public async Task EnsuresNonNullArguments()
            {
                var client = new ObservableRepositoryBranchesClient(Substitute.For<IGitHubClient>());
                var newTeams = new BranchProtectionTeamCollection() { "test" };

                Assert.Throws<ArgumentNullException>(() => client.AddProtectedBranchTeamRestrictions(null, "repo", "branch", newTeams));
                Assert.Throws<ArgumentNullException>(() => client.AddProtectedBranchTeamRestrictions("owner", null, "branch", newTeams));
                Assert.Throws<ArgumentNullException>(() => client.AddProtectedBranchTeamRestrictions("owner", "repo", null, newTeams));
                Assert.Throws<ArgumentNullException>(() => client.AddProtectedBranchTeamRestrictions("owner", "repo", "branch", null));

                Assert.Throws<ArgumentNullException>(() => client.AddProtectedBranchTeamRestrictions(1, null, newTeams));
                Assert.Throws<ArgumentNullException>(() => client.AddProtectedBranchTeamRestrictions(1, "branch", null));

                Assert.Throws<ArgumentException>(() => client.AddProtectedBranchTeamRestrictions("", "repo", "branch", newTeams));
                Assert.Throws<ArgumentException>(() => client.AddProtectedBranchTeamRestrictions("owner", "", "branch", newTeams));
                Assert.Throws<ArgumentException>(() => client.AddProtectedBranchTeamRestrictions("owner", "repo", "", newTeams));

                Assert.Throws<ArgumentException>(() => client.AddProtectedBranchTeamRestrictions(1, "", newTeams));
            }
            public void RequestsTheCorrectUrlWithRepositoryId()
            {
                var gitHubClient = Substitute.For<IGitHubClient>();
                var client = new ObservableRepositoryBranchesClient(gitHubClient);
                var newTeams = new BranchProtectionTeamCollection() { "test" };

                client.AddProtectedBranchTeamRestrictions(1, "branch", newTeams);

                gitHubClient.Repository.Branch.Received()
                    .AddProtectedBranchTeamRestrictions(1, "branch", newTeams);
            }