pcbjam/tests/README.md

# KiCad WASM Tests

Playwright tests for verifying the wxWidgets WASM port.

## Prerequisites

- Node.js 18+
- Emscripten SDK (for building)

## Building the Test App

```bash
../scripts/build-wasm-test.sh
```

This builds `apps/minimal_test.{html,js,wasm}` and standalone test apps.

## Running Tests

```bash
npm install
npm test          # wx e2e specs + the asyncify race harness
```

KiCad application tests are a separate, heavier suite (they need the
docker-built KiCad WASM): `npm run test:kicad`. Run only the wx e2e specs with
`npm run test:wx`.

To run specific tests:
```bash
npx playwright test menu.spec.ts        # Run menu tests only
npx playwright test --grep "wxTimer"    # Run tests matching pattern
```

## Test Structure

```
tests/
├── e2e/                    # Playwright test specs
│   ├── utils/              # Shared test utilities
│   │   ├── fixtures.ts     # Playwright fixtures with auto-logging
│   │   ├── element-tracker.ts  # Element registry utilities (clickByLabel, etc.)
│   │   └── test-utils.ts   # Logging and helper functions
│   ├── menu.spec.ts        # wxMenuBar tests
│   ├── timer.spec.ts       # wxTimer tests
│   ├── dialog.spec.ts      # wxDialog/wxMessageBox tests
│   ├── tree.spec.ts        # wxTreeCtrl tests
│   ├── grid.spec.ts        # wxGrid/wxSpinCtrl/wxSearchCtrl tests
│   ├── wxwidgets.spec.ts   # Comprehensive UI interaction tests
│   └── ...
├── logs/                   # Test logs (auto-generated)
├── test-results/           # Screenshots (auto-generated)
├── baseline-screenshots/   # Reference screenshots for comparison
├── apps/              # Built WASM test applications
│   ├── minimal_test.html  # Main test app
│   └── standalone/        # Individual component test apps
└── playwright.config.ts   # Playwright configuration
```

## Logging

Each test automatically captures:
- Console logs with timestamps and log levels
- Page errors with full stack traces

Log files are written to `logs/` after each test:
- `<test-name>.log` - All console output
- `<test-name>.errors.log` - Errors only (created if errors occurred)

Example log format:
```
[2025-11-29T19:39:42.165Z] [LOG] [EVENT] Application started
[2025-11-29T19:39:42.733Z] [WARNING] GPU stall due to ReadPixels
[2025-11-29T19:39:42.801Z] [ERROR] Some error message
```

## Screenshots

Tests capture screenshots to `test-results/`. Compare against baselines:
```bash
../scripts/compare-screenshots.sh
```

## Viewing the App Directly

Start a local server in the apps directory:

```bash
cd apps
npx serve .
```

Then open http://localhost:3000/minimal_test.html in your browser.

Alternative using Python:

```bash
cd apps
python3 -m http.server 8000
```

Then open http://localhost:8000/minimal_test.html

## Test Categories

| Spec File | Tests | Description |
|-----------|-------|-------------|
| `wxwidgets.spec.ts` | Comprehensive | Full UI interaction, stability |
| `menu.spec.ts` | wxMenuBar | Menu bar visibility and interactions |
| `timer.spec.ts` | wxTimer | Timer start/stop/reset functionality |
| `dialog.spec.ts` | wxDialog | Message boxes and custom dialogs |
| `tree.spec.ts` | wxTreeCtrl | Tree control with expand/collapse |
| `grid.spec.ts` | wxGrid | Grid, SpinCtrl, SearchCtrl |
| `aui.spec.ts` | wxAuiManager | Dockable panels |
| `clipboard.spec.ts` | wxClipboard | Copy/paste operations |
| `dataview.spec.ts` | wxDataViewCtrl | List and tree data views (Zone Manager-like) |
| `filedialog.spec.ts` | wxFileDialog | File open/save dialogs |
| `htmlwin.spec.ts` | wxHtmlWindow | HTML rendering (About dialogs, error formatting) |
| `layout.spec.ts` | wxSplitter | Splitter and scrolled windows |
| `toolbar.spec.ts` | wxToolBar | Toolbar buttons and status bar |

## Debugging WASM Crashes

When a test fails with a WASM crash (e.g., "memory access out of bounds"), you can build with debug symbols to get meaningful stack traces:

### Debug Build

```bash
# Build test apps with DWARF symbols and source maps
../scripts/build-wasm-test.sh --debug
```

This enables:
- `-g` for DWARF debug info
- `-gsource-map` for browser source maps
- `-O0` for no optimization (preserves debugging context)

### Reading Stack Traces

With a debug build, WASM stack traces show actual function names:

**Before (release build):**
```
RuntimeError: memory access out of bounds
    at wasm-function[102]:0xfdf8
    at wasm-function[99]:0xe6e0
```

**After (debug build):**
```
RuntimeError: memory access out of bounds
    at grid_test.wasm.GridTestFrame::LogEvent(wxString const&)
    at grid_test.wasm.GridTestFrame::OnGridCellSelect(wxGridEvent&)
    at grid_test.wasm.wxEventFunctorMethod<...>::operator()
```

### Using LLVM Tools

For deeper analysis, use Emscripten's LLVM tools:

```bash
LLVM_DIR="/opt/homebrew/Cellar/emscripten/4.0.20/libexec/llvm/bin"

# Check if WASM has DWARF info
$LLVM_DIR/llvm-dwarfdump --debug-info apps/standalone/grid/grid_test.wasm

# Disassemble with function names
$LLVM_DIR/llvm-objdump -d grid_test.wasm | head -200
```

## Element Registry (Recommended)

The wxWidgets WASM port includes an element registry that tracks all wxWindow instances with their positions, labels, and types. This enables tests to find UI elements by semantic identifiers instead of hardcoded pixel coordinates.

### Usage

```typescript
import { waitForRegistry, clickByLabel, findByLabel, findByType } from './utils/fixtures';

// Wait for registry to be available
await waitForRegistry(page);

// Click buttons by label text
await clickByLabel(page, 'Copy to Clipboard');
await clickByLabel(page, 'Save File...');

// Find elements for inspection
const button = await findByLabel(page, 'OK');
if (button) {
  console.log(`Button at (${button.centerX}, ${button.centerY})`);
}

// Find all elements of a type
const buttons = await findByType(page, 'wxButton');
```

### Available Functions

| Function | Description |
|----------|-------------|
| `waitForRegistry(page)` | Wait for element registry to initialize |
| `findByLabel(page, label, options?)` | Find element by label text |
| `findByName(page, name, options?)` | Find element by wxWindow name |
| `findByType(page, typeName, options?)` | Find all elements of a type (e.g., 'wxButton') |
| `clickByLabel(page, label, options?)` | Click element by label |
| `clickByName(page, name, options?)` | Click element by name |

### Options

```typescript
interface FindOptions {
  visible?: boolean;  // Filter by visibility (default: true)
  enabled?: boolean;  // Filter by enabled state
  exact?: boolean;    // Exact label match (default: substring)
  type?: string;      // Filter by type name
}
```

### When to Use

Use the element registry for tests that click on **wxButton** and other wxWindow-based controls. The registry tracks:
- wxButton, wxTextCtrl, wxStaticText, wxPanel, wxFrame, etc.

**Not trackable** (use pixel coordinates instead):
- wxToolBar tool items (rendered by toolbar)
- wxMenuBar menu items (rendered by menu system)
- wxAuiManager panel controls (title bars, close buttons)
- wxGrid cells (rendered by grid)
- wxSplitterWindow sash (rendered by splitter)

### Migrated Tests

These tests use the element registry:
- `clipboard.spec.ts` - Copy, Paste, Check, Clear buttons
- `dialog.spec.ts` - Info, Yes/No, Error, Custom dialog buttons
- `timer.spec.ts` - Start, Stop, Reset buttons
- `filedialog.spec.ts` - Open, Save, Open Multiple buttons
- `logerror.spec.ts` - Trigger Error, Flush Log buttons

### Available Test Apps

| App URL | Description |
|---------|-------------|
| `/standalone/clipboard/clipboard_test.html` | Copy, Paste, Check, Clear buttons |
| `/standalone/dataview/dataview_test.html` | wxDataViewListCtrl and wxDataViewTreeCtrl (Zone Manager-like data) |
| `/standalone/dialog/dialog_test.html` | Info, Yes/No, Error, Custom dialog buttons |
| `/standalone/htmlwin/htmlwin_test.html` | wxHtmlWindow with various HTML content |
| `/standalone/tree/tree_test.html` | Expand All, Collapse All, etc. |
| `/standalone/menu/menu_test.html` | Menu bar testing |
| `/standalone/grid/grid_test.html` | Grid controls |
| `/standalone/aui/aui_test.html` | AUI panel controls |
| `/standalone/toolbar/toolbar_test.html` | Toolbar buttons |
| `/standalone/timer/timer_test.html` | Timer controls |
| `/standalone/filedialog/filedialog_test.html` | File dialog buttons |
| `/standalone/layout/layout_test.html` | Layout controls |

### Environment Variables

| Variable | Default | Description |
|----------|---------|-------------|
| `APP_URL` | (required) | URL path to scan |
| `STEP` | `10` | Pixel step size for scanning (smaller = more accurate but slower) |
| `START_X` | `0` | X coordinate to start scanning |
| `END_X` | canvas width | X coordinate to end scanning |
| `START_Y` | `0` | Y coordinate to start scanning |
| `END_Y` | canvas height | Y coordinate to end scanning |

### Output

The utility outputs:
- Button positions with labels (from console log keywords)
- Generated test code snippets
- Results JSON file at `test-results/button-finder-results.json`

Example output:
```
RESULTS: Found 4 buttons

Button positions (relative to canvas):

  Copy         at (352, 196)
    Log: [CLIPBOARD_EVENT] Attempting to copy text to clipboard...

  Paste        at (600, 196)
    Log: [CLIPBOARD_EVENT] Attempting to paste from clipboard...
```

## Known Issues

- **Timer tests**: May fail due to timing sensitivity
- **Tree tests**: Button click positions may vary

## Open tasks

- **Research: are the Asyncify fiber shims still needed under native-EH?** Two
  `scripts/common/inject-dyncall-shims.sh` fixes — the fiber trampoline self-heal
  (§3c) and the nested-Asyncify handleSleep save/restore (§3) — were written for the
  legacy-EH *park-throw* model. Under native wasm-EH the top loop is a per-frame-yield
  while-loop with no park-throw, so ablating either shim
  (`SHIM_DISABLE_TRAMPOLINE_HEAL` / `SHIM_DISABLE_HANDLESLEEP`, wired in
  `tests/apps/Makefile.wasm`) no longer reproduces the disease it guarded — the old
  red "ablation pins" in `asyncify/asyncify-races.spec.ts` have been flipped to
  green "shim-redundancy pins" that now prove the native-EH path stays clean *with the
  shim ablated*. **To do:** sweep the real apps (modals, nested fibers, long sleeps,
  pthread pool) with each shim ablated; if all stay green, drop the shim injection and
  these pins. Until proven, they stay injected (belt-and-suspenders).