pkg/vm/test/transformations/to_string_transformer_test.dart

// Copyright (c) 2021, 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:kernel/ast.dart';
import 'package:kernel/kernel.dart';
import 'package:kernel/target/targets.dart';
import 'package:kernel/verifier.dart';
import 'package:test/test.dart';
import 'package:vm/modular/target/vm.dart';
import 'package:vm/transformations/to_string_transformer.dart'
    show transformComponent;

import '../common_test_utils.dart';

final Uri pkgVmUri = Platform.script.resolve('../..');

runTestCase(List<String> packageUris, String expectationName) async {
  final target = new VmTarget(new TargetFlags());
  final testCasesUri = pkgVmUri.resolve(
    'testcases/transformations/to_string_transformer/',
  );
  final packagesFileUri = testCasesUri.resolve(
    '.dart_tool/package_config.json',
  );
  Component component = await compileTestCaseToKernelProgram(
    Uri.parse('package:to_string_transformer_test/main.dart'),
    target: target,
    packagesFileUri: packagesFileUri,
  );

  transformComponent(component, packageUris);
  verifyComponent(
    target,
    VerificationStage.afterModularTransformations,
    component,
  );

  final actual = kernelLibraryToString(component.mainMethod!.enclosingLibrary);

  compareResultWithExpectationsFile(
    testCasesUri.resolve(expectationName),
    actual,
  );
}

main() {
  group('to-string-transformer', () {
    runTestCase(['package:foo'], 'not_transformed');
    runTestCase([
      'package:foo',
      'package:to_string_transformer_test',
    ], 'transformed');
  });
}