jansson/test/suites/api/test_dump.c

/*
 * Copyright (c) 2009, 2010 Petri Lehtinen <petri@digip.org>
 *
 * Jansson is free software; you can redistribute it and/or modify
 * it under the terms of the MIT license. See LICENSE for details.
 */

#include <jansson.h>
#include <string.h>
#include "util.h"

int main()
{
    json_t *json;
    char *result;

    /* Encode an empty object/array, add an item, encode again */

    json = json_object();
    result = json_dumps(json, 0);
    if(!result || strcmp(result, "{}"))
      fail("json_dumps failed");
    free(result);

    json_object_set_new(json, "foo", json_integer(5));
    result = json_dumps(json, 0);
    if(!result || strcmp(result, "{\"foo\": 5}"))
      fail("json_dumps failed");
    free(result);

    json_decref(json);

    json = json_array();
    result = json_dumps(json, 0);
    if(!result || strcmp(result, "[]"))
      fail("json_dumps failed");
    free(result);

    json_array_append_new(json, json_integer(5));
    result = json_dumps(json, 0);
    if(!result || strcmp(result, "[5]"))
      fail("json_dumps failed");
    free(result);

    json_decref(json);

    /* Construct a JSON object/array with a circular reference:

       object: {"a": {"b": {"c": <circular reference to $.a>}}}
       array: [[[<circular reference to the $[0] array>]]]

       Encode it, remove the circular reference and encode again.
    */
    json = json_object();
    json_object_set_new(json, "a", json_object());
    json_object_set_new(json_object_get(json, "a"), "b", json_object());
    json_object_set(json_object_get(json_object_get(json, "a"), "b"), "c",
                    json_object_get(json, "a"));

    if(json_dumps(json, 0))
        fail("json_dumps encoded a circular reference!");

    json_object_del(json_object_get(json_object_get(json, "a"), "b"), "c");

    result = json_dumps(json, 0);
    if(!result || strcmp(result, "{\"a\": {\"b\": {}}}"))
        fail("json_dumps failed!");
    free(result);

    json_decref(json);

    json = json_array();
    json_array_append_new(json, json_array());
    json_array_append_new(json_array_get(json, 0), json_array());
    json_array_append(json_array_get(json_array_get(json, 0), 0),
                      json_array_get(json, 0));

    if(json_dumps(json, 0))
        fail("json_dumps encoded a circular reference!");

    json_array_remove(json_array_get(json_array_get(json, 0), 0), 0);

    result = json_dumps(json, 0);
    if(!result || strcmp(result, "[[[]]]"))
        fail("json_dumps failed!");
    free(result);

    json_decref(json);

    return 0;
}