Add some string related tests

.jshintrc

@@ -39,6 +39,7 @@
     "numbersAnswers",
     "objectsAnswers",
     "recursionAnswers",
-    "regexAnswers"
+    "regexAnswers",
+    "stringsAnswers"
   ]
 }

app/strings.js

@@ -0,0 +1,13 @@
+exports = (typeof window === 'undefined') ? global : window;
+
+exports.stringsAnswers = {
+  reduceString: function(str, amount) {
+
+  },
+  wordWrap: function(str, cols) {
+
+  },
+  reverseString: function(str) {
+
+  }
+};

tests/app/strings.js

@@ -0,0 +1,51 @@
+if ( typeof window === 'undefined' ) {
+  require('../../app/strings');
+  var expect = require('chai').expect;
+}
+
+describe('strings', function() {
+  it('you should be able to reduce duplicate characters to a desired minimum', function() {
+    expect(stringsAnswers.reduceString('aaaabbbb', 2)).to.eql('aabb');
+    expect(stringsAnswers.reduceString('xaaabbbb', 2)).to.eql('xaabb');
+    expect(stringsAnswers.reduceString('aaaabbbb', 1)).to.eql('ab');
+    expect(stringsAnswers.reduceString('aaxxxaabbbb', 2)).to.eql('aaxxaabb');
+  });
+
+  it('you should be able to wrap lines at a given number of columns, without breaking words', function() {
+    var wrapCol = 5;
+    var inputStrings = [
+      'abcdef abcde abc def',
+      'abc abc abc',
+      'a b c def'
+    ];
+    var outputStrings = [
+      'abcdef\nabcde\nabc\ndef',
+      'abc\nabc\nabc',
+      'a b c\ndef'
+    ];
+    var formattedStr;
+
+    inputStrings.forEach(function(str, index) {
+      formattedStr = stringsAnswers.wordWrap(str, wrapCol);
+      expect(formattedStr).to.eql(outputStrings[index]);
+    });
+  });
+
+  it('you should be able to reverse a string', function() {
+    var inputStrings = [
+      'abc',
+      'i am a string of characters',
+      'A man, a plan, a canal: Panama'
+    ];
+    var outputStrings = [
+      'cba',
+      'sretcarahc fo gnirts a ma i',
+      'amanaP :lanac a ,nalp a ,nam A'
+    ];
+
+    inputStrings.forEach(function(str, index) {
+      var result = stringsAnswers.reverseString(str);
+      expect(result).to.eql(outputStrings[index]);
+    });
+  });
+});

tests/runner.html

@@ -52,6 +52,8 @@
   <script src="/app/recursion.js"></script>
   <script src="/tests/app/regex.js"></script>
   <script src="/app/regex.js"></script>
+  <script src="/tests/app/strings.js"></script>
+  <script src="/app/strings.js"></script>
 
   <!-- livereload snippet -->
   <script src="http://localhost:35729/livereload.js"></script>