From 9b1dd33f0654e9c61e0cf5acae75a63c410bb108 Mon Sep 17 00:00:00 2001
From: Martin Weinelt <hexa@darmstadt.ccc.de>
Date: Tue, 2 Feb 2021 15:41:16 +0100
Subject: [PATCH] python3Packages.sqlalchemy: parallelize tests with xdist

Cuts down the test phase from 11 to 4 minutes on my remote builder.
---
 pkgs/development/python-modules/sqlalchemy/default.nix | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/pkgs/development/python-modules/sqlalchemy/default.nix b/pkgs/development/python-modules/sqlalchemy/default.nix
index 52c5e27fd58..6f5fb557866 100644
--- a/pkgs/development/python-modules/sqlalchemy/default.nix
+++ b/pkgs/development/python-modules/sqlalchemy/default.nix
@@ -2,6 +2,7 @@
 , mock
 , pysqlite
 , pytestCheckHook
+, pytest_xdist
 }:
 
 buildPythonPackage rec {
@@ -23,9 +24,12 @@ buildPythonPackage rec {
 
   checkInputs = [
     pytestCheckHook
+    pytest_xdist
     mock
   ] ++ lib.optional (!isPy3k) pysqlite;
 
+  pytestFlagsArray = [ "-n auto" ];
+
   postInstall = ''
     sed -e 's:--max-worker-restart=5::g' -i setup.cfg
   '';