public async Task EnsuresNonNullArguments()
{
var client = new ObservableFollowersClient(Substitute.For<IGitHubClient>());
await Assert.ThrowsAsync<ArgumentNullException>(() => client.IsFollowing(null, "alfhenrik-test").ToTask());
await Assert.ThrowsAsync<ArgumentException>(() => client.IsFollowing("", "alfhenrik-test").ToTask());
await Assert.ThrowsAsync<ArgumentNullException>(() => client.IsFollowing("alfhenrik", null).ToTask());
await Assert.ThrowsAsync<ArgumentException>(() => client.IsFollowing("alfhenrik", "").ToTask());
}
public void IsFollowingFromClientUserFollowers()
{
var githubClient = Substitute.For<IGitHubClient>();
var client = new ObservableFollowersClient(githubClient);
client.IsFollowing("alfhenrik", "alfhenrik-test");
githubClient.User.Followers.Received()
.IsFollowing("alfhenrik", "alfhenrik-test");
}