Added balancedBrackets to coding challenges

Author: ratracegrad

balancedBrackets/balancedBrackets.js

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+/***************************************************************
+ *                                                             *
+ *                       CodePrep.io                           *
+ *                                                             *
+ *   Function:  balancedBrackets(str)                          *
+ *   Input:    1 string parameter                              *
+ *   Output:   boolean                                         *
+ *                                                             *
+ *   Output expectations:                                      *
+ *   var myTest = balancedBrackets('({[]})');                  *
+ *   console.log(myTest);  // true                             *
+ *   var myTest = balancedBrackets('((){)}');                  *
+ *   console.log(myTest);  // false                            *
+ *                                                             *
+ *   Write the code for the balancedBrackets function that     *
+ *   accepts a string input and then returns true or           *
+ *   false if that string has balanced brackets. Brackets      *
+ *   can be (){}[]<>                                           *
+ *   An open bracket cannot exist between another set of       *
+ *   brackets that have been opened and closed. Ignore         *
+ *   any input that is not a bracket.  Return true if the      *
+ *   brackets are balanced otherwise return false.             *
+ *                                                             *
+ **************************************************************/
+
+var balancedBrackets = function(str) {
+    /* YOUR CODE GOES HERE */
+
+};

balancedBrackets/balancedBrackets.test.js

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+var should = require('should');
+var vm = require('vm');
+var fs = require('fs');
+var filename = __filename.replace(/\.test\.js$/, '.js');
+vm.runInThisContext(fs.readFileSync(filename), filename);
+
+
+describe('balancedBrackets', function() {
+    it('should exist', function(){
+        should.exist(balancedBrackets);
+    });
+
+    it('should be a function', function() {
+        balancedBrackets.should.be.a.Function;
+    });
+
+    it('should return a boolean', function() {
+        var result = balancedBrackets('hello');
+        should.exist(result);
+        result.should.be.an.instanceof(Boolean);
+    });
+
+    it('should return false if no input provided', function() {
+        var result = balancedBrackets();
+        result.should.be.eql(false);
+    });
+
+    it('should return false for a single bracket', function(){
+        var result = balancedBrackets('(');
+        result.should.be.eql(false);
+    });
+
+    it('should ignore non bracket characters', function(){
+        var result = balancedBrackets('helloWorld()');
+        result.should.be.eql(true);
+    });
+
+    it('should not allow nested brackets', function() {
+        var result = balancedBrackets('{(})');
+        result.should.be.eql(false);
+    });
+
+    it('should handle a large number of brackets', function(){
+        var result = balancedBrackets('(((((((((({{{{{}}}}}))))))))))');
+        result.should.be.eql(true);
+    });
+
+});

balancedBrackets/package.json

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+{
+  "name": "CodePrep.io_coding_challenges",
+  "author": "Jennifer Bland",
+  "url": "http://www.codeprep.io",
+  "version": "1.0.0",
+  "description": "CodePrep.io presents coding challenges you might face when interviewing for a Full-Stack Developer position",
+  "scripts": {
+    "test": "node ../node_modules/mocha/bin/mocha ./*.test.js"
+  }
+}