Method testUInt64Max

tests/test_validation.cpp:271–283

    }

    void testUInt64Max() {
        bool ok;
        // UINT64_MAX = 18446744073709551615
        fmt::parseValue(NodeKind::UInt64, "18446744073709551615", &ok);
        QVERIFY(ok);

        // Beyond UINT64_MAX should fail to parse
        fmt::parseValue(NodeKind::UInt64, "18446744073709551616", &ok);
        QVERIFY2(!ok, "UINT64_MAX+1 should fail");

        fmt::parseValue(NodeKind::UInt64, "0xFFFFFFFFFFFFFFFF", &ok);
        QVERIFY(ok);
    }

    // ── Invalid characters in numeric fields ──