added useful gem functionality

lib/gem_example.rb

@@ -1,5 +1,6 @@
 require "gem_example/version"
 require "gem_example/cli/application"
+require "gem_example/useful_functionality"
 
 module GemExample
   # Your code goes here...

lib/gem_example/useful_functionality.rb

@@ -0,0 +1,7 @@
+module GemExample
+	module UsefulFunctionality
+		def self.DoSomethingUseful(string)
+			"#{string.upcase} is now useful"
+		end
+	end
+end

spec/gem_example/useful_functionality_spec.rb

@@ -0,0 +1,7 @@
+require 'spec_helper'
+
+describe GemExample::UsefulFunctionality do
+	it 'does the useful' do
+		expect(GemExample::UsefulFunctionality.DoSomethingUseful('Before')).to eq 'BEFORE is now useful'
+	end
+end

spec/gem_example_spec.rb

@@ -1,11 +1,7 @@
 require 'spec_helper'
 
 describe GemExample do
-  it 'has a version number' do
-    expect(GemExample::VERSION).not_to be nil
-  end
-
-  it 'does something useful' do
-    expect(false).to eq(true)
-  end
-end
+	it 'has a version number' do
+		expect(GemExample::VERSION).not_to be nil
+	end
+end