[error-handling] Now catches errors thrown in expect callback

gunner/index.js

@@ -3,7 +3,7 @@ const { log } = console;
 const _runTests = require('./lib/runTests');
 const _expect = require('./lib/expect');
 
-const { stringify } = require('../util/helpers');
+const { stringify, hasProp } = require('../util/helpers');
 
 class Gunner {
 
@@ -14,32 +14,39 @@ class Gunner {
 	test (description, test) {
 		this.tests.push({
 			description,
-			test: () => test(_expect),
+			test: () => {
+				try {
+					return test(_expect);
+				} catch (e) {
+					// If errors are thrown, reject them
+					return Promise.reject(e);
+				}
+			},
 		});
 	}
 
 	run (options = {}) {
-		process.stdout.write(`Running ${this.tests.length} tests...`);
+		const shouldLog = (hasProp(options)('log') && options.log) || !(hasProp(options)('log'));
+		if (shouldLog) process.stdout.write(`Running ${this.tests.length} tests...`);
 		return _runTests(this.tests)
 		.then(results => {
+			if (shouldLog) {
 				process.stdout.clearLine();
 				process.stdout.cursorTo(0);
 				const success = results.filter(r => r.result === 'pass');
 				const successPercent = Math.floor(success.length/results.length * 100);
-
-			if (('log' in options && options.log) || !('log' in options)) {
 				log(
 					`\n${success.length} tests passed of ${results.length}`,
 					`[${successPercent}% success]\n`
 				);
 				results.forEach(r => {
+					const trace = (options.trace && r.error)
+						? `\n    Traceback:\n    ${stringify(r.error)}`
+						: '';
+
 					log(`${r.result === 'pass' ? '✅' : '❌'} ::`,
 						`${r.description}`,
-						`${options.stack ?
-							r.error
-								? `\n    Traceback:\n    ${stringify(r.error)}`
-								: ''
-							: ''}`);
+						`${trace}`);
 				});
 			}
 

gunner/lib/expect.js

@@ -14,7 +14,7 @@ const expectPromise = (pred, statement, options = {}) => a => (...b) => {
 				)
 			)
 			.catch(e =>
-				(options.shouldNotCatch)
+				options.shouldNotCatch
 					? _assertPromise(
 						pred(a, ...b),
 						statement(e, ...b)
@@ -29,43 +29,43 @@ const expectPromise = (pred, statement, options = {}) => a => (...b) => {
 	);
 };
 
-const expect = a => {
+const expect = thing => {
 
 	return ({
 		done : () => Promise.resolve(),
 		equal : expectPromise(
 			(a, b) => a === b,
 			(a, b) => `${a} is not equal to ${b}`,
-		)(a),
+		)(thing),
 		deepEqual : expectPromise(
 			(a, b) => isEq(a, b),
 			(a, b) => `${stringify(a)} is not deeply equal to ${stringify(b)}`,
-		)(a),
+		)(thing),
 		isTrue : expectPromise(
 			a => a === true,
 			a => `${a} is not true`,
-		)(a),
+		)(thing),
 		hasProp : expectPromise(
 			(a, b) => b in a,
 			(a, b) => `Property ${b} does not exist in ${stringify(a)}`,
-		)(a),
+		)(thing),
 		hasPair : expectPromise(
 			(a, b, c) => a[b] === c,
 			(a, b, c) => `Pair <${b}, ${c}> does not exist in ${stringify(a)}`,
-		)(a),
+		)(thing),
 		resolvesTo : expectPromise(
 			(a, b) => (a && typeof a.then === 'function')
 				? a.then(x => x === b ? Promise.resolve() : Promise.reject())
 				: Promise.reject(`${a} was not a Promise`),
 			(a, b) => `${a} does not resolve to ${b}`,
-		)(a),
+		)(thing),
 		isPromise : expectPromise(
 			a => (a && typeof a.then === 'function')
 				? a.then(() => Promise.resolve()).catch(() => Promise.resolve())
 				: Promise.reject(),
 			a => `${a} is not a Promise`,
 			{ shouldNotCatch: true },
-		)(a),
+		)(thing),
 	});
 
 };

sample.test.js

@@ -8,6 +8,38 @@ gunner.test(`objects aren't deeply equal`, expect => expect({a : 1}).deepEqual({
 
 const a = 1;
 gunner.test('expression should be true', expect => expect(a === 1).isTrue());
-gunner.test('promise must reject', expect => expect(Promise.reject(new Error('no'))).equal('rejection'));
+gunner.test('promise must reject', expect =>
+	expect(Promise.reject(new Error('Promise Rejected'))).equal('no rejection'));
 
-gunner.run();
+gunner.test('multiple expect', expect => {
+
+	const a = { };
+	a.b = 1;
+	a.c = 2;
+
+	return [
+		expect(a).hasProp('b'),
+		expect(a).hasPair('c', 3),
+	];
+
+});
+
+const flamethrower = require('./throwingFunc');
+
+gunner.test('should catch error', expect => {
+	return expect(flamethrower()).equal(5);
+});
+
+gunner.test('should be a Promise (resolved)', expect =>
+	expect(Promise.resolve()).isPromise());
+
+gunner.test('should be a Promise (rejected)', expect =>
+	expect(Promise.reject()).isPromise());
+
+gunner.test('should resolve to 5', expect =>
+	expect(Promise.resolve(5)).resolvesTo(5));
+
+gunner.test('should not resolve to 5', expect =>
+	expect(Promise.resolve()).resolvesTo(5));
+
+gunner.run({ trace: false });