Reinitialize state in between individual unit tests.

This changes the TestingSetup fixture to be per-unit-test rather than global.
Most tests don't need it, so it's only invoked in a few.

14 files changed, 124 insertions, 61 deletions

diff --git a/src/Makefile.test.include b/src/Makefile.test.include
index 90494439fa..517cd7ea21 100644
--- a/src/Makefile.test.include
+++ b/src/Makefile.test.include
@@ -65,6 +65,7 @@ BITCOIN_TESTS =\
   test/sigopcount_tests.cpp \
   test/skiplist_tests.cpp \
   test/test_bitcoin.cpp \
+  test/test_bitcoin.h \
   test/timedata_tests.cpp \
   test/transaction_tests.cpp \
   test/uint256_tests.cpp \
diff --git a/src/db.cpp b/src/db.cpp
index 3246e4b67a..36946b7dcc 100644
--- a/src/db.cpp
+++ b/src/db.cpp
@@ -39,22 +39,31 @@ void CDBEnv::EnvShutdown()
         return;
 
     fDbEnvInit = false;
-    int ret = dbenv.close(0);
+    int ret = dbenv->close(0);
     if (ret != 0)
         LogPrintf("CDBEnv::EnvShutdown: Error %d shutting down database environment: %s\n", ret, DbEnv::strerror(ret));
     if (!fMockDb)
         DbEnv(0).remove(path.string().c_str(), 0);
 }
 
-CDBEnv::CDBEnv() : dbenv(DB_CXX_NO_EXCEPTIONS)
+void CDBEnv::Reset()
 {
+    delete dbenv;
+    dbenv = new DbEnv(DB_CXX_NO_EXCEPTIONS);
     fDbEnvInit = false;
     fMockDb = false;
 }
 
+CDBEnv::CDBEnv() : dbenv(NULL)
+{
+    Reset();
+}
+
 CDBEnv::~CDBEnv()
 {
     EnvShutdown();
+    delete dbenv;
+    dbenv = NULL;
 }
 
 void CDBEnv::Close()
@@ -79,17 +88,17 @@ bool CDBEnv::Open(const boost::filesystem::path& pathIn)
     if (GetBoolArg("-privdb", true))
         nEnvFlags |= DB_PRIVATE;
 
-    dbenv.set_lg_dir(pathLogDir.string().c_str());
-    dbenv.set_cachesize(0, 0x100000, 1); // 1 MiB should be enough for just the wallet
-    dbenv.set_lg_bsize(0x10000);
-    dbenv.set_lg_max(1048576);
-    dbenv.set_lk_max_locks(40000);
-    dbenv.set_lk_max_objects(40000);
-    dbenv.set_errfile(fopen(pathErrorFile.string().c_str(), "a")); /// debug
-    dbenv.set_flags(DB_AUTO_COMMIT, 1);
-    dbenv.set_flags(DB_TXN_WRITE_NOSYNC, 1);
-    dbenv.log_set_config(DB_LOG_AUTO_REMOVE, 1);
-    int ret = dbenv.open(path.string().c_str(),
+    dbenv->set_lg_dir(pathLogDir.string().c_str());
+    dbenv->set_cachesize(0, 0x100000, 1); // 1 MiB should be enough for just the wallet
+    dbenv->set_lg_bsize(0x10000);
+    dbenv->set_lg_max(1048576);
+    dbenv->set_lk_max_locks(40000);
+    dbenv->set_lk_max_objects(40000);
+    dbenv->set_errfile(fopen(pathErrorFile.string().c_str(), "a")); /// debug
+    dbenv->set_flags(DB_AUTO_COMMIT, 1);
+    dbenv->set_flags(DB_TXN_WRITE_NOSYNC, 1);
+    dbenv->log_set_config(DB_LOG_AUTO_REMOVE, 1);
+    int ret = dbenv->open(path.string().c_str(),
                          DB_CREATE |
                              DB_INIT_LOCK |
                              DB_INIT_LOG |
@@ -116,14 +125,14 @@ void CDBEnv::MakeMock()
 
     LogPrint("db", "CDBEnv::MakeMock\n");
 
-    dbenv.set_cachesize(1, 0, 1);
-    dbenv.set_lg_bsize(10485760 * 4);
-    dbenv.set_lg_max(10485760);
-    dbenv.set_lk_max_locks(10000);
-    dbenv.set_lk_max_objects(10000);
-    dbenv.set_flags(DB_AUTO_COMMIT, 1);
-    dbenv.log_set_config(DB_LOG_IN_MEMORY, 1);
-    int ret = dbenv.open(NULL,
+    dbenv->set_cachesize(1, 0, 1);
+    dbenv->set_lg_bsize(10485760 * 4);
+    dbenv->set_lg_max(10485760);
+    dbenv->set_lk_max_locks(10000);
+    dbenv->set_lk_max_objects(10000);
+    dbenv->set_flags(DB_AUTO_COMMIT, 1);
+    dbenv->log_set_config(DB_LOG_IN_MEMORY, 1);
+    int ret = dbenv->open(NULL,
                          DB_CREATE |
                              DB_INIT_LOCK |
                              DB_INIT_LOG |
@@ -144,7 +153,7 @@ CDBEnv::VerifyResult CDBEnv::Verify(std::string strFile, bool (*recoverFunc)(CDB
     LOCK(cs_db);
     assert(mapFileUseCount.count(strFile) == 0);
 
-    Db db(&dbenv, 0);
+    Db db(dbenv, 0);
     int result = db.verify(strFile.c_str(), NULL, NULL, 0);
     if (result == 0)
         return VERIFY_OK;
@@ -167,7 +176,7 @@ bool CDBEnv::Salvage(std::string strFile, bool fAggressive, std::vector<CDBEnv::
 
     stringstream strDump;
 
-    Db db(&dbenv, 0);
+    Db db(dbenv, 0);
     int result = db.verify(strFile.c_str(), NULL, &strDump, flags);
     if (result == DB_VERIFY_BAD) {
         LogPrintf("CDBEnv::Salvage: Database salvage found errors, all data may not be recoverable.\n");
@@ -208,10 +217,10 @@ bool CDBEnv::Salvage(std::string strFile, bool fAggressive, std::vector<CDBEnv::
 
 void CDBEnv::CheckpointLSN(const std::string& strFile)
 {
-    dbenv.txn_checkpoint(0, 0, 0);
+    dbenv->txn_checkpoint(0, 0, 0);
     if (fMockDb)
         return;
-    dbenv.lsn_reset(strFile.c_str(), 0);
+    dbenv->lsn_reset(strFile.c_str(), 0);
 }
 
 
@@ -237,7 +246,7 @@ CDB::CDB(const std::string& strFilename, const char* pszMode, bool fFlushOnClose
         ++bitdb.mapFileUseCount[strFile];
         pdb = bitdb.mapDb[strFile];
         if (pdb == NULL) {
-            pdb = new Db(&bitdb.dbenv, 0);
+            pdb = new Db(bitdb.dbenv, 0);
 
             bool fMockDb = bitdb.IsMock();
             if (fMockDb) {
@@ -284,7 +293,7 @@ void CDB::Flush()
     if (fReadOnly)
         nMinutes = 1;
 
-    bitdb.dbenv.txn_checkpoint(nMinutes ? GetArg("-dblogsize", 100) * 1024 : 0, nMinutes, 0);
+    bitdb.dbenv->txn_checkpoint(nMinutes ? GetArg("-dblogsize", 100) * 1024 : 0, nMinutes, 0);
 }
 
 void CDB::Close()
@@ -324,7 +333,7 @@ bool CDBEnv::RemoveDb(const string& strFile)
     this->CloseDb(strFile);
 
     LOCK(cs_db);
-    int rc = dbenv.dbremove(NULL, strFile.c_str(), NULL, DB_AUTO_COMMIT);
+    int rc = dbenv->dbremove(NULL, strFile.c_str(), NULL, DB_AUTO_COMMIT);
     return (rc == 0);
 }
 
@@ -344,7 +353,7 @@ bool CDB::Rewrite(const string& strFile, const char* pszSkip)
                 string strFileRes = strFile + ".rewrite";
                 { // surround usage of db with extra {}
                     CDB db(strFile.c_str(), "r");
-                    Db* pdbCopy = new Db(&bitdb.dbenv, 0);
+                    Db* pdbCopy = new Db(bitdb.dbenv, 0);
 
                     int ret = pdbCopy->open(NULL,               // Txn pointer
                                             strFileRes.c_str(), // Filename
@@ -394,10 +403,10 @@ bool CDB::Rewrite(const string& strFile, const char* pszSkip)
                     }
                 }
                 if (fSuccess) {
-                    Db dbA(&bitdb.dbenv, 0);
+                    Db dbA(bitdb.dbenv, 0);
                     if (dbA.remove(strFile.c_str(), NULL, 0))
                         fSuccess = false;
-                    Db dbB(&bitdb.dbenv, 0);
+                    Db dbB(bitdb.dbenv, 0);
                     if (dbB.rename(strFileRes.c_str(), NULL, strFile.c_str(), 0))
                         fSuccess = false;
                 }
@@ -430,10 +439,10 @@ void CDBEnv::Flush(bool fShutdown)
                 // Move log data to the dat file
                 CloseDb(strFile);
                 LogPrint("db", "CDBEnv::Flush: %s checkpoint\n", strFile);
-                dbenv.txn_checkpoint(0, 0, 0);
+                dbenv->txn_checkpoint(0, 0, 0);
                 LogPrint("db", "CDBEnv::Flush: %s detach\n", strFile);
                 if (!fMockDb)
-                    dbenv.lsn_reset(strFile.c_str(), 0);
+                    dbenv->lsn_reset(strFile.c_str(), 0);
                 LogPrint("db", "CDBEnv::Flush: %s closed\n", strFile);
                 mapFileUseCount.erase(mi++);
             } else
@@ -443,7 +452,7 @@ void CDBEnv::Flush(bool fShutdown)
         if (fShutdown) {
             char** listp;
             if (mapFileUseCount.empty()) {
-                dbenv.log_archive(&listp, DB_ARCH_REMOVE);
+                dbenv->log_archive(&listp, DB_ARCH_REMOVE);
                 Close();
                 if (!fMockDb)
                     boost::filesystem::remove_all(path / "database");
diff --git a/src/db.h b/src/db.h
index d208907c89..71133f9699 100644
--- a/src/db.h
+++ b/src/db.h
@@ -39,12 +39,14 @@ private:
 
 public:
     mutable CCriticalSection cs_db;
-    DbEnv dbenv;
+    DbEnv *dbenv;
     std::map<std::string, int> mapFileUseCount;
     std::map<std::string, Db*> mapDb;
 
     CDBEnv();
     ~CDBEnv();
+    void Reset();
+
     void MakeMock();
     bool IsMock() { return fMockDb; }
 
@@ -79,7 +81,7 @@ public:
     DbTxn* TxnBegin(int flags = DB_TXN_WRITE_NOSYNC)
     {
         DbTxn* ptxn = NULL;
-        int ret = dbenv.txn_begin(NULL, &ptxn, flags);
+        int ret = dbenv->txn_begin(NULL, &ptxn, flags);
         if (!ptxn || ret != 0)
             return NULL;
         return ptxn;
diff --git a/src/main.cpp b/src/main.cpp
index b6a61f7da1..d945ece417 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -54,7 +54,6 @@ bool fTxIndex = false;
 bool fIsBareMultisigStd = true;
 unsigned int nCoinCacheSize = 5000;
 
-
 /** Fees smaller than this (in satoshi) are considered zero fee (for relaying and mining) */
 CFeeRate minRelayTxFee = CFeeRate(1000);
 
@@ -3085,10 +3084,31 @@ bool CVerifyDB::VerifyDB(CCoinsView *coinsview, int nCheckLevel, int nCheckDepth
 
 void UnloadBlockIndex()
 {
-    mapBlockIndex.clear();
+    LOCK(cs_main);
     setBlockIndexCandidates.clear();
     chainActive.SetTip(NULL);
     pindexBestInvalid = NULL;
+    pindexBestHeader = NULL;
+    mempool.clear();
+    mapOrphanTransactions.clear();
+    mapOrphanTransactionsByPrev.clear();
+    nSyncStarted = 0;
+    mapBlocksUnlinked.clear();
+    vinfoBlockFile.clear();
+    nLastBlockFile = 0;
+    nBlockSequenceId = 1;
+    mapBlockSource.clear();
+    mapBlocksInFlight.clear();
+    nQueuedValidatedHeaders = 0;
+    nPreferredDownload = 0;
+    setDirtyBlockIndex.clear();
+    setDirtyFileInfo.clear();
+    mapNodeState.clear();
+
+    BOOST_FOREACH(BlockMap::value_type& entry, mapBlockIndex) {
+        delete entry.second;
+    }
+    mapBlockIndex.clear();
 }
 
 bool LoadBlockIndex()
diff --git a/src/test/DoS_tests.cpp b/src/test/DoS_tests.cpp
index 9407511ecb..bf25548755 100644
--- a/src/test/DoS_tests.cpp
+++ b/src/test/DoS_tests.cpp
@@ -16,6 +16,8 @@
 #include "serialize.h"
 #include "util.h"
 
+#include "test/test_bitcoin.h"
+
 #include <stdint.h>
 
 #include <boost/assign/list_of.hpp> // for 'map_list_of()'
@@ -41,7 +43,7 @@ CService ip(uint32_t i)
     return CService(CNetAddr(s), Params().GetDefaultPort());
 }
 
-BOOST_AUTO_TEST_SUITE(DoS_tests)
+BOOST_FIXTURE_TEST_SUITE(DoS_tests, TestingSetup)
 
 BOOST_AUTO_TEST_CASE(DoS_banning)
 {
diff --git a/src/test/accounting_tests.cpp b/src/test/accounting_tests.cpp
index da07b8c7a6..36499f01a7 100644
--- a/src/test/accounting_tests.cpp
+++ b/src/test/accounting_tests.cpp
@@ -5,6 +5,8 @@
 #include "wallet.h"
 #include "walletdb.h"
 
+#include "test/test_bitcoin.h"
+
 #include <stdint.h>
 
 #include <boost/foreach.hpp>
@@ -12,7 +14,7 @@
 
 extern CWallet* pwalletMain;
 
-BOOST_AUTO_TEST_SUITE(accounting_tests)
+BOOST_FIXTURE_TEST_SUITE(accounting_tests, TestingSetup)
 
 static void
 GetResults(CWalletDB& walletdb, std::map<CAmount, CAccountingEntry>& results)
diff --git a/src/test/alert_tests.cpp b/src/test/alert_tests.cpp
index efc9211717..5e1f5f0294 100644
--- a/src/test/alert_tests.cpp
+++ b/src/test/alert_tests.cpp
@@ -15,6 +15,8 @@
 #include "util.h"
 #include "utilstrencodings.h"
 
+#include "test/test_bitcoin.h"
+
 #include <fstream>
 
 #include <boost/filesystem/operations.hpp>
@@ -78,7 +80,7 @@
 }
 #endif
 
-struct ReadAlerts
+struct ReadAlerts : public TestingSetup
 {
     ReadAlerts()
     {
diff --git a/src/test/miner_tests.cpp b/src/test/miner_tests.cpp
index 44c57a8eaf..6ab9cb8a44 100644
--- a/src/test/miner_tests.cpp
+++ b/src/test/miner_tests.cpp
@@ -8,9 +8,11 @@
 #include "uint256.h"
 #include "util.h"
 
+#include "test/test_bitcoin.h"
+
 #include <boost/test/unit_test.hpp>
 
-BOOST_AUTO_TEST_SUITE(miner_tests)
+BOOST_FIXTURE_TEST_SUITE(miner_tests, TestingSetup)
 
 static
 struct {
diff --git a/src/test/rpc_tests.cpp b/src/test/rpc_tests.cpp
index 1c6963001f..45cb551d04 100644
--- a/src/test/rpc_tests.cpp
+++ b/src/test/rpc_tests.cpp
@@ -8,6 +8,8 @@
 #include "base58.h"
 #include "netbase.h"
 
+#include "test/test_bitcoin.h"
+
 #include <boost/algorithm/string.hpp>
 #include <boost/test/unit_test.hpp>
 
@@ -45,7 +47,7 @@ Value CallRPC(string args)
 }
 
 
-BOOST_AUTO_TEST_SUITE(rpc_tests)
+BOOST_FIXTURE_TEST_SUITE(rpc_tests, TestingSetup)
 
 BOOST_AUTO_TEST_CASE(rpc_rawparams)
 {
diff --git a/src/test/rpc_wallet_tests.cpp b/src/test/rpc_wallet_tests.cpp
index 57c49c2dfc..44475076b3 100644
--- a/src/test/rpc_wallet_tests.cpp
+++ b/src/test/rpc_wallet_tests.cpp
@@ -8,6 +8,8 @@
 #include "base58.h"
 #include "wallet.h"
 
+#include "test/test_bitcoin.h"
+
 #include <boost/algorithm/string.hpp>
 #include <boost/test/unit_test.hpp>
 
@@ -19,7 +21,7 @@ extern Value CallRPC(string args);
 
 extern CWallet* pwalletMain;
 
-BOOST_AUTO_TEST_SUITE(rpc_wallet_tests)
+BOOST_FIXTURE_TEST_SUITE(rpc_wallet_tests, TestingSetup)
 
 BOOST_AUTO_TEST_CASE(rpc_addmultisig)
 {
diff --git a/src/test/test_bitcoin.cpp b/src/test/test_bitcoin.cpp
index f2dae99d69..5df417b8e5 100644
--- a/src/test/test_bitcoin.cpp
+++ b/src/test/test_bitcoin.cpp
@@ -4,6 +4,8 @@
 
 #define BOOST_TEST_MODULE Bitcoin Test Suite
 
+#include "test_bitcoin.h"
+
 #include "main.h"
 #include "random.h"
 #include "txdb.h"
@@ -24,18 +26,15 @@ CWallet* pwalletMain;
 extern bool fPrintToConsole;
 extern void noui_connect();
 
-struct TestingSetup {
-    CCoinsViewDB *pcoinsdbview;
-    boost::filesystem::path pathTemp;
-    boost::thread_group threadGroup;
-
-    TestingSetup() {
+TestingSetup::TestingSetup()
+{
         fPrintToDebugLog = false; // don't want to write to debug.log file
         SelectParams(CBaseChainParams::UNITTEST);
         noui_connect();
 #ifdef ENABLE_WALLET
         bitdb.MakeMock();
 #endif
+        ClearDatadirCache();
         pathTemp = GetTempPath() / strprintf("test_bitcoin_%lu_%i", (unsigned long)GetTime(), (int)(GetRand(100000)));
         boost::filesystem::create_directories(pathTemp);
         mapArgs["-datadir"] = pathTemp.string();
@@ -53,27 +52,28 @@ struct TestingSetup {
         for (int i=0; i < nScriptCheckThreads-1; i++)
             threadGroup.create_thread(&ThreadScriptCheck);
         RegisterNodeSignals(GetNodeSignals());
-    }
-    ~TestingSetup()
-    {
+}
+
+TestingSetup::~TestingSetup()
+{
+        UnregisterNodeSignals(GetNodeSignals());
         threadGroup.interrupt_all();
         threadGroup.join_all();
-        UnregisterNodeSignals(GetNodeSignals());
 #ifdef ENABLE_WALLET
+        UnregisterValidationInterface(pwalletMain);
         delete pwalletMain;
         pwalletMain = NULL;
 #endif
+        UnloadBlockIndex();
         delete pcoinsTip;
         delete pcoinsdbview;
         delete pblocktree;
 #ifdef ENABLE_WALLET
         bitdb.Flush(true);
+        bitdb.Reset();
 #endif
         boost::filesystem::remove_all(pathTemp);
-    }
-};
-
-BOOST_GLOBAL_FIXTURE(TestingSetup);
+}
 
 void Shutdown(void* parg)
 {
diff --git a/src/test/test_bitcoin.h b/src/test/test_bitcoin.h
new file mode 100644
index 0000000000..c1448dcdeb
--- /dev/null
+++ b/src/test/test_bitcoin.h
@@ -0,0 +1,18 @@
+#ifndef BITCOIN_TEST_TEST_BITCOIN_H
+#define BITCOIN_TEST_TEST_BITCOIN_H
+
+#include "txdb.h"
+
+#include <boost/filesystem.hpp>
+#include <boost/thread.hpp>
+
+struct TestingSetup {
+    CCoinsViewDB *pcoinsdbview;
+    boost::filesystem::path pathTemp;
+    boost::thread_group threadGroup;
+
+    TestingSetup();
+    ~TestingSetup();
+};
+
+#endif
diff --git a/src/util.h b/src/util.h
index bbb0e81039..4d0cb7136e 100644
--- a/src/util.h
+++ b/src/util.h
@@ -94,6 +94,7 @@ bool RenameOver(boost::filesystem::path src, boost::filesystem::path dest);
 bool TryCreateDirectory(const boost::filesystem::path& p);
 boost::filesystem::path GetDefaultDataDir();
 const boost::filesystem::path &GetDataDir(bool fNetSpecific = true);
+void ClearDatadirCache();
 boost::filesystem::path GetConfigFile();
 #ifndef WIN32
 boost::filesystem::path GetPidFile();
diff --git a/src/walletdb.cpp b/src/walletdb.cpp
index b2daf036ff..ddec57d9a9 100644
--- a/src/walletdb.cpp
+++ b/src/walletdb.cpp
@@ -903,8 +903,8 @@ bool CWalletDB::Recover(CDBEnv& dbenv, std::string filename, bool fOnlyKeys)
     int64_t now = GetTime();
     std::string newFilename = strprintf("wallet.%d.bak", now);
 
-    int result = dbenv.dbenv.dbrename(NULL, filename.c_str(), NULL,
-                                      newFilename.c_str(), DB_AUTO_COMMIT);
+    int result = dbenv.dbenv->dbrename(NULL, filename.c_str(), NULL,
+                                       newFilename.c_str(), DB_AUTO_COMMIT);
     if (result == 0)
         LogPrintf("Renamed %s to %s\n", filename, newFilename);
     else
@@ -923,7 +923,7 @@ bool CWalletDB::Recover(CDBEnv& dbenv, std::string filename, bool fOnlyKeys)
     LogPrintf("Salvage(aggressive) found %u records\n", salvagedData.size());
 
     bool fSuccess = allOK;
-    boost::scoped_ptr<Db> pdbCopy(new Db(&dbenv.dbenv, 0));
+    boost::scoped_ptr<Db> pdbCopy(new Db(dbenv.dbenv, 0));
     int ret = pdbCopy->open(NULL,               // Txn pointer
                             filename.c_str(),   // Filename
                             "main",             // Logical db name