokit.Reactive/Clients/IObservableRepositoriesClient.cs

@@ -221,6 +221,20 @@ public interface IObservableRepositoriesClient
         /// </remarks>
         IObservableRepoCollaboratorsClient RepoCollaborators { get; }
 
+        /// <summary>
+        /// Client for GitHub's Repository Commits API
+        /// </summary>
+        /// <remarks>
+        /// See the <a href="http://developer.github.com/v3/repos/commits/">Commits API documentation</a> for more details
+        ///</remarks>
+        IObservableRepositoryCommitsClient Commits { get; }
+
+        /// <summary>
+        /// Client for managing pull requests.
+        /// </summary>
+        /// <remarks>
+        /// See the <a href="http://developer.github.com/v3/pulls/">Pull Requests API documentation</a> for more details
+        /// </remarks>
         IObservablePullRequestsClient PullRequest { get; }
     }
 }

Octokit.Reactive/Clients/IObservableRepositoryCommitsClients.cs

@@ -0,0 +1,19 @@
+using System;
+using System.Diagnostics.CodeAnalysis;
+
+namespace Octokit.Reactive
+{
+    public interface IObservableRepositoryCommitsClient
+    {
+        /// <summary>
+        /// Compare two references in a repository
+        /// </summary>
+        /// <param name="owner">The owner of the repository</param>
+        /// <param name="name">The name of the repository</param>
+        /// <param name="base">The reference to use as the base commit</param>
+        /// <param name="head">The reference to use as the head commit</param>
+        /// <returns></returns>
+        [SuppressMessage("Microsoft.Naming", "CA1716:IdentifiersShouldNotMatchKeywords", MessageId = "base")]
+        IObservable<CompareResult> Compare(string owner, string name, string @base, string @head);
+    }
+}

Octokit.Reactive/Clients/ObservableRepositoriesClient.cs

@@ -25,6 +25,7 @@ public ObservableRepositoriesClient(IGitHubClient client)
             Statistics = new ObservableStatisticsClient(client);
             PullRequest = new ObservablePullRequestsClient(client);
             RepositoryComments = new ObservableRepositoryCommentsClient(client);
+            Commits = new ObservableRepositoryCommitsClient(client);
         }
 
         /// <summary>
@@ -328,6 +329,19 @@ public IObservable<Repository> Edit(string owner, string name, RepositoryUpdate
             return _client.Edit(owner, name, update).ToObservable();
         }
 
+        /// <summary>
+        /// Compare two references in a repository
+        /// </summary>
+        /// <param name="owner">The owner of the repository</param>
+        /// <param name="name">The name of the repository</param>
+        /// <param name="base">The reference to use as the base commit</param>
+        /// <param name="head">The reference to use as the head commit</param>
+        /// <returns></returns>
+        public IObservable<CompareResult> Compare(string owner, string name, string @base, string head)
+        {
+            return _client.Commits.Compare(owner, name, @base, head).ToObservable();
+        }
+
         /// <summary>
         /// A client for GitHub's Repo Collaborators.
         /// </summary>
@@ -336,6 +350,14 @@ public IObservable<Repository> Edit(string owner, string name, RepositoryUpdate
         /// </remarks>
         public IObservableRepoCollaboratorsClient RepoCollaborators { get; private set; }
 
+        /// <summary>
+        /// Client for GitHub's Repository Commits API
+        /// </summary>
+        /// <remarks>
+        /// See the <a href="http://developer.github.com/v3/repos/commits/">Commits API documentation</a> for more details
+        ///</remarks>
+        public IObservableRepositoryCommitsClient Commits { get; private set; }
+
         /// <summary>
         /// Client for managing pull requests.
         /// </summary>

Octokit.Reactive/Clients/ObservableRepositoryCommitsClients.cs

@@ -0,0 +1,28 @@
+using System;
+using System.Reactive.Threading.Tasks;
+
+namespace Octokit.Reactive
+{
+    public class ObservableRepositoryCommitsClient : IObservableRepositoryCommitsClient
+    {
+        readonly IGitHubClient _client;
+
+        public ObservableRepositoryCommitsClient(IGitHubClient client)
+        {
+            _client = client;
+        }
+
+        /// <summary>
+        /// Compare two references in a repository
+        /// </summary>
+        /// <param name="owner">The owner of the repository</param>
+        /// <param name="name">The name of the repository</param>
+        /// <param name="base">The reference to use as the base commit</param>
+        /// <param name="head">The reference to use as the head commit</param>
+        /// <returns></returns>
+        public IObservable<CompareResult> Compare(string owner, string name, string @base, string head)
+        {
+            return _client.Repository.Commits.Compare(owner, name, @base, head).ToObservable();
+        }
+    }
+}

Octokit.Reactive/Octokit.Reactive-Mono.csproj

@@ -141,6 +141,8 @@
     <Compile Include="Clients\ObservableIssuesLabelsClient.cs" />
     <Compile Include="Clients\IObservableRepositoryCommentsClient.cs" />
     <Compile Include="Clients\ObservableRepositoryCommentsClient.cs" />
+    <Compile Include="Clients\IObservableRepositoryCommitsClients.cs" />
+    <Compile Include="Clients\ObservableRepositoryCommitsClients.cs" />
   </ItemGroup>
   <Import Project="$(MSBuildBinPath)\Microsoft.CSharp.targets" />
   <ItemGroup>

Octokit.Reactive/Octokit.Reactive-MonoAndroid.csproj

@@ -150,6 +150,8 @@
     <Compile Include="Clients\ObservableIssuesLabelsClient.cs" />
     <Compile Include="Clients\IObservableRepositoryCommentsClient.cs" />
     <Compile Include="Clients\ObservableRepositoryCommentsClient.cs" />
+    <Compile Include="Clients\IObservableRepositoryCommitsClients.cs" />
+    <Compile Include="Clients\ObservableRepositoryCommitsClients.cs" />
   </ItemGroup>
   <Import Project="$(MSBuildExtensionsPath)\Novell\Novell.MonoDroid.CSharp.targets" />
   <ItemGroup>

Octokit.Reactive/Octokit.Reactive-Monotouch.csproj

@@ -145,6 +145,8 @@
     <Compile Include="Clients\ObservableIssuesLabelsClient.cs" />
     <Compile Include="Clients\IObservableRepositoryCommentsClient.cs" />
     <Compile Include="Clients\ObservableRepositoryCommentsClient.cs" />
+    <Compile Include="Clients\IObservableRepositoryCommitsClients.cs" />
+    <Compile Include="Clients\ObservableRepositoryCommitsClients.cs" />
   </ItemGroup>
   <Import Project="$(MSBuildBinPath)\Microsoft.CSharp.targets" />
   <ItemGroup>

Octokit.Reactive/Octokit.Reactive.csproj

@@ -73,6 +73,7 @@
     <Compile Include="..\SolutionInfo.cs">
       <Link>Properties\SolutionInfo.cs</Link>
     </Compile>
+    <Compile Include="Clients\IObservableRepositoryCommitsClients.cs" />
     <Compile Include="Clients\ObservableRepositoryCommentsClient.cs" />
     <Compile Include="Clients\IObservableRepositoryCommentsClient.cs" />
     <Compile Include="Clients\IObservableDeploymentsClient.cs" />
@@ -87,6 +88,7 @@
     <Compile Include="Clients\IObservableStatisticsClient.cs" />
     <Compile Include="Clients\ObservableFeedsClient.cs" />
     <Compile Include="Clients\ObservableIssuesLabelsClient.cs" />
+    <Compile Include="Clients\ObservableRepositoryCommitsClients.cs" />
     <Compile Include="Clients\ObservableSearchClient.cs" />
     <Compile Include="Clients\IObservableBlobsClient.cs" />
     <Compile Include="Clients\IObservableGistCommentsClient.cs" />

Octokit.Tests.Integration/Clients/RepositoryCommitsClientTests.cs

@@ -0,0 +1,139 @@
+using System;
+using System.Collections.Generic;
+using System.Reactive.Threading.Tasks;
+using System.Threading.Tasks;
+using Octokit;
+using Octokit.Tests.Integration;
+using Xunit;
+
+public class RepositoryCommitsClientTests : IDisposable
+{
+    readonly IGitHubClient _client;
+    IRepositoryCommitsClient _fixture;
+    Repository _repository;
+
+    public RepositoryCommitsClientTests()
+    {
+        _client = new GitHubClient(new ProductHeaderValue("OctokitTests"))
+        {
+            Credentials = Helper.Credentials
+        };
+
+        _fixture = _client.Repository.Commits;
+
+        var repoName = Helper.MakeNameWithTimestamp("source-repo");
+
+        _repository = _client.Repository.Create(new NewRepository { Name = repoName, AutoInit = true }).Result;
+    }
+
+    [IntegrationTest]
+    public async Task CanCompareReferences()
+    {
+        await CreateTheWorld();
+
+        var result = await _fixture.Compare(Helper.UserName, _repository.Name, "master", "my-branch");
+
+        Assert.Equal(1, result.TotalCommits);
+        Assert.Equal(1, result.Commits.Count);
+        Assert.Equal(1, result.AheadBy);
+        Assert.Equal(0, result.BehindBy);
+    }
+
+    [IntegrationTest]
+    public async Task CanCompareReferencesOtherWayRound()
+    {
+        await CreateTheWorld();
+
+        var result = await _fixture.Compare(Helper.UserName, _repository.Name, "my-branch", "master");
+
+        Assert.Equal(0, result.TotalCommits);
+        Assert.Equal(0, result.Commits.Count);
+        Assert.Equal(0, result.AheadBy);
+        Assert.Equal(1, result.BehindBy);
+    }
+
+    [IntegrationTest]
+    public async Task ReturnsUrlsToResources()
+    {
+        await CreateTheWorld();
+
+        var result = await _fixture.Compare(Helper.UserName, _repository.Name, "my-branch", "master");
+
+        Assert.NotNull(result.DiffUrl);
+        Assert.NotNull(result.HtmlUrl);
+        Assert.NotNull(result.PatchUrl);
+        Assert.NotNull(result.PermalinkUrl);
+    }
+
+    [IntegrationTest]
+    public async Task CanCompareUsingSha()
+    {
+        await CreateTheWorld();
+
+        var master = await _client.GitDatabase.Reference.Get(Helper.UserName, _repository.Name, "heads/master");
+        var branch = await _client.GitDatabase.Reference.Get(Helper.UserName, _repository.Name, "heads/my-branch");
+
+        var result = await _fixture.Compare(Helper.UserName, _repository.Name, master.Object.Sha, branch.Object.Sha);
+
+        Assert.Equal(1, result.Commits.Count);
+        Assert.Equal(1, result.AheadBy);
+        Assert.Equal(0, result.BehindBy);
+    }
+
+    async Task CreateTheWorld()
+    {
+        var master = await _client.GitDatabase.Reference.Get(Helper.UserName, _repository.Name, "heads/master");
+
+        // create new commit for master branch
+        var newMasterTree = await CreateTree(new Dictionary<string, string> { { "README.md", "Hello World!" } });
+        var newMaster = await CreateCommit("baseline for pull request", newMasterTree.Sha, master.Object.Sha);
+
+        // update master
+        await _client.GitDatabase.Reference.Update(Helper.UserName, _repository.Name, "heads/master", new ReferenceUpdate(newMaster.Sha));
+
+        // create new commit for feature branch
+        var featureBranchTree = await CreateTree(new Dictionary<string, string> { { "README.md", "I am overwriting this blob with something new" } });
+        var newFeature = await CreateCommit("this is the commit to merge into the pull request", featureBranchTree.Sha, newMaster.Sha);
+
+        // create branch
+        await _client.GitDatabase.Reference.Create(Helper.UserName, _repository.Name, new NewReference("refs/heads/my-branch", newFeature.Sha));
+    }
+
+    async Task<TreeResponse> CreateTree(IDictionary<string, string> treeContents)
+    {
+        var collection = new List<NewTreeItem>();
+
+        foreach (var c in treeContents)
+        {
+            var baselineBlob = new NewBlob
+            {
+                Content = c.Value,
+                Encoding = EncodingType.Utf8
+            };
+            var baselineBlobResult = await _client.GitDatabase.Blob.Create(Helper.UserName, _repository.Name, baselineBlob);
+
+            collection.Add(new NewTreeItem
+            {
+                Type = TreeType.Blob,
+                Mode = FileMode.File,
+                Path = c.Key,
+                Sha = baselineBlobResult.Sha
+            });
+        }
+
+        var newTree = new NewTree { Tree = collection };
+
+        return await _client.GitDatabase.Tree.Create(Helper.UserName, _repository.Name, newTree);
+    }
+
+    async Task<Commit> CreateCommit(string message, string sha, string parent)
+    {
+        var newCommit = new NewCommit(message, sha, parent);
+        return await _client.GitDatabase.Commit.Create(Helper.UserName, _repository.Name, newCommit);
+    }
+
+    public void Dispose()
+    {
+        _client.Repository.Delete(_repository.Owner.Login, _repository.Name);
+    }
+}

Octokit.Tests.Integration/Octokit.Tests.Integration.csproj

@@ -71,6 +71,7 @@
     <Compile Include="Clients\MilestonesClientTests.cs" />
     <Compile Include="Clients\PullRequestsClientTests.cs" />
     <Compile Include="Clients\ReferencesClientTests.cs" />
+    <Compile Include="Clients\RepositoryCommitsClientTests.cs" />
     <Compile Include="Clients\SearchClientTests.cs" />
     <Compile Include="Clients\StatisticsClientTests.cs" />
     <Compile Include="Clients\TreeClientTests.cs" />

Octokit.Tests/Clients/RepositoriesClientTests.cs

@@ -35,7 +35,7 @@ public async Task EnsuresNonNullArguments()
                 await AssertEx.Throws<ArgumentNullException>(async () => await client.Create(null));
                 await AssertEx.Throws<ArgumentException>(async () => await client.Create(new NewRepository { Name = null }));
             }
-            
+
             [Fact]
             public void UsesTheUserReposUrl()
             {
@@ -345,9 +345,9 @@ public async Task ReturnsReadme()
                 var readme = await reposEndpoint.GetReadme("fake", "repo");
 
                 Assert.Equal("README.md", readme.Name);
-                connection.Received().Get<ReadmeResponse>(Arg.Is<Uri>(u => u.ToString() == "repos/fake/repo/readme"), 
+                connection.Received().Get<ReadmeResponse>(Arg.Is<Uri>(u => u.ToString() == "repos/fake/repo/readme"),
                     null);
-                connection.DidNotReceive().GetHtml(Arg.Is<Uri>(u => u.ToString() == "https://github.example.com/readme"), 
+                connection.DidNotReceive().GetHtml(Arg.Is<Uri>(u => u.ToString() == "https://github.example.com/readme"),
                     null);
                 var htmlReadme = await readme.GetHtmlContent();
                 Assert.Equal("<html>README</html>", htmlReadme);
@@ -557,5 +557,52 @@ public void EnsuresNonNullArguments()
                 Assert.Throws<ArgumentException>(() => client.Edit("owner", "", update));
             }
         }
+
+        public class TheCompareMethod
+        {
+            [Fact]
+            public void EnsureNonNullArguments()
+            {
+                var client = new RepositoryCommitsClient(Substitute.For<IApiConnection>());
+
+                Assert.Throws<ArgumentNullException>(() => client.Compare(null, "repo", "base", "head"));
+                Assert.Throws<ArgumentException>(() => client.Compare("", "repo", "base", "head"));
+
+                Assert.Throws<ArgumentNullException>(() => client.Compare("owner", null, "base", "head"));
+                Assert.Throws<ArgumentException>(() => client.Compare("owner", "", "base", "head"));
+
+                Assert.Throws<ArgumentNullException>(() => client.Compare("owner", "repo", null, "head"));
+                Assert.Throws<ArgumentException>(() => client.Compare("owner", "repo", "", "head"));
+
+                Assert.Throws<ArgumentNullException>(() => client.Compare("owner", "repo", "base", null));
+                Assert.Throws<ArgumentException>(() => client.Compare("owner", "repo", "base", ""));
+            }
+
+            [Fact]
+            public void GetsCorrectUrl()
+            {
+                var connection = Substitute.For<IApiConnection>();
+
+                var client = new RepositoryCommitsClient(connection);
+
+                client.Compare("owner", "repo", "base", "head");
+
+                connection.Received()
+                    .Get<CompareResult>(Arg.Is<Uri>(u => u.ToString() == "repos/owner/repo/compare/base...head"), null);
+            }
+
+            [Fact]
+            public void EncodesUrl()
+            {
+                var connection = Substitute.For<IApiConnection>();
+
+                var client = new RepositoryCommitsClient(connection);
+
+                client.Compare("owner", "repo", "base", "shiftkey/my-cool-branch");
+
+                connection.Received()
+                    .Get<CompareResult>(Arg.Is<Uri>(u => u.ToString() == "repos/owner/repo/compare/base...shiftkey%2Fmy-cool-branch"), null);
+            }
+        }
     }
 }

Octokit/Clients/IRepositoriesClient.cs

@@ -176,6 +176,14 @@ public interface IRepositoriesClient
         ///</remarks>
         IStatisticsClient Statistics { get; }
 
+        /// <summary>
+        /// Client for GitHub's Repository Commits API
+        /// </summary>
+        /// <remarks>
+        /// See the <a href="http://developer.github.com/v3/repos/commits/">Commits API documentation</a> for more details
+        ///</remarks>
+        IRepositoryCommitsClient Commits { get; }
+
         /// <summary>
         /// Gets all the branches for the specified repository.
         /// </summary>