Display an actual TCP port app is bound to (#3034)

test/io/test_io.py

@@ -197,6 +197,13 @@ def test_flush_pool_no_interrupt(defaultenv):
         t.join()
 
 
+def test_random_port_bound(defaultenv):
+    "PostgREST should bind to a random port when PGRST_SERVER_PORT is 0."
+
+    with run(env=defaultenv, port="0") as postgrest:
+        assert True  # liveness check is done by run(), so we just need to check that it doesn't fail
+
+
 def test_app_settings_reload(tmp_path, defaultenv):
     "App settings should be reloaded from file when PostgREST is sent SIGUSR2."
     config = (CONFIGSDIR / "sigusr2-settings.config").read_text()

test/spec/Main.hs

@@ -74,11 +74,12 @@ main = do
 
   -- cached schema cache so most tests run fast
   baseSchemaCache <- loadSchemaCache pool testCfg
+  sockets <- AppState.initSockets testCfg
 
   let
     -- For tests that run with the same refSchemaCache
     app config = do
-      appState <- AppState.initWithPool pool config
+      appState <- AppState.initWithPool sockets pool config
       AppState.putPgVersion appState actualPgVersion
       AppState.putSchemaCache appState (Just baseSchemaCache)
       return ((), postgrest config appState $ pure ())
@@ -86,7 +87,7 @@ main = do
     -- For tests that run with a different SchemaCache(depends on configSchemas)
     appDbs config = do
       customSchemaCache <- loadSchemaCache pool config
-      appState <- AppState.initWithPool pool config
+      appState <- AppState.initWithPool sockets pool config
       AppState.putPgVersion appState actualPgVersion
       AppState.putSchemaCache appState (Just customSchemaCache)
       return ((), postgrest config appState $ pure ())