ci: improve sandboxing of tests

.github/workflows/install_nvim.sh

@@ -1,8 +1,8 @@
 #!/bin/bash
+set -e
 PLUGINS="$HOME/.local/share/nvim/site/pack/plugins/start"
 mkdir -p "$PLUGINS"
 
 wget https://github.com/neovim/neovim/releases/download/${NVIM_TAG}/nvim.appimage
 chmod +x nvim.appimage
 sudo mv ./nvim.appimage /usr/bin/nvim
-git clone --depth=1 https://github.com/nvim-lua/plenary.nvim.git "$PLUGINS/plenary.nvim"

.github/workflows/tests.yml

@@ -1,15 +1,11 @@
 name: Run tests
 
-on:
-  push:
-    branches:
-      - master
-  pull_request: ~
+on: [push, pull_request]
 
 jobs:
   luacheck:
     name: Luacheck
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
     steps:
       - uses: actions/checkout@v1
 
@@ -25,7 +21,7 @@ jobs:
 
   stylua:
     name: StyLua
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
     steps:
       - uses: actions/checkout@v2
       - name: Stylua
@@ -38,10 +34,10 @@ jobs:
   run_tests:
     strategy:
       matrix:
-        nvim_tag: [v0.7.0, v0.7.2]
+        nvim_tag: [v0.7.0, v0.7.2, v0.8.0]
 
     name: Run tests
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
     env:
       NVIM_TAG: ${{ matrix.nvim_tag }}
     steps:

.gitignore

@@ -39,3 +39,4 @@ luac.out
 *.x86_64
 *.hex
 
+.testenv/

run_tests.sh

@@ -1,5 +1,22 @@
 #!/bin/bash
 set -e
 
-nvim --headless --noplugin -u tests/init.lua \
-  -c "PlenaryBustedDirectory ${1-tests} { minimal_init = './tests/init.lua' }"
+mkdir -p ".testenv/config/nvim"
+mkdir -p ".testenv/data/nvim"
+mkdir -p ".testenv/state/nvim"
+mkdir -p ".testenv/run/nvim"
+mkdir -p ".testenv/cache/nvim"
+PLUGINS=".testenv/data/nvim/site/pack/plugins/start"
+
+if [ ! -e "$PLUGINS/plenary.nvim" ]; then
+  git clone --depth=1 https://github.com/nvim-lua/plenary.nvim.git "$PLUGINS/plenary.nvim"
+fi
+
+XDG_CONFIG_HOME=".testenv/config" \
+  XDG_DATA_HOME=".testenv/data" \
+  XDG_STATE_HOME=".testenv/state" \
+  XDG_RUNTIME_DIR=".testenv/run" \
+  XDG_CACHE_HOME=".testenv/cache" \
+  nvim --headless -u tests/minimal_init.lua \
+  -c "PlenaryBustedDirectory ${1-tests} { minimal_init = './tests/minimal_init.lua' }"
+echo "Success"