Oops, json_conv test cases are missed.

Author: umitanuki

expected/json_conv.out

@@ -0,0 +1,20 @@
+CREATE FUNCTION conv(o json) RETURNS json AS $$
+if (o instanceof Array) {
+	o[1] = 10;
+} else if (typeof(o) == 'object') {
+	o.i = 10;
+}
+return o;
+$$ LANGUAGE plv8;
+SELECT conv('{"i": 3, "b": 20}');
+      conv       
+-----------------
+ {"i":10,"b":20}
+(1 row)
+
+SELECT conv('[1, 2, 3]');
+   conv   
+----------
+ [1,10,3]
+(1 row)
+

sql/json_conv.sql

@@ -0,0 +1,11 @@
+CREATE FUNCTION conv(o json) RETURNS json AS $$
+if (o instanceof Array) {
+	o[1] = 10;
+} else if (typeof(o) == 'object') {
+	o.i = 10;
+}
+return o;
+$$ LANGUAGE plv8;
+
+SELECT conv('{"i": 3, "b": 20}');
+SELECT conv('[1, 2, 3]');