use std::fs; use std::io::Cursor; use std::os::unix::prelude::MetadataExt; use std::path::Path; use std::sync::Arc; use tempfile::TempDir; use crate::blobservice::BlobService; use crate::directoryservice::DirectoryService; use crate::pathinfoservice::PathInfoService; use crate::proto::{DirectoryNode, FileNode, PathInfo}; use crate::tests::fixtures; use crate::tests::utils::{gen_blob_service, gen_directory_service, gen_pathinfo_service}; use crate::{proto, FUSE}; const BLOB_A_NAME: &str = "00000000000000000000000000000000-test"; const BLOB_B_NAME: &str = "55555555555555555555555555555555-test"; const SYMLINK_NAME: &str = "11111111111111111111111111111111-test"; const SYMLINK_NAME2: &str = "44444444444444444444444444444444-test"; const DIRECTORY_WITH_KEEP_NAME: &str = "22222222222222222222222222222222-test"; const DIRECTORY_COMPLICATED_NAME: &str = "33333333333333333333333333333333-test"; fn setup_and_mount, F>( mountpoint: P, setup_fn: F, ) -> Result where F: Fn(Arc, Arc, Arc), { let blob_service = gen_blob_service(); let directory_service = gen_directory_service(); let path_info_service = gen_pathinfo_service(blob_service.clone(), directory_service.clone()); setup_fn( blob_service.clone(), directory_service.clone(), path_info_service.clone(), ); let fs = FUSE::new(blob_service, directory_service, path_info_service); fuser::spawn_mount2(fs, mountpoint, &[]) } fn populate_blob_a( blob_service: Arc, _directory_service: Arc, path_info_service: Arc, ) { // Upload BLOB_A let mut bw = blob_service.open_write(); std::io::copy(&mut Cursor::new(fixtures::BLOB_A.to_vec()), &mut bw) .expect("must succeed uploading"); bw.close().expect("must succeed closing"); // Create a PathInfo for it let path_info = PathInfo { node: Some(proto::Node { node: Some(proto::node::Node::File(FileNode { name: BLOB_A_NAME.into(), digest: fixtures::BLOB_A_DIGEST.clone().into(), size: fixtures::BLOB_A.len() as u32, executable: false, })), }), ..Default::default() }; path_info_service.put(path_info).expect("must succeed"); } fn populate_blob_b( blob_service: Arc, _directory_service: Arc, path_info_service: Arc, ) { // Upload BLOB_B let mut bw = blob_service.open_write(); std::io::copy(&mut Cursor::new(fixtures::BLOB_B.to_vec()), &mut bw) .expect("must succeed uploading"); bw.close().expect("must succeed closing"); // Create a PathInfo for it let path_info = PathInfo { node: Some(proto::Node { node: Some(proto::node::Node::File(FileNode { name: BLOB_B_NAME.into(), digest: fixtures::BLOB_B_DIGEST.clone().into(), size: fixtures::BLOB_B.len() as u32, executable: false, })), }), ..Default::default() }; path_info_service.put(path_info).expect("must succeed"); } fn populate_symlink( _blob_service: Arc, _directory_service: Arc, path_info_service: Arc, ) { // Create a PathInfo for it let path_info = PathInfo { node: Some(proto::Node { node: Some(proto::node::Node::Symlink(proto::SymlinkNode { name: SYMLINK_NAME.into(), target: BLOB_A_NAME.into(), })), }), ..Default::default() }; path_info_service.put(path_info).expect("must succeed"); } /// This writes a symlink pointing to /nix/store/somewhereelse, /// which is the same symlink target as "aa" inside DIRECTORY_COMPLICATED. fn populate_symlink2( _blob_service: Arc, _directory_service: Arc, path_info_service: Arc, ) { // Create a PathInfo for it let path_info = PathInfo { node: Some(proto::Node { node: Some(proto::node::Node::Symlink(proto::SymlinkNode { name: SYMLINK_NAME2.into(), target: "/nix/store/somewhereelse".into(), })), }), ..Default::default() }; path_info_service.put(path_info).expect("must succeed"); } fn populate_directory_with_keep( blob_service: Arc, directory_service: Arc, path_info_service: Arc, ) { // upload empty blob let mut bw = blob_service.open_write(); assert_eq!( fixtures::EMPTY_BLOB_DIGEST.to_vec(), bw.close().expect("must succeed closing").to_vec(), ); // upload directory directory_service .put(fixtures::DIRECTORY_WITH_KEEP.clone()) .expect("must succeed uploading"); // upload pathinfo let path_info = PathInfo { node: Some(proto::Node { node: Some(proto::node::Node::Directory(DirectoryNode { name: DIRECTORY_WITH_KEEP_NAME.into(), digest: fixtures::DIRECTORY_WITH_KEEP.digest().into(), size: fixtures::DIRECTORY_WITH_KEEP.size(), })), }), ..Default::default() }; path_info_service.put(path_info).expect("must succeed"); } /// Insert [PathInfo] for DIRECTORY_WITH_KEEP, but don't provide the Directory /// itself. fn populate_pathinfo_without_directory( _: Arc, _: Arc, path_info_service: Arc, ) { // upload pathinfo let path_info = PathInfo { node: Some(proto::Node { node: Some(proto::node::Node::Directory(DirectoryNode { name: DIRECTORY_WITH_KEEP_NAME.into(), digest: fixtures::DIRECTORY_WITH_KEEP.digest().into(), size: fixtures::DIRECTORY_WITH_KEEP.size(), })), }), ..Default::default() }; path_info_service.put(path_info).expect("must succeed"); } /// Insert , but don't provide the blob .keep is pointing to fn populate_blob_a_without_blob( _: Arc, _: Arc, path_info_service: Arc, ) { // Create a PathInfo for blob A let path_info = PathInfo { node: Some(proto::Node { node: Some(proto::node::Node::File(FileNode { name: BLOB_A_NAME.into(), digest: fixtures::BLOB_A_DIGEST.clone().into(), size: fixtures::BLOB_A.len() as u32, executable: false, })), }), ..Default::default() }; path_info_service.put(path_info).expect("must succeed"); } fn populate_directory_complicated( blob_service: Arc, directory_service: Arc, path_info_service: Arc, ) { // upload empty blob let mut bw = blob_service.open_write(); assert_eq!( fixtures::EMPTY_BLOB_DIGEST.to_vec(), bw.close().expect("must succeed closing").to_vec(), ); // upload inner directory directory_service .put(fixtures::DIRECTORY_WITH_KEEP.clone()) .expect("must succeed uploading"); // uplodad parent directory directory_service .put(fixtures::DIRECTORY_COMPLICATED.clone()) .expect("must succeed uploading"); // upload pathinfo let path_info = PathInfo { node: Some(proto::Node { node: Some(proto::node::Node::Directory(DirectoryNode { name: DIRECTORY_COMPLICATED_NAME.into(), digest: fixtures::DIRECTORY_COMPLICATED.digest().into(), size: fixtures::DIRECTORY_COMPLICATED.size(), })), }), ..Default::default() }; path_info_service.put(path_info).expect("must succeed"); } /// Ensure mounting itself doesn't fail #[test] fn mount() { // https://plume.benboeckel.net/~/JustAnotherBlog/skipping-tests-in-rust if !std::path::Path::new("/dev/fuse").exists() { eprintln!("skipping test"); return; } let tmpdir = TempDir::new().unwrap(); let fuser_session = setup_and_mount(tmpdir.path(), |_, _, _| {}).expect("must succeed"); fuser_session.join() } /// Ensure listing the root isn't allowed #[test] fn root() { // https://plume.benboeckel.net/~/JustAnotherBlog/skipping-tests-in-rust if !std::path::Path::new("/dev/fuse").exists() { eprintln!("skipping test"); return; } let tmpdir = TempDir::new().unwrap(); let fuser_session = setup_and_mount(tmpdir.path(), |_, _, _| {}).expect("must succeed"); { // read_dir succeeds, but getting the first element will fail. let mut it = fs::read_dir(tmpdir).expect("must succeed"); let err = it.next().expect("must be some").expect_err("must be err"); assert_eq!(std::io::ErrorKind::PermissionDenied, err.kind()); } fuser_session.join() } /// Ensure we can stat a file at the root #[test] fn stat_file_at_root() { // https://plume.benboeckel.net/~/JustAnotherBlog/skipping-tests-in-rust if !std::path::Path::new("/dev/fuse").exists() { eprintln!("skipping test"); return; } let tmpdir = TempDir::new().unwrap(); let fuser_session = setup_and_mount(tmpdir.path(), populate_blob_a).expect("must succeed"); let p = tmpdir.path().join(BLOB_A_NAME); // peek at the file metadata let metadata = fs::metadata(p).expect("must succeed"); assert!(metadata.is_file()); assert!(metadata.permissions().readonly()); assert_eq!(fixtures::BLOB_A.len() as u64, metadata.len()); fuser_session.join() } /// Ensure we can read a file at the root #[test] fn read_file_at_root() { // https://plume.benboeckel.net/~/JustAnotherBlog/skipping-tests-in-rust if !std::path::Path::new("/dev/fuse").exists() { eprintln!("skipping test"); return; } let tmpdir = TempDir::new().unwrap(); let fuser_session = setup_and_mount(tmpdir.path(), populate_blob_a).expect("must succeed"); let p = tmpdir.path().join(BLOB_A_NAME); // read the file contents let data = fs::read(p).expect("must succeed"); // ensure size and contents match assert_eq!(fixtures::BLOB_A.len(), data.len()); assert_eq!(fixtures::BLOB_A.to_vec(), data); fuser_session.join() } /// Ensure we can read a large file at the root #[test] fn read_large_file_at_root() { // https://plume.benboeckel.net/~/JustAnotherBlog/skipping-tests-in-rust if !std::path::Path::new("/dev/fuse").exists() { eprintln!("skipping test"); return; } let tmpdir = TempDir::new().unwrap(); let fuser_session = setup_and_mount(tmpdir.path(), populate_blob_b).expect("must succeed"); let p = tmpdir.path().join(BLOB_B_NAME); { // peek at the file metadata let metadata = fs::metadata(&p).expect("must succeed"); assert!(metadata.is_file()); assert!(metadata.permissions().readonly()); assert_eq!(fixtures::BLOB_B.len() as u64, metadata.len()); } // read the file contents let data = fs::read(p).expect("must succeed"); // ensure size and contents match assert_eq!(fixtures::BLOB_B.len(), data.len()); assert_eq!(fixtures::BLOB_B.to_vec(), data); fuser_session.join() } /// Read the target of a symlink #[test] fn symlink_readlink() { // https://plume.benboeckel.net/~/JustAnotherBlog/skipping-tests-in-rust if !std::path::Path::new("/dev/fuse").exists() { eprintln!("skipping test"); return; } let tmpdir = TempDir::new().unwrap(); let fuser_session = setup_and_mount(tmpdir.path(), populate_symlink).expect("must succeed"); let p = tmpdir.path().join(SYMLINK_NAME); let target = fs::read_link(&p).expect("must succeed"); assert_eq!(BLOB_A_NAME, target.to_str().unwrap()); // peek at the file metadata, which follows symlinks. // this must fail, as we didn't populate the target. let e = fs::metadata(&p).expect_err("must fail"); assert_eq!(std::io::ErrorKind::NotFound, e.kind()); // peeking at the file metadata without following symlinks will succeed. let metadata = fs::symlink_metadata(&p).expect("must succeed"); assert!(metadata.is_symlink()); // reading from the symlink (which follows) will fail, because the target doesn't exist. let e = fs::read(p).expect_err("must fail"); assert_eq!(std::io::ErrorKind::NotFound, e.kind()); fuser_session.join() } /// Read and stat a regular file through a symlink pointing to it. #[test] fn read_stat_through_symlink() { // https://plume.benboeckel.net/~/JustAnotherBlog/skipping-tests-in-rust if !std::path::Path::new("/dev/fuse").exists() { eprintln!("skipping test"); return; } let tmpdir = TempDir::new().unwrap(); let fuser_session = setup_and_mount(tmpdir.path(), |bs: Arc<_>, ds: Arc<_>, ps: Arc<_>| { populate_blob_a(bs.clone(), ds.clone(), ps.clone()); populate_symlink(bs, ds, ps); }) .expect("must succeed"); let p_symlink = tmpdir.path().join(SYMLINK_NAME); let p_blob = tmpdir.path().join(SYMLINK_NAME); // peek at the file metadata, which follows symlinks. // this must now return the same metadata as when statting at the target directly. let metadata_symlink = fs::metadata(&p_symlink).expect("must succeed"); let metadata_blob = fs::metadata(&p_blob).expect("must succeed"); assert_eq!(metadata_blob.file_type(), metadata_symlink.file_type()); assert_eq!(metadata_blob.len(), metadata_symlink.len()); // reading from the symlink (which follows) will return the same data as if // we were reading from the file directly. assert_eq!( std::fs::read(p_blob).expect("must succeed"), std::fs::read(p_symlink).expect("must succeed"), ); fuser_session.join() } /// Read a directory in the root, and validate some attributes. #[test] fn read_stat_directory() { // https://plume.benboeckel.net/~/JustAnotherBlog/skipping-tests-in-rust if !std::path::Path::new("/dev/fuse").exists() { eprintln!("skipping test"); return; } let tmpdir = TempDir::new().unwrap(); let fuser_session = setup_and_mount(tmpdir.path(), populate_directory_with_keep).expect("must succeed"); let p = tmpdir.path().join(DIRECTORY_WITH_KEEP_NAME); // peek at the metadata of the directory let metadata = fs::metadata(&p).expect("must succeed"); assert!(metadata.is_dir()); assert!(metadata.permissions().readonly()); fuser_session.join() } #[test] /// Read a blob inside a directory. This ensures we successfully populate directory data. fn read_blob_inside_dir() { // https://plume.benboeckel.net/~/JustAnotherBlog/skipping-tests-in-rust if !std::path::Path::new("/dev/fuse").exists() { eprintln!("skipping test"); return; } let tmpdir = TempDir::new().unwrap(); let fuser_session = setup_and_mount(tmpdir.path(), populate_directory_with_keep).expect("must succeed"); let p = tmpdir.path().join(DIRECTORY_WITH_KEEP_NAME).join(".keep"); // peek at metadata. let metadata = fs::metadata(&p).expect("must succeed"); assert!(metadata.is_file()); assert!(metadata.permissions().readonly()); // read from it let data = fs::read(&p).expect("must succeed"); assert_eq!(fixtures::EMPTY_BLOB_CONTENTS.to_vec(), data); fuser_session.join() } #[test] /// Read a blob inside a directory inside a directory. This ensures we properly /// populate directories as we traverse down the structure. fn read_blob_deep_inside_dir() { // https://plume.benboeckel.net/~/JustAnotherBlog/skipping-tests-in-rust if !std::path::Path::new("/dev/fuse").exists() { eprintln!("skipping test"); return; } let tmpdir = TempDir::new().unwrap(); let fuser_session = setup_and_mount(tmpdir.path(), populate_directory_complicated).expect("must succeed"); let p = tmpdir .path() .join(DIRECTORY_COMPLICATED_NAME) .join("keep") .join(".keep"); // peek at metadata. let metadata = fs::metadata(&p).expect("must succeed"); assert!(metadata.is_file()); assert!(metadata.permissions().readonly()); // read from it let data = fs::read(&p).expect("must succeed"); assert_eq!(fixtures::EMPTY_BLOB_CONTENTS.to_vec(), data); fuser_session.join() } /// Ensure readdir works. #[test] fn readdir() { // https://plume.benboeckel.net/~/JustAnotherBlog/skipping-tests-in-rust if !std::path::Path::new("/dev/fuse").exists() { eprintln!("skipping test"); return; } let tmpdir = TempDir::new().unwrap(); let fuser_session = setup_and_mount(tmpdir.path(), populate_directory_complicated).expect("must succeed"); let p = tmpdir.path().join(DIRECTORY_COMPLICATED_NAME); { // read_dir should succeed. Collect all elements let elements: Vec<_> = fs::read_dir(p) .expect("must succeed") .map(|e| e.expect("must not be err")) .collect(); assert_eq!(3, elements.len(), "number of elements should be 3"); // rust skips . and .. // We explicitly look at specific positions here, because we always emit // them ordered. // ".keep", 0 byte file. let e = &elements[0]; assert_eq!(".keep", e.file_name()); assert!(e.file_type().expect("must succeed").is_file()); assert_eq!(0, e.metadata().expect("must succeed").len()); // "aa", symlink. let e = &elements[1]; assert_eq!("aa", e.file_name()); assert!(e.file_type().expect("must succeed").is_symlink()); // "keep", directory let e = &elements[2]; assert_eq!("keep", e.file_name()); assert!(e.file_type().expect("must succeed").is_dir()); } fuser_session.join() } #[test] /// Do a readdir deeper inside a directory, without doing readdir or stat in the parent directory. fn readdir_deep() { // https://plume.benboeckel.net/~/JustAnotherBlog/skipping-tests-in-rust if !std::path::Path::new("/dev/fuse").exists() { eprintln!("skipping test"); return; } let tmpdir = TempDir::new().unwrap(); let fuser_session = setup_and_mount(tmpdir.path(), populate_directory_complicated).expect("must succeed"); let p = tmpdir.path().join(DIRECTORY_COMPLICATED_NAME).join("keep"); { // read_dir should succeed. Collect all elements let elements: Vec<_> = fs::read_dir(p) .expect("must succeed") .map(|e| e.expect("must not be err")) .collect(); assert_eq!(1, elements.len(), "number of elements should be 1"); // rust skips . and .. // ".keep", 0 byte file. let e = &elements[0]; assert_eq!(".keep", e.file_name()); assert!(e.file_type().expect("must succeed").is_file()); assert_eq!(0, e.metadata().expect("must succeed").len()); } fuser_session.join() } /// Check attributes match how they show up in /nix/store normally. #[test] fn check_attributes() { // https://plume.benboeckel.net/~/JustAnotherBlog/skipping-tests-in-rust if !std::path::Path::new("/dev/fuse").exists() { eprintln!("skipping test"); return; } let tmpdir = TempDir::new().unwrap(); let fuser_session = setup_and_mount(tmpdir.path(), |bs: Arc<_>, ds: Arc<_>, ps: Arc<_>| { populate_blob_a(bs.clone(), ds.clone(), ps.clone()); populate_directory_with_keep(bs.clone(), ds.clone(), ps.clone()); populate_symlink(bs, ds, ps); }) .expect("must succeed"); let p_file = tmpdir.path().join(BLOB_A_NAME); let p_directory = tmpdir.path().join(DIRECTORY_WITH_KEEP_NAME); let p_symlink = tmpdir.path().join(SYMLINK_NAME); // peek at metadata. We use symlink_metadata to ensure we don't traverse a symlink by accident. let metadata_file = fs::symlink_metadata(&p_file).expect("must succeed"); let metadata_directory = fs::symlink_metadata(&p_directory).expect("must succeed"); let metadata_symlink = fs::symlink_metadata(&p_symlink).expect("must succeed"); // modes should match. We & with 0o777 to remove any higher bits. assert_eq!(0o444, metadata_file.mode() & 0o777); assert_eq!(0o555, metadata_directory.mode() & 0o777); assert_eq!(0o444, metadata_symlink.mode() & 0o777); // files should have the correct filesize assert_eq!(fixtures::BLOB_A.len() as u64, metadata_file.len()); // directories should have their "size" as filesize assert_eq!( fixtures::DIRECTORY_WITH_KEEP.size() as u64, metadata_directory.size() ); for metadata in &[&metadata_file, &metadata_directory, &metadata_symlink] { // uid and gid should be 0. assert_eq!(0, metadata.uid()); assert_eq!(0, metadata.gid()); // all times should be set to the unix epoch. assert_eq!(0, metadata.atime()); assert_eq!(0, metadata.mtime()); assert_eq!(0, metadata.ctime()); // crtime seems MacOS only } fuser_session.join() } #[test] /// Ensure we allocate the same inodes for the same directory contents. /// $DIRECTORY_COMPLICATED_NAME/keep contains the same data as $DIRECTORY_WITH_KEEP. fn compare_inodes_directories() { // https://plume.benboeckel.net/~/JustAnotherBlog/skipping-tests-in-rust if !std::path::Path::new("/dev/fuse").exists() { eprintln!("skipping test"); return; } let tmpdir = TempDir::new().unwrap(); let fuser_session = setup_and_mount(tmpdir.path(), |bs: Arc<_>, ds: Arc<_>, ps: Arc<_>| { populate_directory_with_keep(bs.clone(), ds.clone(), ps.clone()); populate_directory_complicated(bs, ds, ps); }) .expect("must succeed"); let p_dir_with_keep = tmpdir.path().join(DIRECTORY_WITH_KEEP_NAME); let p_sibling_dir = tmpdir.path().join(DIRECTORY_COMPLICATED_NAME).join("keep"); // peek at metadata. assert_eq!( fs::metadata(&p_dir_with_keep).expect("must succeed").ino(), fs::metadata(&p_sibling_dir).expect("must succeed").ino() ); fuser_session.join() } /// Ensure we allocate the same inodes for the same directory contents. /// $DIRECTORY_COMPLICATED_NAME/keep/,keep contains the same data as $DIRECTORY_COMPLICATED_NAME/.keep #[test] fn compare_inodes_files() { // https://plume.benboeckel.net/~/JustAnotherBlog/skipping-tests-in-rust if !std::path::Path::new("/dev/fuse").exists() { eprintln!("skipping test"); return; } let tmpdir = TempDir::new().unwrap(); let fuser_session = setup_and_mount(tmpdir.path(), populate_directory_complicated).expect("must succeed"); let p_keep1 = tmpdir.path().join(DIRECTORY_COMPLICATED_NAME).join(".keep"); let p_keep2 = tmpdir .path() .join(DIRECTORY_COMPLICATED_NAME) .join("keep") .join(".keep"); // peek at metadata. assert_eq!( fs::metadata(&p_keep1).expect("must succeed").ino(), fs::metadata(&p_keep2).expect("must succeed").ino() ); fuser_session.join() } /// Ensure we allocate the same inode for symlinks pointing to the same targets. /// $DIRECTORY_COMPLICATED_NAME/aa points to the same target as SYMLINK_NAME2. #[test] fn compare_inodes_symlinks() { // https://plume.benboeckel.net/~/JustAnotherBlog/skipping-tests-in-rust if !std::path::Path::new("/dev/fuse").exists() { eprintln!("skipping test"); return; } let tmpdir = TempDir::new().unwrap(); let fuser_session = setup_and_mount(tmpdir.path(), |bs: Arc<_>, ds: Arc<_>, ps: Arc<_>| { populate_directory_complicated(bs.clone(), ds.clone(), ps.clone()); populate_symlink2(bs, ds, ps); }) .expect("must succeed"); let p1 = tmpdir.path().join(DIRECTORY_COMPLICATED_NAME).join("aa"); let p2 = tmpdir.path().join(SYMLINK_NAME2); // peek at metadata. assert_eq!( fs::symlink_metadata(&p1).expect("must succeed").ino(), fs::symlink_metadata(&p2).expect("must succeed").ino() ); fuser_session.join() } /// Check we match paths exactly. #[test] fn read_wrong_paths_in_root() { // https://plume.benboeckel.net/~/JustAnotherBlog/skipping-tests-in-rust if !std::path::Path::new("/dev/fuse").exists() { eprintln!("skipping test"); return; } let tmpdir = TempDir::new().unwrap(); let fuser_session = setup_and_mount(tmpdir.path(), populate_blob_a).expect("must succeed"); // wrong name assert!(!tmpdir .path() .join("00000000000000000000000000000000-tes") .exists()); // invalid hash assert!(!tmpdir .path() .join("0000000000000000000000000000000-test") .exists()); // right name, must exist assert!(tmpdir .path() .join("00000000000000000000000000000000-test") .exists()); // now wrong name with right hash still may not exist assert!(!tmpdir .path() .join("00000000000000000000000000000000-tes") .exists()); fuser_session.join() } /// Make sure writes are not allowed #[test] fn disallow_writes() { // https://plume.benboeckel.net/~/JustAnotherBlog/skipping-tests-in-rust if !std::path::Path::new("/dev/fuse").exists() { eprintln!("skipping test"); return; } let tmpdir = TempDir::new().unwrap(); let fuser_session = setup_and_mount(tmpdir.path(), |_, _, _| {}).expect("must succeed"); let p = tmpdir.path().join(BLOB_A_NAME); let e = std::fs::File::create(&p).expect_err("must fail"); assert_eq!(std::io::ErrorKind::Unsupported, e.kind()); fuser_session.join() } #[test] /// Ensure we get an IO error if the directory service does not have the Directory object. fn missing_directory() { if !std::path::Path::new("/dev/fuse").exists() { eprintln!("skipping test"); return; } let tmpdir = TempDir::new().unwrap(); let fuser_session = setup_and_mount(tmpdir.path(), populate_pathinfo_without_directory).expect("must succeed"); let p = tmpdir.path().join(DIRECTORY_WITH_KEEP_NAME); { // `stat` on the path should succeed, because it doesn't trigger the directory request. fs::metadata(&p).expect("must succeed"); // However, calling either `readdir` or `stat` on a child should fail with an IO error. // It fails when trying to pull the first entry, because we don't implement opendir separately fs::read_dir(&p) .unwrap() .into_iter() .next() .expect("must be some") .expect_err("must be err"); // rust currently sets e.kind() to Uncategorized, which isn't very // helpful, so we don't look at the error more closely than that.. fs::metadata(p.join(".keep")).expect_err("must fail"); } fuser_session.join() } #[test] /// Ensure we get an IO error if the blob service does not have the blob fn missing_blob() { if !std::path::Path::new("/dev/fuse").exists() { eprintln!("skipping test"); return; } let tmpdir = TempDir::new().unwrap(); let fuser_session = setup_and_mount(tmpdir.path(), populate_blob_a_without_blob).expect("must succeed"); let p = tmpdir.path().join(BLOB_A_NAME); { // `stat` on the blob should succeed, because it doesn't trigger a request to the blob service. fs::metadata(&p).expect("must succeed"); // However, calling read on the blob should fail. // rust currently sets e.kind() to Uncategorized, which isn't very // helpful, so we don't look at the error more closely than that.. fs::read(p).expect_err("must fail"); } fuser_session.join() }