Method testSetNodeValueFloat

tests/test_controller.cpp:168–198

── Test: setNodeValue on Float field ──

    // ── Test: setNodeValue on Float field ──
    void testSetNodeValueFloat() {
        int idx = -1;
        for (int i = 0; i < m_doc->tree.nodes.size(); i++) {
            if (m_doc->tree.nodes[i].name == "field_float") { idx = i; break; }
        }
        QVERIFY(idx >= 0);
        uint64_t addr = m_doc->tree.computeOffset(idx);

        // Original: 3.14f
        QByteArray orig = m_doc->provider->readBytes(addr, 4);
        float origVal;
        memcpy(&origVal, orig.data(), 4);
        QVERIFY(qAbs(origVal - 3.14f) < 0.01f);

        // Write "1.5"
        m_ctrl->setNodeValue(idx, 0, "1.5");
        QApplication::processEvents();

        QByteArray after = m_doc->provider->readBytes(addr, 4);
        float newVal;
        memcpy(&newVal, after.data(), 4);
        QCOMPARE(newVal, 1.5f);

        // Undo
        m_doc->undoStack.undo();
        QApplication::processEvents();
        QByteArray undone = m_doc->provider->readBytes(addr, 4);
        float undoneVal;
        memcpy(&undoneVal, undone.data(), 4);
        QVERIFY(qAbs(undoneVal - 3.14f) < 0.01f);
    }

    // ── Test: renameNode changes name and undo restores ──
    void testRenameNode() {