add leapYears

README.md

@@ -12,11 +12,11 @@ The first exercise, `helloWorld` will walk you through the process in more depth
 
 
 ## planned exercises (in no particular order for the moment):
-1. book titles
+1. book titles (MC)
 1. leap years 
 1. Caesar Cipher
 1. Palindromes
 1. Pangrams
-1. pig latin
+1. pig latin (MC)
 1. fibonacci 
 1. convert to snake case

leapYears/README.md

@@ -0,0 +1,11 @@
+# Exercise XX - leapYears
+
+Create a function that determines whether or not a given year is a leap year.  Leap years are determined by the following rules:
+
+>There is a leap year every year whose number is perfectly divisible by four - except for years which are both divisible by 100 and not divisible by 400. The second part of the rule effects century years. For example; the century years 1600 and 2000 are leap years, but the century years 1700, 1800, and 1900 are not.
+
+```javascript
+leapYears(2000) // is a leap year: returns true
+leapYears(1985) // is not a leap year: returns false
+```
+

leapYears/leapYears.js

@@ -0,0 +1,5 @@
+var leapYears = function() {
+
+}
+
+module.exports = leapYears

leapYears/leapYears.spec.js

@@ -0,0 +1,22 @@
+var leapYears = require('./leapYears')
+
+describe('leapYears', function() {
+  it('works with non century years', function() {
+    expect(leapYears(1994)).toEqual(true);
+  });
+  xit('works with non century years', function() {
+    expect(leapYears(1997)).toEqual(false);
+  });
+  xit('works with ridiculously futuristic non century years', function() {
+    expect(leapYears(34992)).toEqual(true);
+  });
+  xit('works with century years', function() {
+    expect(leapYears(1900)).toEqual(false);
+  });
+  xit('works with century years', function() {
+    expect(leapYears(1400)).toEqual(true);
+  });
+  xit('works with century years', function() {
+    expect(leapYears(700)).toEqual(false);
+  });
+});