G2.0: StateStore (JSON state file + atomic write)

2026-08-16 07:08:37 +07:00
parent af9a285974
commit 1fe2d261fd
4 changed files with 371 additions and 0 deletions
@@ -0,0 +1,65 @@
+// native_bridge/debug/test_state_store.cpp
+// G2.0 self-check: StateStore save/load/clear round-trip (not part of bridge).
+// Build: cl /nologo /EHsc /std:c++17 /I native_bridge/include \
+//        debug/test_state_store.cpp native_bridge/src/StateStore.cpp
+#include "StateStore.h"
+
+#include <cassert>
+#include <cstdio>
+#include <string>
+
+int main() {
+    const char* path = "state_roundtrip_test.json";
+
+    BridgeStateSnapshot snap;
+    snap.playing = true;
+    snap.playhead = 123.456789;
+
+    InstrumentStateEntry a;
+    a.channel = 0; a.type = 0; // VST3
+    a.path = "C:\\Program Files\\Common Files\\VST3\\Nexus.vst3";
+    a.presetBase64 = "AB+//w=="; // base64 chars incl + / =
+    a.bank = 0; a.program = 2;
+
+    InstrumentStateEntry b;
+    b.channel = 3; b.type = 2; // SF2/SF3
+    b.path = "C:\\sounds\\my bank.sf2";
+    b.presetBase64 = "line1\nline2\t\"quoted\"\\tail";
+    b.bank = 1; b.program = 5;
+
+    snap.instruments.push_back(a);
+    snap.instruments.push_back(b);
+
+    assert(StateStore::save(snap, path));
+
+    // Atomic write: no .tmp leftover after save.
+    FILE* tmp = std::fopen((std::string(path) + ".tmp").c_str(), "rb");
+    assert(tmp == nullptr);
+    if (tmp) std::fclose(tmp);
+
+    BridgeStateSnapshot out;
+    assert(StateStore::load(out, path));
+    assert(out.playing == true);
+    assert(out.playhead == 123.456789);
+    assert(out.instruments.size() == 2);
+    assert(out.instruments[0].channel == 0);
+    assert(out.instruments[0].type == 0);
+    assert(out.instruments[0].path == "C:\\Program Files\\Common Files\\VST3\\Nexus.vst3");
+    assert(out.instruments[0].presetBase64 == "AB+//w==");
+    assert(out.instruments[0].bank == 0 && out.instruments[0].program == 2);
+    assert(out.instruments[1].channel == 3);
+    assert(out.instruments[1].type == 2);
+    assert(out.instruments[1].path == "C:\\sounds\\my bank.sf2");
+    assert(out.instruments[1].presetBase64 == "line1\nline2\t\"quoted\"\\tail");
+    assert(out.instruments[1].bank == 1 && out.instruments[1].program == 5);
+
+    // Missing file -> load false, no crash.
+    assert(!StateStore::load(out, "no_such_file.json"));
+
+    // clear removes the file.
+    assert(StateStore::clear(path));
+    assert(!StateStore::load(out, path));
+
+    std::printf("state_store round-trip PASS\n");
+    return 0;
+}