change how readCode is applied in typeCast generated wrapper. Fixes #1418

Author: sidorares

lib/parsers/text_parser.js

@@ -119,7 +119,8 @@ function compile(fields, options, config) {
           return _this.packet.parseGeometryValue();
         },
         readNext: function() {
-          return _this.${readCode};
+          const packet = _this.packet;
+          return ${readCode};
         }
       };`);
     }

test/integration/connection/test-typecast.js

@@ -49,18 +49,31 @@ connection.query(
   }
 );
 
+
 connection.query(
   {
     sql: 'SELECT * from json_test',
     typeCast: function(_field, next) {
-      return next();
+     return next();
     }
   },
   (err, _rows) => {
     assert.ifError(err);
-    assert.equal(_rows[0].test.test, 42);
+    assert.equal(_rows[0].json_test.test, 42);
   }
 );
 
+connection.execute(
+  {
+    sql: 'SELECT * from json_test',
+    typeCast: function(_field, next) {
+     return next();
+    }
+  },
+  (err, _rows) => {
+    assert.ifError(err);
+    assert.equal(_rows[0].json_test.test, 42);
+  }
+);
 
 connection.end();