Implement Data#inspect and Data#to_s

This really helps with debugging some code.

src/data.rb

@@ -34,6 +34,11 @@ def self.define(*members, &block)
         end
       end
 
+      define_method(:inspect) do
+        "#<data #{self.class}#{members.map { |member| " #{member}=#{public_send(member).inspect}" }.join(',')}>"
+      end
+      alias_method :to_s, :inspect
+
       define_method(:to_h) { members.to_h { |member| [member, public_send(member)] } }
 
       define_method(:with) do |**kwargs|

test/natalie/data_test.rb

@@ -6,6 +6,14 @@
     it 'transforms the data object into a hash' do
       1.should == 1
     end
+
+    it 'results in a readable representation' do
+      1.should == 1
+    end
+
+    it 'results in a readable representation' do
+      1.should == 1
+    end
   end
 end
 
@@ -16,4 +24,18 @@
       data.to_h.should == { amount: 42, unit: 'km' }
     end
   end
+
+  describe 'Data#inspect' do
+    it 'results in a readable representation' do
+      data = DataSpecs::Measure.new(amount: 42, unit: 'km')
+      data.inspect.should == '#<data DataSpecs::Measure amount=42, unit="km">'
+    end
+  end
+
+  describe 'Data#to_s' do
+    it 'results in a readable representation' do
+      data = DataSpecs::Measure.new(amount: 42, unit: 'km')
+      data.to_s.should == '#<data DataSpecs::Measure amount=42, unit="km">'
+    end
+  end
 end