pkgs/jnigen/test/generation_test.dart

// Copyright (c) 2025, 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:jnigen/jnigen.dart';
import 'package:jnigen/src/logging/logging.dart';
import 'package:jnigen/src/summary/summary.dart';
import 'package:path/path.dart';
import 'package:test/test.dart';

void expectBuildSummarizerTriggered(List<String> log, {bool triggered = true}) {
  final matcher = contains(predicate<String>(
    (msg) =>
        msg.contains('ApiSummarizer.jar exists') ||
        msg.contains('Building ApiSummarizer component') ||
        msg.contains('Rebuilding ApiSummarizer component'),
  ));
  expect(log, triggered ? matcher : isNot(matcher));
}

void main() {
  test('Warn if non-jnigen-generated files exist in directory', () async {
    final root = await Directory.current.createTemp();
    final nonGenerated =
        await File.fromUri(root.uri.resolve('non_gen.dart')).create();
    await nonGenerated.writeAsString('void main() {}');
    final generated = await File.fromUri(root.uri.resolve('gen.dart')).create();
    await generated
        .writeAsString('// AUTO GENERATED BY JNIGEN 1.2.3. DO NOT EDIT!\n');
    final sourcePath =
        join(Directory.current.path, 'test', 'simple_package_test', 'java');
    print(sourcePath);
    final logMessages = <String>[];
    final logSub = log.onRecord.listen((r) => logMessages.add(r.message));
    await expectLater(
      () => JniGenerator(
        input: Input(
          classes: ['com.github.dart_lang.jnigen.simple_package'],
          sourcePath: [Uri.directory(sourcePath)],
        ),
        output: Output(
          dart: DartOutput(
            path: root.uri,
            structure: OutputStructure.packageStructure,
          ),
        ),
      ).generate(),
      throwsA(allOf([
        isA<StateError>(),
        predicate(
            (error) => error.toString().contains('not generated by JNIgen')),
        predicate((error) => error.toString().contains('non_gen.dart')),
      ])),
    );
    await logSub.cancel();
    expectBuildSummarizerTriggered(logMessages, triggered: true);
    await root.delete(recursive: true);
  });

  test('buildSummarizerIfNotExists is skipped if summarizerCommand is passed',
      () async {
    final root = await Directory.current.createTemp();
    final fakeSummarizer = File(join(root.path, 'fake_summarizer.dart'));
    const errorMessage = 'Custom summarizer error output';
    await fakeSummarizer.writeAsString('''
import 'dart:io';

void main() {
  stderr.writeln('$errorMessage');
  exit(1);
}
''');
    final outDir = Directory(join(root.path, 'out'))..createSync();

    final config = JniGenerator(
      input: Input(
        classes: ['com.example.Test'],
        summarizerCommand: '${Platform.executable} ${fakeSummarizer.path}',
      ),
      output: Output(
        dart: DartOutput(
          path: outDir.uri,
          structure: OutputStructure.packageStructure,
        ),
      ),
    );

    final logMessages = <String>[];
    final logSub = log.onRecord.listen((r) => logMessages.add(r.message));
    try {
      await getSummary(config);
      fail('Expected SummaryParseException');
    } on SummaryParseException catch (e) {
      expect(e.stderr, contains(errorMessage));
    }
    await logSub.cancel();

    expectBuildSummarizerTriggered(logMessages, triggered: false);
    expect(
      logMessages,
      contains(predicate<String>(
          (msg) => msg.contains('execute ${Platform.executable}'))),
    );
    await root.delete(recursive: true);
  });
}