add author, publisher and publishing year to book.

2 files changed, 5 insertions, 2 deletions

diff --git a/lib/book.rb b/lib/book.rb
index 56f9c5a..a883e49 100644
--- a/lib/book.rb
+++ b/lib/book.rb
@@ -1,8 +1,11 @@
 class Book
   attr_reader :title
-  def initialize(title)
+  def initialize(title, author, publisher, year_published)
     @title=title
   end
+  def is_titled?(title)
+    @title == title
+  end
   def ==(other)
     other.kind_of?( Book ) && @title == other.title
   end
diff --git a/lib/library.rb b/lib/library.rb
index 494d46f..4f1321a 100644
--- a/lib/library.rb
+++ b/lib/library.rb
@@ -6,6 +6,6 @@ class Library
     @books << book
   end
   def contains(title)
-    @books.find { |book| book.title == title } != nil
+    @books.find { |book| book.is_titled?(title) } != nil
   end
 end