[Qt] RPC-Console: support nested commands and simple value queries

Commands can be executed with bracket syntax, example: `getwalletinfo()`.
Commands can be nested, example: `sendtoaddress(getnewaddress(), 10)`.
Simple queries are possible: `listunspent()[0][txid]`
Object values are accessed with a non-quoted string, example: [txid].

Fully backward compatible.
`generate 101` is identical to `generate(101)`
Result value queries indicated with `[]` require the new brackets syntax.
Comma as argument separator is now also possible: `sendtoaddress,<address>,<amount>`
Space as argument separator works also with the bracket syntax, example: `sendtoaddress(getnewaddress() 10)

No dept limitation, complex commands are possible:
`decoderawtransaction(getrawtransaction(getblock(getbestblockhash())[tx][0]))[vout][0][value]`

3 files changed, 133 insertions, 1 deletions

diff --git a/src/qt/test/rpcnestedtests.cpp b/src/qt/test/rpcnestedtests.cpp
new file mode 100644
index 0000000000..3dae33bafb
--- /dev/null
+++ b/src/qt/test/rpcnestedtests.cpp
@@ -0,0 +1,93 @@
+// Copyright (c) 2016 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 "rpcnestedtests.h"
+
+#include "chainparams.h"
+#include "consensus/validation.h"
+#include "main.h"
+#include "rpc/register.h"
+#include "rpc/server.h"
+#include "rpcconsole.h"
+#include "test/testutil.h"
+#include "univalue.h"
+#include "util.h"
+
+#include <QDir>
+
+#include <boost/filesystem.hpp>
+
+void RPCNestedTests::rpcNestedTests()
+{
+    UniValue jsonRPCError;
+
+    // do some test setup
+    // could be moved to a more generic place when we add more tests on QT level
+    const CChainParams& chainparams = Params();
+    RegisterAllCoreRPCCommands(tableRPC);
+    ClearDatadirCache();
+    std::string path = QDir::tempPath().toStdString() + "/" + strprintf("test_bitcoin_qt_%lu_%i", (unsigned long)GetTime(), (int)(GetRand(100000)));
+    QDir dir(QString::fromStdString(path));
+    dir.mkpath(".");
+    mapArgs["-datadir"] = path;
+    //mempool.setSanityCheck(1.0);
+    pblocktree = new CBlockTreeDB(1 << 20, true);
+    pcoinsdbview = new CCoinsViewDB(1 << 23, true);
+    pcoinsTip = new CCoinsViewCache(pcoinsdbview);
+    InitBlockIndex(chainparams);
+    {
+        CValidationState state;
+        bool ok = ActivateBestChain(state, chainparams);
+        QVERIFY(ok);
+    }
+
+    SetRPCWarmupFinished();
+
+    std::string result;
+    std::string result2;
+    RPCConsole::RPCExecuteCommandLine(result, "getblockchaininfo()[chain]"); //simple result filtering with path
+    QVERIFY(result=="main");
+
+    RPCConsole::RPCExecuteCommandLine(result, "getblock(getbestblockhash())"); //simple 2 level nesting
+    RPCConsole::RPCExecuteCommandLine(result, "getblock(getblock(getbestblockhash())[hash], true)");
+
+    RPCConsole::RPCExecuteCommandLine(result, "getblock( getblock( getblock(getbestblockhash())[hash] )[hash], true)"); //4 level nesting with whitespace, filtering path and boolean parameter
+
+    RPCConsole::RPCExecuteCommandLine(result, "getblockchaininfo");
+    QVERIFY(result.substr(0,1) == "{");
+
+    RPCConsole::RPCExecuteCommandLine(result, "getblockchaininfo()");
+    QVERIFY(result.substr(0,1) == "{");
+
+    RPCConsole::RPCExecuteCommandLine(result, "getblockchaininfo "); //whitespace at the end will be tolerated
+    QVERIFY(result.substr(0,1) == "{");
+
+#if QT_VERSION >= 0x050300
+    // do the QVERIFY_EXCEPTION_THROWN checks only with Qt5.3 and higher (QVERIFY_EXCEPTION_THROWN was introduced in Qt5.3)
+    QVERIFY_EXCEPTION_THROWN(RPCConsole::RPCExecuteCommandLine(result, "getblockchaininfo() .\n"), std::runtime_error); //invalid syntax
+    QVERIFY_EXCEPTION_THROWN(RPCConsole::RPCExecuteCommandLine(result, "getblockchaininfo() getblockchaininfo()"), std::runtime_error); //invalid syntax
+    (RPCConsole::RPCExecuteCommandLine(result, "getblockchaininfo(")); //tolerate non closing brackets if we have no arguments
+    (RPCConsole::RPCExecuteCommandLine(result, "getblockchaininfo()()()")); //tolerate non command brackts
+    QVERIFY_EXCEPTION_THROWN(RPCConsole::RPCExecuteCommandLine(result, "getblockchaininfo(True)"), UniValue); //invalid argument
+    QVERIFY_EXCEPTION_THROWN(RPCConsole::RPCExecuteCommandLine(result, "a(getblockchaininfo(True))"), UniValue); //method not found
+#endif
+
+    (RPCConsole::RPCExecuteCommandLine(result, "getblockchaininfo()[\"chain\"]")); //Quote path identifier are allowed, but look after a child contaning the quotes in the key
+    QVERIFY(result == "null");
+
+    (RPCConsole::RPCExecuteCommandLine(result, "createrawtransaction [] {} 0")); //parameter not in brackets are allowed
+    (RPCConsole::RPCExecuteCommandLine(result2, "createrawtransaction([],{},0)")); //parameter in brackets are allowed
+    QVERIFY(result == result2);
+    (RPCConsole::RPCExecuteCommandLine(result2, "createrawtransaction( [],  {} , 0   )")); //whitespace between parametres is allowed
+    QVERIFY(result == result2);
+
+    RPCConsole::RPCExecuteCommandLine(result, "getblock(getbestblockhash())[tx][0]");
+    QVERIFY(result == "4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b");
+
+    delete pcoinsTip;
+    delete pcoinsdbview;
+    delete pblocktree;
+
+    boost::filesystem::remove_all(boost::filesystem::path(path));
+}
diff --git a/src/qt/test/rpcnestedtests.h b/src/qt/test/rpcnestedtests.h
new file mode 100644
index 0000000000..9ad409019f
--- /dev/null
+++ b/src/qt/test/rpcnestedtests.h
@@ -0,0 +1,25 @@
+// Copyright (c) 2016 The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#ifndef BITCOIN_QT_TEST_RPC_NESTED_TESTS_H
+#define BITCOIN_QT_TEST_RPC_NESTED_TESTS_H
+
+#include <QObject>
+#include <QTest>
+
+#include "txdb.h"
+#include "txmempool.h"
+
+class RPCNestedTests : public QObject
+{
+    Q_OBJECT
+
+    private Q_SLOTS:
+    void rpcNestedTests();
+
+private:
+    CCoinsViewDB *pcoinsdbview;
+};
+
+#endif // BITCOIN_QT_TEST_RPC_NESTED_TESTS_H
diff --git a/src/qt/test/test_main.cpp b/src/qt/test/test_main.cpp
index db193420bf..dbaab54fb6 100644
--- a/src/qt/test/test_main.cpp
+++ b/src/qt/test/test_main.cpp
@@ -1,4 +1,4 @@
-// Copyright (c) 2009-2015 The Bitcoin Core developers
+// Copyright (c) 2009-2016 The Bitcoin Core developers
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
@@ -6,6 +6,9 @@
 #include "config/bitcoin-config.h"
 #endif
 
+#include "chainparams.h"
+#include "key.h"
+#include "rpcnestedtests.h"
 #include "util.h"
 #include "uritests.h"
 
@@ -27,10 +30,17 @@ Q_IMPORT_PLUGIN(qtwcodecs)
 Q_IMPORT_PLUGIN(qkrcodecs)
 #endif
 
+extern void noui_connect();
+
 // This is all you need to run all the tests
 int main(int argc, char *argv[])
 {
+    ECC_Start();
     SetupEnvironment();
+    SetupNetworking();
+    SelectParams(CBaseChainParams::MAIN);
+    noui_connect();
+
     bool fInvalid = false;
 
     // Don't remove this, it's needed to access
@@ -48,6 +58,10 @@ int main(int argc, char *argv[])
     if (QTest::qExec(&test2) != 0)
         fInvalid = true;
 #endif
+    RPCNestedTests test3;
+    if (QTest::qExec(&test3) != 0)
+        fInvalid = true;
 
+    ECC_Stop();
     return fInvalid;
 }