assertPreviewPathIsFile function

@visibleForTesting void assertPreviewPathIsFile(String resolvedFilePath, { FileSystemEntityType resolveEntityType(String path)?, })

Throws when resolvedFilePath does not refer to a readable file.

Implementation

@visibleForTesting
void assertPreviewPathIsFile(
  String resolvedFilePath, {
  FileSystemEntityType Function(String path)? resolveEntityType,
}) {
  final entityType = (resolveEntityType ??
      (path) => FileSystemEntity.typeSync(path, followLinks: false))(
    resolvedFilePath,
  );
  switch (entityType) {
    case FileSystemEntityType.file:
      return;
    case FileSystemEntityType.notFound:
      throw PreviewException('File not found: $resolvedFilePath');
    case FileSystemEntityType.directory:
    case FileSystemEntityType.link:
    case FileSystemEntityType.pipe:
    case FileSystemEntityType.unixDomainSock:
      throw PreviewException('Path is not a file: $resolvedFilePath');
  }
}