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use std::{collections::HashSet, fs};
use flexi_logger::Logger;
use ra_vfs::{Vfs, VfsChange};
use tempfile::tempdir;
fn process_tasks(vfs: &mut Vfs, num_tasks: u32) {
for _ in 0..num_tasks {
let task = vfs.task_receiver().recv().unwrap();
vfs.handle_task(task);
}
}
#[test]
fn test_vfs_works() -> std::io::Result<()> {
Logger::with_str("debug").start().unwrap();
let files = [
("a/foo.rs", "hello"),
("a/bar.rs", "world"),
("a/b/baz.rs", "nested hello"),
];
let dir = tempdir()?;
for (path, text) in files.iter() {
let file_path = dir.path().join(path);
fs::create_dir_all(file_path.parent().unwrap())?;
fs::write(file_path, text)?
}
let a_root = dir.path().join("a");
let b_root = dir.path().join("a/b");
let (mut vfs, _) = Vfs::new(vec![a_root, b_root]);
process_tasks(&mut vfs, 2);
{
let files = vfs
.commit_changes()
.into_iter()
.flat_map(|change| {
let files = match change {
VfsChange::AddRoot { files, .. } => files,
_ => panic!("unexpected change"),
};
files.into_iter().map(|(_id, path, text)| {
let text: String = (&*text).clone();
(format!("{}", path.display()), text)
})
})
.collect::<HashSet<_>>();
let expected_files = [
("foo.rs", "hello"),
("bar.rs", "world"),
("baz.rs", "nested hello"),
]
.iter()
.map(|(path, text)| (path.to_string(), text.to_string()))
.collect::<HashSet<_>>();
assert_eq!(files, expected_files);
}
fs::write(&dir.path().join("a/b/baz.rs"), "quux").unwrap();
process_tasks(&mut vfs, 1);
match vfs.commit_changes().as_slice() {
[VfsChange::ChangeFile { text, .. }] => assert_eq!(text.as_str(), "quux"),
_ => panic!("unexpected changes"),
}
vfs.change_file_overlay(&dir.path().join("a/b/baz.rs"), "m".to_string());
match vfs.commit_changes().as_slice() {
[VfsChange::ChangeFile { text, .. }] => assert_eq!(text.as_str(), "m"),
_ => panic!("unexpected changes"),
}
// removing overlay restores data on disk
vfs.remove_file_overlay(&dir.path().join("a/b/baz.rs"));
match vfs.commit_changes().as_slice() {
[VfsChange::ChangeFile { text, .. }] => assert_eq!(text.as_str(), "quux"),
_ => panic!("unexpected changes"),
}
vfs.add_file_overlay(&dir.path().join("a/b/spam.rs"), "spam".to_string());
match vfs.commit_changes().as_slice() {
[VfsChange::AddFile { text, path, .. }] => {
assert_eq!(text.as_str(), "spam");
assert_eq!(path, "spam.rs");
}
_ => panic!("unexpected changes"),
}
vfs.remove_file_overlay(&dir.path().join("a/b/spam.rs"));
match vfs.commit_changes().as_slice() {
[VfsChange::RemoveFile { path, .. }] => assert_eq!(path, "spam.rs"),
_ => panic!("unexpected changes"),
}
fs::write(&dir.path().join("a/new.rs"), "new hello").unwrap();
process_tasks(&mut vfs, 1);
match vfs.commit_changes().as_slice() {
[VfsChange::AddFile { text, path, .. }] => {
assert_eq!(text.as_str(), "new hello");
assert_eq!(path, "new.rs");
}
_ => panic!("unexpected changes"),
}
fs::rename(&dir.path().join("a/new.rs"), &dir.path().join("a/new1.rs")).unwrap();
process_tasks(&mut vfs, 2);
match vfs.commit_changes().as_slice() {
[VfsChange::RemoveFile {
path: removed_path, ..
}, VfsChange::AddFile {
text,
path: added_path,
..
}] => {
assert_eq!(removed_path, "new.rs");
assert_eq!(added_path, "new1.rs");
assert_eq!(text.as_str(), "new hello");
}
xs => panic!("unexpected changes {:?}", xs),
}
fs::remove_file(&dir.path().join("a/new1.rs")).unwrap();
process_tasks(&mut vfs, 1);
match vfs.commit_changes().as_slice() {
[VfsChange::RemoveFile { path, .. }] => assert_eq!(path, "new1.rs"),
_ => panic!("unexpected changes"),
}
match vfs.task_receiver().try_recv() {
Err(crossbeam_channel::TryRecvError::Empty) => (),
res => panic!("unexpected {:?}", res),
}
vfs.shutdown().unwrap();
Ok(())
}
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