115 lines
4.8 KiB
Rust
115 lines
4.8 KiB
Rust
// ignore-windows: File handling is not implemented yet
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// compile-flags: -Zmiri-disable-isolation
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use std::fs::{File, remove_file, rename};
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use std::io::{Read, Write, ErrorKind, Result, Seek, SeekFrom};
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use std::path::{PathBuf, Path};
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fn test_metadata(bytes: &[u8], path: &Path) -> Result<()> {
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// Test that the file metadata is correct.
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let metadata = path.metadata()?;
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// `path` should point to a file.
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assert!(metadata.is_file());
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// The size of the file must be equal to the number of written bytes.
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assert_eq!(bytes.len() as u64, metadata.len());
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Ok(())
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}
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fn main() {
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let tmp = std::env::temp_dir();
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let filename = PathBuf::from("miri_test_fs.txt");
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let path = tmp.join(&filename);
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let symlink_path = tmp.join("miri_test_fs_symlink.txt");
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let bytes = b"Hello, World!\n";
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// Clean the paths for robustness.
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remove_file(&path).ok();
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remove_file(&symlink_path).ok();
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// Test creating, writing and closing a file (closing is tested when `file` is dropped).
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let mut file = File::create(&path).unwrap();
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// Writing 0 bytes should not change the file contents.
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file.write(&mut []).unwrap();
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assert_eq!(file.metadata().unwrap().len(), 0);
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file.write(bytes).unwrap();
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assert_eq!(file.metadata().unwrap().len(), bytes.len() as u64);
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// Test opening, reading and closing a file.
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let mut file = File::open(&path).unwrap();
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let mut contents = Vec::new();
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// Reading 0 bytes should not move the file pointer.
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file.read(&mut []).unwrap();
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// Reading until EOF should get the whole text.
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file.read_to_end(&mut contents).unwrap();
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assert_eq!(bytes, contents.as_slice());
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// Cloning a file should be successful.
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let file = File::open(&path).unwrap();
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let mut cloned = file.try_clone().unwrap();
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// Reading from a cloned file should get the same text.
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let mut contents = Vec::new();
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cloned.read_to_end(&mut contents).unwrap();
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assert_eq!(bytes, contents.as_slice());
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let mut file = File::open(&path).unwrap();
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// Test that seeking to the beginning and reading until EOF gets the text again.
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file.seek(SeekFrom::Start(0)).unwrap();
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let mut contents = Vec::new();
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file.read_to_end(&mut contents).unwrap();
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assert_eq!(bytes, contents.as_slice());
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// Test seeking relative to the end of the file.
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file.seek(SeekFrom::End(-1)).unwrap();
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let mut contents = Vec::new();
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file.read_to_end(&mut contents).unwrap();
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assert_eq!(&bytes[bytes.len() - 1..], contents.as_slice());
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// Test seeking relative to the current position.
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file.seek(SeekFrom::Start(5)).unwrap();
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file.seek(SeekFrom::Current(-3)).unwrap();
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let mut contents = Vec::new();
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file.read_to_end(&mut contents).unwrap();
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assert_eq!(&bytes[2..], contents.as_slice());
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// Test that metadata of an absolute path is correct.
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test_metadata(bytes, &path).unwrap();
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// Test that metadata of a relative path is correct.
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std::env::set_current_dir(&tmp).unwrap();
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test_metadata(bytes, &filename).unwrap();
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// Creating a symbolic link should succeed.
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std::os::unix::fs::symlink(&path, &symlink_path).unwrap();
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// Test that the symbolic link has the same contents as the file.
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let mut symlink_file = File::open(&symlink_path).unwrap();
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let mut contents = Vec::new();
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symlink_file.read_to_end(&mut contents).unwrap();
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assert_eq!(bytes, contents.as_slice());
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// Test that metadata of a symbolic link is correct.
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test_metadata(bytes, &symlink_path).unwrap();
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// Test that the metadata of a symbolic link is correct when not following it.
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assert!(symlink_path.symlink_metadata().unwrap().file_type().is_symlink());
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// Removing symbolic link should succeed.
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remove_file(&symlink_path).unwrap();
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// Removing file should succeed.
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remove_file(&path).unwrap();
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// Renaming a file should succeed.
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let path1 = tmp.join("rename_source.txt");
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let path2 = tmp.join("rename_destination.txt");
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// Clean files for robustness.
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remove_file(&path1).ok();
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remove_file(&path2).ok();
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let file = File::create(&path1).unwrap();
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drop(file);
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rename(&path1, &path2).unwrap();
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assert_eq!(ErrorKind::NotFound, path1.metadata().unwrap_err().kind());
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assert!(path2.metadata().unwrap().is_file());
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remove_file(&path2).unwrap();
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// The two following tests also check that the `__errno_location()` shim is working properly.
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// Opening a non-existing file should fail with a "not found" error.
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assert_eq!(ErrorKind::NotFound, File::open(&path).unwrap_err().kind());
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// Removing a non-existing file should fail with a "not found" error.
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assert_eq!(ErrorKind::NotFound, remove_file(&path).unwrap_err().kind());
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// Reading the metadata of a non-existing file should fail with a "not found" error.
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assert_eq!(ErrorKind::NotFound, test_metadata(bytes, &path).unwrap_err().kind());
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}
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