time formatter

lib/formatter.rb

@@ -1,6 +1,17 @@
 require 'config'
 
 module TablePrint
+  class TimeFormatter
+    def initialize(time_format=TablePrint::Config.time_format)
+      @format = time_format
+    end
+
+    def format(value)
+      return value unless value.is_a? Time
+      value.strftime @format
+    end
+  end
+
   class NoNewlineFormatter
     def format(value)
       value.to_s.gsub(/\r\n/, "\n").gsub(/\n/, " ")

spec/formatter_spec.rb

@@ -3,12 +3,33 @@
 
 include TablePrint
 
+describe TablePrint::TimeFormatter, :focus => true do
+  describe "#format" do
+    it "only operates on Time objects" do
+      f = TablePrint::TimeFormatter.new
+      f.format(12).should == 12
+    end
+
+    it "uses the config'd time_format" do
+      f = TablePrint::TimeFormatter.new
+      time = Time.local(2012, 01, 11, 1, 23, 45)
+      f.format(time).should == "2012-01-11 01:23:45" # default time format is set in config.rb
+    end
+
+    it "overrides the config'd time format with one it was passed" do
+      f = TablePrint::TimeFormatter.new("%Y")
+      time = Time.local(2012, 01, 11, 1, 23, 45)
+      f.format(time).should == "2012" # default time format is set in config.rb
+    end
+  end
+end
+
 describe TablePrint::NoNewlineFormatter do
   before(:each) do
     @f = TablePrint::NoNewlineFormatter.new
   end
 
-  describe "#formater" do
+  describe "#format" do
     it "replaces carriage returns with spaces" do
       @f.format("foo\r\nbar").should == "foo bar"
     end