rpc, test: Add EnsureUniqueWalletName tests

Co-authored-by: stickies-v <[email protected]>

Author: pablomartin4btc

src/wallet/test/CMakeLists.txt

@@ -19,6 +19,7 @@ target_sources(test_bitcoin
     scriptpubkeyman_tests.cpp
     spend_tests.cpp
     wallet_crypto_tests.cpp
+    wallet_rpc_tests.cpp
     wallet_tests.cpp
     wallet_transaction_tests.cpp
     walletdb_tests.cpp

src/wallet/test/wallet_rpc_tests.cpp

@@ -0,0 +1,41 @@
+// Copyright (c) 2025-present The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#include <rpc/request.h>
+#include <test/util/setup_common.h>
+#include <univalue.h>
+#include <wallet/rpc/util.h>
+
+#include <boost/test/unit_test.hpp>
+
+#include <optional>
+#include <string>
+
+namespace wallet {
+static std::string TestWalletName(const std::string& endpoint, std::optional<std::string> parameter = std::nullopt)
+{
+    JSONRPCRequest req;
+    req.URI = endpoint;
+    return EnsureUniqueWalletName(req, parameter ? &*parameter : nullptr);
+}
+
+BOOST_FIXTURE_TEST_SUITE(wallet_rpc_tests, BasicTestingSetup)
+
+BOOST_AUTO_TEST_CASE(ensure_unique_wallet_name)
+{
+    // EnsureUniqueWalletName should only return if exactly one unique wallet name is provided
+    BOOST_CHECK_EQUAL(TestWalletName("/wallet/foo"), "foo");
+    BOOST_CHECK_EQUAL(TestWalletName("/wallet/foo", "foo"), "foo");
+    BOOST_CHECK_EQUAL(TestWalletName("/", "foo"), "foo");
+    BOOST_CHECK_EQUAL(TestWalletName("/bar", "foo"), "foo");
+
+    BOOST_CHECK_THROW(TestWalletName("/"), UniValue);
+    BOOST_CHECK_THROW(TestWalletName("/foo"), UniValue);
+    BOOST_CHECK_THROW(TestWalletName("/wallet/foo", "bar"), UniValue);
+    BOOST_CHECK_THROW(TestWalletName("/wallet/foo", "foobar"), UniValue);
+    BOOST_CHECK_THROW(TestWalletName("/wallet/foobar", "foo"), UniValue);
+}
+
+BOOST_AUTO_TEST_SUITE_END()
+} // namespace wallet