test: Reorganize test/ folder into one subdirectory for each test type

test/spec/Feature/RpcSpec.hs

@@ -1155,7 +1155,7 @@ spec actualPgVersion =
             [str|unnamed text arg|]
 
         it "can insert bytea directly" $ do
-          let file = unsafePerformIO $ BL.readFile "test/C.png"
+          let file = unsafePerformIO $ BL.readFile "test/spec/fixtures/image.png"
           r <- request methodPost "/rpc/unnamed_bytea_param"
             [("Content-Type", "application/octet-stream"), ("Accept", "application/octet-stream")]
             file
@@ -1189,7 +1189,7 @@ spec actualPgVersion =
               }
 
         it "will err when no function with single unnamed bytea parameter exists and application/octet-stream is specified" $
-          let file = unsafePerformIO $ BL.readFile "test/C.png" in
+          let file = unsafePerformIO $ BL.readFile "test/spec/fixtures/image.png" in
           request methodPost "/rpc/unnamed_int_param"
               [("Content-Type", "application/octet-stream")]
               file
@@ -1229,7 +1229,7 @@ spec actualPgVersion =
               [str|unnamed text arg|]
             `shouldRespondWith`
               [str|unnamed text arg|]
-          let file = unsafePerformIO $ BL.readFile "test/C.png"
+          let file = unsafePerformIO $ BL.readFile "test/spec/fixtures/image.png"
           r <- request methodPost "/rpc/overloaded_unnamed_param"
             [("Content-Type", "application/octet-stream"), ("Accept", "application/octet-stream")]
             file

test/spec/SpecHelper.hs

@@ -55,7 +55,7 @@ validateOpenApiResponse headers = do
     respHeaders `shouldSatisfy`
       \hs -> ("Content-Type", "application/openapi+json; charset=utf-8") `elem` hs
   let Just body = decode (simpleBody r)
-  Just schema <- liftIO $ decode <$> BL.readFile "test/fixtures/openapi.json"
+  Just schema <- liftIO $ decode <$> BL.readFile "test/spec/fixtures/openapi.json"
   let args :: M.Map Text Value
       args = M.fromList
         [ ( "schema", schema )