From 66d4106a41b82bbe32b2fce3d5883af1e9d0fd7a Mon Sep 17 00:00:00 2001
From: Martin Weinelt <hexa@darmstadt.ccc.de>
Date: Wed, 3 May 2023 13:04:51 +0200
Subject: [PATCH] python310Packages.psycopg: Test against a live postgresql
 instance

provided by postgresqlTestHook. Extends our test coverage on Linux from
250 to over 4000 tests, that run in a reasonable time.
---
 .../python-modules/psycopg/default.nix          | 17 +++++++++++++----
 1 file changed, 13 insertions(+), 4 deletions(-)

diff --git a/pkgs/development/python-modules/psycopg/default.nix b/pkgs/development/python-modules/psycopg/default.nix
index f2678ab25d0f..a61468b5eaca 100644
--- a/pkgs/development/python-modules/psycopg/default.nix
+++ b/pkgs/development/python-modules/psycopg/default.nix
@@ -30,6 +30,7 @@
 , pproxy
 , pytest-randomly
 , pytestCheckHook
+, postgresqlTestHook
 }:
 
 let
@@ -165,10 +166,6 @@ buildPythonPackage rec {
     pool = [ psycopg-pool ];
   };
 
-  preCheck = ''
-    cd ..
-  '';
-
   nativeCheckInputs = [
     anyio
     pproxy
@@ -176,9 +173,21 @@ buildPythonPackage rec {
     pytestCheckHook
     postgresql
   ]
+  ++ lib.optional (stdenv.isLinux) postgresqlTestHook
   ++ passthru.optional-dependencies.c
   ++ passthru.optional-dependencies.pool;
 
+  env = {
+    postgresqlEnableTCP = 1;
+    PGUSER = "psycopg";
+  };
+
+  preCheck = ''
+    cd ..
+  '' + lib.optionalString (stdenv.isLinux) ''
+    export PSYCOPG_TEST_DSN="host=127.0.0.1 user=$PGUSER"
+  '';
+
   disabledTests = [
     # don't depend on mypy for tests
     "test_version"