Slow lane: a target boots a real simulator and emulator, and off shuts both down #372

Part of #359.

Scope

After this PR the slow lane proves the warm pool on real devices: a target boots a real iOS simulator and a real Android emulator ahead of any lease, the first lease of each is granted without a boot, and with the pool off a released device of each platform ends shut down. Nothing changes for a user; this is the proof the feature's hardware lines ask for.

In short

The fast lane runs every other task against fake drivers. Two things only a real device can prove: that a target's create-and-boot path works end to end through simctl and the emulator, and that the Android snapshot restore followed by the pool's shutdown leaves an emulator that boots cleanly next time.

flowchart LR
  A[start daemon with targets:<br/>1 iPhone, 1 Android] --> B[wait for both device.ready]
  B --> C[lease each: no booting line]
  C --> D[release both]
  D --> E[restart with enabled: false]
  E --> F[release-> both shutdown]
  F --> G[lease each again: boots cleanly]

If this goes wrong: the slow lane is red while the fast lane is green, which is exactly the point.

Technical spec

File and line references are to main at 4a52f6e, after #371.

Modules touched

flowchart LR
  classDef new fill:#cfe3f7,stroke:#2f5f8f
  T[e2e/slow-warm-pool.test.ts]:::new --> D[daemon over the unix socket]
  D --> IOS[iOS driver, simctl]
  D --> AND[Android driver, emulator]

• New e2e/slow-warm-pool.test.ts, in the shape of e2e/slow-ios-smoke.test.ts: a daemon with a temporary SIMLOCK_HOME, config with one iOS and one Android target of count 1 on the newest installed runtime of each, maxConcurrentBoots: 2. It waits for two device.ready events, leases each by model with --json and asserts no booting progress line, releases both and asserts each is ready again (iOS after a rewarm boot, Android after its restore). It then restarts the daemon with warmPool.enabled: false, leases and releases each, asserts both end shutdown, and leases each once more to prove the next boot is clean.
• scripts/slow-e2e.sh: the new file joins the lane it runs (no new lane). The test skips with a named reason when either platform has no installed runtime or image, as the existing slow tests do.
• Docs: docs/internal/ARCHITECTURE.md test-lanes paragraph lists the file.

Contract and event changes

None.

Rules in play

• testing.md rules 1 and 2: each assertion names the event or output it checks.
• delivery.md rule on real devices: this runs only through scripts/slow-e2e.sh, never in CI.
• safety.md rule 1: the test's devices live under the temporary root and are deleted by its teardown.

Tests

• On a Mac with an iOS runtime and an Android system image: a target of one per platform ends with one ready simulator and one ready emulator before any lease.
• On a Mac with an iOS runtime and an Android system image: the first lease of each targeted model carries no booting progress.
• On a Mac with an iOS runtime and an Android system image: with warmPool.enabled: false, a released simulator and a released emulator are both shutdown, and each boots on the next lease.

Done when

• On a Mac with an iOS runtime and an Android system image: scripts/slow-e2e.sh runs e2e/slow-warm-pool.test.ts green, and its log names the two device.ready events before the first lease.
• On a machine without one of the platforms, the test skips with a reason naming the missing platform.

Out of scope

• Any behaviour change. A failure here is a bug in an earlier task, filed as bug:new.

Depends on

• The warm pool in status, doctor, one event, and the console #371

Approval

• Approved for delivery

Written by an agent.