build, test: Build db_tests.cpp regardless of USE_BDB

While some tests are specific to BDB, `db_tests` as a whole are not
limited to BDB.

Author: hebasto

src/wallet/test/CMakeLists.txt

@@ -8,6 +8,7 @@ target_sources(test_bitcoin
   PRIVATE
     init_test_fixture.cpp
     wallet_test_fixture.cpp
+    db_tests.cpp
     coinselector_tests.cpp
     feebumper_tests.cpp
     group_outputs_tests.cpp
@@ -22,10 +23,4 @@ target_sources(test_bitcoin
     walletdb_tests.cpp
     walletload_tests.cpp
 )
-if(USE_BDB)
-  target_sources(test_bitcoin
-    PRIVATE
-      db_tests.cpp
-  )
-endif()
 target_link_libraries(test_bitcoin bitcoin_wallet)

src/wallet/test/db_tests.cpp

@@ -62,6 +62,7 @@ static void CheckPrefix(DatabaseBatch& batch, Span<const std::byte> prefix, Mock
 
 BOOST_FIXTURE_TEST_SUITE(db_tests, BasicTestingSetup)
 
+#ifdef USE_BDB
 static std::shared_ptr<BerkeleyEnvironment> GetWalletEnv(const fs::path& path, fs::path& database_filename)
 {
     fs::path data_file = BDBDataFile(path);
@@ -124,6 +125,7 @@ BOOST_AUTO_TEST_CASE(getwalletenv_g_dbenvs_free_instance)
     BOOST_CHECK(env_1_a != env_1_b);
     BOOST_CHECK(env_2_a == env_2_b);
 }
+#endif
 
 static std::vector<std::unique_ptr<WalletDatabase>> TestDatabases(const fs::path& path_root)
 {