tests/utests/data/test_new.c

/**
 * @file test_new.c
 * @author: Michal Vasko <mvasko@cesnet.cz>
 * @brief unit tests for functions for creating data
 *
 * Copyright (c) 2020 CESNET, z.s.p.o.
 *
 * This source code is licensed under BSD 3-Clause License (the "License").
 * You may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     https://opensource.org/licenses/BSD-3-Clause
 */
#define _UTEST_MAIN_
#include "utests.h"

#include "libyang.h"

/* common module for the tests */
const char *schema_a = "module a {\n"
        "  namespace urn:tests:a;\n"
        "  prefix a;yang-version 1.1;\n"
        "  list l1 {\n"
        "    key \"a b\";\n"
        "    leaf a {\n"
        "      type string;\n"
        "    }\n"
        "    leaf b {\n"
        "      type string;\n"
        "    }\n"
        "    leaf c {\n"
        "      type string;\n"
        "    }\n"
        "  }\n"
        "  list l11 {\n"
        "    key \"a\";\n"
        "    leaf a {\n"
        "      type uint32;\n"
        "    }\n"
        "    leaf b {\n"
        "      type uint32;\n"
        "    }\n"
        "  }\n"
        "  leaf foo {\n"
        "    type uint16;\n"
        "  }\n"
        "  leaf-list ll {\n"
        "    type string;\n"
        "  }\n"
        "  container c {\n"
        "    leaf-list x {\n"
        "      type string;\n"
        "    }\n"
        "  }\n"
        "  anydata any {\n"
        "    config false;\n"
        "  }\n"
        "  anyxml anyx;\n"
        "  leaf-list ll2 {\n"
        "    config false;\n"
        "    type string;\n"
        "  }\n"
        "  list l2 {\n"
        "    config false;\n"
        "    container c {\n"
        "      leaf x {\n"
        "        type string;\n"
        "      }\n"
        "    }\n"
        "  }\n"
        "  container c2 {\n"
        "    config false;\n"
        "    list l3 {\n"
        "      leaf x {\n"
        "        type string;\n"
        "      }\n"
        "      leaf y {\n"
        "        type string;\n"
        "      }\n"
        "    }\n"
        "  }\n"
        "  rpc oper {\n"
        "    input {\n"
        "      leaf param {\n"
        "        type string;\n"
        "      }\n"
        "    }\n"
        "    output {\n"
        "      leaf param {\n"
        "        type int8;\n"
        "      }\n"
        "    }\n"
        "  }\n"
        "}\n";

static void
test_top_level(void **state)
{
    struct lys_module *mod;
    struct lyd_node *node, *rpc;

    UTEST_ADD_MODULE(schema_a, LYS_IN_YANG, NULL, &mod);

    /* list */
    assert_int_equal(lyd_new_list(NULL, mod, "l1", 0, &node, "val_a", "val_b"), LY_SUCCESS);
    lyd_free_tree(node);

    assert_int_equal(lyd_new_list2(NULL, mod, "l1", "[]", 0, &node), LY_EVALID);
    CHECK_LOG_CTX("Unexpected XPath token \"]\" (\"]\").", "/a:l1", 0);

    assert_int_equal(lyd_new_list2(NULL, mod, "l1", "[key1='a'][key2='b']", 0, &node), LY_ENOTFOUND);
    CHECK_LOG_CTX("Not found node \"key1\" in path.", "/a:l1", 0);

    assert_int_equal(lyd_new_list2(NULL, mod, "l1", "[a='a'][b='b'][c='c']", 0, &node), LY_EVALID);
    CHECK_LOG_CTX("Key expected instead of leaf \"c\" in path.", "/a:l1", 0);

    assert_int_equal(lyd_new_list2(NULL, mod, "c", "[a='a'][b='b']", 0, &node), LY_ENOTFOUND);
    CHECK_LOG_CTX("List node \"c\" not found.", NULL, 0);

    assert_int_equal(lyd_new_list2(NULL, mod, "l1", "[a='a'][b='b']", 0, &node), LY_SUCCESS);
    lyd_free_tree(node);

    assert_int_equal(lyd_new_list2(NULL, mod, "l1", "[a=''][b='']", 0, &node), LY_SUCCESS);
    lyd_free_tree(node);

    assert_int_equal(lyd_new_list2(NULL, mod, "l1", "[a:a='a'][a:b='b']", 0, &node), LY_SUCCESS);
    lyd_free_tree(node);

    assert_int_equal(lyd_new_list2(NULL, mod, "l1", "[a=   'a']\n[b  =\t'b']", 0, &node), LY_SUCCESS);
    lyd_free_tree(node);

    const char *key_vals[] = {"a", "b"};

    assert_int_equal(lyd_new_list3(NULL, mod, "l1", key_vals, NULL, 0, &node), LY_SUCCESS);
    lyd_free_tree(node);

    uint32_t val_lens[] = {1, 1};

    assert_int_equal(lyd_new_list3(NULL, mod, "l1", key_vals, val_lens, LYD_NEW_VAL_BIN_VALUE, &node), LY_EINVAL);
    CHECK_LOG_CTX("Invalid argument !(options & 0x04) (lyd_new_list3()).", NULL, 0);
    assert_int_equal(lyd_new_list3_bin(NULL, mod, "l1", (const void **)key_vals, val_lens, 0, &node), LY_SUCCESS);
    lyd_free_tree(node);
    assert_int_equal(lyd_new_list3_bin(NULL, mod, "l1", (const void **)key_vals, val_lens, LYD_NEW_VAL_STORE_ONLY, &node), LY_EINVAL);
    CHECK_LOG_CTX("Invalid argument !(store_only && (format == LY_VALUE_CANON || format == LY_VALUE_LYB)) (_lyd_new_list3()).", NULL, 0);

    assert_int_equal(lyd_new_list3(NULL, mod, "l1", key_vals, val_lens, LYD_NEW_VAL_CANON, &node), LY_SUCCESS);
    lyd_free_tree(node);
    assert_int_equal(lyd_new_list3(NULL, mod, "l1", key_vals, val_lens, LYD_NEW_VAL_CANON | LYD_NEW_VAL_STORE_ONLY, &node), LY_EINVAL);
    CHECK_LOG_CTX("Invalid argument !(store_only && (format == LY_VALUE_CANON || format == LY_VALUE_LYB)) (_lyd_new_list3()).", NULL, 0);

    assert_int_equal(lyd_new_list(NULL, mod, "l1", LYD_NEW_VAL_BIN, &node, "val_a", 5, "val_b", 5), LY_SUCCESS);
    lyd_free_tree(node);
    assert_int_equal(lyd_new_list(NULL, mod, "l1", LYD_NEW_VAL_BIN | LYD_NEW_VAL_STORE_ONLY, &node, "val_a", 5, "val_b", 5), LY_EINVAL);
    CHECK_LOG_CTX("Invalid argument !(store_only && (format == LY_VALUE_CANON || format == LY_VALUE_LYB)) (lyd_new_list()).", NULL, 0);

    assert_int_equal(lyd_new_list(NULL, mod, "l1", LYD_NEW_VAL_CANON, &node, "val_a", "val_b"), LY_SUCCESS);
    lyd_free_tree(node);
    assert_int_equal(lyd_new_list(NULL, mod, "l1", LYD_NEW_VAL_CANON | LYD_NEW_VAL_STORE_ONLY, &node, "val_a", "val_b"), LY_EINVAL);
    CHECK_LOG_CTX("Invalid argument !(store_only && (format == LY_VALUE_CANON || format == LY_VALUE_LYB)) (lyd_new_list()).", NULL, 0);

    /* leaf */
    assert_int_equal(lyd_new_term(NULL, mod, "foo", "[a='a'][b='b'][c='c']", 0, &node), LY_EVALID);
    CHECK_LOG_CTX("Invalid type uint16 value \"[a='a'][b='b'][c='c']\".", "/a:foo", 0);

    assert_int_equal(lyd_new_term(NULL, mod, "c", "value", 0, &node), LY_ENOTFOUND);
    CHECK_LOG_CTX("Term node \"c\" not found.", NULL, 0);

    assert_int_equal(lyd_new_term(NULL, mod, "foo", "256", 0, &node), LY_SUCCESS);
    lyd_free_tree(node);

    assert_int_equal(lyd_new_term(NULL, mod, "foo", "25", LYD_NEW_VAL_BIN, &node), LY_EINVAL);
    CHECK_LOG_CTX("Invalid argument !(options & 0x04) (lyd_new_term()).", NULL, 0);
    assert_int_equal(lyd_new_term_bin(NULL, mod, "foo", "25", 2, LYD_NEW_VAL_BIN, &node), LY_SUCCESS);
    lyd_free_tree(node);
    assert_int_equal(lyd_new_term_bin(NULL, mod, "foo", "25", 2, LYD_NEW_VAL_STORE_ONLY, &node), LY_EINVAL);
    CHECK_LOG_CTX("Invalid argument !(store_only && (format == LY_VALUE_CANON || format == LY_VALUE_LYB)) (_lyd_new_term()).", NULL, 0);

    assert_int_equal(lyd_new_term(NULL, mod, "foo", "25", LYD_NEW_VAL_CANON, &node), LY_SUCCESS);
    lyd_free_tree(node);
    assert_int_equal(lyd_new_term(NULL, mod, "foo", "25", LYD_NEW_VAL_CANON | LYD_NEW_VAL_STORE_ONLY, &node), LY_EINVAL);
    CHECK_LOG_CTX("Invalid argument !(store_only && (format == LY_VALUE_CANON || format == LY_VALUE_LYB)) (_lyd_new_term()).", NULL, 0);

    /* leaf-list */
    assert_int_equal(lyd_new_term(NULL, mod, "ll", "ahoy", 0, &node), LY_SUCCESS);
    lyd_free_tree(node);

    /* container */
    assert_int_equal(lyd_new_inner(NULL, mod, "c", 0, &node), LY_SUCCESS);
    lyd_free_tree(node);

    assert_int_equal(lyd_new_inner(NULL, mod, "l1", 0, &node), LY_ENOTFOUND);
    CHECK_LOG_CTX("Inner node (container, notif, RPC, or action) \"l1\" not found.", NULL, 0);

    assert_int_equal(lyd_new_inner(NULL, mod, "l2", 0, &node), LY_ENOTFOUND);
    CHECK_LOG_CTX("Inner node (container, notif, RPC, or action) \"l2\" not found.", NULL, 0);

    /* anydata */
    assert_int_equal(lyd_new_any(NULL, mod, "any", "{\"node\":\"val\"}", LYD_ANYDATA_STRING, 0, &node), LY_SUCCESS);
    lyd_free_tree(node);
    assert_int_equal(lyd_new_any(NULL, mod, "any", "<node>val</node>", LYD_ANYDATA_STRING, 0, &node), LY_SUCCESS);
    lyd_free_tree(node);

    /* key-less list */
    assert_int_equal(lyd_new_list2(NULL, mod, "l2", "[a='a'][b='b']", 0, &node), LY_EVALID);
    CHECK_LOG_CTX("List predicate defined for keyless list \"l2\" in path.", "/a:l2", 0);

    assert_int_equal(lyd_new_list2(NULL, mod, "l2", "", 0, &node), LY_SUCCESS);
    lyd_free_tree(node);

    assert_int_equal(lyd_new_list2(NULL, mod, "l2", NULL, 0, &node), LY_SUCCESS);
    lyd_free_tree(node);

    assert_int_equal(lyd_new_list(NULL, mod, "l2", 0, &node), LY_SUCCESS);
    lyd_free_tree(node);

    /* RPC */
    assert_int_equal(lyd_new_inner(NULL, mod, "oper", 0, &rpc), LY_SUCCESS);
    assert_int_equal(lyd_new_term(rpc, mod, "param", "22", 0, &node), LY_SUCCESS);
    assert_int_equal(LY_TYPE_STRING, ((struct lysc_node_leaf *)node->schema)->type->basetype);
    assert_int_equal(lyd_new_term(rpc, mod, "param", "22", LYD_NEW_VAL_OUTPUT, &node), LY_SUCCESS);
    assert_int_equal(LY_TYPE_INT8, ((struct lysc_node_leaf *)node->schema)->type->basetype);
    lyd_free_tree(rpc);
}

static void
test_opaq(void **state)
{
    struct lyd_node *root, *node;
    struct lyd_node_opaq *opq;

    UTEST_ADD_MODULE(schema_a, LYS_IN_YANG, NULL, NULL);

    assert_int_equal(lyd_new_opaq(NULL, UTEST_LYCTX, "node1", NULL, NULL, "my-module", &root), LY_SUCCESS);
    assert_null(root->schema);
    opq = (struct lyd_node_opaq *)root;
    assert_string_equal(opq->name.name, "node1");
    assert_string_equal(opq->name.module_name, "my-module");
    assert_string_equal(opq->value, "");

    assert_int_equal(lyd_new_opaq(root, NULL, "node2", "value", NULL, "my-module2", &node), LY_SUCCESS);
    assert_null(node->schema);
    opq = (struct lyd_node_opaq *)node;
    assert_string_equal(opq->name.name, "node2");
    assert_string_equal(opq->name.module_name, "my-module2");
    assert_string_equal(opq->value, "value");
    assert_ptr_equal(opq->parent, root);

    lyd_free_tree(root);
}

static void
test_path(void **state)
{
    LY_ERR ret;
    struct lyd_node *root, *node, *parent;
    struct lys_module *mod;
    char *str;

    UTEST_ADD_MODULE(schema_a, LYS_IN_YANG, NULL, &mod);

    /* create 2 nodes */
    ret = lyd_new_path2(NULL, UTEST_LYCTX, "/a:c/x[.='val']", "vvv", 0, 0, 0, &root, &node);
    assert_int_equal(ret, LY_SUCCESS);
    assert_non_null(root);
    assert_string_equal(root->schema->name, "c");
    assert_non_null(node);
    assert_string_equal(node->schema->name, "x");
    assert_string_equal("val", lyd_get_value(node));

    /* append another */
    ret = lyd_new_path2(root, NULL, "/a:c/x", "val2", 0, 0, 0, &parent, &node);
    assert_int_equal(ret, LY_SUCCESS);
    assert_ptr_equal(parent, node);
    assert_string_equal(node->schema->name, "x");
    assert_string_equal("val2", lyd_get_value(node));

    /* and a last one */
    ret = lyd_new_path2(root, NULL, "x", "val3", 0, 0, 0, &parent, &node);
    assert_int_equal(ret, LY_SUCCESS);
    assert_ptr_equal(parent, node);
    assert_string_equal(node->schema->name, "x");
    assert_string_equal("val3", lyd_get_value(node));

    lyd_free_tree(root);

    /* try LYD_NEWOPT_OPAQ */
    ret = lyd_new_path2(NULL, UTEST_LYCTX, "/a:l1", NULL, 0, 0, 0, NULL, NULL);
    assert_int_equal(ret, LY_EINVAL);
    CHECK_LOG_CTX("Predicate missing for list \"l1\" in path \"/a:l1\".", "/a:l1", 0);

    ret = lyd_new_path2(NULL, UTEST_LYCTX, "/a:l1", NULL, 0, 0, LYD_NEW_PATH_OPAQ, NULL, &root);
    assert_int_equal(ret, LY_SUCCESS);
    assert_non_null(root);
    assert_null(root->schema);

    lyd_free_tree(root);

    ret = lyd_new_path2(NULL, UTEST_LYCTX, "/a:foo", NULL, 0, 0, 0, NULL, NULL);
    assert_int_equal(ret, LY_EVALID);
    CHECK_LOG_CTX("Invalid type uint16 empty value.", "/a:foo", 0);

    ret = lyd_new_path2(NULL, UTEST_LYCTX, "/a:foo", NULL, 0, 0, LYD_NEW_PATH_OPAQ, NULL, &root);
    assert_int_equal(ret, LY_SUCCESS);
    assert_non_null(root);
    assert_null(root->schema);

    lyd_free_tree(root);

    ret = lyd_new_path(NULL, UTEST_LYCTX, "/a:l11", NULL, LYD_NEW_PATH_OPAQ, &root);
    assert_int_equal(ret, LY_SUCCESS);
    assert_non_null(root);
    assert_null(root->schema);

    ret = lyd_new_path(root, NULL, "a", NULL, LYD_NEW_PATH_OPAQ, NULL);
    assert_int_equal(ret, LY_SUCCESS);
    assert_non_null(lyd_child(root));
    assert_null(lyd_child(root)->schema);

    ret = lyd_new_path(root, NULL, "b", NULL, LYD_NEW_PATH_OPAQ, NULL);
    assert_int_equal(ret, LY_SUCCESS);
    assert_non_null(lyd_child(root)->next);
    assert_null(lyd_child(root)->next->schema);

    lyd_free_tree(root);

    /* key-less list */
    ret = lyd_new_path2(NULL, UTEST_LYCTX, "/a:c2/l3/x", "val1", 0, 0, 0, &root, &node);
    assert_int_equal(ret, LY_SUCCESS);
    assert_non_null(root);
    assert_string_equal(node->schema->name, "x");
    assert_string_equal("val1", lyd_get_value(node));

    ret = lyd_new_path2(root, NULL, "/a:c2/l3[1]", NULL, 0, 0, 0, NULL, &node);
    assert_int_equal(ret, LY_EEXIST);
    CHECK_LOG_CTX("Path \"/a:c2/l3[1]\" already exists.", "/a:c2/l3[1]", 0);

    ret = lyd_new_path2(root, NULL, "/a:c2/l3[2]/x", "val2", 0, 0, 0, NULL, &node);
    assert_int_equal(ret, LY_SUCCESS);

    ret = lyd_new_path2(root, NULL, "/a:c2/l3/x", "val3", 0, 0, 0, NULL, &node);
    assert_int_equal(ret, LY_SUCCESS);
    assert_non_null(node);

    ret = lyd_new_path2(root, NULL, "/a:c2/l3[4]/x", "empty", 0, 0, 0, NULL, &node);
    assert_int_equal(ret, LY_SUCCESS);
    assert_non_null(node);

    ret = lyd_new_path2(root, NULL, "/a:c2/l3[4]/x", "val4", 0, 0, LYD_NEW_PATH_UPDATE, NULL, &node);
    assert_int_equal(ret, LY_SUCCESS);
    assert_non_null(node);

    ret = lyd_new_path2(root, NULL, "/a:c2/l3[5]/x", "val5", 0, 0, 0, NULL, &node);
    assert_int_equal(ret, LY_SUCCESS);
    assert_non_null(node);

    ret = lyd_new_path2(root, NULL, "/a:c2/l3[6]/x", "val6", 0, 0, 0, NULL, &node);
    assert_int_equal(ret, LY_SUCCESS);
    assert_non_null(node);

    lyd_print_mem(&str, root, LYD_XML, LYD_PRINT_WITHSIBLINGS);
    assert_string_equal(str,
            "<c2 xmlns=\"urn:tests:a\">\n"
            "  <l3>\n"
            "    <x>val1</x>\n"
            "  </l3>\n"
            "  <l3>\n"
            "    <x>val2</x>\n"
            "  </l3>\n"
            "  <l3>\n"
            "    <x>val3</x>\n"
            "  </l3>\n"
            "  <l3>\n"
            "    <x>val4</x>\n"
            "  </l3>\n"
            "  <l3>\n"
            "    <x>val5</x>\n"
            "  </l3>\n"
            "  <l3>\n"
            "    <x>val6</x>\n"
            "  </l3>\n"
            "</c2>\n");
    free(str);
    lyd_free_siblings(root);

    /* state leaf-list */
    ret = lyd_new_path2(NULL, UTEST_LYCTX, "/a:ll2", "val_first", 0, 0, 0, &root, &node);
    assert_int_equal(ret, LY_SUCCESS);
    assert_non_null(root);
    assert_string_equal(node->schema->name, "ll2");
    assert_string_equal("val_first", lyd_get_value(node));

    ret = lyd_new_path2(root, NULL, "/a:ll2[1]", "", 0, 0, 0, NULL, &node);
    assert_int_equal(ret, LY_EEXIST);
    CHECK_LOG_CTX("Path \"/a:ll2[1]\" already exists.", "/a:ll2[1]", 0);

    ret = lyd_new_path2(root, NULL, "/a:ll2[2]", "val2", 0, 0, 0, NULL, &node);
    assert_int_equal(ret, LY_SUCCESS);

    ret = lyd_new_path2(root, NULL, "/a:ll2[1]", "val", 0, 0, LYD_NEW_PATH_UPDATE, NULL, &node);
    assert_int_equal(ret, LY_SUCCESS);
    assert_non_null(node);

    ret = lyd_new_path2(root, UTEST_LYCTX, "/a:ll2", "val3", 0, 0, 0, NULL, &node);
    assert_int_equal(ret, LY_SUCCESS);
    assert_non_null(node);

    ret = lyd_new_path2(root, NULL, "/a:ll2[3][.='val3']", NULL, 0, 0, 0, NULL, &node);
    assert_int_equal(ret, LY_EVALID);
    CHECK_LOG_CTX("Unparsed characters \"[.='val3']\" left at the end of path.", NULL, 0);

    lyd_print_mem(&str, root, LYD_XML, LYD_PRINT_WITHSIBLINGS);
    assert_string_equal(str,
            "<ll2 xmlns=\"urn:tests:a\">val</ll2>\n"
            "<ll2 xmlns=\"urn:tests:a\">val2</ll2>\n"
            "<ll2 xmlns=\"urn:tests:a\">val3</ll2>\n");
    free(str);
    lyd_free_siblings(root);

    /* anydata */
    ret = lyd_new_path2(NULL, UTEST_LYCTX, "/a:any", "<elem>val</elem>", 0, LYD_ANYDATA_XML, 0, &root, NULL);
    assert_int_equal(ret, LY_SUCCESS);
    assert_non_null(root);

    lyd_print_mem(&str, root, LYD_XML, LYD_PRINT_WITHSIBLINGS);
    assert_string_equal(str,
            "<any xmlns=\"urn:tests:a\">\n"
            "  <elem>val</elem>\n"
            "</any>\n");
    free(str);
    lyd_print_mem(&str, root, LYD_JSON, LYD_PRINT_WITHSIBLINGS);
    assert_string_equal(str,
            "{\n"
            "  \"a:any\": {\n"
            "    \"elem\": \"val\"\n"
            "  }\n"
            "}\n");
    free(str);
    lyd_free_siblings(root);

    /* anyxml */
    ret = lyd_new_path2(NULL, UTEST_LYCTX, "/a:anyx", "<a/><b/><c/>", 0, LYD_ANYDATA_XML, 0, &root, NULL);
    assert_int_equal(ret, LY_SUCCESS);
    assert_non_null(root);

    lyd_print_mem(&str, root, LYD_XML, LYD_PRINT_WITHSIBLINGS);
    assert_string_equal(str,
            "<anyx xmlns=\"urn:tests:a\">\n"
            "  <a/>\n"
            "  <b/>\n"
            "  <c/>\n"
            "</anyx>\n");
    free(str);
    lyd_print_mem(&str, root, LYD_JSON, LYD_PRINT_WITHSIBLINGS);
    assert_string_equal(str,
            "{\n"
            "  \"a:anyx\": {\n"
            "    \"a\": [null],\n"
            "    \"b\": [null],\n"
            "    \"c\": [null]\n"
            "  }\n"
            "}\n");
    free(str);
    lyd_free_siblings(root);

    ret = lyd_new_path2(NULL, UTEST_LYCTX, "/a:anyx", "{\"a\":[null],\"b\":[null],\"c\":[null]}", 0, LYD_ANYDATA_JSON, 0, &root, NULL);
    assert_int_equal(ret, LY_SUCCESS);
    assert_non_null(root);

    lyd_print_mem(&str, root, LYD_XML, LYD_PRINT_WITHSIBLINGS);
    assert_string_equal(str,
            "<anyx xmlns=\"urn:tests:a\">\n"
            "  <a/>\n"
            "  <b/>\n"
            "  <c/>\n"
            "</anyx>\n");
    free(str);
    lyd_print_mem(&str, root, LYD_JSON, LYD_PRINT_WITHSIBLINGS);
    assert_string_equal(str,
            "{\n"
            "  \"a:anyx\": {\n"
            "    \"a\": [null],\n"
            "    \"b\": [null],\n"
            "    \"c\": [null]\n"
            "  }\n"
            "}\n");
    free(str);
    lyd_free_siblings(root);
}

static void
test_path_ext(void **state)
{
    LY_ERR ret;
    struct lyd_node *root, *node;
    struct lys_module *mod;
    const char *mod_str = "module ext {yang-version 1.1; namespace urn:tests:extensions:ext; prefix e;"
            "import ietf-restconf {revision-date 2017-01-26; prefix rc;}"
            "rc:yang-data template {container c {leaf x {type string;} leaf y {type string;} leaf z {type string;}}}}";

    assert_int_equal(LY_SUCCESS, ly_ctx_set_searchdir(UTEST_LYCTX, TESTS_DIR_MODULES_YANG));
    assert_non_null(ly_ctx_load_module(UTEST_LYCTX, "ietf-restconf", "2017-01-26", NULL));

    UTEST_ADD_MODULE(mod_str, LYS_IN_YANG, NULL, &mod);

    /* create x */
    ret = lyd_new_ext_path(NULL, &mod->compiled->exts[0], "/ext:c/x", "xxx", 0, &root);
    assert_int_equal(ret, LY_SUCCESS);
    assert_non_null(root);
    assert_string_equal(root->schema->name, "c");
    assert_non_null(node = lyd_child(root));
    assert_string_equal(node->schema->name, "x");
    assert_string_equal("xxx", lyd_get_value(node));

    /* append y */
    ret = lyd_new_ext_path(root, &mod->compiled->exts[0], "/ext:c/y", "yyy", 0, &node);
    assert_int_equal(ret, LY_SUCCESS);
    assert_string_equal(node->schema->name, "y");
    assert_string_equal("yyy", lyd_get_value(node));

    /* append z */
    ret = lyd_new_path(root, NULL, "ext:z", "zzz", 0, &node);
    assert_int_equal(ret, LY_SUCCESS);
    assert_string_equal(node->schema->name, "z");
    assert_string_equal("zzz", lyd_get_value(node));

    lyd_free_tree(root);
}

int
main(void)
{
    const struct CMUnitTest tests[] = {
        UTEST(test_top_level),
        UTEST(test_opaq),
        UTEST(test_path),
        UTEST(test_path_ext),
    };

    return cmocka_run_group_tests(tests, NULL, NULL);
}