tests: added unit test for JSON escaping

tests/Makefile.am

@@ -30,20 +30,23 @@ AM_CPPFLAGS = \
 kkdcp_parsing_SOURCES = ../src/config-kkdcp.c kkdcp-parsing.c
 kkdcp_parsing_LDADD = ../gl/libgnu.a $(LIBTALLOC_LIBS)
 
+json_escape_SOURCES = ../src/common-json.c json-escape.c
+json_escape_LDADD = ../gl/libgnu.a $(LIBTALLOC_LIBS)
+
 ipv4_prefix_SOURCES = ../src/common.c ../src/common.h ipv4-prefix.c
 ipv4_prefix_LDADD = ../gl/libgnu.a $(LIBTALLOC_LIBS)
 
 ipv6_prefix_SOURCES = ../src/common.c ../src/common.h ipv6-prefix.c
 ipv6_prefix_LDADD = ../gl/libgnu.a $(LIBTALLOC_LIBS)
 
-check_PROGRAMS = ipv4-prefix ipv6-prefix kkdcp-parsing
+check_PROGRAMS = ipv4-prefix ipv6-prefix kkdcp-parsing json-escape
 
 TESTS = test-pass test-pass-cert test-cert test-iroute test-pass-script \
 	test-multi-cookie full-test test-group-pass test-pass-group-cert \
 	ocpasswd-test test-pass-group-cert-no-pass unix-test test-pass-opt-cert \
 	test-cookie-timeout test-cookie-timeout-2 test-explicit-ip radius-test \
 	test-gssapi kerberos-test pam-test test-ban test-sighup ipv4-prefix \
-	radius-test-config kkdcp-parsing
+	radius-test-config kkdcp-parsing json-escape
 
 TESTS_ENVIRONMENT = srcdir="$(srcdir)" \
 	top_builddir="$(top_builddir)"

tests/json-escape.c

@@ -0,0 +1,63 @@
+/*
+ * Copyright (C) 2015 Red Hat, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <config.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netdb.h>
+#include "../src/common-json.h"
+
+static char *strings[] = 
+{
+	"hello there",
+	"hi bro\n",
+	"small ascii\x10\x01\x03\x04\x18\x20\x21\x1f end",
+	"try to escape \"quotes",
+	"try to escape \\escapes",
+	"\tbig pile  \b\b of stuff\r\n"
+};
+
+static char *encoded_strings[] = 
+{
+	"hello there",
+	"hi bro\\u000a",
+	"small ascii\\u0010\\u0001\\u0003\\u0004\\u0018 !\\u001f end",
+	"try to escape \\\"quotes",
+	"try to escape \\\\escapes",
+	"\\u0009big pile  \\u0008\\u0008 of stuff\\u000d\\u000a"
+};
+
+int main()
+{
+	char tmp[512];
+	char *p;
+	unsigned i;
+
+	for (i=0;i<sizeof(strings)/sizeof(strings[0]);i++) {
+		tmp[0] = 0;
+		p = json_escape_val(tmp, sizeof(tmp), strings[i]);
+		if (strcmp(p, encoded_strings[i]) != 0) {
+			fprintf(stderr, "string %d, fails encoding:\n\tinput: '%s'\n\toutput: '%s'\n", i, strings[i], p);
+			exit(1);
+		}
+	}
+	return 0;
+}