build_test 3.3.4

build_test: ^3.3.4 copied to clipboard

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Test helpers for build_runner builders.

• In-memory builds
• In-memory builds with real sources
• Resolving source code

In-memory builds #

The testBuilders method provides a way to run builds in memory for small, self contained tests. See the test folder in the build package for examples.

In-memory builds with real sources #

To pass sources on disk to testBuilders, create a TestReaderWriter.

You can write individual sources to it from a PackageAssetReader, or write all sources to it with loadIsolateSources:

final readerWriter = TestReaderWriter(rootPackage: 'test_package');
await readerWriter.testing.loadIsolateSources();
testBuilder(
  yourBuilder,
  {'test_package|lib/a.dart': '''
import 'package:real_package/annotations.dart';

@RealAnnotation()
class TestClass {}
'''},
  readerWriter: readerWriter,
);

Resolving source code #

Use resolveAsset or resolveSource to resolve code with the analyzer:

test('should resolve a simple dart file', () async {
  var resolver = await resolveSource(r'''
    library example;

    class Foo {}
  ''');
  var libExample = resolver.getLibraryByName('example');
  expect(libExample.getType('Foo'), isNotNull);
});