octokit.net/Octokit.Tests/Clients/AssigneesClientTests.cs

using System;
using System.Collections.Generic;
using System.Net;
using System.Threading.Tasks;
using NSubstitute;
using Octokit;
using Octokit.Internal;
using Octokit.Tests.Helpers;
using Xunit;
using Xunit.Extensions;

public class AssignessClientTests
{
    public class TheGetForRepositoryMethod
    {
        [Fact]
        public void RequestsCorrectUrl()
        {
            var connection = Substitute.For<IApiConnection>();
            var client = new AssigneesClient(connection);

            client.GetForRepository("fake", "repo");

            connection.Received().GetAll<User>(Arg.Is<Uri>(u => u.ToString() == "/repos/fake/repo/assignees"));
        }

        [Fact]
        public async Task EnsuresNonNullArguments()
        {
            var client = new AssigneesClient(Substitute.For<IApiConnection>());

            await AssertEx.Throws<ArgumentNullException>(async () => await client.GetForRepository(null, "name"));
            await AssertEx.Throws<ArgumentException>(async () => await client.GetForRepository(null, ""));
            await AssertEx.Throws<ArgumentNullException>(async () => await client.GetForRepository("owner", null));
            await AssertEx.Throws<ArgumentException>(async () => await client.GetForRepository("", null));
        }
    }

    public class TheCheckAssigneeMethod
    {
        [Theory]
        [InlineData(HttpStatusCode.NoContent, true)]
        [InlineData(HttpStatusCode.NotFound, false)]
        public async Task RequestsCorrectValueForStatusCode(HttpStatusCode status, bool expected)
        {
            var response = Task.Factory.StartNew<IResponse<object>>(() =>
                new ApiResponse<object> { StatusCode = status });
            var connection = Substitute.For<IConnection>();
            connection.GetAsync<object>(Arg.Is<Uri>(u => u.ToString() == "/repos/foo/bar/assignees/cody"),
                null, null).Returns(response);
            var apiConnection = Substitute.For<IApiConnection>();
            apiConnection.Connection.Returns(connection);
            var client = new AssigneesClient(apiConnection);

            var result = await client.CheckAssignee("foo", "bar", "cody");

            Assert.Equal(expected, result);
        }

        [Fact]
        public async Task ThrowsExceptionForInvalidStatusCode()
        {
            var response = Task.Factory.StartNew<IResponse<object>>(() =>
                new ApiResponse<object> { StatusCode = HttpStatusCode.Conflict });
            var connection = Substitute.For<IConnection>();
            connection.GetAsync<object>(Arg.Is<Uri>(u => u.ToString() == "/repos/foo/bar/assignees/cody"),
                null, null).Returns(response);
            var apiConnection = Substitute.For<IApiConnection>();
            apiConnection.Connection.Returns(connection);
            var client = new AssigneesClient(apiConnection);

            AssertEx.Throws<ApiException>(async () => await client.CheckAssignee("foo", "bar", "cody"));
        }

        [Fact]
        public async Task EnsuresNonNullArguments()
        {
            var client = new AssigneesClient(Substitute.For<IApiConnection>());

            await AssertEx.Throws<ArgumentNullException>(async () => await client.CheckAssignee(null, "name", "tweety"));
            await AssertEx.Throws<ArgumentException>(async () => await client.CheckAssignee(null, "", "tweety"));
            await AssertEx.Throws<ArgumentNullException>(async () => await client.CheckAssignee("owner", null, "tweety"));
            await AssertEx.Throws<ArgumentException>(async () => await client.CheckAssignee("", null, "tweety"));
            await AssertEx.Throws<ArgumentNullException>(async () => await client.CheckAssignee("owner", "name", null));
            await AssertEx.Throws<ArgumentException>(async () => await client.CheckAssignee("owner", "name", ""));
        }
    }

    public class TheCtor
    {
        [Fact]
        public void EnsuresArgument()
        {
            Assert.Throws<ArgumentNullException>(() => new AssigneesClient(null));
        }
    }
}