Closes #518

Bunny::Channel#basic_get uses a separate conitnuation data structure, so
if a timeout hits any pending channel-level exceptions won't be thrown
without some extra effort.

lib/bunny/channel.rb

@@ -602,7 +602,12 @@ def basic_get(queue, opts = {:manual_ack => true})
       # we implement them). So we return a triple of nils immediately which apps should be
       # able to handle anyway as "got no message, no need to act". MK.
       last_basic_get_response = if @connection.open?
-                                  wait_on_basic_get_continuations
+                                  begin
+                                    wait_on_basic_get_continuations
+                                  rescue Timeout::Error => e
+                                    raise_if_continuation_resulted_in_a_channel_error!
+                                    raise e
+                                  end
                                 else
                                   [nil, nil, nil]
                                 end

spec/higher_level_api/integration/basic_get_spec.rb

@@ -54,3 +54,27 @@
     end
   end
 end
+
+
+describe Bunny::Channel, "#basic_get" do
+  let(:connection) do
+    c = Bunny.new(username: "bunny_gem", password: "bunny_password", vhost: "bunny_testbed",
+                  automatically_recover: false, continuation_timeout: 3000)
+    c.start
+    c
+  end
+
+  after :each do
+    connection.close if connection.open?
+  end
+
+  context "with a non-existent queue" do
+    it "throws a NOT_FOUND" do
+      ch = connection.create_channel
+
+      expect do
+        ch.basic_get "non_existent_#{rand.to_s}"
+      end.to raise_error(Bunny::NotFound)
+    end
+  end
+end