Merge #18923: wallet: Never schedule MaybeCompactWalletDB when -flushwallet is off

fa73493930 refactor: Use C++11 range-based for loop (MarcoFalke)
fa7b164d62 wallet: Never schedule MaybeCompactWalletDB when -flushwallet is off (MarcoFalke)
faf8401c19 wallet: Pass unused args to StartWallets (MarcoFalke)
fa6c186436 gui tests: Limit life-time of dummy testing setup (MarcoFalke)
fa28a61897 test: Add smoke test to check that wallets are flushed by default (MarcoFalke)

Pull request description:

  User-facing, this is a refactor. Internally, the scheduler does not have to call a mostly empty function every half a second.

ACKs for top commit:
  jnewbery:
    utACK fa73493930
  meshcollider:
    utACK fa73493930
  ryanofsky:
    Code review ACK fa73493930. Just rebased since last review

Tree-SHA512: 99e1fe1b2c22a3f4b19de3e566241d38693f4fd8d5a68ba1838d86740aa6c08e3325c11a072e30fd262a8861af4278bed52eb9374c85179b8f536477f528247c

src/qt/test/apptests.cpp

@@ -62,9 +62,10 @@ void AppTests::appTests()
     }
 #endif
 
-    BasicTestingSetup test{CBaseChainParams::REGTEST}; // Create a temp data directory to backup the gui settings to
-    ECC_Stop(); // Already started by the common test setup, so stop it to avoid interference
-    LogInstance().DisconnectTestLogger();
+    fs::create_directories([] {
+        BasicTestingSetup test{CBaseChainParams::REGTEST}; // Create a temp data directory to backup the gui settings to
+        return GetDataDir() / "blocks";
+    }());
 
     m_app.parameterSetup();
     m_app.createOptionsModel(true /* reset settings */);
@@ -80,6 +81,7 @@ void AppTests::appTests()
     m_app.exec();
 
     // Reset global state to avoid interfering with later tests.
+    LogInstance().DisconnectTestLogger();
     AbortShutdown();
     UnloadBlockIndex();
     WITH_LOCK(::cs_main, g_chainman.Reset());

src/qt/test/test_main.cpp

@@ -40,7 +40,7 @@ Q_IMPORT_PLUGIN(QCocoaIntegrationPlugin);
 const std::function<void(const std::string&)> G_TEST_LOG_FUN{};
 
 // This is all you need to run all the tests
-int main(int argc, char *argv[])
+int main(int argc, char* argv[])
 {
     // Initialize persistent globals with the testing setup state for sanity.
     // E.g. -datadir in gArgs is set to a temp directory dummy value (instead
@@ -70,6 +70,8 @@ int main(int argc, char *argv[])
     BitcoinApplication app(*node);
     app.setApplicationName("Bitcoin-Qt-test");
 
+    node->setupServerArgs();            // Make gArgs available in the NodeContext
+    node->context()->args->ClearArgs(); // Clear added args again
     AppTests app_tests(app);
     if (QTest::qExec(&app_tests) != 0) {
         fInvalid = true;