posix: c_lib_ext: fnmatch: added test coverage cases to cover POSIX clases

Added tests for isprint, ispunct, islower and other posix classes

Signed-off-by: Harun Spago <harun.spago.code@gmail.com>

Author: Spago123

tests/posix/c_lib_ext/src/fnmatch.c

@@ -13,8 +13,6 @@
  */
 ZTEST(posix_c_lib_ext, test_fnmatch)
 {
-	/* Note: commented out lines indicate known problems to be addressed in #55186 */
-
 	zassert_ok(fnmatch("*.c", "foo.c", 0));
 	zassert_ok(fnmatch("*.c", ".c", 0));
 	zassert_equal(fnmatch("*.a", "foo.c", 0), FNM_NOMATCH);
@@ -73,11 +71,26 @@ ZTEST(posix_c_lib_ext, test_fnmatch)
 	zassert_equal(fnmatch("*/*", "a/.b", FNM_PATHNAME | FNM_PERIOD), FNM_NOMATCH);
 	zassert_ok(fnmatch("*?*/*", "a/.b", FNM_PERIOD));
 	zassert_ok(fnmatch("*[.]/b", "a./b", FNM_PATHNAME | FNM_PERIOD));
-	/* zassert_ok(fnmatch("*[[:alpha:]]/""*[[:alnum:]]", "a/b", FNM_PATHNAME)); */
+	/** Test cases for POSIX classes */
+	zassert_ok(fnmatch("*[[:alpha:]]", "Z", 0));
+	zassert_ok(fnmatch("*[[:digit:]]", "7", 0));
+	zassert_ok(fnmatch("*[[:alnum:]]", "X9", 0));
+	zassert_ok(fnmatch("*[[:lower:]]", "z", 0));
+	zassert_ok(fnmatch("*[[:upper:]]", "G", 0));
+	zassert_ok(fnmatch("*[[:space:]]", " ", 0));
+	zassert_ok(fnmatch("*[[:alpha:]]/"
+			   "*[[:alnum:]]",
+			   "a/b", FNM_PATHNAME));
 	zassert_not_equal(fnmatch("*[![:digit:]]*/[![:d-d]", "a/b", FNM_PATHNAME), 0);
 	zassert_not_equal(fnmatch("*[![:digit:]]*/[[:d-d]", "a/[", FNM_PATHNAME), 0);
 	zassert_not_equal(fnmatch("*[![:digit:]]*/[![:d-d]", "a/[", FNM_PATHNAME), 0);
+	zassert_ok(fnmatch("file[0-9].txt", "file3.txt", 0));
+	zassert_ok(fnmatch("dir/*", "dir/file", FNM_PATHNAME));
+	zassert_equal(fnmatch("dir/*", "dir/sub/file", FNM_PATHNAME), FNM_NOMATCH);
 	zassert_ok(fnmatch("a?b", "a.b", FNM_PATHNAME | FNM_PERIOD));
 	zassert_ok(fnmatch("a*b", "a.b", FNM_PATHNAME | FNM_PERIOD));
 	zassert_ok(fnmatch("a[.]b", "a.b", FNM_PATHNAME | FNM_PERIOD));
+	zassert_ok(fnmatch("*[[:alpha:]]", "Z", 0));
+	zassert_equal(fnmatch("[[:foobarbaz:]]", "Z", 0), FNM_NOMATCH);
+	zassert_ok(fnmatch("*[[:alpha:]]", "Z", 0));
 }