Files
sanderling/examples/folio
pj 2a1b263b8c fix: WDA startup flakiness - warmup + connection drop message (#40)
* feat(ios): add simulator management package

* feat(testrun): add iOS platform path (simctl launch + direct TCP)

* feat(cli): add --ios-device flag and IosDevice option

* feat(sdk-ios): add Kotlin Native iOS SDK (TCP agent + POSIX socket + dispatch pauser)

* feat(folio-ios): wire SanderlingIos.start() in MainViewController

* feat(folio-ios): add test-ios justfile recipe

* fix(sdk-ios): remove unavailable C macros; manual byte swap + no-cast warnings

* fix(testrun): simctl-first launch order for iOS; Maestro init after SDK connects

* feat(proto): add env map to LaunchRequest

* feat(driver): add env param to Launch interface + all implementations

* feat(testrun): launch iOS app via XCTest with env vars instead of simctl

* feat(sidecar): add IosDriverBackend using Maestro IOSDriver + env pass-through

* feat(sidecar): wire env map in DriverService + IosDriverBackend in Main

* fix(sidecar): use LocalIOSDevice (WDA+simctl) + stop before relaunch

* fix(sidecar): include exception type in gRPC error description

* fix(sidecar): pick free WDA port instead of hardcoded 9100

Use SocketUtils.nextFreePort to pick a free port in the 22000-23000 range
rather than hardcoding 9100, which only worked if a previous WDA session
left a listener there.

* fix(sdk-ios): check semaphore wait result and throw on snapshot timeout

dispatch_semaphore_wait returns nonzero on timeout; ignoring the return
value caused pauseAndSnapshot to silently return an empty map, sending a
garbage empty STATE frame to the host. Now throws so the agent loop
reconnects instead.

* fix(folio-ios): register snapshot extractors before starting agent

SanderlingIos.start() was called before the snapshot objects were
initialized, so a PAUSE message arriving early produced an empty snapshot.
Move start() to after all extractors are registered.

* chore(ios): remove dead LaunchApp function

LaunchApp had no callers since bff3a49 switched iOS launch to go through
the sidecar driver. Remove the dead code and unused os import.

* test(ios): add unit tests for pickSimulator and iOS flag parsing

Tests for all pickSimulator branches (by name, by UDID, unknown, empty
list, iPhone preference, fallback to first). Also tests BootedUDID on a
canceled context and verifies --platform ios and --ios-device flags are
accepted by parseTestArgs.

* fix(ios): propagate error from BootedUDID instead of silently swallowing

* fix(sidecar): IosDriverBackend.healthy() returns true; WDA liveness checked in open()

* fix(sidecar): warm up WDA after health check to absorb startup race

* fix(runner): surface clear message on WDA connection drop

* docs(testrun): note WDA warmup location above WaitForHealth

* fix(sidecar): extract warmup + add one-shot WDA reconnect on IOException

* fix(runner): fatal on permanent WDA drop during hierarchy fetch

* fix(sidecar): walk cause chain in withReconnect to catch Maestro-wrapped IOException

* fix(sidecar): explicit Unit return in pressKey and waitForIdle withReconnect lambdas

* fix(sidecar): serialize WDA reconnect with ReentrantLock to prevent concurrent xcodebuild races

* fix web examples package config

* Revert "fix web examples package config"

This reverts commit 70c10ade27.

* chore: gitignore built sanderling binary

* fix(hierarchy): parse iOS [x1,y1][x2,y2] bounds + match iOS merged desc labels

* refactor(folio-spec): replace bloated spec with two focused properties

Login is opportunistic. Two concrete properties:
1. every new account starts with balance 0
2. every new txn changes ledger balance by exactly its signed amount

Actions: directed login -> addAccount -> addTxn -> back weighted flow.
2026-04-25 17:39:39 +07:00
..
2026-04-20 16:04:20 +07:00

Folio

A minimal Kotlin Multiplatform personal-ledger app: login with demo credentials, create accounts, add credits and debits. Shared UI across Android, iOS, and Web via Compose Multiplatform. Doubles as the example sanderling runs its property-based specs against.

Stack

  • Kotlin Multiplatform + Compose Multiplatform (shared UI)
  • kotlinx.serialization for file-backed persistence
  • kotlinx.coroutines for state flows
  • sanderling sdk-android for harness integration on Android

Prerequisites

  • just
  • JDK 17
  • Android SDK (auto-discovered under $ANDROID_HOME, ~/Library/Android/sdk, or the Homebrew cask)
  • Xcode 16+ and xcodegen (brew install xcodegen) for iOS

Android

just install      # build + install on a booted emulator / device
just uninstall
just clean

iOS

just ios                          # default device: iPhone 17 Pro
IOS_DEVICE="iPhone 15" just ios   # pick a different simulator

just ios regenerates iosApp/iosApp.xcodeproj from iosApp/project.yml, builds the KMP framework, links it into the SwiftUI host, installs, and launches.

Demo credentials

email:    [email protected]
password: ledger123

Run a sanderling test (Android)

just test

If no device is connected, sanderling boots the single AVD it finds. With multiple AVDs, pick one:

AVD=Pixel_7 just test

Persistent settings can live in .env alongside the justfile:

AVD=Pixel_7
DURATION=5m

Traces land in ./sanderling/runs/<timestamp>/.

How it connects to sanderling

  • composeApp/src/androidMain/.../FolioApplication.kt calls Sanderling.start(this) and registers snapshot extractors (logged_in, account_count, total_balance, route)
  • sanderling/spec.ts imports @sanderling/spec, reads those snapshots, asserts properties, and weights the actions the fuzzer picks from
  • just test invokes sanderling test against the installed APK