Install test dependencies from requirements.txt in CI

Author: timohl

.appveyor.yml

@@ -17,7 +17,7 @@ install:
     if ($env:PLATFORM -eq "x64") { $env:PYTHON = "$env:PYTHON-x64" }
     $env:PATH = "C:\Python$env:PYTHON\;C:\Python$env:PYTHON\Scripts\;$env:PATH"
     python -W ignore -m pip install --upgrade pip wheel
-    python -W ignore -m pip install pytest numpy --no-warn-script-location pytest-timeout
+    python -W ignore -m pip install --no-warn-script-location -r tests/requirements.txt
 - ps: |
     Start-FileDownload 'https://gitlab.com/libeigen/eigen/-/archive/3.3.7/eigen-3.3.7.zip'
     7z x eigen-3.3.7.zip -y > $null

.github/workflows/ci.yml

@@ -343,8 +343,16 @@ jobs:
     steps:
     - uses: actions/checkout@v4
 
-    - name: Add wget and python3
-      run: apt-get update && apt-get install -y python3-dev python3-numpy python3-pytest libeigen3-dev
+    - name: Add python3
+      run: apt-get update && apt-get install -y python3-dev libeigen3-dev
+
+    - name: Install uv
+      uses: astral-sh/setup-uv@v6
+      with:
+        enable-cache: true
+
+    - name: Prepare env
+      run: uv pip install --python=python3 --system -r tests/requirements.txt
 
     - name: Configure
       shell: bash
@@ -380,7 +388,15 @@ jobs:
 
     # tzdata will try to ask for the timezone, so set the DEBIAN_FRONTEND
     - name: Install 🐍 3
-      run: apt-get update && DEBIAN_FRONTEND="noninteractive" apt-get install -y cmake git python3-dev python3-pytest python3-numpy
+      run: apt-get update && DEBIAN_FRONTEND="noninteractive" apt-get install -y cmake git python3-dev
+
+    - name: Install uv
+      uses: astral-sh/setup-uv@v6
+      with:
+        enable-cache: true
+
+    - name: Prepare env
+      run: uv pip install --python=python3 --system -r tests/requirements.txt
 
     - name: Configure
       run: cmake -S . -B build -DPYBIND11_CUDA_TESTS=ON -DPYBIND11_WERROR=ON -DDOWNLOAD_CATCH=ON
@@ -455,11 +471,11 @@ jobs:
     - name: Install 🐍 3 & NVHPC
       run: |
         sudo apt-get update -y && \
-        sudo apt-get install -y cmake environment-modules git python3-dev python3-pip python3-numpy && \
+        sudo apt-get install -y cmake environment-modules git python3-dev python3-pip && \
         sudo apt-get install -y --no-install-recommends nvhpc-23-5 && \
         sudo rm -rf /var/lib/apt/lists/*
         python3 -m pip install --upgrade pip
-        python3 -m pip install --upgrade pytest
+        python3 -m pip install --system -r tests/requirements.txt
 
     # On some systems, you many need further workarounds:
     # https://github.com/pybind/pybind11/pull/2475
@@ -506,10 +522,15 @@ jobs:
     - uses: actions/checkout@v4
 
     - name: Add Python 3
-      run: apt-get update; apt-get install -y python3-dev python3-numpy python3-pytest python3-pip libeigen3-dev
+      run: apt-get update; apt-get install -y python3-dev libeigen3-dev
 
-    - name: Update pip
-      run: python3 -m pip install --upgrade pip
+    - name: Install uv
+      uses: astral-sh/setup-uv@v6
+      with:
+        enable-cache: true
+
+    - name: Prepare env
+      run: uv pip install --python=python3 --system -r tests/requirements.txt
 
     - name: Update CMake
       uses: jwlawson/actions-setup-cmake@v2.0
@@ -724,7 +745,7 @@ jobs:
       run: |
         apt-get update
         apt-get install -y git make cmake g++ libeigen3-dev python3-dev python3-pip
-        pip3 install "pytest==6.*"
+        pip3 install -r tests/requirements.txt
 
     - name: Configure for install
       run: >
@@ -977,7 +998,6 @@ jobs:
           mingw-w64-${{matrix.env}}-python-pip
           mingw-w64-${{matrix.env}}-cmake
           mingw-w64-${{matrix.env}}-make
-          mingw-w64-${{matrix.env}}-python-pytest
           mingw-w64-${{matrix.env}}-boost
           mingw-w64-${{matrix.env}}-catch
 
@@ -986,12 +1006,19 @@ jobs:
       with:
         msystem: ${{matrix.sys}}
         install: >-
-          mingw-w64-${{matrix.env}}-python-numpy
-          mingw-w64-${{matrix.env}}-python-scipy
           mingw-w64-${{matrix.env}}-eigen3
 
     - uses: actions/checkout@v4
 
+    - name: Install uv
+      uses: astral-sh/setup-uv@v6
+      with:
+        enable-cache: true
+
+    - name: Prepare env
+      run: uv pip install --python=python --system -r tests/requirements.txt
+
+
     - name: Configure C++11
       # LTO leads to many undefined reference like
       # `pybind11::detail::function_call::function_call(pybind11::detail::function_call&&)