test quoting multibyte chars object

activerecord/test/cases/quoting_test.rb

@@ -164,6 +164,11 @@ def test_quote_string_no_column
         assert_equal "'lo\\\\l'", @quoter.quote('lo\l', nil)
       end
 
+      def test_quote_as_mb_chars_no_column
+        string = ActiveSupport::Multibyte::Chars.new('lo\l')
+        assert_equal "'lo\\\\l'", @quoter.quote(string, nil)
+      end
+
       def test_quote_string_int_column
         assert_equal "1", @quoter.quote('1', FakeColumn.new(:integer))
         assert_equal "1", @quoter.quote('1.2', FakeColumn.new(:integer))
@@ -174,6 +179,11 @@ def test_quote_string_float_column
         assert_equal "1.2", @quoter.quote('1.2', FakeColumn.new(:float))
       end
 
+      def test_quote_as_mb_chars_binary_column
+        string = ActiveSupport::Multibyte::Chars.new('lo\l')
+        assert_equal "'lo\\\\l'", @quoter.quote(string, FakeColumn.new(:binary))
+      end
+
       def test_quote_binary_without_string_to_binary
         assert_equal "'lo\\\\l'", @quoter.quote('lo\l', FakeColumn.new(:binary))
       end
@@ -186,6 +196,16 @@ def self.string_to_binary(value)
         }.new(:binary)
         assert_equal "'foo'", @quoter.quote('lo\l', col)
       end
+
+      def test_quote_as_mb_chars_binary_column_with_string_to_binary
+        col = Class.new(FakeColumn) {
+          def self.string_to_binary(value)
+            'foo'
+          end
+        }.new(:binary)
+        string = ActiveSupport::Multibyte::Chars.new('lo\l')
+        assert_equal "'foo'", @quoter.quote(string, col)
+      end
     end
   end
 end