feat(worker): accept platform options under android, deprecate androidPriority

[edusperoni]

What changed

new Worker(url, options) now takes its Android-specific settings under an
android namespace object, so future platform options have a place to live
instead of accumulating as androidSomething keys on the top level.

const worker = new Worker("./worker.js", {
  android: { priority: "lowest" },
});

android.priority accepts the camelCase android.os.Process.THREAD_PRIORITY_*
names — "lowest", "background", "lessFavorable", "default",
"moreFavorable", "foreground", "display", "urgentDisplay", "video",
"audio", "urgentAudio" — or a raw nice value clamped to [-20, 19], and is
applied with Process.setThreadPriority on the worker thread.

Deprecation

options.androidPriority keeps working unchanged. Passing it logs a one-time
per-process warning pointing at android.priority. When both keys are present,
android.priority wins and the legacy value is not validated.

Validation

Input	Result
android present and not an object (null counts as absent, as for a WebIDL dictionary)	TypeError
android.priority neither a recognized name nor a number	TypeError naming "android.priority"
android.priority an unknown string	TypeError naming "android.priority"
android.priority a number outside [-20, 19]	clamped
unknown keys inside android	ignored (forward compatibility)
androidPriority with an unusable value	unchanged (throws, as before)

The thrown value is a genuine TypeError instance, so e instanceof TypeError
holds in JS — NativeScriptException gained an overload that carries an
already-built JS error value through ReThrowToV8 unchanged.

Along the way, an options getter that throws now stops construction: the
->Get(...).ToLocal(...) result was folded into the "no option given" branch,
so the pending exception was dropped and the worker started at the default
priority.

Verification

./gradlew runtestsAndVerifyResults -Pabis=arm64-v8a, Debug, API 33 emulator.

Metric	Count
tests	1223
failures	0
errors	0
skipped	4

That is the 1207-test baseline plus the 16 specs added here; the skips are unchanged.

Mirrors NativeScript/ios#470.

Deviations from the iOS PR

• Android's priority surface is a nice value, not NSQualityOfService, so
  android.priority also accepts numbers and the "must be a string" rejection
  becomes "neither a recognized name nor a number".
• No std::optional sentinel fix is needed: Android's "unset" default is
  THREAD_PRIORITY_BACKGROUND (10), which no sentinel collides with.
• The specs read the thread's nice value back with
  android.os.Process.getThreadPriority(android.os.Process.myTid()) from inside
  the worker. Only the non-negative names are asserted exactly — lowering a
  thread's nice value needs a privilege the app may not hold — with the negative
  names covered by starting a worker instead.

Follow-ups

• @nativescript/core typings for WorkerOptions need android?: { priority?: ... },
  with androidPriority marked @deprecated.
• A stacked PR adds resourceLimits.

Summary by CodeRabbit

• New Features

  • Added support for configuring Android worker thread priority with named or numeric values.
  • Priority settings now support negative values and safe range clamping.
  • Nested Android options take precedence over legacy priority settings.

• Bug Fixes

  • Invalid priority values now produce clear JavaScript TypeError errors.
  • Legacy priority configuration remains supported with a deprecation notice.
  • Errors encountered while reading worker options are now preserved and reported correctly.

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📒 Files selected for processing (2)

• test-app/app/src/main/assets/app/tests/testWorkerOptions.js
• test-app/runtime/src/main/cpp/CallbackHandlers.cpp

🚧 Files skipped from review as they are similar to previous changes (2)

• test-app/app/src/main/assets/app/tests/testWorkerOptions.js
• test-app/runtime/src/main/cpp/CallbackHandlers.cpp

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---

📝 Walkthrough

Walkthrough

The runtime supports nested Android worker priority options with validation, precedence, clamping, and error preservation. The test app adds worker-based coverage for valid, deprecated, absent, null, and invalid configurations.

Changes

Worker priority options

Layer / File(s)	Summary
Priority resolution and error propagation test-app/runtime/src/main/cpp/NativeScriptException.h, test-app/runtime/src/main/cpp/NativeScriptException.cpp, test-app/runtime/src/main/cpp/CallbackHandlers.cpp	The runtime resolves named and numeric Android priorities, supports deprecated androidPriority, applies precedence and clamping, and rethrows JavaScript errors with their original types.
Priority behavior tests test-app/app/src/main/assets/app/tests/workerOptionsPriorityWorker.js, test-app/app/src/main/assets/app/tests/testWorkerOptions.js, test-app/app/src/main/assets/app/mainpage.js	The test app reports worker priority, validates option behavior and errors, manages worker cleanup, and includes the new test module in the runner.

Priority: ⬇️ Low

Estimated code review effort: 3 (Moderate) | ~25 minutes

Change: Feature

Sequence Diagram(s)

sequenceDiagram
  participant testWorkerOptions
  participant NewThreadCallback
  participant workerOptionsPriorityWorker
  testWorkerOptions->>NewThreadCallback: start worker with Android options
  NewThreadCallback->>workerOptionsPriorityWorker: create worker with resolved priority
  workerOptionsPriorityWorker-->>testWorkerOptions: post runtime priority
  testWorkerOptions->>testWorkerOptions: assert priority or propagated error

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🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 50.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 12 functions across 6 files.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly summarizes the main change: support platform options under android and deprecate androidPriority.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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Actionable comments posted: 1

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Inline comments:
In `@test-app/runtime/src/main/cpp/CallbackHandlers.cpp`:
- Line 1152: Update ClampWorkerPriority to read the input with NumberValue,
handle non-finite values, clamp the resulting double to the -20..19 range before
converting it to int, and preserve the default behavior for invalid values. Add
regression tests covering large positive and negative priorities.

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📒 Files selected for processing (6)

• test-app/app/src/main/assets/app/mainpage.js
• test-app/app/src/main/assets/app/tests/testWorkerOptions.js
• test-app/app/src/main/assets/app/tests/workerOptionsPriorityWorker.js
• test-app/runtime/src/main/cpp/CallbackHandlers.cpp
• test-app/runtime/src/main/cpp/NativeScriptException.cpp
• test-app/runtime/src/main/cpp/NativeScriptException.h

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