1 files changed, 75 insertions, 0 deletions
diff --git a/src/test/common_url_tests.cpp b/src/test/common_url_tests.cpp
new file mode 100644
index 0000000000..065c7d97bc
--- /dev/null
+++ b/src/test/common_url_tests.cpp
@@ -0,0 +1,75 @@
+// Copyright (c) 2024-present The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or https://opensource.org/license/mit/.
+
+#include <common/url.h>
+
+#include <string>
+
+#include <boost/test/unit_test.hpp>
+
+BOOST_AUTO_TEST_SUITE(common_url_tests)
+
+// These test vectors were ported from test/regress.c in the libevent library
+// which used to be a dependency of the UrlDecode function.
+
+BOOST_AUTO_TEST_CASE(encode_decode_test) {
+    BOOST_CHECK_EQUAL(UrlDecode("Hello"), "Hello");
+    BOOST_CHECK_EQUAL(UrlDecode("99"), "99");
+    BOOST_CHECK_EQUAL(UrlDecode(""), "");
+    BOOST_CHECK_EQUAL(UrlDecode("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ123456789-.~_"),
+                      "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ123456789-.~_");
+    BOOST_CHECK_EQUAL(UrlDecode("%20"), " ");
+    BOOST_CHECK_EQUAL(UrlDecode("%FF%F0%E0"), "\xff\xf0\xe0");
+    BOOST_CHECK_EQUAL(UrlDecode("%01%19"), "\x01\x19");
+    BOOST_CHECK_EQUAL(UrlDecode("http%3A%2F%2Fwww.ietf.org%2Frfc%2Frfc3986.txt"),
+                      "http://www.ietf.org/rfc/rfc3986.txt");
+    BOOST_CHECK_EQUAL(UrlDecode("1%2B2%3D3"), "1+2=3");
+}
+
+BOOST_AUTO_TEST_CASE(decode_malformed_test) {
+    BOOST_CHECK_EQUAL(UrlDecode("%%xhello th+ere \xff"), "%%xhello th+ere \xff");
+
+    BOOST_CHECK_EQUAL(UrlDecode("%"), "%");
+    BOOST_CHECK_EQUAL(UrlDecode("%%"), "%%");
+    BOOST_CHECK_EQUAL(UrlDecode("%%%"), "%%%");
+    BOOST_CHECK_EQUAL(UrlDecode("%%%%"), "%%%%");
+
+    BOOST_CHECK_EQUAL(UrlDecode("+"), "+");
+    BOOST_CHECK_EQUAL(UrlDecode("++"), "++");
+
+    BOOST_CHECK_EQUAL(UrlDecode("?"), "?");
+    BOOST_CHECK_EQUAL(UrlDecode("??"), "??");
+
+    BOOST_CHECK_EQUAL(UrlDecode("%G1"), "%G1");
+    BOOST_CHECK_EQUAL(UrlDecode("%2"), "%2");
+    BOOST_CHECK_EQUAL(UrlDecode("%ZX"), "%ZX");
+
+    BOOST_CHECK_EQUAL(UrlDecode("valid%20string%G1"), "valid string%G1");
+    BOOST_CHECK_EQUAL(UrlDecode("%20invalid%ZX"), " invalid%ZX");
+    BOOST_CHECK_EQUAL(UrlDecode("%20%G1%ZX"), " %G1%ZX");
+
+    BOOST_CHECK_EQUAL(UrlDecode("%1 "), "%1 ");
+    BOOST_CHECK_EQUAL(UrlDecode("% 9"), "% 9");
+    BOOST_CHECK_EQUAL(UrlDecode(" %Z "), " %Z ");
+    BOOST_CHECK_EQUAL(UrlDecode(" % X"), " % X");
+
+    BOOST_CHECK_EQUAL(UrlDecode("%%ffg"), "%\xffg");
+    BOOST_CHECK_EQUAL(UrlDecode("%fg"), "%fg");
+
+    BOOST_CHECK_EQUAL(UrlDecode("%-1"), "%-1");
+    BOOST_CHECK_EQUAL(UrlDecode("%1-"), "%1-");
+}
+
+BOOST_AUTO_TEST_CASE(decode_lowercase_hex_test) {
+    BOOST_CHECK_EQUAL(UrlDecode("%f0%a0%b0"), "\xf0\xa0\xb0");
+}
+
+BOOST_AUTO_TEST_CASE(decode_internal_nulls_test) {
+    std::string result1{"\0\0x\0\0", 5};
+    BOOST_CHECK_EQUAL(UrlDecode("%00%00x%00%00"), result1);
+    std::string result2{"abc\0\0", 5};
+    BOOST_CHECK_EQUAL(UrlDecode("abc%00%00"), result2);
+}
+
+BOOST_AUTO_TEST_SUITE_END()