Added 0 and 0.0 to the list of things that are considered blank and w…

…rote specs to verify.

lib/core_extensions.rb

@@ -1,20 +1,20 @@
-module CoreExtensions
-  class Object
-    # An object is blank if it's nil, empty, or a whitespace string.
-    # For example, "", "   ", nil, [], and {} are blank.
-    #
-    # This simplifies
-    #   if !address.nil? && !address.empty?
-    # to
-    #   if !address.blank?
-    def blank?
-      if respond_to?(:empty?) && respond_to?(:strip)
-        empty? or strip.empty?
-      elsif respond_to?(:empty?)
-        empty?
-      else
-        !self
-      end
+class Object
+  # An object is blank if it's nil, empty, or a whitespace string.
+  # For example, "", "   ", nil, [], 0, 0.0 and {} are blank.
+  #
+  # This simplifies
+  #   if !address.nil? && !address.empty?
+  # to
+  #   if !address.blank?
+  def blank?
+    if respond_to?(:empty?) && respond_to?(:strip)
+      empty? or strip.empty?
+    elsif respond_to?(:empty?)
+      empty?
+    elsif respond_to?(:zero?)
+      zero?
+    else
+      !self
     end
   end
 end

lib/flat_file.rb

@@ -102,8 +102,7 @@
 #
 # add_field also adds to a variable that olds a pack format.  This is
 # how the records parsed and assembeled.
-require 'core_extensions'
-include CoreExtensions
+require File.dirname(__FILE__) + "/../lib/core_extensions"
 class FlatFile
 
     class FlatFileException < Exception; end

spec/core_extensions_spec.rb

@@ -0,0 +1,32 @@
+require File.dirname(__FILE__) + "/../lib/core_extensions"
+require 'spec'
+
+describe Object, "blank?" do
+  it "should return true for 0" do
+    0.should be_blank
+  end
+
+  it "should return true for 0.0" do
+    0.0.should be_blank
+  end
+
+  it "should return false for 1" do
+    1.should_not be_blank
+  end
+
+  it "should return true for ''" do
+    ''.should be_blank
+  end
+
+  it "should return false for 'moo'" do
+    'moo'.should_not be_blank
+  end
+
+  it "should return true for nil" do
+    nil.should be_blank
+  end
+
+  it "should return true for '  '" do
+    '  '.should be_blank
+  end  
+end

spec/flat_filer_spec.rb

@@ -1,8 +1,6 @@
-
 require File.dirname(__FILE__) + "/../lib/flat_file"
 require 'spec'
 
-
 class PersonFile < FlatFile
     add_field :f_name, :width => 10