Extract AR::AttributeMethods#attribute_for_inspect's test code out fr…

…om base_test.rb

The method itself got extracted out from ActiveRecored::Base in commit
ceb33f8, but the test code never did.

activerecord/test/cases/attribute_methods_test.rb

@@ -27,6 +27,14 @@ def teardown
     ActiveRecord::Base.send(:attribute_method_matchers).concat(@old_matchers)
   end
 
+  def test_attribute_for_inspect
+    t = topics(:first)
+    t.title = "The First Topic Now Has A Title With\nNewlines And More Than 50 Characters"
+
+    assert_equal %("#{t.written_on.to_s(:db)}"), t.attribute_for_inspect(:written_on)
+    assert_equal '"The First Topic Now Has A Title With\nNewlines And M..."', t.attribute_for_inspect(:title)
+  end
+
   def test_attribute_present
     t = Topic.new
     t.title = "hello there!"

activerecord/test/cases/base_test.rb

@@ -1228,14 +1228,6 @@ def test_assert_queries
     assert_no_queries { assert true }
   end
 
-  def test_attribute_for_inspect
-    t = topics(:first)
-    t.title = "The First Topic Now Has A Title With\nNewlines And More Than 50 Characters"
-
-    assert_equal %("#{t.written_on.to_s(:db)}"), t.attribute_for_inspect(:written_on)
-    assert_equal '"The First Topic Now Has A Title With\nNewlines And M..."', t.attribute_for_inspect(:title)
-  end
-
   def test_becomes
     assert_kind_of Reply, topics(:first).becomes(Reply)
     assert_equal "The First Topic", topics(:first).becomes(Reply).title