update marshal tests

Author: kares

test/db/postgresql/types_test.rb

@@ -701,7 +701,7 @@ def test_timestamp_with_zone_values_without_rails_time_zone_support
     @connection.reconnect!
   end if ar_version('3.0')
 
-  def test_marshaling
+  def test_marshal_types
     Marshal.dump @first_array
     Marshal.dump @first_bit_string
     Marshal.dump @first_tsvector

test/simple.rb

@@ -1264,11 +1264,30 @@ def test_query_cache
     end
   end
 
-  def test_marshaling
-    Marshal.dump DbType.new
-    db_type = DbType.create!
-    Marshal.dump db_type
-    Marshal.dump db_type.reload
+  def test_marshal
+    expected = DbType.create!(
+      :sample_string => 'a string',
+      :sample_text => '1234' * 100,
+      :sample_integer => 42,
+      :sample_float => 10.5,
+      :sample_boolean => true,
+      :sample_decimal => 0.12345678,
+      :sample_time => Time.now,
+      :sample_binary => '01' * 512
+    )
+    expected.reload
+
+    marshalled = Marshal.dump(expected)
+    actual = Marshal.load(marshalled)
+
+    assert_equal expected.attributes, actual.attributes
+  end
+
+  def test_marshal_new
+    marshalled = Marshal.dump(DbType.new)
+    actual = Marshal.load(marshalled)
+
+    assert actual.new_record?, "should be a new record"
   end
 
   protected