pcbjam/tests

KiCad WASM Tests

Playwright tests for verifying the wxWidgets WASM port.

Prerequisites

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

Building the Test App

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

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

Running Tests

npm install
npm test          # setup:kicad + the full merged run (same projects as CI)

One merged config (playwright.config.ts) drives every wasm suite as Playwright projects; npm run test:e2e runs the CI set: wx-chromium, kicad-firefox, kicad-chromium, jspi-firefox, coroutine-firefox. The KiCad specs (heavier — they need the docker-built KiCad WASM) run on BOTH engines; npm run test:kicad is the firefox-only shortcut. The React web app suite is separate: npm run test:web (see playwright-web.config.ts).

To run a subset, pick a project (and optionally a spec):

npx playwright test --project=wx-chromium menu.spec.ts     # wx menu tests only
npx playwright test --project=kicad-firefox kicad/pcbnew.spec.ts
npx playwright test --project=wx-chromium --grep "wxTimer"

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/{chromium,firefox}/   # Screenshots per engine (auto-generated)
├── baseline-screenshots/{chromium,firefox}/  # Reference screenshots per engine — gitignored cache of the R2 bucket (npm run screenshots:fetch)
├── .baseline-manifest.json  # Gitignored copy of the R2-hosted baseline manifest (npm run screenshots:fetch-manifest)
├── apps/              # Built WASM test applications
│   ├── minimal_test.html  # Main test app
│   └── standalone/        # Individual component test apps
├── playwright.config.ts       # THE merged config (wx / kicad / jspi / coroutine / perf projects)
└── playwright-web.config.ts   # React web-app suite (own server stack)

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 raw PNGs to test-results/<engine>/ (engine-scoped via stableShot/shotPath). The offline gate compares them against the per-engine baselines pinned by the R2-hosted manifest:

npm run screenshots:fetch-manifest && npm run screenshots:fetch
npm run screenshots:check

CI's Linux render is the source of truth — update baselines by promoting a CI run in the morelli review app (https://pcbjam-morelli-staging.pcbjam-staging.workers.dev), never by copying local renders. Rules and details: TESTING.md.

Viewing the App Directly

Start a local server in the apps directory:

cd apps
npx serve .

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

Alternative using Python:

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

# 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:

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

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

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? Resolved at doc 20 D-1, then mooted by the JSPI migration (2026-08): the ablation builds (races_test_noheal / races_test_nosleepfix) and their shim-redundancy pins (in the since-deleted asyncify/asyncify-races.spec.ts) pinned a runtime that no longer exists, and the asyncify scheduler shim they were measured against retired with the backend. The semantic race battery lives on in jspi/suspend-races.spec.ts against the JSPI runtime.

Collab e2e — legacy vs v2 bundles, and repro markers

Two esbuild bundles (npm run build:collab, rebuilt by the specs' beforeAll):

• apps/kicad/collab-bundle.js — the LEGACY scalar wire (startCollab / kicadCollabSnapshot/Apply / onDelta). Dead in production (nothing registers onDelta); driven by the pre-existing *-collab.spec.ts two-tab tests. Kept only until the scalar wire is deleted.
• apps/kicad/collab-bundle-v2.js — the PRODUCTION v2 "items" stack (bindKicadCollab over kicadCollabSnapshotItems/ApplyItems/onItems, Y keys kdoc_*), from collab/browser-entry-v2.ts. Driven by kicad/ysync-two-tab.spec.ts. The build aliases yjs to ONE copy (the two web pnpm workspaces otherwise bundle two, and Y types are instanceof-checked).

ysync repro tests

kicad/ysync-two-tab.spec.ts, kicad/ysync-repros-{pcbnew,eeschema}.spec.ts reproduce the bugs of the 2026-07-02 Yjs⇄KiCad sync review (docs/features/ysync-review/ on the ysync-review branch; unit-level repros live in web/pcbjam-shared/test/ysync-repros.test.ts and web/standalone/src/wasm/collab/ysync-repros.test.ts).

Convention: a repro asserts the CORRECT behavior and is marked expected-fail (test.fail() / vitest it.fails) with a comment naming the bug doc. The suite stays green while the bug is open; fixing the bug flips the repro to "unexpected pass", forcing the marker's removal — the repro becomes the regression test. Green companion tests pin each repro's preconditions (harness, apply path, emit path) so an expected failure can only come from the bug itself. The "local move emits" controls double as the headless-emit probes gating the emit-dependent repros.

Follow-up (tracked in review miss 11): once the v2 specs are trusted, un-skip/retire the legacy two-tab specs together with the legacy wire.