chore: add test runner

Author: coolaj86

package.json

@@ -15,7 +15,7 @@
     "prettier": "npx -p [email protected] -- prettier -w '**/*.{js,md}'",
     "tsc": "npx -p [email protected] -- tsc -p ./jsconfig.json",
     "---------": "------------------------------------------------",
-    "test": "./node_modules/mocha/bin/mocha.js"
+    "test": "node ./tests/"
   },
   "repository": {
     "type": "git",

tests/index.js

@@ -0,0 +1,104 @@
+'use strict';
+
+let ChildProcess = require('child_process');
+let Fs = require('node:fs/promises');
+let Path = require('node:path');
+
+async function main() {
+	console.info('TAP version 13');
+
+	let dirents = await Fs.readdir(__dirname, { withFileTypes: true });
+
+	let failures = 0;
+	let count = 0;
+	for (let dirent of dirents) {
+		if (dirent.name === 'index.js') {
+			continue;
+		}
+
+		count += 1;
+		let direntPath = Path.join(__dirname, dirent.name);
+		let relPath = Path.relative('.', direntPath);
+
+		let success = await handleEach(count, relPath);
+		if (!success) {
+			failures += 1;
+		}
+	}
+
+	let passes = count - failures;
+	console.info(``);
+	console.info(`1..${count}`);
+	console.info(`# tests ${count}`);
+	console.info(`# pass  ${passes}`);
+	console.info(`# fail  ${failures}`);
+	console.info(`# skip  0`);
+
+	if (failures !== 0) {
+		process.exit(1);
+	}
+}
+
+async function handleEach(count, relPath) {
+	let success = await exec('node', [relPath])
+		.then(function (result) {
+			console.info(`ok ${count} - ${relPath}`);
+			return true;
+		})
+		.catch(function (err) {
+			console.info(`not ok ${count} - ${relPath}`);
+			if (err.code) {
+				console.info(`  # Error: ${err.code}`);
+			}
+			if (err.stderr) {
+				console.info(`  # Stderr: ${err.stderr}`);
+			}
+			return false;
+		});
+
+	return success;
+}
+
+async function exec(exe, args) {
+	return new Promise(function (resolve, reject) {
+		let cmd = ChildProcess.spawn(exe, args);
+
+		let stdout = [];
+		let stderr = [];
+
+		cmd.stdout.on('data', function (data) {
+			stdout.push(data.toString('utf8'));
+		});
+
+		cmd.stderr.on('data', function (data) {
+			stderr.push(data.toString('utf8'));
+		});
+
+		cmd.on('close', function (code) {
+			let result = {
+				code: code,
+				stdout: stdout.join(''),
+				stderr: stderr.join(''),
+			};
+
+			if (!code) {
+				resolve(result);
+				return;
+			}
+
+			let err = new Error(result.stderr);
+			Object.assign(err, result);
+			reject(err);
+		});
+	});
+}
+
+main()
+	.then(function () {
+		process.exit(0);
+	})
+	.catch(function (err) {
+		console.error('Fail:');
+		console.error(err.stack || err);
+		process.exit(1);
+	});