tests/src/test_xml.c - github/CESNET/libyang - Gitiles

 /*
  * @file xml.c
  * @author: Radek Krejci <rkrejci@cesnet.cz>
  * @brief unit tests for functions from xml.c
  *
  * Copyright (c) 2018 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
  */

 #include "common.h"
 #include "../../src/set.c"
 #include "../../src/xml.c"
 #include "../../src/common.c"
 #include "../../src/log.c"

 #include <stdarg.h>
 #include <stddef.h>
 #include <setjmp.h>
 #include <cmocka.h>

 #include <stdio.h>
 #include <string.h>

 #include "libyang.h"

 #define BUFSIZE 1024
 char logbuf[BUFSIZE] = {0};

 /* set to 0 to printing error messages to stderr instead of checking them in code */
 #define ENABLE_LOGGER_CHECKING 1

 static void
 logger(LY_LOG_LEVEL level, const char *msg, const char *path)
 {
     (void) level; /* unused */

     if (path) {
         snprintf(logbuf, BUFSIZE - 1, "%s %s", msg, path);
     } else {
         strncpy(logbuf, msg, BUFSIZE - 1);
     }
 }

 static int
 logger_setup(void **state)
 {
     (void) state; /* unused */
 #if ENABLE_LOGGER_CHECKING
     ly_set_log_clb(logger, 1);
 #endif
     return 0;
 }

 void
 logbuf_clean(void)
 {
     logbuf[0] = '\0';
 }

 #if ENABLE_LOGGER_CHECKING
 #   define logbuf_assert(str) assert_string_equal(logbuf, str)
 #else
 #   define logbuf_assert(str)
 #endif

 static void
 test_element(void **state)
 {
     (void) state; /* unused */

     size_t name_len, prefix_len;
     size_t buf_len, len;
     const char *name, *prefix;
     char *buf = NULL, *out = NULL;
     const char *str, *p;
     int dynamic;

     struct lyxml_context ctx;
     memset(&ctx, 0, sizeof ctx);
     ctx.line = 1;

     /* empty */
     str = "";
     assert_int_equal(LY_SUCCESS, lyxml_get_element(&ctx, &str, &prefix, &prefix_len, &name, &name_len));
     assert_null(name);
     assert_int_equal(LYXML_END, ctx.status);
     assert_true(str[0] == '\0');

     /* end element */
     str = "</element>";
     assert_int_equal(LY_EVALID, lyxml_get_element(&ctx, &str, &prefix, &prefix_len, &name, &name_len));
     logbuf_assert("Opening and closing elements tag missmatch (\"element>\"). Line number 1.");


     /* no element */
     logbuf_clean();
     str = p = "no data present";
     assert_int_equal(LY_EINVAL, lyxml_get_element(&ctx, &str, &prefix, &prefix_len, &name, &name_len));
     assert_null(name);
     assert_ptr_equal(p, str); /* input data not eaten */
     logbuf_assert("");

     /* not supported DOCTYPE */
     str = p = "<!DOCTYPE greeting SYSTEM \"hello.dtd\"><greeting/>";
     assert_int_equal(LY_EVALID, lyxml_get_element(&ctx, &str, &prefix, &prefix_len, &name, &name_len));
     assert_null(name);
     assert_ptr_equal(p, str); /* input data not eaten */
     logbuf_assert("Document Type Declaration not supported. Line number 1.");

     /* invalid XML */
     str = p = "<!NONSENCE/>";
     assert_int_equal(LY_EVALID, lyxml_get_element(&ctx, &str, &prefix, &prefix_len, &name, &name_len));
     assert_null(name);
     assert_ptr_equal(p, str); /* input data not eaten */
     logbuf_assert("Unknown XML section \"<!NONSENCE/>\". Line number 1.");

     /* unqualified element */
     str = "  <  element/>";
     assert_int_equal(LY_SUCCESS, lyxml_get_element(&ctx, &str, &prefix, &prefix_len, &name, &name_len));
     assert_null(prefix);
     assert_false(strncmp("element", name, name_len));
     assert_int_equal(7, name_len);
     assert_int_equal(LYXML_ELEMENT, ctx.status);
     assert_string_equal("", str);
     assert_int_equal(0, ctx.elements.count);

     str = "  <  element attr=\'x\'/>";
     assert_int_equal(LY_SUCCESS, lyxml_get_element(&ctx, &str, &prefix, &prefix_len, &name, &name_len));
     assert_int_equal(LYXML_ATTRIBUTE, ctx.status);
     assert_string_equal("attr=\'x\'/>", str);
     assert_int_equal(1, ctx.elements.count);
     assert_int_equal(LY_SUCCESS, lyxml_get_attribute(&ctx, &str, &prefix, &prefix_len, &name, &name_len));
     assert_int_equal(LYXML_ATTR_CONTENT, ctx.status);
     assert_string_equal("\'x\'/>", str);
     assert_int_equal(1, ctx.elements.count);
     assert_int_equal(LY_SUCCESS, lyxml_get_string(&ctx, &str, &buf, &buf_len, &out, &len, &dynamic));
     assert_int_equal(LYXML_ELEMENT, ctx.status);
     assert_string_equal("", str);
     assert_int_equal(0, ctx.elements.count);

     str = "<?xml version=\"1.0\"?>  <!-- comment --> <![CDATA[<greeting>Hello, world!</greeting>]]> <?TEST xxx?> <element/>";
     assert_int_equal(LY_SUCCESS, lyxml_get_element(&ctx, &str, &prefix, &prefix_len, &name, &name_len));
     assert_null(prefix);
     assert_false(strncmp("element", name, name_len));
     assert_int_equal(7, name_len);
     assert_int_equal(LYXML_ELEMENT, ctx.status);
     assert_string_equal("", str);

     str = "<element xmlns=\"urn\"></element>";
     assert_int_equal(LY_SUCCESS, lyxml_get_element(&ctx, &str, &prefix, &prefix_len, &name, &name_len));
     assert_null(prefix);
     assert_false(strncmp("element", name, name_len));
     assert_int_equal(7, name_len);
     assert_int_equal(LYXML_ATTRIBUTE, ctx.status);
     assert_string_equal("xmlns=\"urn\"></element>", str);
     /* cleean context by getting closing tag */
     str += 12;
     assert_int_equal(LY_SUCCESS, lyxml_get_element(&ctx, &str, &prefix, &prefix_len, &name, &name_len));

     /* qualified element */
     str = "  <  yin:element/>";
     assert_int_equal(LY_SUCCESS, lyxml_get_element(&ctx, &str, &prefix, &prefix_len, &name, &name_len));
     assert_false(strncmp("yin", prefix, prefix_len));
     assert_false(strncmp("element", name, name_len));
     assert_int_equal(3, prefix_len);
     assert_int_equal(7, name_len);
     assert_int_equal(LYXML_ELEMENT, ctx.status);
     assert_string_equal("", str);

     str = "<yin:element xmlns=\"urn\"></element>";
     assert_int_equal(LY_SUCCESS, lyxml_get_element(&ctx, &str, &prefix, &prefix_len, &name, &name_len));
     assert_false(strncmp("yin", prefix, prefix_len));
     assert_false(strncmp("element", name, name_len));
     assert_int_equal(3, prefix_len);
     assert_int_equal(7, name_len);
     assert_int_equal(LYXML_ATTRIBUTE, ctx.status);
     assert_string_equal("xmlns=\"urn\"></element>", str);
     /* cleean context by getting closing tag */
     str += 12;
     assert_int_equal(LY_EVALID, lyxml_get_element(&ctx, &str, &prefix, &prefix_len, &name, &name_len));
     logbuf_assert("Opening and closing elements tag missmatch (\"element>\"). Line number 1.");
     str = "</yin:element/>";
     assert_int_equal(LY_EVALID, lyxml_get_element(&ctx, &str, &prefix, &prefix_len, &name, &name_len));
     logbuf_assert("Unexpected data \"/>\" in closing element tag. Line number 1.");
     lyxml_context_clear(&ctx);

     /* UTF8 characters */
     str = "<𠜎€𠜎Øn:𠜎€𠜎Øn/>";
     assert_int_equal(LY_SUCCESS, lyxml_get_element(&ctx, &str, &prefix, &prefix_len, &name, &name_len));
     assert_false(strncmp("𠜎€𠜎Øn", prefix, prefix_len));
     assert_false(strncmp("𠜎€𠜎Øn", name, name_len));
     assert_int_equal(14, prefix_len);
     assert_int_equal(14, name_len);
     assert_int_equal(LYXML_ELEMENT, ctx.status);
     assert_string_equal("", str);

     /* invalid UTF-8 character */
     str = "<¢:element>";
     assert_int_equal(LY_EVALID, lyxml_get_element(&ctx, &str, &prefix, &prefix_len, &name, &name_len));
     logbuf_assert("Identifier \"¢:element>\" starts with invalid character. Line number 1.");
     str = "<yin:c⁐element>";
     assert_int_equal(LY_EVALID, lyxml_get_element(&ctx, &str, &prefix, &prefix_len, &name, &name_len));
     logbuf_assert("Invalid character sequence \"⁐element>\", expected whitespace or element tag termination ('>' or '/>'. Line number 1.");
 }

 static void
 test_attribute(void **state)
 {
     (void) state; /* unused */

     size_t name_len, prefix_len;
     const char *name, *prefix;
     const char *str, *p;

     struct lyxml_context ctx;
     memset(&ctx, 0, sizeof ctx);
     ctx.line = 1;

     /* empty - without element tag termination */
     str = "";
     assert_int_equal(LY_EINVAL, lyxml_get_attribute(&ctx, &str, &prefix, &prefix_len, &name, &name_len));

     /* not an attribute */
     str = p = "unknown/>";
     assert_int_equal(LY_EVALID, lyxml_get_attribute(&ctx, &str, &prefix, &prefix_len, &name, &name_len));
     assert_ptr_equal(p, str); /* input data not eaten */
     logbuf_assert("Invalid character sequence \"/>\", expected whitespace or '='. Line number 1.");
     str = p = "unknown />";
     assert_int_equal(LY_EVALID, lyxml_get_attribute(&ctx, &str, &prefix, &prefix_len, &name, &name_len));
     assert_ptr_equal(p, str); /* input data not eaten */
     logbuf_assert("Invalid character sequence \"/>\", expected '='. Line number 1.");
     str = p = "xxx=/>";
     assert_int_equal(LY_EVALID, lyxml_get_attribute(&ctx, &str, &prefix, &prefix_len, &name, &name_len));
     assert_ptr_equal(p, str); /* input data not eaten */
     logbuf_assert("Invalid character sequence \"/>\", expected either single or double quotation mark. Line number 1.");
     str = p = "xxx\n = yyy/>";
     assert_int_equal(LY_EVALID, lyxml_get_attribute(&ctx, &str, &prefix, &prefix_len, &name, &name_len));
     assert_ptr_equal(p, str); /* input data not eaten */
     logbuf_assert("Invalid character sequence \"yyy/>\", expected either single or double quotation mark. Line number 2.");

     /* valid attribute */
     str = "xmlns=\"urn\">";
     assert_int_equal(LY_SUCCESS, lyxml_get_attribute(&ctx, &str, &prefix, &prefix_len, &name, &name_len));
     assert_non_null(name);
     assert_null(prefix);
     assert_int_equal(5, name_len);
     assert_int_equal(0, prefix_len);
     assert_false(strncmp("xmlns", name, name_len));
     assert_string_equal("\"urn\">", str);
     assert_int_equal(LYXML_ATTR_CONTENT, ctx.status);

     str = "xmlns:nc\n = \'urn\'/>";
     assert_int_equal(LY_SUCCESS, lyxml_get_attribute(&ctx, &str, &prefix, &prefix_len, &name, &name_len));
     assert_non_null(name);
     assert_non_null(prefix);
     assert_int_equal(2, name_len);
     assert_int_equal(5, prefix_len);
     assert_int_equal(3, ctx.line);
     assert_false(strncmp("xmlns", prefix, prefix_len));
     assert_false(strncmp("nc", name, name_len));
     assert_string_equal("\'urn\'/>", str);
     assert_int_equal(LYXML_ATTR_CONTENT, ctx.status);

 }

 static void
 test_text(void **state)
 {
     (void) state; /* unused */

     size_t buf_len, len;
     int dynamic;
     const char *str, *p;
     char *buf = NULL, *out = NULL;

     struct lyxml_context ctx;
     memset(&ctx, 0, sizeof ctx);
     ctx.line = 1;

     /* empty attribute value */
     ctx.status = LYXML_ATTR_CONTENT;
     str = "\"\"";
     assert_int_equal(LY_SUCCESS, lyxml_get_string(&ctx, &str, &buf, &buf_len, &out, &len, &dynamic));
     assert_null(buf);
     assert_ptr_equal(&str[-1], out);
     assert_int_equal(0, dynamic);
     assert_int_equal(0, len);
     assert_true(str[0] == '\0'); /* everything eaten */
     assert_int_equal(LYXML_ATTRIBUTE, ctx.status);

     ctx.status = LYXML_ATTR_CONTENT;
     str = "\'\'";
     assert_int_equal(LY_SUCCESS, lyxml_get_string(&ctx, &str, &buf, &buf_len, &out, &len, &dynamic));
     assert_null(buf);
     assert_ptr_equal(&str[-1], out);
     assert_int_equal(0, dynamic);
     assert_int_equal(0, len);
     assert_true(str[0] == '\0'); /* everything eaten */
     assert_int_equal(LYXML_ATTRIBUTE, ctx.status);

     /* empty element content - only formating before defining child */
     ctx.status = LYXML_ELEM_CONTENT;
     str = "\n  <";
     assert_int_equal(LY_EINVAL, lyxml_get_string(&ctx, &str, &buf, &buf_len, &out, &len, &dynamic));
     assert_null(buf);
     assert_string_equal("<", str);

     /* empty element content is invalid - missing content terminating character < */
     ctx.status = LYXML_ELEM_CONTENT;
     str = "";
     assert_int_equal(LY_EVALID, lyxml_get_string(&ctx, &str, &buf, &buf_len, &out, &len, &dynamic));
     assert_null(buf);
     logbuf_assert("Unexpected end-of-file. Line number 2.");

     ctx.status = LYXML_ELEM_CONTENT;
     str = p = "xxx";
     assert_int_equal(LY_EVALID, lyxml_get_string(&ctx, &str, &buf, &buf_len, &out, &len, &dynamic));
     assert_null(buf);
     logbuf_assert("Unexpected end-of-file. Line number 2.");
     assert_ptr_equal(p, str); /* input data not eaten */

     /* valid strings */
     ctx.status = LYXML_ELEM_CONTENT;
     str = "€𠜎Øn \n&lt;&amp;&quot;&apos;&gt; &#82;&#x4f;&#x4B;<";
     assert_int_equal(LY_SUCCESS, lyxml_get_string(&ctx, &str, &buf, &buf_len, &out, &len, &dynamic));
     assert_int_not_equal(0, dynamic);
     assert_non_null(buf);
     assert_ptr_equal(out, buf);
     assert_int_equal(22, buf_len);
     assert_int_equal(21, len);
     assert_string_equal("€𠜎Øn \n<&\"\'> ROK", buf);
     assert_string_equal("<", str);
     assert_int_equal(LYXML_ELEMENT, ctx.status);

     /* test using n-bytes UTF8 hexadecimal code points */
     ctx.status = LYXML_ATTR_CONTENT;
     str = "\'&#x0024;&#x00A2;&#x20ac;&#x10348;\'";
     assert_int_equal(LY_SUCCESS, lyxml_get_string(&ctx, &str, &buf, &buf_len, &out, &len, &dynamic));
     assert_int_not_equal(0, dynamic);
     assert_non_null(buf);
     assert_ptr_equal(out, buf);
     assert_int_equal(22, buf_len);
     assert_int_equal(10, len);
     assert_string_equal("$¢€𐍈", buf);
     assert_int_equal(LYXML_ATTRIBUTE, ctx.status);

     free(buf);
     buf = NULL;

     /* invalid characters in string */
     ctx.status = LYXML_ATTR_CONTENT;
     str = p = "\'&#x52\'";
     assert_int_equal(LY_EVALID, lyxml_get_string(&ctx, &str, &buf, &buf_len, &out, &len, &dynamic));
     logbuf_assert("Invalid character sequence \"'\", expected ;. Line number 3.");
     assert_null(buf);
     assert_ptr_equal(p, str); /* input data not eaten */
     ctx.status = LYXML_ATTR_CONTENT;
     str = p = "\"&#82\"";
     assert_int_equal(LY_EVALID, lyxml_get_string(&ctx, &str, &buf, &buf_len, &out, &len, &dynamic));
     logbuf_assert("Invalid character sequence \"\"\", expected ;. Line number 3.");
     assert_null(buf);
     assert_ptr_equal(p, str); /* input data not eaten */
     ctx.status = LYXML_ATTR_CONTENT;
     str = p = "\"&nonsence;\"";
     assert_int_equal(LY_EVALID, lyxml_get_string(&ctx, &str, &buf, &buf_len, &out, &len, &dynamic));
     logbuf_assert("Entity reference \"&nonsence;\" not supported, only predefined references allowed. Line number 3.");
     assert_null(buf);
     assert_ptr_equal(p, str); /* input data not eaten */
     ctx.status = LYXML_ELEM_CONTENT;
     str = p = "&#o122;";
     assert_int_equal(LY_EVALID, lyxml_get_string(&ctx, &str, &buf, &buf_len, &out, &len, &dynamic));
     logbuf_assert("Invalid character reference \"&#o122;\". Line number 3.");
     assert_null(buf);
     assert_ptr_equal(p, str); /* input data not eaten */

     ctx.status = LYXML_ATTR_CONTENT;
     str = p = "\'&#x06;\'";
     assert_int_equal(LY_EVALID, lyxml_get_string(&ctx, &str, &buf, &buf_len, &out, &len, &dynamic));
     logbuf_assert("Invalid character reference \"&#x06;\'\" (0x00000006). Line number 3.");
     assert_null(buf);
     assert_ptr_equal(p, str); /* input data not eaten */
     ctx.status = LYXML_ATTR_CONTENT;
     str = p = "\'&#xfdd0;\'";
     assert_int_equal(LY_EVALID, lyxml_get_string(&ctx, &str, &buf, &buf_len, &out, &len, &dynamic));
     logbuf_assert("Invalid character reference \"&#xfdd0;\'\" (0x0000fdd0). Line number 3.");
     assert_null(buf);
     assert_ptr_equal(p, str); /* input data not eaten */
     ctx.status = LYXML_ATTR_CONTENT;
     str = p = "\'&#xffff;\'";
     assert_int_equal(LY_EVALID, lyxml_get_string(&ctx, &str, &buf, &buf_len, &out, &len, &dynamic));
     logbuf_assert("Invalid character reference \"&#xffff;\'\" (0x0000ffff). Line number 3.");
     assert_null(buf);
     assert_ptr_equal(p, str); /* input data not eaten */
 }

 static void
 test_ns(void **state)
 {
     (void) state; /* unused */

     const char *e1, *e2;
     const struct lyxml_ns *ns;

     struct lyxml_context ctx;
     memset(&ctx, 0, sizeof ctx);
     ctx.line = 1;

     e1 = "element1";
     e2 = "element2";
     /* simulate adding open element1 into context */
     ctx.elements.count++;
     /* processing namespace definitions */
     assert_int_equal(LY_SUCCESS, lyxml_ns_add(&ctx, e1, NULL, 0, strdup("urn:default")));
     assert_int_equal(LY_SUCCESS, lyxml_ns_add(&ctx, e1, "nc", 2, strdup("urn:nc1")));
     /* simulate adding open element2 into context */
     ctx.elements.count++;
     /* processing namespace definitions */
     assert_int_equal(LY_SUCCESS, lyxml_ns_add(&ctx, e2, "nc", 2, strdup("urn:nc2")));
     assert_int_equal(3, ctx.ns.count);
     assert_int_not_equal(0, ctx.ns.size);

     ns = lyxml_ns_get(&ctx, NULL, 0);
     assert_non_null(ns);
     assert_null(ns->prefix);
     assert_string_equal("urn:default", ns->uri);

     ns = lyxml_ns_get(&ctx, "nc", 2);
     assert_non_null(ns);
     assert_string_equal("nc", ns->prefix);
     assert_string_equal("urn:nc2", ns->uri);

     /* simulate closing element2 */
     ctx.elements.count--;
     assert_int_equal(LY_SUCCESS, lyxml_ns_rm(&ctx, e2));
     assert_int_equal(2, ctx.ns.count);

     ns = lyxml_ns_get(&ctx, "nc", 2);
     assert_non_null(ns);
     assert_string_equal("nc", ns->prefix);
     assert_string_equal("urn:nc1", ns->uri);

     /* simulate closing element1 */
     ctx.elements.count--;
     assert_int_equal(LY_SUCCESS, lyxml_ns_rm(&ctx, e1));
     assert_int_equal(0, ctx.ns.count);

     assert_null(lyxml_ns_get(&ctx, "nc", 2));
     assert_null(lyxml_ns_get(&ctx, NULL, 0));
 }

 static void
 test_ns2(void **state)
 {
     (void) state; /* unused */

     const char *e1, *e2;

     struct lyxml_context ctx;
     memset(&ctx, 0, sizeof ctx);
     ctx.line = 1;

     /* parent element has the same name as its child (and for some reason both names are stored at the same place) */
     e1 = e2 = "element1";
     /* simulate adding open element1 into context */
     ctx.elements.count++;
     /* default namespace defined in parent element1 */
     assert_int_equal(LY_SUCCESS, lyxml_ns_add(&ctx, e1, NULL, 0, strdup("urn:default")));
     assert_int_equal(1, ctx.ns.count);
     /* going into child element1 */
     e1 = e2;
     /* simulate adding open element1 into context */
     ctx.elements.count++;
     /* no namespace defined, going out (first, simulate closing of so far open element) */
     ctx.elements.count--;
     assert_int_equal(LY_SUCCESS, lyxml_ns_rm(&ctx, e2));
     assert_int_equal(1, ctx.ns.count);
     /* nothing else, going out of the parent element1 (first, simulate closing of so far open element) */
     ctx.elements.count--;
     assert_int_equal(LY_SUCCESS, lyxml_ns_rm(&ctx, e1));
     assert_int_equal(0, ctx.ns.count);
 }

 int main(void)
 {
     const struct CMUnitTest tests[] = {
         cmocka_unit_test_setup(test_element, logger_setup),
         cmocka_unit_test_setup(test_attribute, logger_setup),
         cmocka_unit_test_setup(test_text, logger_setup),
         cmocka_unit_test_setup(test_ns, logger_setup),
         cmocka_unit_test_setup(test_ns2, logger_setup),
     };

     return cmocka_run_group_tests(tests, NULL, NULL);
 }
	/*
	* @file xml.c
	* @author: Radek Krejci <rkrejci@cesnet.cz>
	* @brief unit tests for functions from xml.c
	*
	* Copyright (c) 2018 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
	*/

	#include "common.h"
	#include "../../src/set.c"
	#include "../../src/xml.c"
	#include "../../src/common.c"
	#include "../../src/log.c"

	#include <stdarg.h>
	#include <stddef.h>
	#include <setjmp.h>
	#include <cmocka.h>

	#include <stdio.h>
	#include <string.h>

	#include "libyang.h"

	#define BUFSIZE 1024
	char logbuf[BUFSIZE] = {0};

	/* set to 0 to printing error messages to stderr instead of checking them in code */
	#define ENABLE_LOGGER_CHECKING 1

	static void
	logger(LY_LOG_LEVEL level, const char msg, const char path)
	{
	(void) level; /* unused */

	if (path) {
	snprintf(logbuf, BUFSIZE - 1, "%s %s", msg, path);
	} else {
	strncpy(logbuf, msg, BUFSIZE - 1);
	}
	}

	static int
	logger_setup(void **state)
	{
	(void) state; /* unused */
	#if ENABLE_LOGGER_CHECKING
	ly_set_log_clb(logger, 1);
	#endif
	return 0;
	}

	void
	logbuf_clean(void)
	{
	logbuf[0] = '\0';
	}

	#if ENABLE_LOGGER_CHECKING
	# define logbuf_assert(str) assert_string_equal(logbuf, str)
	#else
	# define logbuf_assert(str)
	#endif

	static void
	test_element(void **state)
	{
	(void) state; /* unused */

	size_t name_len, prefix_len;
	size_t buf_len, len;
	const char name, prefix;
	char buf = NULL, out = NULL;
	const char str, p;
	int dynamic;

	struct lyxml_context ctx;
	memset(&ctx, 0, sizeof ctx);
	ctx.line = 1;

	/* empty */
	str = "";
	assert_int_equal(LY_SUCCESS, lyxml_get_element(&ctx, &str, &prefix, &prefix_len, &name, &name_len));
	assert_null(name);
	assert_int_equal(LYXML_END, ctx.status);
	assert_true(str[0] == '\0');

	/* end element */
	str = "</element>";
	assert_int_equal(LY_EVALID, lyxml_get_element(&ctx, &str, &prefix, &prefix_len, &name, &name_len));
	logbuf_assert("Opening and closing elements tag missmatch (\"element>\"). Line number 1.");


	/* no element */
	logbuf_clean();
	str = p = "no data present";
	assert_int_equal(LY_EINVAL, lyxml_get_element(&ctx, &str, &prefix, &prefix_len, &name, &name_len));
	assert_null(name);
	assert_ptr_equal(p, str); /* input data not eaten */
	logbuf_assert("");

	/* not supported DOCTYPE */
	str = p = "<!DOCTYPE greeting SYSTEM \"hello.dtd\"><greeting/>";
	assert_int_equal(LY_EVALID, lyxml_get_element(&ctx, &str, &prefix, &prefix_len, &name, &name_len));
	assert_null(name);
	assert_ptr_equal(p, str); /* input data not eaten */
	logbuf_assert("Document Type Declaration not supported. Line number 1.");

	/* invalid XML */
	str = p = "<!NONSENCE/>";
	assert_int_equal(LY_EVALID, lyxml_get_element(&ctx, &str, &prefix, &prefix_len, &name, &name_len));
	assert_null(name);
	assert_ptr_equal(p, str); /* input data not eaten */
	logbuf_assert("Unknown XML section \"<!NONSENCE/>\". Line number 1.");

	/* unqualified element */
	str = " < element/>";
	assert_int_equal(LY_SUCCESS, lyxml_get_element(&ctx, &str, &prefix, &prefix_len, &name, &name_len));
	assert_null(prefix);
	assert_false(strncmp("element", name, name_len));
	assert_int_equal(7, name_len);
	assert_int_equal(LYXML_ELEMENT, ctx.status);
	assert_string_equal("", str);
	assert_int_equal(0, ctx.elements.count);

	str = " < element attr=\'x\'/>";
	assert_int_equal(LY_SUCCESS, lyxml_get_element(&ctx, &str, &prefix, &prefix_len, &name, &name_len));
	assert_int_equal(LYXML_ATTRIBUTE, ctx.status);
	assert_string_equal("attr=\'x\'/>", str);
	assert_int_equal(1, ctx.elements.count);
	assert_int_equal(LY_SUCCESS, lyxml_get_attribute(&ctx, &str, &prefix, &prefix_len, &name, &name_len));
	assert_int_equal(LYXML_ATTR_CONTENT, ctx.status);
	assert_string_equal("\'x\'/>", str);
	assert_int_equal(1, ctx.elements.count);
	assert_int_equal(LY_SUCCESS, lyxml_get_string(&ctx, &str, &buf, &buf_len, &out, &len, &dynamic));
	assert_int_equal(LYXML_ELEMENT, ctx.status);
	assert_string_equal("", str);
	assert_int_equal(0, ctx.elements.count);

	str = "<?xml version=\"1.0\"?> <!-- comment --> <![CDATA[<greeting>Hello, world!</greeting>]]> <?TEST xxx?> <element/>";
	assert_int_equal(LY_SUCCESS, lyxml_get_element(&ctx, &str, &prefix, &prefix_len, &name, &name_len));
	assert_null(prefix);
	assert_false(strncmp("element", name, name_len));
	assert_int_equal(7, name_len);
	assert_int_equal(LYXML_ELEMENT, ctx.status);
	assert_string_equal("", str);

	str = "<element xmlns=\"urn\"></element>";
	assert_int_equal(LY_SUCCESS, lyxml_get_element(&ctx, &str, &prefix, &prefix_len, &name, &name_len));
	assert_null(prefix);
	assert_false(strncmp("element", name, name_len));
	assert_int_equal(7, name_len);
	assert_int_equal(LYXML_ATTRIBUTE, ctx.status);
	assert_string_equal("xmlns=\"urn\"></element>", str);
	/* cleean context by getting closing tag */
	str += 12;
	assert_int_equal(LY_SUCCESS, lyxml_get_element(&ctx, &str, &prefix, &prefix_len, &name, &name_len));

	/* qualified element */
	str = " < yin:element/>";
	assert_int_equal(LY_SUCCESS, lyxml_get_element(&ctx, &str, &prefix, &prefix_len, &name, &name_len));
	assert_false(strncmp("yin", prefix, prefix_len));
	assert_false(strncmp("element", name, name_len));
	assert_int_equal(3, prefix_len);
	assert_int_equal(7, name_len);
	assert_int_equal(LYXML_ELEMENT, ctx.status);
	assert_string_equal("", str);

	str = "<yin:element xmlns=\"urn\"></element>";
	assert_int_equal(LY_SUCCESS, lyxml_get_element(&ctx, &str, &prefix, &prefix_len, &name, &name_len));
	assert_false(strncmp("yin", prefix, prefix_len));
	assert_false(strncmp("element", name, name_len));
	assert_int_equal(3, prefix_len);
	assert_int_equal(7, name_len);
	assert_int_equal(LYXML_ATTRIBUTE, ctx.status);
	assert_string_equal("xmlns=\"urn\"></element>", str);
	/* cleean context by getting closing tag */
	str += 12;
	assert_int_equal(LY_EVALID, lyxml_get_element(&ctx, &str, &prefix, &prefix_len, &name, &name_len));
	logbuf_assert("Opening and closing elements tag missmatch (\"element>\"). Line number 1.");
	str = "</yin:element/>";
	assert_int_equal(LY_EVALID, lyxml_get_element(&ctx, &str, &prefix, &prefix_len, &name, &name_len));
	logbuf_assert("Unexpected data \"/>\" in closing element tag. Line number 1.");
	lyxml_context_clear(&ctx);

	/* UTF8 characters */
	str = "<𠜎€𠜎Øn:𠜎€𠜎Øn/>";
	assert_int_equal(LY_SUCCESS, lyxml_get_element(&ctx, &str, &prefix, &prefix_len, &name, &name_len));
	assert_false(strncmp("𠜎€𠜎Øn", prefix, prefix_len));
	assert_false(strncmp("𠜎€𠜎Øn", name, name_len));
	assert_int_equal(14, prefix_len);
	assert_int_equal(14, name_len);
	assert_int_equal(LYXML_ELEMENT, ctx.status);
	assert_string_equal("", str);

	/* invalid UTF-8 character */
	str = "<¢:element>";
	assert_int_equal(LY_EVALID, lyxml_get_element(&ctx, &str, &prefix, &prefix_len, &name, &name_len));
	logbuf_assert("Identifier \"¢:element>\" starts with invalid character. Line number 1.");
	str = "<yin:c⁐element>";
	assert_int_equal(LY_EVALID, lyxml_get_element(&ctx, &str, &prefix, &prefix_len, &name, &name_len));
	logbuf_assert("Invalid character sequence \"⁐element>\", expected whitespace or element tag termination ('>' or '/>'. Line number 1.");
	}

	static void
	test_attribute(void **state)
	{
	(void) state; /* unused */

	size_t name_len, prefix_len;
	const char name, prefix;
	const char str, p;

	struct lyxml_context ctx;
	memset(&ctx, 0, sizeof ctx);
	ctx.line = 1;

	/* empty - without element tag termination */
	str = "";
	assert_int_equal(LY_EINVAL, lyxml_get_attribute(&ctx, &str, &prefix, &prefix_len, &name, &name_len));

	/* not an attribute */
	str = p = "unknown/>";
	assert_int_equal(LY_EVALID, lyxml_get_attribute(&ctx, &str, &prefix, &prefix_len, &name, &name_len));
	assert_ptr_equal(p, str); /* input data not eaten */
	logbuf_assert("Invalid character sequence \"/>\", expected whitespace or '='. Line number 1.");
	str = p = "unknown />";
	assert_int_equal(LY_EVALID, lyxml_get_attribute(&ctx, &str, &prefix, &prefix_len, &name, &name_len));
	assert_ptr_equal(p, str); /* input data not eaten */
	logbuf_assert("Invalid character sequence \"/>\", expected '='. Line number 1.");
	str = p = "xxx=/>";
	assert_int_equal(LY_EVALID, lyxml_get_attribute(&ctx, &str, &prefix, &prefix_len, &name, &name_len));
	assert_ptr_equal(p, str); /* input data not eaten */
	logbuf_assert("Invalid character sequence \"/>\", expected either single or double quotation mark. Line number 1.");
	str = p = "xxx\n = yyy/>";
	assert_int_equal(LY_EVALID, lyxml_get_attribute(&ctx, &str, &prefix, &prefix_len, &name, &name_len));
	assert_ptr_equal(p, str); /* input data not eaten */
	logbuf_assert("Invalid character sequence \"yyy/>\", expected either single or double quotation mark. Line number 2.");

	/* valid attribute */
	str = "xmlns=\"urn\">";
	assert_int_equal(LY_SUCCESS, lyxml_get_attribute(&ctx, &str, &prefix, &prefix_len, &name, &name_len));
	assert_non_null(name);
	assert_null(prefix);
	assert_int_equal(5, name_len);
	assert_int_equal(0, prefix_len);
	assert_false(strncmp("xmlns", name, name_len));
	assert_string_equal("\"urn\">", str);
	assert_int_equal(LYXML_ATTR_CONTENT, ctx.status);

	str = "xmlns:nc\n = \'urn\'/>";
	assert_int_equal(LY_SUCCESS, lyxml_get_attribute(&ctx, &str, &prefix, &prefix_len, &name, &name_len));
	assert_non_null(name);
	assert_non_null(prefix);
	assert_int_equal(2, name_len);
	assert_int_equal(5, prefix_len);
	assert_int_equal(3, ctx.line);
	assert_false(strncmp("xmlns", prefix, prefix_len));
	assert_false(strncmp("nc", name, name_len));
	assert_string_equal("\'urn\'/>", str);
	assert_int_equal(LYXML_ATTR_CONTENT, ctx.status);

	}

	static void
	test_text(void **state)
	{
	(void) state; /* unused */

	size_t buf_len, len;
	int dynamic;
	const char str, p;
	char buf = NULL, out = NULL;

	struct lyxml_context ctx;
	memset(&ctx, 0, sizeof ctx);
	ctx.line = 1;

	/* empty attribute value */
	ctx.status = LYXML_ATTR_CONTENT;
	str = "\"\"";
	assert_int_equal(LY_SUCCESS, lyxml_get_string(&ctx, &str, &buf, &buf_len, &out, &len, &dynamic));
	assert_null(buf);
	assert_ptr_equal(&str[-1], out);
	assert_int_equal(0, dynamic);
	assert_int_equal(0, len);
	assert_true(str[0] == '\0'); /* everything eaten */
	assert_int_equal(LYXML_ATTRIBUTE, ctx.status);

	ctx.status = LYXML_ATTR_CONTENT;
	str = "\'\'";
	assert_int_equal(LY_SUCCESS, lyxml_get_string(&ctx, &str, &buf, &buf_len, &out, &len, &dynamic));
	assert_null(buf);
	assert_ptr_equal(&str[-1], out);
	assert_int_equal(0, dynamic);
	assert_int_equal(0, len);
	assert_true(str[0] == '\0'); /* everything eaten */
	assert_int_equal(LYXML_ATTRIBUTE, ctx.status);

	/* empty element content - only formating before defining child */
	ctx.status = LYXML_ELEM_CONTENT;
	str = "\n <";
	assert_int_equal(LY_EINVAL, lyxml_get_string(&ctx, &str, &buf, &buf_len, &out, &len, &dynamic));
	assert_null(buf);
	assert_string_equal("<", str);

	/* empty element content is invalid - missing content terminating character < */
	ctx.status = LYXML_ELEM_CONTENT;
	str = "";
	assert_int_equal(LY_EVALID, lyxml_get_string(&ctx, &str, &buf, &buf_len, &out, &len, &dynamic));
	assert_null(buf);
	logbuf_assert("Unexpected end-of-file. Line number 2.");

	ctx.status = LYXML_ELEM_CONTENT;
	str = p = "xxx";
	assert_int_equal(LY_EVALID, lyxml_get_string(&ctx, &str, &buf, &buf_len, &out, &len, &dynamic));
	assert_null(buf);
	logbuf_assert("Unexpected end-of-file. Line number 2.");
	assert_ptr_equal(p, str); /* input data not eaten */

	/* valid strings */
	ctx.status = LYXML_ELEM_CONTENT;
	str = "€𠜎Øn \n<&"'> ROK<";
	assert_int_equal(LY_SUCCESS, lyxml_get_string(&ctx, &str, &buf, &buf_len, &out, &len, &dynamic));
	assert_int_not_equal(0, dynamic);
	assert_non_null(buf);
	assert_ptr_equal(out, buf);
	assert_int_equal(22, buf_len);
	assert_int_equal(21, len);
	assert_string_equal("€𠜎Øn \n<&\"\'> ROK", buf);
	assert_string_equal("<", str);
	assert_int_equal(LYXML_ELEMENT, ctx.status);

	/* test using n-bytes UTF8 hexadecimal code points */
	ctx.status = LYXML_ATTR_CONTENT;
	str = "\'$¢€𐍈\'";
	assert_int_equal(LY_SUCCESS, lyxml_get_string(&ctx, &str, &buf, &buf_len, &out, &len, &dynamic));
	assert_int_not_equal(0, dynamic);
	assert_non_null(buf);
	assert_ptr_equal(out, buf);
	assert_int_equal(22, buf_len);
	assert_int_equal(10, len);
	assert_string_equal("$¢€𐍈", buf);
	assert_int_equal(LYXML_ATTRIBUTE, ctx.status);

	free(buf);
	buf = NULL;

	/* invalid characters in string */
	ctx.status = LYXML_ATTR_CONTENT;
	str = p = "\'&#x52\'";
	assert_int_equal(LY_EVALID, lyxml_get_string(&ctx, &str, &buf, &buf_len, &out, &len, &dynamic));
	logbuf_assert("Invalid character sequence \"'\", expected ;. Line number 3.");
	assert_null(buf);
	assert_ptr_equal(p, str); /* input data not eaten */
	ctx.status = LYXML_ATTR_CONTENT;
	str = p = "\"&#82\"";
	assert_int_equal(LY_EVALID, lyxml_get_string(&ctx, &str, &buf, &buf_len, &out, &len, &dynamic));
	logbuf_assert("Invalid character sequence \"\"\", expected ;. Line number 3.");
	assert_null(buf);
	assert_ptr_equal(p, str); /* input data not eaten */
	ctx.status = LYXML_ATTR_CONTENT;
	str = p = "\"&nonsence;\"";
	assert_int_equal(LY_EVALID, lyxml_get_string(&ctx, &str, &buf, &buf_len, &out, &len, &dynamic));
	logbuf_assert("Entity reference \"&nonsence;\" not supported, only predefined references allowed. Line number 3.");
	assert_null(buf);
	assert_ptr_equal(p, str); /* input data not eaten */
	ctx.status = LYXML_ELEM_CONTENT;
	str = p = "&#o122;";
	assert_int_equal(LY_EVALID, lyxml_get_string(&ctx, &str, &buf, &buf_len, &out, &len, &dynamic));
	logbuf_assert("Invalid character reference \"&#o122;\". Line number 3.");
	assert_null(buf);
	assert_ptr_equal(p, str); /* input data not eaten */

	ctx.status = LYXML_ATTR_CONTENT;
	str = p = "\'\'";
	assert_int_equal(LY_EVALID, lyxml_get_string(&ctx, &str, &buf, &buf_len, &out, &len, &dynamic));
	logbuf_assert("Invalid character reference \"\'\" (0x00000006). Line number 3.");
	assert_null(buf);
	assert_ptr_equal(p, str); /* input data not eaten */
	ctx.status = LYXML_ATTR_CONTENT;
	str = p = "\'﷐\'";
	assert_int_equal(LY_EVALID, lyxml_get_string(&ctx, &str, &buf, &buf_len, &out, &len, &dynamic));
	logbuf_assert("Invalid character reference \"﷐\'\" (0x0000fdd0). Line number 3.");
	assert_null(buf);
	assert_ptr_equal(p, str); /* input data not eaten */
	ctx.status = LYXML_ATTR_CONTENT;
	str = p = "\'\'";
	assert_int_equal(LY_EVALID, lyxml_get_string(&ctx, &str, &buf, &buf_len, &out, &len, &dynamic));
	logbuf_assert("Invalid character reference \"\'\" (0x0000ffff). Line number 3.");
	assert_null(buf);
	assert_ptr_equal(p, str); /* input data not eaten */
	}

	static void
	test_ns(void **state)
	{
	(void) state; /* unused */

	const char e1, e2;
	const struct lyxml_ns *ns;

	struct lyxml_context ctx;
	memset(&ctx, 0, sizeof ctx);
	ctx.line = 1;

	e1 = "element1";
	e2 = "element2";
	/* simulate adding open element1 into context */
	ctx.elements.count++;
	/* processing namespace definitions */
	assert_int_equal(LY_SUCCESS, lyxml_ns_add(&ctx, e1, NULL, 0, strdup("urn:default")));
	assert_int_equal(LY_SUCCESS, lyxml_ns_add(&ctx, e1, "nc", 2, strdup("urn:nc1")));
	/* simulate adding open element2 into context */
	ctx.elements.count++;
	/* processing namespace definitions */
	assert_int_equal(LY_SUCCESS, lyxml_ns_add(&ctx, e2, "nc", 2, strdup("urn:nc2")));
	assert_int_equal(3, ctx.ns.count);
	assert_int_not_equal(0, ctx.ns.size);

	ns = lyxml_ns_get(&ctx, NULL, 0);
	assert_non_null(ns);
	assert_null(ns->prefix);
	assert_string_equal("urn:default", ns->uri);

	ns = lyxml_ns_get(&ctx, "nc", 2);
	assert_non_null(ns);
	assert_string_equal("nc", ns->prefix);
	assert_string_equal("urn:nc2", ns->uri);

	/* simulate closing element2 */
	ctx.elements.count--;
	assert_int_equal(LY_SUCCESS, lyxml_ns_rm(&ctx, e2));
	assert_int_equal(2, ctx.ns.count);

	ns = lyxml_ns_get(&ctx, "nc", 2);
	assert_non_null(ns);
	assert_string_equal("nc", ns->prefix);
	assert_string_equal("urn:nc1", ns->uri);

	/* simulate closing element1 */
	ctx.elements.count--;
	assert_int_equal(LY_SUCCESS, lyxml_ns_rm(&ctx, e1));
	assert_int_equal(0, ctx.ns.count);

	assert_null(lyxml_ns_get(&ctx, "nc", 2));
	assert_null(lyxml_ns_get(&ctx, NULL, 0));
	}

	static void
	test_ns2(void **state)
	{
	(void) state; /* unused */

	const char e1, e2;

	struct lyxml_context ctx;
	memset(&ctx, 0, sizeof ctx);
	ctx.line = 1;

	/* parent element has the same name as its child (and for some reason both names are stored at the same place) */
	e1 = e2 = "element1";
	/* simulate adding open element1 into context */
	ctx.elements.count++;
	/* default namespace defined in parent element1 */
	assert_int_equal(LY_SUCCESS, lyxml_ns_add(&ctx, e1, NULL, 0, strdup("urn:default")));
	assert_int_equal(1, ctx.ns.count);
	/* going into child element1 */
	e1 = e2;
	/* simulate adding open element1 into context */
	ctx.elements.count++;
	/* no namespace defined, going out (first, simulate closing of so far open element) */
	ctx.elements.count--;
	assert_int_equal(LY_SUCCESS, lyxml_ns_rm(&ctx, e2));
	assert_int_equal(1, ctx.ns.count);
	/* nothing else, going out of the parent element1 (first, simulate closing of so far open element) */
	ctx.elements.count--;
	assert_int_equal(LY_SUCCESS, lyxml_ns_rm(&ctx, e1));
	assert_int_equal(0, ctx.ns.count);
	}

	int main(void)
	{
	const struct CMUnitTest tests[] = {
	cmocka_unit_test_setup(test_element, logger_setup),
	cmocka_unit_test_setup(test_attribute, logger_setup),
	cmocka_unit_test_setup(test_text, logger_setup),
	cmocka_unit_test_setup(test_ns, logger_setup),
	cmocka_unit_test_setup(test_ns2, logger_setup),
	};

	return cmocka_run_group_tests(tests, NULL, NULL);
	}