Add new fields to NewRepository request and update RepositoriesClient.Create() method to specify preview accepts header and fix impacted unit tests

Add integration test for Create Repository with merge method specified

Octokit.Tests.Integration/Clients/RepositoriesClientTests.cs

@@ -268,6 +268,36 @@ public class RepositoriesClientTests
                 Task.WhenAll(deleteRepos).Wait();
             }
         }
+
+        [IntegrationTest]
+        public async Task CreatesARepositoryWithRequestedMergeMethod()
+        {
+            var github = Helper.GetAuthenticatedClient();
+            var repoName = Helper.MakeNameWithTimestamp("public-repo");
+
+            var newRepository = new NewRepository(repoName)
+            {
+                AllowMergeCommit = false,
+                AllowSquashMerge = true,
+                AllowRebaseMerge = false
+            };
+
+            using (var context = await github.CreateRepositoryContext(newRepository))
+            {
+                var createdRepository = context.Repository;
+
+                Assert.Equal(repoName, createdRepository.Name);
+                Assert.False(createdRepository.AllowMergeCommit);
+                Assert.True(createdRepository.AllowSquashMerge);
+                Assert.False(createdRepository.AllowRebaseMerge);
+
+                var repository = await github.Repository.Get(Helper.UserName, repoName);
+                Assert.Equal(repoName, repository.Name);
+                Assert.False(repository.AllowMergeCommit);
+                Assert.True(repository.AllowSquashMerge);
+                Assert.False(repository.AllowRebaseMerge);
+            }
+        }
     }
 
     public class TheCreateMethodForOrganization

Octokit.Tests/Clients/RepositoriesClientTests.cs

@@ -40,7 +40,7 @@ namespace Octokit.Tests.Clients
 
                 client.Create(new NewRepository("aName"));
 
-                connection.Received().Post<Repository>(Arg.Is<Uri>(u => u.ToString() == "user/repos"), Arg.Any<NewRepository>());
+                connection.Received().Post<Repository>(Arg.Is<Uri>(u => u.ToString() == "user/repos"), Arg.Any<NewRepository>(), "application/vnd.github.polaris-preview+json");
             }
 
             [Fact]
@@ -52,7 +52,7 @@ namespace Octokit.Tests.Clients
 
                 client.Create(newRepository);
 
-                connection.Received().Post<Repository>(Args.Uri, newRepository);
+                connection.Received().Post<Repository>(Args.Uri, newRepository, "application/vnd.github.polaris-preview+json");
             }
 
             [Fact]
@@ -68,7 +68,7 @@ namespace Octokit.Tests.Clients
                 var connection = Substitute.For<IApiConnection>();
                 connection.Connection.BaseAddress.Returns(GitHubClient.GitHubApiUrl);
                 connection.Connection.Credentials.Returns(credentials);
-                connection.Post<Repository>(Args.Uri, newRepository)
+                connection.Post<Repository>(Args.Uri, newRepository, "application/vnd.github.polaris-preview+json")
                     .Returns<Task<Repository>>(_ => { throw new ApiValidationException(response); });
                 var client = new RepositoriesClient(connection);
 
@@ -95,7 +95,7 @@ namespace Octokit.Tests.Clients
                 var connection = Substitute.For<IApiConnection>();
                 connection.Connection.BaseAddress.Returns(GitHubClient.GitHubApiUrl);
                 connection.Connection.Credentials.Returns(credentials);
-                connection.Post<Repository>(Args.Uri, newRepository)
+                connection.Post<Repository>(Args.Uri, newRepository, "application/vnd.github.polaris-preview+json")
                     .Returns<Task<Repository>>(_ => { throw new ApiValidationException(response); });
                 var client = new RepositoriesClient(connection);
 
@@ -127,7 +127,8 @@ namespace Octokit.Tests.Clients
 
                 connection.Received().Post<Repository>(
                     Arg.Is<Uri>(u => u.ToString() == "orgs/theLogin/repos"),
-                    Args.NewRepository);
+                    Args.NewRepository,
+                    "application/vnd.github.polaris-preview+json");
             }
 
             [Fact]
@@ -139,7 +140,7 @@ namespace Octokit.Tests.Clients
 
                 await client.Create("aLogin", newRepository);
 
-                connection.Received().Post<Repository>(Args.Uri, newRepository);
+                connection.Received().Post<Repository>(Args.Uri, newRepository, "application/vnd.github.polaris-preview+json");
             }
 
             [Fact]
@@ -153,7 +154,7 @@ namespace Octokit.Tests.Clients
                     + @"""code"":""custom"",""field"":""name"",""message"":""name already exists on this account""}]}");
                 var connection = Substitute.For<IApiConnection>();
                 connection.Connection.BaseAddress.Returns(GitHubClient.GitHubApiUrl);
-                connection.Post<Repository>(Args.Uri, newRepository)
+                connection.Post<Repository>(Args.Uri, newRepository, "application/vnd.github.polaris-preview+json")
                     .Returns<Task<Repository>>(_ => { throw new ApiValidationException(response); });
                 var client = new RepositoriesClient(connection);
 
@@ -178,7 +179,7 @@ namespace Octokit.Tests.Clients
                     + @"""http://developer.github.com/v3/repos/#create"",""errors"":[]}");
                 var connection = Substitute.For<IApiConnection>();
                 connection.Connection.BaseAddress.Returns(GitHubClient.GitHubApiUrl);
-                connection.Post<Repository>(Args.Uri, newRepository)
+                connection.Post<Repository>(Args.Uri, newRepository, "application/vnd.github.polaris-preview+json")
                     .Returns<Task<Repository>>(_ => { throw new ApiValidationException(response); });
                 var client = new RepositoriesClient(connection);
 
@@ -199,7 +200,7 @@ namespace Octokit.Tests.Clients
                     + @"""code"":""custom"",""field"":""name"",""message"":""name already exists on this account""}]}");
                 var connection = Substitute.For<IApiConnection>();
                 connection.Connection.BaseAddress.Returns(new Uri("https://example.com"));
-                connection.Post<Repository>(Args.Uri, newRepository)
+                connection.Post<Repository>(Args.Uri, newRepository, "application/vnd.github.polaris-preview+json")
                     .Returns<Task<Repository>>(_ => { throw new ApiValidationException(response); });
                 var client = new RepositoriesClient(connection);
 

Octokit/Clients/RepositoriesClient.cs

@@ -82,7 +82,7 @@ namespace Octokit
         {
             try
             {
-                return await ApiConnection.Post<Repository>(url, newRepository).ConfigureAwait(false);
+                return await ApiConnection.Post<Repository>(url, newRepository, AcceptHeaders.SquashCommitPreview).ConfigureAwait(false);
             }
             catch (ApiValidationException e)
             {

Octokit/Models/Request/NewRepository.cs

@@ -82,6 +82,21 @@ namespace Octokit
         /// </summary>
         public int? TeamId { get; set; }
 
+        /// <summary>
+        /// Optional. Allows the "Rebase and Merge" method to be used.
+        /// </summary>
+        public bool? AllowRebaseMerge { get; set; }
+
+        /// <summary>
+        /// Optional. Allows the "Squash Merge" merge method to be used.
+        /// </summary>
+        public bool? AllowSquashMerge { get; set; }
+
+        /// <summary>
+        /// Optional. Allows the "Create a merge commit" merge method to be used.
+        /// </summary>
+        public bool? AllowMergeCommit { get; set; }
+
         internal string DebuggerDisplay
         {
             get