test_string_noalloc: New test for json_object_new_string_noalloc().

This is a short test to make sure the json_object_new_string_noalloc()
function works as expected.

tests/CMakeLists.txt

@@ -32,6 +32,7 @@ foreach(TESTNAME
 	test_printbuf
 	test_set_serializer
 	test_set_value
+	test_string_noalloc
 	test_util_file
 	test_visit
 	test_object_iterator)

tests/test_string_noalloc.c

@@ -0,0 +1,81 @@
+/*
+ * Tests if binary strings are supported.
+ */
+
+#include "config.h"
+#include <assert.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "json_object.h"
+#include "json_object_private.h"
+
+int main(void)
+{
+	/* this test has a space after the null character. check that it's still included */
+	char *str = strdup("This string should be longer than 32 characters");
+	struct json_object *jso_str = NULL;
+	int retval = 0;
+
+	if (!str)
+	{
+		puts("FAIL: strdup() returned NULL");
+		retval = 1;
+		goto exit;
+	}
+
+	jso_str = json_object_new_string_noalloc(str);
+
+	if (!jso_str)
+	{
+		puts("FAIL: json_object_new_string_noalloc(str) returned NULL");
+		retval = 2;
+		goto exit;
+	}
+	if (str != json_object_get_string(jso_str))
+	{
+		puts("FAIL: json_object_new_string_noalloc(str) did not own the buffer.");
+		retval = 3;
+		goto exit;
+	}
+
+	json_object_put(jso_str);
+
+	str = strdup("this string is short");
+	if (!str)
+	{
+		puts("FAIL: strdup() returned NULL");
+		retval = 4;
+		goto exit;
+	}
+
+	jso_str = json_object_new_string_noalloc(str);
+
+	if (!jso_str)
+	{
+		puts("FAIL: json_object_new_string_noalloc(str) returned NULL");
+		retval = 5;
+		goto exit;
+	}
+	if (str == json_object_get_string(jso_str))
+	{
+		puts("FAIL: json_object_new_string_noalloc(str) owns the pointer instead using the internal buffer.");
+		retval = 6;
+		goto exit;
+	}
+	if (json_object_get_string(jso_str) != jso_str->o.c_string.str.data)
+	{
+		puts("FAIL: json_object_new_string_noalloc(str) does not use the internal buffer.");
+		free(str);
+		retval = 7;
+		goto exit;
+	}
+
+	puts("PASS");
+
+exit:
+	if (jso_str)
+		json_object_put(jso_str);
+	return retval;
+}

tests/test_string_noalloc.expected

@@ -0,0 +1 @@
+PASS

tests/test_string_noalloc.test

@@ -0,0 +1 @@
+test_basic.test