public async Task EnsuresArgumentsNotNullOrEmpty()
{
var connection = Substitute.For<IApiConnection>();
var client = new IssueCommentsClient(connection);
await AssertEx.Throws<ArgumentNullException>(async () => await client.Delete(null, "name", 42));
await AssertEx.Throws<ArgumentException>(async () => await client.Delete("", "name", 42));
await AssertEx.Throws<ArgumentNullException>(async () => await client.Delete("owner", null, 42));
await AssertEx.Throws<ArgumentException>(async () => await client.Delete("owner", "", 42));
}