Add pry gem for debugging support

Gemfile

@@ -2,3 +2,4 @@ source 'https://rubygems.org'
 
 gem 'rspec'
 gem 'rspec-wait'
+gem 'pry'

Gemfile.lock

@@ -1,7 +1,13 @@
 GEM
   remote: https://rubygems.org/
   specs:
+    coderay (1.1.1)
     diff-lcs (1.3)
+    method_source (0.8.2)
+    pry (0.10.4)
+      coderay (~> 1.1.0)
+      method_source (~> 0.8.1)
+      slop (~> 3.4)
     rspec (3.5.0)
       rspec-core (~> 3.5.0)
       rspec-expectations (~> 3.5.0)
@@ -17,13 +23,15 @@ GEM
     rspec-support (3.5.0)
     rspec-wait (0.0.9)
       rspec (>= 3, < 4)
+    slop (3.6.0)
 
 PLATFORMS
   ruby
 
 DEPENDENCIES
+  pry
   rspec
   rspec-wait
 
 BUNDLED WITH
-   1.12.5
+   1.13.6

spec/spec_helper.rb

@@ -1,3 +1,4 @@
+require 'pry'
 require 'rspec/wait'
 require 'terminal_session'