117 lines
3.2 KiB
Rust
117 lines
3.2 KiB
Rust
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#![warn(rust_2018_idioms)]
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#![cfg(all(feature = "full", not(target_os = "wasi")))] // WASI does not support all fs operations
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use tokio::fs;
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use std::io::Write;
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use tempfile::tempdir;
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#[tokio::test]
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#[cfg_attr(miri, ignore)] // No `linkat` in miri.
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async fn test_hard_link() {
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let dir = tempdir().unwrap();
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let src = dir.path().join("src.txt");
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let dst = dir.path().join("dst.txt");
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std::fs::File::create(&src)
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.unwrap()
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.write_all(b"hello")
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.unwrap();
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fs::hard_link(&src, &dst).await.unwrap();
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std::fs::File::create(&src)
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.unwrap()
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.write_all(b"new-data")
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.unwrap();
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let content = fs::read(&dst).await.unwrap();
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assert_eq!(content, b"new-data");
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// test that this is not a symlink:
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assert!(fs::read_link(&dst).await.is_err());
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}
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#[cfg(unix)]
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#[tokio::test]
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async fn test_symlink() {
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let dir = tempdir().unwrap();
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let src = dir.path().join("src.txt");
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let dst = dir.path().join("dst.txt");
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std::fs::File::create(&src)
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.unwrap()
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.write_all(b"hello")
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.unwrap();
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fs::symlink(&src, &dst).await.unwrap();
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std::fs::File::create(&src)
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.unwrap()
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.write_all(b"new-data")
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.unwrap();
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let content = fs::read(&dst).await.unwrap();
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assert_eq!(content, b"new-data");
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let read = fs::read_link(dst.clone()).await.unwrap();
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assert!(read == src);
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let symlink_meta = fs::symlink_metadata(dst.clone()).await.unwrap();
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assert!(symlink_meta.file_type().is_symlink());
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}
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#[tokio::test]
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#[cfg_attr(miri, ignore)] // No `linkat` in miri.
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async fn test_hard_link_error_source_not_found() {
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let dir = tempdir().unwrap();
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let src = dir.path().join("nonexistent.txt");
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let dst = dir.path().join("dst.txt");
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let err = fs::hard_link(&src, &dst).await.unwrap_err();
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assert_eq!(err.kind(), std::io::ErrorKind::NotFound);
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}
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#[tokio::test]
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#[cfg_attr(miri, ignore)] // No `linkat` in miri.
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async fn test_hard_link_error_destination_already_exists() {
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let dir = tempdir().unwrap();
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let src = dir.path().join("src.txt");
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let dst = dir.path().join("dst.txt");
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// Create source file
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std::fs::write(&src, b"source content").unwrap();
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// Create destination file
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std::fs::write(&dst, b"destination content").unwrap();
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// Attempt to create hard link when destination already exists
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let err = fs::hard_link(&src, &dst).await.unwrap_err();
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assert_eq!(err.kind(), std::io::ErrorKind::AlreadyExists);
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}
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#[tokio::test]
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#[cfg_attr(miri, ignore)] // No `linkat` in miri.
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async fn test_hard_link_error_source_is_directory() {
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let dir = tempdir().unwrap();
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let src_dir = dir.path().join("src_directory");
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let dst = dir.path().join("dst.txt");
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// Create source directory
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fs::create_dir(&src_dir).await.unwrap();
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// Attempt to create hard link from a directory
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// On most systems, hard linking directories is not allowed
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let err = fs::hard_link(&src_dir, &dst).await.unwrap_err();
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// Different platforms return different error kinds
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#[cfg(unix)]
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assert!(
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err.kind() == std::io::ErrorKind::PermissionDenied
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|| err.kind() == std::io::ErrorKind::Other
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);
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#[cfg(windows)]
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assert_eq!(err.kind(), std::io::ErrorKind::PermissionDenied);
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}
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