buildStepForTestAsset function

Implementation

@visibleForTesting
/// Creates an in-memory [InMemoryBuildStep] for the given [asset].
///
/// [allowedExtensions] controls which output extensions this build step will
/// accept when writing files. Any [extraAssets] will be scanned and added to
/// the internal assets graph so that references between assets are available
/// to the resolver and can be resolved during tests.
InMemoryBuildStep buildStepForTestAsset(
  Asset asset, {
  Set<String> allowedExtensions = const {'.g.dart'},
  Set<String> includePackages = const {},
  List<Asset> extraAssets = const [],
}) {
  final fileResolver = getTestFileResolver();
  final graph = AssetsGraph('hash');
  final scanner = ReferencesScanner(graph, fileResolver);
  scanDartSdkAndPackages(scanner, packages: includePackages);
  for (final extraAsset in extraAssets) {
    scanner.scan(extraAsset);
  }
  scanner.scan(asset);
  final resolver = Resolver.from(graph, fileResolver, SourceParser());
  return InMemoryBuildStep(asset, resolver, allowedExtensions: allowedExtensions);
}