unit-test.js

function _object_equals(object_1, object_2) {
	const keys = new Set([
		...Object.keys(object_1),
		...Object.keys(object_2)
	]);

	for (const key of keys) {
		// if one is instance of object, check if both are
		if (object_2[key] instanceof Object || object_1[key] instanceof Object) {
			if (object_2[key] instanceof Object && object_1[key] instanceof Object) {
				const subcheck = _object_equals(object_1[key], object_2[key]);

				if (!subcheck) {
					return (false);
				}

				continue;
			}

			return (false);
		}

		if (object_2[key] !== object_1[key]) {
			return (false);
		}
	}

	return (true);
}

/**
 * @param {object containing input and output} test_cases
 * @param {function to be tested} test_function
 *
 */
function run_tests(test_cases, test_function) {
	let passed = true;
	for (const each_test of test_cases) {

		const input = JSON.parse(JSON.stringify(each_test['input']));
		const result = test_function(...each_test['input']);
		const expected = each_test['output'];

		if (typeof result !== typeof expected) {
			passed = false;
			console.log(`FAILED test for ${JSON.stringify(input)}, expected ${JSON.stringify(expected)} got ${JSON.stringify(result)}`);
			continue;
		}
		/**
		 * if result is not an object, use the direct equality operator
		 * else use our _object_equals method
		 */
		if (typeof result !== 'object') {
			if (result !== expected) {
				passed = false;
				console.log(`FAILED test for ${JSON.stringify(input)}, expected ${JSON.stringify(expected)} got ${JSON.stringify(result)}`);
			}
		} else if (_object_equals(result, expected) === false) {
			passed = false;
			console.log(`FAILED test for ${JSON.stringify(input)}, expected ${JSON.stringify(expected)} got ${JSON.stringify(result)}`);
		}
	}
	if (passed === true) {
		console.log('Tests passed');
	}
}

module.exports = {
  run_tests
};

/**
 * Sample Usage:
 *
 * const tests = [
 * 	{ input: 'sakhfkg', output: false },
 * 	{ input: 'abhvb', output: false },
 * 	{ input: 'ssaf', output: false },
 * ];
 * 
 * run_tests(tests, functionNameToTest);
 */