tests/lib/isolate/nnbd_spawnuri_autodetect_helper.dart

// Copyright (c) 2020, the Dart project authors.  Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

import "dart:io";
import "package:async_helper/async_minitest.dart";

void generateIsolateSource(String filePath, String version) {
  File isolateSource = new File("$filePath");
  isolateSource.writeAsStringSync('''
    // @dart=$version
    library SpawnUriIsolate;
    main(List<String> args, replyTo) {
      var data = args[0];
      try {
        int x = null as int;
        replyTo.send(\'re: weak\');
      } catch (ex) {
        replyTo.send(\'re: strong\');
      }
    }
  ''');
}

void generateOutput(String sourcePath, String outPath, String type) {
  var exec = Platform.resolvedExecutable;
  var args = <String>[];
  args.add("--snapshot-kind=$type");
  args.add("--snapshot=$outPath");
  args.add(sourcePath);
  var result = Process.runSync(exec, args);
}

void generateKernel(String sourcePath, String outPath) {
  generateOutput(sourcePath, outPath, "kernel");
}

void generateAppJIT(String sourcePath, String outPath) {
  generateOutput(sourcePath, outPath, "app-jit");
}

void testNullSafetyMode(
    String filePath, String version, String uri, String expected) {
  File mainIsolate = new File(filePath);
  mainIsolate.writeAsStringSync('''
      // @dart=$version
      library spawn_tests;

      import \'dart:isolate\';

      void main() async {
        const String debugName = \'spawnedIsolate\';
        final exitPort = ReceivePort();
        final port = new ReceivePort();
        port.listen((msg) {
            print(msg);
            port.close();
        });

        final isolate = await Isolate.spawnUri(
          Uri.parse(\'$uri\'),
            [\'re: hi\'],
            port.sendPort,
            paused: false,
            debugName: debugName,
            onExit: exitPort.sendPort);

        // Explicitly await spawned isolate exit to enforce main isolate not
        // completing (and the stand-alone runtime exiting) before the spawned
        // isolate is done.
        await exitPort.first;
      }
  ''');
  var exec = Platform.resolvedExecutable;
  var args = <String>[];
  args.add(mainIsolate.path);
  var result = Process.runSync(exec, args);
  expect(result.stdout.contains('$expected'), true);
}