nix(test): add test suite for observability tests

- Create separate test suite for observability tests

- Create wrapper script `postgrest-test-observability`

- Add to CI and `postgrest-check`

- Move JWT cache tests under observability tests

Signed-off-by: Taimoor Zaeem <taimoorzaeem@gmail.com>

test/observability/Main.hs

@@ -0,0 +1,54 @@
+module Main where
+
+import qualified Hasql.Pool                 as P
+import qualified Hasql.Pool.Config          as P
+import qualified Hasql.Transaction.Sessions as HT
+
+import Data.Function (id)
+
+import           PostgREST.App             (postgrest)
+import qualified PostgREST.AppState        as AppState
+import           PostgREST.Config          (AppConfig (..))
+import           PostgREST.Config.Database (queryPgVersion)
+import qualified PostgREST.Logger          as Logger
+import qualified PostgREST.Metrics         as Metrics
+import           PostgREST.SchemaCache     (querySchemaCache)
+
+import qualified Observation.JwtCache
+
+import ObsHelper
+import Protolude  hiding (toList, toS)
+import Test.Hspec
+
+main :: IO ()
+main = do
+  pool <- P.acquire $ P.settings
+    [ P.size 3
+    , P.acquisitionTimeout 10
+    , P.agingTimeout 60
+    , P.idlenessTimeout 60
+    , P.staticConnectionSettings (toUtf8 $ configDbUri testCfg)
+    ]
+
+  actualPgVersion <- either (panic . show) id <$> P.use pool (queryPgVersion False)
+
+  -- cached schema cache so most tests run fast
+  baseSchemaCache <- loadSCache pool testCfg
+  loggerState <- Logger.init
+  metricsState <- Metrics.init (configDbPoolSize testCfg)
+
+  let
+    initApp sCache st config = do
+      appState <- AppState.initWithPool pool config loggerState metricsState (Metrics.observationMetrics metricsState)
+      AppState.putPgVersion appState actualPgVersion
+      AppState.putSchemaCache appState (Just sCache)
+      return (st, postgrest (configLogLevel config) appState (pure ()))
+
+  -- Run all test modules
+  hspec $ do
+    before (initApp baseSchemaCache metricsState testCfgJwtCache) $
+      describe "Observation.JwtCacheObs" Observation.JwtCache.spec
+
+  where
+    loadSCache pool conf =
+      either (panic.show) id <$> P.use pool (HT.transaction HT.ReadCommitted HT.Read $ querySchemaCache conf)