Add CI and test coverage

.eslintrc.json

@@ -0,0 +1,12 @@
+{
+	"root": true,
+	"parser": "@typescript-eslint/parser",
+	"parserOptions": { "ecmaVersion": 2020, "sourceType": "module" },
+	"plugins": ["@typescript-eslint"],
+	"rules": {
+		"curly": "warn",
+		"eqeqeq": "warn",
+		"no-throw-literal": "warn"
+	},
+	"ignorePatterns": ["out", "**/*.d.ts"]
+}

.github/workflows/ci.yml

@@ -0,0 +1,26 @@
+name: CI
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
+        with:
+          node-version: lts/*
+          cache: npm
+      - run: npm ci
+      # pretest compiles and lints; VS Code needs a display on Linux
+      - run: xvfb-run -a npm run test:coverage
+      - name: Enforce coverage threshold
+        run: node -e "const p=require('./coverage/coverage-summary.json').total.lines.pct; console.log('lines:', p + '%'); if (p < 85) process.exit(1)"
+      - uses: actions/upload-artifact@v4
+        if: always()
+        with:
+          name: coverage
+          path: coverage/

.gitignore

@@ -1,3 +1,5 @@
 *.vsix
 .DS_Store
 node_modules/
+.vscode-test/
+coverage/

.vscode-test.mjs

@@ -0,0 +1,14 @@
+import { defineConfig } from '@vscode/test-cli';
+
+export default defineConfig({
+	tests: [{
+		files: 'out/test/**/*.test.js',
+		workspaceFolder: '.',
+		launchArgs: ['--disable-extensions'],
+		mocha: { ui: 'tdd', timeout: 20000 },
+	}],
+	coverage: {
+		exclude: ['**/test/**'],
+		reporter: ['text', 'lcov', 'json-summary'],
+	},
+});

.vscodeignore

@@ -0,0 +1,2 @@
+.vscode-test/**
+coverage/**