Merge #19098: test: Remove duplicate NodeContext hacks

edc316020e8270dafc5e31465d532baebdafd3dd test: Remove duplicate NodeContext hacks (Russell Yanofsky)

Pull request description:

  Qt tests currently are currently using two NodeContext structs at the same time, one in interfaces::NodeImpl::m_context, and the other in BasicTestingSetup::m_node, and the tests have hacks transferring state between them.

  Fix this by getting rid of the NodeImpl::m_context struct and making it a pointer. This way a common BitcoinApplication object can be used for all qt tests, but they can still have their own testing setups.

  Non-test code is changing but non-test behavior is still the same as before.

  Motivation for this PR is to be able to remove the "std::move(test.m_node.connman)" and mempool hacks for swapping individual NodeContext members in Qt tests, because followup PR #19099 adds yet another member (wallet_client) that needs to be swapped. After this change, the whole NodeContext struct can be swapped instead of individual members, so the workarounds are less fragile and invasive.

ACKs for top commit:
  MarcoFalke:
    crACK edc316020e8270dafc5e31465d532baebdafd3dd 🌮
  promag:
    ACK edc316020e8270dafc5e31465d532baebdafd3dd.

Tree-SHA512: c1650e4127f43a4020304ca7c13b5d9122fb5723aacd8fa1cf855d03c6052fcfb7685810aa2a5ef708561015f0022fecaacbad479295104ca45d2c17579466a4

2 files changed, 46 insertions, 34 deletions

diff --git a/src/interfaces/node.cpp b/src/interfaces/node.cpp
index 33f0dac263..969767b90f 100644
--- a/src/interfaces/node.cpp
+++ b/src/interfaces/node.cpp
@@ -56,6 +56,7 @@ namespace {
 class NodeImpl : public Node
 {
 public:
+    NodeImpl(NodeContext* context) { setContext(context); }
     void initError(const bilingual_str& message) override { InitError(message); }
     bool parseParameters(int argc, const char* const argv[], std::string& error) override
     {
@@ -81,13 +82,13 @@ public:
     }
     bool appInitMain() override
     {
-        m_context.chain = MakeChain(m_context);
-        return AppInitMain(m_context_ref, m_context);
+        m_context->chain = MakeChain(*m_context);
+        return AppInitMain(m_context_ref, *m_context);
     }
     void appShutdown() override
     {
-        Interrupt(m_context);
-        Shutdown(m_context);
+        Interrupt(*m_context);
+        Shutdown(*m_context);
     }
     void startShutdown() override
     {
@@ -108,19 +109,19 @@ public:
             StopMapPort();
         }
     }
-    void setupServerArgs() override { return SetupServerArgs(m_context); }
+    void setupServerArgs() override { return SetupServerArgs(*m_context); }
     bool getProxy(Network net, proxyType& proxy_info) override { return GetProxy(net, proxy_info); }
     size_t getNodeCount(CConnman::NumConnections flags) override
     {
-        return m_context.connman ? m_context.connman->GetNodeCount(flags) : 0;
+        return m_context->connman ? m_context->connman->GetNodeCount(flags) : 0;
     }
     bool getNodesStats(NodesStats& stats) override
     {
         stats.clear();
 
-        if (m_context.connman) {
+        if (m_context->connman) {
             std::vector<CNodeStats> stats_temp;
-            m_context.connman->GetNodeStats(stats_temp);
+            m_context->connman->GetNodeStats(stats_temp);
 
             stats.reserve(stats_temp.size());
             for (auto& node_stats_temp : stats_temp) {
@@ -141,46 +142,46 @@ public:
     }
     bool getBanned(banmap_t& banmap) override
     {
-        if (m_context.banman) {
-            m_context.banman->GetBanned(banmap);
+        if (m_context->banman) {
+            m_context->banman->GetBanned(banmap);
             return true;
         }
         return false;
     }
     bool ban(const CNetAddr& net_addr, int64_t ban_time_offset) override
     {
-        if (m_context.banman) {
-            m_context.banman->Ban(net_addr, ban_time_offset);
+        if (m_context->banman) {
+            m_context->banman->Ban(net_addr, ban_time_offset);
             return true;
         }
         return false;
     }
     bool unban(const CSubNet& ip) override
     {
-        if (m_context.banman) {
-            m_context.banman->Unban(ip);
+        if (m_context->banman) {
+            m_context->banman->Unban(ip);
             return true;
         }
         return false;
     }
     bool disconnectByAddress(const CNetAddr& net_addr) override
     {
-        if (m_context.connman) {
-            return m_context.connman->DisconnectNode(net_addr);
+        if (m_context->connman) {
+            return m_context->connman->DisconnectNode(net_addr);
         }
         return false;
     }
     bool disconnectById(NodeId id) override
     {
-        if (m_context.connman) {
-            return m_context.connman->DisconnectNode(id);
+        if (m_context->connman) {
+            return m_context->connman->DisconnectNode(id);
         }
         return false;
     }
-    int64_t getTotalBytesRecv() override { return m_context.connman ? m_context.connman->GetTotalBytesRecv() : 0; }
-    int64_t getTotalBytesSent() override { return m_context.connman ? m_context.connman->GetTotalBytesSent() : 0; }
-    size_t getMempoolSize() override { return m_context.mempool ? m_context.mempool->size() : 0; }
-    size_t getMempoolDynamicUsage() override { return m_context.mempool ? m_context.mempool->DynamicMemoryUsage() : 0; }
+    int64_t getTotalBytesRecv() override { return m_context->connman ? m_context->connman->GetTotalBytesRecv() : 0; }
+    int64_t getTotalBytesSent() override { return m_context->connman ? m_context->connman->GetTotalBytesSent() : 0; }
+    size_t getMempoolSize() override { return m_context->mempool ? m_context->mempool->size() : 0; }
+    size_t getMempoolDynamicUsage() override { return m_context->mempool ? m_context->mempool->DynamicMemoryUsage() : 0; }
     bool getHeaderTip(int& height, int64_t& block_time) override
     {
         LOCK(::cs_main);
@@ -223,11 +224,11 @@ public:
     bool getImporting() override { return ::fImporting; }
     void setNetworkActive(bool active) override
     {
-        if (m_context.connman) {
-            m_context.connman->SetNetworkActive(active);
+        if (m_context->connman) {
+            m_context->connman->SetNetworkActive(active);
         }
     }
-    bool getNetworkActive() override { return m_context.connman && m_context.connman->GetNetworkActive(); }
+    bool getNetworkActive() override { return m_context->connman && m_context->connman->GetNetworkActive(); }
     CFeeRate estimateSmartFee(int num_blocks, bool conservative, int* returned_target = nullptr) override
     {
         FeeCalculation fee_calc;
@@ -269,7 +270,7 @@ public:
     std::vector<std::unique_ptr<Wallet>> getWallets() override
     {
         std::vector<std::unique_ptr<Wallet>> wallets;
-        for (auto& client : m_context.chain_clients) {
+        for (auto& client : m_context->chain_clients) {
             auto client_wallets = client->getWallets();
             std::move(client_wallets.begin(), client_wallets.end(), std::back_inserter(wallets));
         }
@@ -277,12 +278,12 @@ public:
     }
     std::unique_ptr<Wallet> loadWallet(const std::string& name, bilingual_str& error, std::vector<bilingual_str>& warnings) override
     {
-        return MakeWallet(LoadWallet(*m_context.chain, name, error, warnings));
+        return MakeWallet(LoadWallet(*m_context->chain, name, error, warnings));
     }
     std::unique_ptr<Wallet> createWallet(const SecureString& passphrase, uint64_t wallet_creation_flags, const std::string& name, bilingual_str& error, std::vector<bilingual_str>& warnings, WalletCreationStatus& status) override
     {
         std::shared_ptr<CWallet> wallet;
-        status = CreateWallet(*m_context.chain, passphrase, wallet_creation_flags, name, error, warnings, wallet);
+        status = CreateWallet(*m_context->chain, passphrase, wallet_creation_flags, name, error, warnings, wallet);
         return MakeWallet(wallet);
     }
     std::unique_ptr<Handler> handleInitMessage(InitMessageFn fn) override
@@ -336,13 +337,22 @@ public:
                     /* verification progress is unused when a header was received */ 0);
             }));
     }
-    NodeContext* context() override { return &m_context; }
-    NodeContext m_context;
-    util::Ref m_context_ref{m_context};
+    NodeContext* context() override { return m_context; }
+    void setContext(NodeContext* context) override
+    {
+        m_context = context;
+        if (context) {
+            m_context_ref.Set(*context);
+        } else {
+            m_context_ref.Clear();
+        }
+    }
+    NodeContext* m_context{nullptr};
+    util::Ref m_context_ref;
 };
 
 } // namespace
 
-std::unique_ptr<Node> MakeNode() { return MakeUnique<NodeImpl>(); }
+std::unique_ptr<Node> MakeNode(NodeContext* context) { return MakeUnique<NodeImpl>(context); }
 
 } // namespace interfaces
diff --git a/src/interfaces/node.h b/src/interfaces/node.h
index a9680c42b5..cd3cfe487d 100644
--- a/src/interfaces/node.h
+++ b/src/interfaces/node.h
@@ -268,12 +268,14 @@ public:
         std::function<void(SynchronizationState, interfaces::BlockTip tip, double verification_progress)>;
     virtual std::unique_ptr<Handler> handleNotifyHeaderTip(NotifyHeaderTipFn fn) = 0;
 
-    //! Return pointer to internal chain interface, useful for testing.
+    //! Get and set internal node context. Useful for testing, but not
+    //! accessible across processes.
     virtual NodeContext* context() { return nullptr; }
+    virtual void setContext(NodeContext* context) { }
 };
 
 //! Return implementation of Node interface.
-std::unique_ptr<Node> MakeNode();
+std::unique_ptr<Node> MakeNode(NodeContext* context = nullptr);
 
 //! Block tip (could be a header or not, depends on the subscribed signal).
 struct BlockTip {