Add a basic test.

fixtures/async/discord/client_context.rb

@@ -0,0 +1,20 @@
+require "async/discord/client"
+require "sus/fixtures/async/reactor_context"
+
+module Async
+	module Discord
+		DISCORD_BOT_TOKEN = ENV.fetch("DISCORD_BOT_TOKEN")
+
+		ClientContext = Sus::Shared("client context") do
+			include Sus::Fixtures::Async::ReactorContext
+
+			def authenticated_client
+				client = Async::Discord::Client.open
+
+				return client.authenticated(bot: DISCORD_BOT_TOKEN)
+			end
+
+			let(:client) {authenticated_client}
+		end
+	end
+end

gems.rb

@@ -22,4 +22,7 @@
 	gem "rubocop"
 
 	gem "sus-fixtures-async-http"
+
+	gem "bake-test"
+	gem "bake-test-external"
 end

lib/async/discord/guilds.rb

@@ -27,6 +27,10 @@ def each(&block)
 			def to_a
 				each.to_a
 			end
+
+			def empty?
+				self.value.empty?
+			end
 		end
 	end
 end

test/async/discord/client.rb

@@ -0,0 +1,14 @@
+require "async/discord/client_context"
+
+describe Async::Discord::Client do
+	include Async::Discord::ClientContext
+
+	with "#guilds" do
+		it "can list guilds" do
+			guilds = client.guilds
+
+			expect(guilds).to be_a(Async::Discord::Guilds)
+			expect(guilds).not.to be(:empty?)
+		end
+	end
+end