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88 lines
3.4 KiB
Haskell
88 lines
3.4 KiB
Haskell
module Semantic.Stat.Spec (spec) where
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import Control.Exception
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import Network.Socket hiding (recv)
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import Network.Socket.ByteString
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import Semantic.Telemetry.Stat
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import Semantic.Config
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import System.Environment
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import SpecHelpers
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withSocketPair :: ((Socket, Socket) -> IO c) -> IO c
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withSocketPair = bracket create release
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where create = socketPair AF_UNIX Datagram defaultProtocol
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release (client, server) = close client >> close server
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withEnvironment :: String -> String -> (() -> IO ()) -> IO ()
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withEnvironment key value = bracket (setEnv key value) (const (unsetEnv key))
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-- NOTE: These cannot easily run in parallel because we test things like
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-- setting/unsetting the environment.
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spec :: Spec
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spec = do
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describe "defaultStatsClient" $ do
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it "sets appropriate defaults" $ do
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StatsClient{..} <- defaultStatsClient
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statsClientNamespace `shouldBe` "semantic"
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statsClientUDPHost `shouldBe` "127.0.0.1"
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statsClientUDPPort `shouldBe` "28125"
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around (withEnvironment "STATS_ADDR" "localhost:8125") $
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it "takes STATS_ADDR from environment" $ do
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StatsClient{..} <- defaultStatsClient
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statsClientUDPHost `shouldBe` "localhost"
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statsClientUDPPort `shouldBe` "8125"
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around (withEnvironment "STATS_ADDR" "localhost") $
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it "handles STATS_ADDR with just hostname" $ do
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StatsClient{..} <- defaultStatsClient
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statsClientUDPHost `shouldBe` "localhost"
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statsClientUDPPort `shouldBe` "28125"
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around (withEnvironment "DOGSTATSD_HOST" "0.0.0.0") $
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it "takes DOGSTATSD_HOST from environment" $ do
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StatsClient{..} <- defaultStatsClient
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statsClientUDPHost `shouldBe` "0.0.0.0"
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statsClientUDPPort `shouldBe` "28125"
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describe "renderDatagram" $ do
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let key = "app.metric"
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describe "counters" $ do
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it "renders increment" $
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renderDatagram "" (increment key []) `shouldBe` "app.metric:1|c"
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it "renders decrement" $
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renderDatagram "" (decrement key []) `shouldBe` "app.metric:-1|c"
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it "renders count" $
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renderDatagram "" (count key 8 []) `shouldBe` "app.metric:8|c"
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it "renders statsClientNamespace" $
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renderDatagram "pre" (increment key []) `shouldBe` "pre.app.metric:1|c"
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describe "tags" $ do
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it "renders a tag" $ do
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let inc = increment key [("key", "value")]
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renderDatagram "" inc `shouldBe` "app.metric:1|c|#key:value"
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it "renders a tag without value" $ do
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let inc = increment key [("a", "")]
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renderDatagram "" inc `shouldBe` "app.metric:1|c|#a"
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it "renders tags" $ do
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let inc = increment key [("key", "value"), ("a", "true")]
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renderDatagram "" inc `shouldBe` "app.metric:1|c|#key:value,a:true"
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it "renders tags without value" $ do
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let inc = increment key [("key", "value"), ("a", "")]
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renderDatagram "" inc `shouldBe` "app.metric:1|c|#key:value,a"
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describe "sendStat" $
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it "delivers datagram" $ do
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client@StatsClient{..} <- defaultStatsClient
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withSocketPair $ \(clientSoc, serverSoc) -> do
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sendStat client { statsClientUDPSocket = clientSoc } (increment "app.metric" [])
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info <- recv serverSoc 1024
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info `shouldBe` "semantic.app.metric:1|c"
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-- Defaults are all driven by defaultConfig.
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defaultStatsClient :: IO StatsClient
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defaultStatsClient = defaultConfig defaultOptions >>= \Config{..} -> statsClient configStatsHost configStatsPort configAppName
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