Adding a test for checkout

Author: StanleyGoldman

test/GitHub.App.UnitTests/Services/PullRequestServiceTests.cs

@@ -777,6 +777,35 @@ public async Task ShouldCheckoutLocalBranchAsync()
             Assert.That(4, Is.EqualTo(gitClient.ReceivedCalls().Count()));
         }
 
+        [Test]
+        public async Task ShouldCheckoutLocalBranchOwnerCaseMismatchAsync()
+        {
+            var gitClient = MockGitClient();
+            var service = CreateTarget(gitClient, MockGitService());
+
+            var localRepo = Substitute.For<ILocalRepositoryModel>();
+            localRepo.CloneUrl.Returns(new UriString("https://foo.bar/Owner/repo"));
+
+            var pr = new PullRequestDetailModel
+            {
+                Number = 5,
+                BaseRefName = "master",
+                BaseRefSha = "123",
+                BaseRepositoryOwner = "owner",
+                HeadRefName = "prbranch",
+                HeadRefSha = "123",
+                HeadRepositoryOwner = "owner",
+            };
+
+            await service.Checkout(localRepo, pr, "prbranch");
+
+            gitClient.Received().Fetch(Arg.Any<IRepository>(), "origin").Forget();
+            gitClient.Received().Checkout(Arg.Any<IRepository>(), "prbranch").Forget();
+            gitClient.Received().SetConfig(Arg.Any<IRepository>(), "branch.prbranch.ghfvs-pr-owner-number", "owner#5").Forget();
+
+            Assert.That(4, Is.EqualTo(gitClient.ReceivedCalls().Count()));
+        }
+
         [Test]
         public async Task ShouldCheckoutBranchFromForkAsync()
         {