Replace use of $stdin.gets with UI.gets

lib/cocoapods/command/spec.rb

@@ -302,7 +302,7 @@ module Pod
 
         UI.puts message
 
-        index = $stdin.gets.chomp.to_i - 1
+        index = UI.gets.chomp.to_i - 1
         if index < 0 || index > array.count - 1
           raise Informative, "#{ index + 1 } is invalid [1-#{ array.count }]"
         else

lib/cocoapods/user_interface.rb

@@ -240,6 +240,12 @@ module Pod
         STDOUT.print(message) unless config.silent?
       end
 
+      # gets input from $stdin
+      #
+      def gets
+        $stdin.gets
+      end
+
       # Stores important warning to the user optionally followed by actions
       # that the user should take. To print them use {#print_warnings}.
       #

spec/functional/command/spec_spec.rb

@@ -212,10 +212,9 @@ module Pod
       end
 
       it "cats the first podspec from all podspecs" do
-        $stdin = StringIO.new("1\n", 'r')
+        UI.next_input = "1\n"
         run_command('spec', 'cat', '--show-all', 'AFNetworking')
         UI.output.should.include fixture('spec-repos/master/AFNetworking/1.2.0/AFNetworking.podspec').read
-        $stdin = STDIN
       end
     end
 
@@ -248,19 +247,17 @@ module Pod
       describe "#choose_from_array" do
 
         it "should return a valid index for the given array" do
-          $stdin = StringIO.new("1\n", 'r')
+          UI.next_input = "1\n"
           index = @sut.send(:choose_from_array, ['item1', 'item2', 'item3'], 'A message')
           UI.output.should.include "1: item1\n2: item2\n3: item3\nA message\n"
           index.should == 0
-          $stdin = STDIN
         end
 
         it "should raise when the index is out of bounds" do
-          $stdin = StringIO.new("4\n", 'r')
+          UI.next_input = "4\n"
           lambda { @sut.send(:choose_from_array, ['item1', 'item2', 'item3'], 'A message') }.should.raise Pod::Informative
-          $stdin = StringIO.new("0\n", 'r')
+          UI.next_input = "0\n"
           lambda { @sut.send(:choose_from_array, ['item1', 'item2', 'item3'], 'A message') }.should.raise Pod::Informative
-          $stdin = STDIN
         end
 
       end

spec/spec_helper/user_interface.rb

@@ -9,10 +9,12 @@ module Pod
   module UI
     @output = ''
     @warnings = ''
+    @next_input = ''
 
     class << self
       attr_accessor :output
       attr_accessor :warnings
+      attr_accessor :next_input
 
       def puts(message = '')
         @output << "#{message}\n"
@@ -25,6 +27,10 @@ module Pod
       def print(message)
         @output << message
       end
+
+      def gets
+        @next_input
+      end
     end
   end
 end