| 417 | } |
| 418 | |
| 419 | void testPointerDerefNull() { |
| 420 | NodeTree tree; |
| 421 | tree.baseAddress = 0; |
| 422 | |
| 423 | Node main; |
| 424 | main.kind = NodeKind::Struct; |
| 425 | main.name = "Main"; |
| 426 | main.parentId = 0; |
| 427 | main.offset = 0; |
| 428 | int mi = tree.addNode(main); |
| 429 | uint64_t mainId = tree.nodes[mi].id; |
| 430 | |
| 431 | Node tmpl; |
| 432 | tmpl.kind = NodeKind::Struct; |
| 433 | tmpl.name = "Target"; |
| 434 | tmpl.parentId = 0; |
| 435 | tmpl.offset = 200; |
| 436 | int ti = tree.addNode(tmpl); |
| 437 | uint64_t tmplId = tree.nodes[ti].id; |
| 438 | |
| 439 | Node tf; |
| 440 | tf.kind = NodeKind::UInt32; |
| 441 | tf.name = "field"; |
| 442 | tf.parentId = tmplId; |
| 443 | tf.offset = 0; |
| 444 | tree.addNode(tf); |
| 445 | |
| 446 | Node ptr; |
| 447 | ptr.kind = NodeKind::Pointer64; |
| 448 | ptr.name = "ptr"; |
| 449 | ptr.parentId = mainId; |
| 450 | ptr.offset = 0; |
| 451 | ptr.refId = tmplId; |
| 452 | tree.addNode(ptr); |
| 453 | |
| 454 | // All zeros = null pointer |
| 455 | QByteArray data(256, '\0'); |
| 456 | BufferProvider prov(data); |
| 457 | |
| 458 | ComposeResult result = compose(tree, prov); |
| 459 | |
| 460 | // CommandRow + ptr(merged fold header) + target field + ptr footer + Main footer = 5 |
| 461 | // Target standalone: header + field + footer = 3 |
| 462 | // Total = 8 (null ptr still shows template preview) |
| 463 | QCOMPARE(result.meta.size(), 8); |
| 464 | |
| 465 | // Pointer as merged fold header (expanded — shows template at offset 0) |
| 466 | QCOMPARE(result.meta[1].lineKind, LineKind::Header); |
| 467 | QCOMPARE(result.meta[1].depth, 1); |
| 468 | QVERIFY(result.meta[1].foldHead); |
| 469 | |
| 470 | // Target field shown as template preview |
| 471 | QCOMPARE(result.meta[2].lineKind, LineKind::Field); |
| 472 | QCOMPARE(result.meta[2].depth, 2); |
| 473 | |
| 474 | // Pointer fold footer |
| 475 | QCOMPARE(result.meta[3].lineKind, LineKind::Footer); |
| 476 | } |