message: test fs::read_link surface function
diff: @@ -8,7 +8,8 @@ extern crate libc;
  use std::ffi::CString;
  use std::fs::{
  - create_dir, read_dir, remove_dir, remove_dir_all, remove_file, rename, File, OpenOptions,
  + create_dir, read_dir, read_link, remove_dir, remove_dir_all, remove_file, rename, File,
  + OpenOptions,
  };
  use std::io::{Error, ErrorKind, Read, Result, Seek, SeekFrom, Write};
  use std::path::{Path, PathBuf};
  @@ -317,10 +318,12 @@ fn test_symlink() {
  assert_eq!(Error::last_os_error().kind(), ErrorKind::NotFound);
  }
  - // Test that metadata of a symbolic link is correct.
  + // Test that metadata of a symbolic link (i.e., the file it points to) is correct.
  check_metadata(bytes, &symlink_path).unwrap();
  // Test that the metadata of a symbolic link is correct when not following it.
  assert!(symlink_path.symlink_metadata().unwrap().file_type().is_symlink());
  + // Check that we can follow the link.
  + assert_eq!(read_link(&symlink_path).unwrap(), path);
  // Removing symbolic link should succeed.
  remove_file(&symlink_path).unwrap();
  