tests/lib/isolate/detect_nullsafety_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 mainIsolate = new File(filePath);
  mainIsolate.writeAsStringSync('''
    // @dart=$version
    void main() {
      try {
        int x = null as int;
        print("Weak Mode");
      } catch (ex) {
        print("Strong Mode");
      }
    }
  ''');
}

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("--enable-experiment=non-nullable");
  args.add(sourcePath);
  var result = Process.runSync(exec, args);
  print('snapshot $type stdout: ${result.stdout}');
  print('snapshot $type stderr: ${result.stderr}');
}

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 expected) {
  var exec = Platform.resolvedExecutable;
  var args = <String>[];
  args.add("--enable-experiment=non-nullable");
  args.add(filePath);
  var result = Process.runSync(exec, args);
  print('test stdout: ${result.stdout}');
  print('test stderr: ${result.stderr}');
  expect(result.stdout.contains('$expected'), true);
}

void testNullSafetyMode1(String filePath, String expected) {
  var exec = Platform.resolvedExecutable;
  var args = <String>[];
  args.add(filePath);
  var result = Process.runSync(exec, args);
  expect(result.stdout.contains('$expected'), true);
}