From e5d799689565370b6fa9854205afd9c34e66d857 Mon Sep 17 00:00:00 2001
From: Caley Woods <caley.w@gmail.com>
Date: Tue, 12 Apr 2011 08:37:24 -0500
Subject: [PATCH] Added 5 tests to show operators. Includes modulus

---
 jskoans.htm               |  1 +
 topics/about_operators.js | 50 +++++++++++++++++++++++++++++++++++++++
 2 files changed, 51 insertions(+)
 create mode 100644 topics/about_operators.js

diff --git a/jskoans.htm b/jskoans.htm
index 43296404..1700e095 100644
--- a/jskoans.htm
+++ b/jskoans.htm
@@ -7,6 +7,7 @@
   <script type="text/javascript" src="support/qunit.js"></script>
   <script type="text/javascript" src="support/koans.js"></script>
   <script type="text/javascript" src="topics/about_asserts.js"></script>
+  <script type="text/javascript" src="topics/about_operators.js"></script>
   <script type="text/javascript" src="topics/about_equality.js"></script>
   <script type="text/javascript" src="topics/about_truthyness.js"></script>
   <script type="text/javascript" src="topics/about_assignment.js"></script>
diff --git a/topics/about_operators.js b/topics/about_operators.js
new file mode 100644
index 00000000..4113d7cc
--- /dev/null
+++ b/topics/about_operators.js
@@ -0,0 +1,50 @@
+$(document).ready(function(){
+
+	module("About Operators (topics/about_operators.js)");
+
+  test("addition", function() {
+    var result = 0;
+    //starting i at 0, add i to result and increment i by 1 until i is equal to 5
+    for (var i = 0; i <= 5; i++) {
+      result = result + i;
+    }
+    equals(result, __, "What is the value of result?");
+  });
+
+  test("assignment addition", function() {
+    var result = 0;
+    for (var i = 0; i <=5; i++) {
+      //the code below is just like saying result = result + i; but is more concise
+      result += i;
+    }
+    equals(result, __, "What is the value of result?");
+  });
+
+  test("subtraction", function() {
+    var result = 5;
+    for (var i = 0; i <= 2; i++) {
+      result = result - i;
+    }
+    equals(result, __, "What is the value of result?");
+  });
+
+  test("assignment subtraction", function() {
+    var result = 5;
+    for (var i = 0; i <= 2; i++) {
+      result -= i;
+    }
+    equals(result, __, "What is the value of result?");
+  });
+
+  //Assignment operators are available for multiplication and division as well
+  //let's do one more, the modulo operator, used for showing division remainder
+
+  test("modulus", function() {
+    var result = 10;
+    var x = 5;
+    //again this is exactly the same as result = result % x
+    result %= x;
+    equals(result, __, "What is the value of result?");
+  });
+
+});