Initial test setup

Author: nojaf

.github/workflows/ci.yml

@@ -19,7 +19,7 @@ jobs:
       - name: Setup Node.js
         uses: actions/setup-node@v4
         with:
-          node-version: '22'
+          node-version: "22"
 
       - name: Install dependencies
         run: npm ci
@@ -32,6 +32,9 @@ jobs:
         working-directory: ./tools/TypeScript-DOM-lib-generator
         run: npm run build
 
+      - name: Run tests
+        run: npm test
+
       - name: get-npm-version
         id: package-version
         uses: martinbeentjes/[email protected]
@@ -50,7 +53,7 @@ jobs:
         uses: actions/upload-artifact@v4
         with:
           name: npm-package
-          path: '*.tgz'
+          path: "*.tgz"
 
       - name: Publish to npm
         if: false

package-lock.json

@@ -25,8 +25,10 @@
     "rescript.json",
     "src/**/*.res"
   ],
+  "type": "module",
   "scripts": {
-    "test": "echo \"Error: no test specified\" && exit 1"
+    "test": "node tests/index.js",
+    "build": "rewatch"
   },
   "license": "MIT",
   "dependencies": {

package.json

@@ -5,6 +5,10 @@
     {
       "dir": "src",
       "subdirs": true
+    },
+    {
+      "dir": "tests",
+      "subdirs": true
     }
   ],
   "package-specs": {

rescript.json

@@ -0,0 +1,31 @@
+import { execSync } from "child_process";
+import { fileURLToPath } from "url";
+import * as path from "path";
+import { exit } from "process";
+
+const currentFileName = fileURLToPath(import.meta.url);
+const currentDir = path.dirname(currentFileName);
+const repoRoot = path.resolve(currentDir, "..");
+const testsDir = path.join(repoRoot, "tests");
+
+// Compile all tests
+execSync("npx rewatch", { cwd: repoRoot, stdio: "inherit" });
+
+const successGreen = "\x1b[32m";
+const warningYellow = "\x1b[33m";
+const resetColor = "\x1b[0m";
+
+// Assert nothing changed
+const gitDff = execSync("git ls-files --modified .", {
+  cwd: testsDir,
+}).toString();
+if (!gitDff) {
+  console.log(`${successGreen}✅ No unstaged tests difference!${resetColor}`);
+  exit(0);
+} else {
+  console.log(
+    `${warningYellow}⚠️ There are unstaged differences in tests! Did you break a test?\n${gitDff}${resetColor}`,
+  );
+  execSync("git --no-pager diff .", { stdio: "inherit" });
+  exit(1);
+}