fix some timezone handling and add specs

spec/validates_timeliness/conversion_spec.rb

@@ -55,6 +55,14 @@ describe ValidatesTimeliness::Conversion do
       it "should return as Time with same component values" do
         type_cast_value(DateTime.civil_from_format(:utc, 2010, 1, 1, 12, 34, 56), :datetime).should == Time.utc(2010, 1, 1, 12, 34, 56)
       end
+
+      it "should return same Time in correct zone if timezone aware" do
+        @timezone_aware = true
+        value = Time.utc(2010, 1, 1, 12, 34, 56)
+        result = type_cast_value(value, :datetime)
+        result.should == Time.zone.local(2010, 1, 1, 23, 34, 56)
+        result.zone.should == 'EST'
+      end
     end
 
     describe "ignore_usec option" do
@@ -64,6 +72,14 @@ describe ValidatesTimeliness::Conversion do
         value = Time.utc(2010, 1, 1, 12, 34, 56, 10000)
         type_cast_value(value, :datetime).should == Time.utc(2010, 1, 1, 12, 34, 56)
       end
+
+      it "should ignore usec and return time in correct zone if timezone aware" do
+        @timezone_aware = true
+        value = Time.utc(2010, 1, 1, 12, 34, 56, 10000)
+        result = type_cast_value(value, :datetime)
+        result.should == Time.zone.local(2010, 1, 1, 23, 34, 56)
+        result.zone.should == 'EST'
+      end
     end
   end
 
@@ -76,6 +92,11 @@ describe ValidatesTimeliness::Conversion do
       dummy_time(Time.utc(2000, 1, 1, 12, 34, 56)).should == Time.utc(2000, 1, 1, 12, 34, 56)
     end
 
+    it 'should return time component values shifted to current zone if timezone aware' do
+      @timezone_aware = true
+      dummy_time(Time.utc(2000, 1, 1, 12, 34, 56)).should == Time.zone.local(2000, 1, 1, 23, 34, 56)
+    end
+
     it 'should return base dummy time value for Date value' do
       dummy_time(Date.new(2010, 11, 22)).should == Time.utc(2000, 1, 1, 0, 0, 0)
     end