From 5bbbc93d808a23299e6da9a651730c1058c96f5c Mon Sep 17 00:00:00 2001
From: Juan Cruz Viotti <juanchiviotti@gmail.com>
Date: Thu, 20 Nov 2014 13:53:10 -0400
Subject: [PATCH] Implement helpers module with formatLongString()

---
 lib/helpers/helpers.coffee      |  5 +++++
 lib/helpers/helpers.spec.coffee | 35 +++++++++++++++++++++++++++++++++
 2 files changed, 40 insertions(+)
 create mode 100644 lib/helpers/helpers.coffee
 create mode 100644 lib/helpers/helpers.spec.coffee

diff --git a/lib/helpers/helpers.coffee b/lib/helpers/helpers.coffee
new file mode 100644
index 00000000..decab1eb
--- /dev/null
+++ b/lib/helpers/helpers.coffee
@@ -0,0 +1,5 @@
+exports.formatLongString = (string, n) ->
+	return string if not n?
+	splitRegexp = new RegExp(".{1,#{n}}", 'g')
+	splittedString = string.match(splitRegexp)
+	return splittedString.join('\n')
diff --git a/lib/helpers/helpers.spec.coffee b/lib/helpers/helpers.spec.coffee
new file mode 100644
index 00000000..eea6a729
--- /dev/null
+++ b/lib/helpers/helpers.spec.coffee
@@ -0,0 +1,35 @@
+expect = require('chai').expect
+_ = require('lodash')
+helpers = require('./helpers')
+
+STRING =
+	numbers: '1234567812345678'
+
+describe 'Helpers:', ->
+
+	describe '#formatLongString()', ->
+
+		it 'should format a string', ->
+			result = helpers.formatLongString(STRING.numbers, 4)
+			expect(result).to.equal('1234\n5678\n1234\n5678')
+
+		it 'should return the same string if n is null/undefined', ->
+			for value in [ undefined, null ]
+				result = helpers.formatLongString(STRING.numbers, value)
+				expect(result).to.equal(STRING.numbers)
+
+		it 'should throw an error if input is not a string', ->
+			for value in [
+				undefined
+				null
+				[]
+				{}
+				123
+			]
+				fn = _.partial(helpers.formatLongString, value, 4)
+				expect(fn).to.throw
+
+		it 'should return the same string if n > string.length', ->
+			stringLength = STRING.numbers.length
+			result = helpers.formatLongString(STRING.numbers, stringLength + 1)
+			expect(result).to.equal(STRING.numbers)