Add unit tests for Themery

.github/workflows/ci.yml

@@ -0,0 +1,28 @@
+name: Run Lua Tests
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        lua-version: ['5.3']
+    steps:
+      - uses: actions/checkout@v2
+      - name: Setup Lua
+        uses: leafo/gh-actions-lua@v8
+        with:
+          lua-version: ${{ matrix.lua-version }}
+      - name: Install Luarocks
+        uses: leafo/gh-actions-luarocks@v2
+      - name: Install dependencies
+        run: luarocks install busted
+      - name: Run tests
+        run: busted ./tests/

.luarc.json

@@ -1,3 +1,6 @@
 {
-  "diagnostics.globals": ["vim"]
+  "diagnostics.globals": ["vim"],
+  "linter": "luacheck",
+  "test_framework": "busted",
+  "test_runner": "busted"
 }

development.md

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+# Development Practices for Themery.nvim
+
+This document outlines the development practices, including testing, for the Themery.nvim project.
+
+## Running Unit Tests
+
+To ensure the quality and functionality of Themery.nvim, unit tests have been implemented. These tests are located in the `tests/` directory of the repository.
+
+To run the unit tests, you will need to have a Lua testing framework installed, such as Busted or Luassert. Once you have a testing framework installed, you can run the tests by executing the following command from the root of the repository:
+
+```bash
+busted ./tests/
+```
+
+This command will run all the tests found in the `tests/` directory and output the results. It's recommended to run the tests before pushing changes to ensure that your contributions do not introduce regressions or break existing functionality.

tests/init_spec.lua

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+local themery = require("themery")
+local mock = require("luassert.mock")
+local stub = require("luassert.stub")
+
+describe("Themery module", function()
+  before_each(function()
+    -- Mocking necessary Neovim API calls and other module dependencies
+    mock(vim.api, true)
+    stub(themery, "setup")
+    stub(themery, "closeAndRevert")
+    stub(themery, "closeAndSave")
+    stub(themery, "updateView")
+  end)
+
+  after_each(function()
+    mock.revert(vim.api)
+    themery.setup:revert()
+    themery.closeAndRevert:revert()
+    themery.closeAndSave:revert()
+    themery.updateView:revert()
+  end)
+
+  describe("setup function", function()
+    it("should configure themery with default settings", function()
+      themery.setup()
+      assert.stub(themery.setup).was_called_with()
+    end)
+  end)
+
+  describe("closeAndRevert function", function()
+    it("should revert to the previous theme", function()
+      themery.closeAndRevert()
+      assert.stub(themery.closeAndRevert).was_called()
+    end)
+  end)
+
+  describe("closeAndSave function", function()
+    it("should save the current theme and close the themery window", function()
+      themery.closeAndSave()
+      assert.stub(themery.closeAndSave).was_called()
+    end)
+  end)
+
+  describe("updateView function", function()
+    it("should update the themery window view based on user interaction", function()
+      themery.updateView(1)
+      assert.stub(themery.updateView).was_called_with(1)
+    end)
+  end)
+end)