public async Task EnsuresNonNullArguments()
{
var client = new ObservableFollowersClient(Substitute.For<IGitHubClient>());
await Assert.ThrowsAsync<ArgumentNullException>(() => client.GetAll(null).ToTask());
await Assert.ThrowsAsync<ArgumentException>(() => client.GetAll("").ToTask());
}
public void RequestsTheCorrectUrl()
{
var githubClient = Substitute.For<IGitHubClient>();
var client = new ObservableFollowersClient(githubClient);
client.GetAll("alfhenrik");
githubClient.Connection.Received(1).Get<List<User>>(
new Uri("users/alfhenrik/followers", UriKind.Relative), null, null);
}