tests CHANGE initial test for YANG parser
diff --git a/tests/src/test_parser_yang.c b/tests/src/test_parser_yang.c
new file mode 100644
index 0000000..0a14116
--- /dev/null
+++ b/tests/src/test_parser_yang.c
@@ -0,0 +1,101 @@
+/*
+ * @file test_parser_yang.c
+ * @author: Radek Krejci <rkrejci@cesnet.cz>
+ * @brief unit tests for functions from parser_yang.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
+ */
+
+#define _BSD_SOURCE
+#define _DEFAULT_SOURCE
+#include <stdarg.h>
+#include <stddef.h>
+#include <setjmp.h>
+#include <cmocka.h>
+
+#include <stdio.h>
+#include <string.h>
+
+#include "libyang.h"
+#include "../../src/parser_yang.c"
+
+#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_comments(void **state)
+{
+ (void) state; /* unused */
+
+ const char *str, *p;
+
+ str = " this is a text of / one * line */ comment\nx";
+ assert_int_equal(LY_SUCCESS, skip_comment(NULL, &str, 1));
+ assert_string_equal("x", str);
+
+ str = " this is a \n * text // of / block * comment */x";
+ assert_int_equal(LY_SUCCESS, skip_comment(NULL, &str, 2));
+ assert_string_equal("x", str);
+
+ str = p = " this is one line comment on last line";
+ assert_int_equal(LY_SUCCESS, skip_comment(NULL, &str, 1));
+ assert_true(str[0] == '\0');
+
+ str = p = " this is a not terminated comment x";
+ assert_int_equal(LY_EVALID, skip_comment(NULL, &str, 2));
+ logbuf_assert("Unexpected end-of-file, non-terminated comment.");
+ assert_true(str[0] == '\0');
+}
+
+int main(void)
+{
+ const struct CMUnitTest tests[] = {
+ cmocka_unit_test_setup(test_comments, logger_setup),
+ };
+
+ return cmocka_run_group_tests(tests, NULL, NULL);
+}