FEAT: add a basic regression test

.github/workflows/ci.yml

@@ -0,0 +1,49 @@
+name: Tests
+
+on: [push, pull_request]
+
+jobs:
+  unit_tests:
+    name: unit tests
+    runs-on: ${{ matrix.os }}
+    timeout-minutes: 30
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - os: ubuntu-20.04
+            url: https://github.com/neovim/neovim/releases/download/nightly/nvim-linux64.tar.gz
+            manager: sudo apt-get
+            #packages: -y fd-find mlocate
+          - os: ubuntu-20.04
+            url: https://github.com/neovim/neovim/releases/download/v0.7.0/nvim-linux64.tar.gz
+            manager: sudo apt-get
+            #packages: -y fd-find mlocate
+    steps:
+      - uses: actions/checkout@v2
+      - run: date +%F > todays-date
+      - name: Restore from todays cache
+        uses: actions/cache@v2
+        with:
+          path: _neovim
+          key: ${{ runner.os }}-${{ matrix.url }}-${{ hashFiles('todays-date') }}
+
+      - name: Prepare
+        run: |
+          ${{ matrix.manager }} update
+          ${{ matrix.manager }} install ${{ matrix.packages }}
+          test -d _neovim || {
+            mkdir -p _neovim
+            curl -sL ${{ matrix.url }} | tar xzf - --strip-components=1 -C "${PWD}/_neovim"
+          }
+          mkdir -p ~/.local/share/nvim/site/pack/vendor/start
+          git clone --depth 1 https://github.com/nvim-lua/plenary.nvim ~/.local/share/nvim/site/pack/vendor/start/plenary.nvim
+          git clone --depth 1 https://github.com/nvim-telescope/telescope.nvim ~/.local/share/nvim/site/pack/vendor/start/telescope.nvim
+          git clone --depth 1 https://github.com/L3MON4D3/LuaSnip.nvim ~/.local/share/nvim/site/pack/vendor/start/LuaSnip.nvim
+          ln -s $(pwd) ~/.local/share/nvim/site/pack/vendor/start
+
+      - name: Run tests
+        run: |
+          export PATH="${PWD}/_neovim/bin:${PATH}"
+          nvim --version
+          make test_ci

Makefile

@@ -1,10 +1,13 @@
-.PHONY: lint stylua
+.PHONY: test_ci, lint stylua
 
+all: test_ci lint
+
+test_ci:
+	@nvim --headless -c "PlenaryBustedDirectory lua/tests/ {}"
 
 lint:
-	luacheck lua/telescope
+	@luacheck lua/telescope
 
 stylua:
-	stylua --color always lua/
-
+	@stylua --color always lua/
 

lua/tests/automated/telescope_basics_spec.lua

@@ -0,0 +1,5 @@
+describe('sanity check tests: ', function()
+  it('Telescope builtin', function()
+    vim.cmd [[Telescope builtin]]
+  end)
+end)

lua/tests/automated/telescope_invoke_snippets_previewer.lua

@@ -0,0 +1,5 @@
+describe('plugin smoke tests: ', function()
+  it('Telescope luasnip', function()
+    vim.cmd [[Telescope luasnip]]
+  end)
+end)