From f8dad4c72321db5fceb61ce8a4f5df30ec88f88d Mon Sep 17 00:00:00 2001
From: Junya Morioka <mjun@mjunya.com>
Date: Tue, 8 Sep 2026 08:05:17 +0900
Subject: [PATCH] feat: run pytest in parallel with pytest-xdist by default

- Add pytest-xdist to the dev group and regenerate uv.lock
- Pass --numprocesses=auto through [tool.pytest] addopts so every pytest
  invocation, local or CI, distributes tests across all CPU cores
---
 template/pyproject.toml | 11 +++++++++--
 template/uv.lock        | 24 ++++++++++++++++++++++++
 2 files changed, 33 insertions(+), 2 deletions(-)

diff --git a/template/pyproject.toml b/template/pyproject.toml
index 686d902..9c7632b 100644
--- a/template/pyproject.toml
+++ b/template/pyproject.toml
@@ -22,7 +22,14 @@ build-backend = "hatchling.build"
 packages = ["src/{{package_name}}"]
 
 [dependency-groups]
-dev = ["prek>=0.5.2", "pytest>=9.1.1", "pytest-cov>=7.1.0", "ruff>=0.16.6", "ty>=0.0.78"]
+dev = [
+    "prek>=0.5.2",
+    "pytest>=9.1.1",
+    "pytest-cov>=7.1.0",
+    "pytest-xdist>=3.8.0",
+    "ruff>=0.16.6",
+    "ty>=0.0.78",
+]
 
 [tool.ruff]
 line-length = 100
@@ -82,7 +89,7 @@ convention = "google"
 
 [tool.pytest]
 testpaths = ["tests"]
-addopts = ["-ra", "--strict-markers", "--strict-config"]
+addopts = ["-ra", "--strict-markers", "--strict-config", "--numprocesses=auto"]
 xfail_strict = true
 
 [tool.coverage.run]
diff --git a/template/uv.lock b/template/uv.lock
index 5d2d46d..216da90 100644
--- a/template/uv.lock
+++ b/template/uv.lock
@@ -154,6 +154,7 @@ dev = [
     { name = "prek" },
     { name = "pytest" },
     { name = "pytest-cov" },
+    { name = "pytest-xdist" },
     { name = "ruff" },
     { name = "ty" },
 ]
@@ -165,6 +166,7 @@ dev = [
     { name = "prek", specifier = ">=0.5.2" },
     { name = "pytest", specifier = ">=9.1.1" },
     { name = "pytest-cov", specifier = ">=7.1.0" },
+    { name = "pytest-xdist", specifier = ">=3.8.0" },
     { name = "ruff", specifier = ">=0.16.6" },
     { name = "ty", specifier = ">=0.0.78" },
 ]
@@ -181,6 +183,15 @@ wheels = [
     { url = "https://files.pythonhosted.org/packages/8a/0e/97c33bf5009bdbac74fd2beace167cab3f978feb69cc36f1ef79360d6c4e/exceptiongroup-1.3.1-py3-none-any.whl", hash = "sha256:a7a39a3bd276781e98394987d3a5701d0c4edffb633bb7a5144577f82c773598", size = 16740, upload-time = "2025-11-21T23:01:53.443Z" },
 ]
 
+[[package]]
+name = "execnet"
+version = "2.1.2"
+source = { registry = "https://pypi.org/simple" }
+sdist = { url = "https://files.pythonhosted.org/packages/bf/89/780e11f9588d9e7128a3f87788354c7946a9cbb1401ad38a48c4db9a4f07/execnet-2.1.2.tar.gz", hash = "sha256:63d83bfdd9a23e35b9c6a3261412324f964c2ec8dcd8d3c6916ee9373e0befcd", size = 166622, upload-time = "2025-11-12T09:56:37.75Z" }
+wheels = [
+    { url = "https://files.pythonhosted.org/packages/ab/84/02fc1827e8cdded4aa65baef11296a9bbe595c474f0d6d758af082d849fd/execnet-2.1.2-py3-none-any.whl", hash = "sha256:67fba928dd5a544b783f6056f449e5e3931a5c378b128bc18501f7ea79e296ec", size = 40708, upload-time = "2025-11-12T09:56:36.333Z" },
+]
+
 [[package]]
 name = "iniconfig"
 version = "2.3.0"
@@ -265,6 +276,19 @@ wheels = [
     { url = "https://files.pythonhosted.org/packages/9d/7a/d968e294073affff457b041c2be9868a40c1c71f4a35fcc1e45e5493067b/pytest_cov-7.1.0-py3-none-any.whl", hash = "sha256:a0461110b7865f9a271aa1b51e516c9a95de9d696734a2f71e3e78f46e1d4678", size = 22876, upload-time = "2026-03-21T20:11:14.438Z" },
 ]
 
+[[package]]
+name = "pytest-xdist"
+version = "3.8.0"
+source = { registry = "https://pypi.org/simple" }
+dependencies = [
+    { name = "execnet" },
+    { name = "pytest" },
+]
+sdist = { url = "https://files.pythonhosted.org/packages/78/b4/439b179d1ff526791eb921115fca8e44e596a13efeda518b9d845a619450/pytest_xdist-3.8.0.tar.gz", hash = "sha256:7e578125ec9bc6050861aa93f2d59f1d8d085595d6551c2c90b6f4fad8d3a9f1", size = 88069, upload-time = "2025-07-01T13:30:59.346Z" }
+wheels = [
+    { url = "https://files.pythonhosted.org/packages/ca/31/d4e37e9e550c2b92a9cbc2e4d0b7420a27224968580b5a447f420847c975/pytest_xdist-3.8.0-py3-none-any.whl", hash = "sha256:202ca578cfeb7370784a8c33d6d05bc6e13b4f25b5053c30a152269fd10f0b88", size = 46396, upload-time = "2025-07-01T13:30:56.632Z" },
+]
+
 [[package]]
 name = "ruff"
 version = "0.16.6"