From 5c78dc7ebebadaf93fbf1b8da69c6b134669ed0c Mon Sep 17 00:00:00 2001
From: Jakub Broz <jakub4broz@gmail.com>
Date: Mon, 1 Jan 2018 15:56:20 +0100
Subject: [PATCH] zero factorial is 1

---
 calculator/calculator.spec.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/calculator/calculator.spec.js b/calculator/calculator.spec.js
index 29b90af..a8b5564 100644
--- a/calculator/calculator.spec.js
+++ b/calculator/calculator.spec.js
@@ -56,7 +56,7 @@ describe('power', function() {
 
 describe('factorial', function() {
 	it('computes the factorial of 0', function() {
-		expect(calculator.factorial(0)).toEqual(0);
+		expect(calculator.factorial(0)).toEqual(1); // 0! = 1
 	});
 
 	it('computes the factorial of 1', function() {
@@ -74,4 +74,4 @@ describe('factorial', function() {
 	it('computes the factorial of 10', function() {
 		expect(calculator.factorial(10)).toEqual(3628800);
 	});
-});
\ No newline at end of file
+});