public async Task EnsuresNonNullArguments()
            {
                var client = new IssuesLabelsClient(Substitute.For <IApiConnection>());

                await AssertEx.Throws <ArgumentNullException>(async() => await client.GetForMilestone(null, "name", 42));

                await AssertEx.Throws <ArgumentNullException>(async() => await client.GetForMilestone("owner", null, 42));
            }
            public void GetsCorrectUrl()
            {
                var connection = Substitute.For <IApiConnection>();
                var client     = new IssuesLabelsClient(connection);

                client.GetForMilestone("fake", "repo", 42);

                connection.Received().GetAll <Label>(Arg.Is <Uri>(u => u.ToString() == "repos/fake/repo/milestones/42/labels"));
            }
            public async Task EnsuresNonNullArguments()
            {
                var client = new IssuesLabelsClient(Substitute.For<IApiConnection>());

                await AssertEx.Throws<ArgumentNullException>(async () => await client.GetForMilestone(null, "name", 42));
                await AssertEx.Throws<ArgumentNullException>(async () => await client.GetForMilestone("owner", null, 42));
            }
            public void GetsCorrectUrl()
            {
                var connection = Substitute.For<IApiConnection>();
                var client = new IssuesLabelsClient(connection);

                client.GetForMilestone("fake", "repo", 42);

                connection.Received().GetAll<Label>(Arg.Is<Uri>(u => u.ToString() == "repos/fake/repo/milestones/42/labels"));
            }