Seek not required in Directory's write anymore (#584)

2 files changed, 3 insertions, 25 deletions

diff --git a/src/directory/mod.rs b/src/directory/mod.rs
index dd94ccf..1b6f633 100644
--- a/src/directory/mod.rs
+++ b/src/directory/mod.rs
@@ -24,22 +24,18 @@ pub use self::ram_directory::RAMDirectory;
 pub use self::read_only_source::ReadOnlySource;
 pub(crate) use self::watch_event_router::WatchCallbackList;
 pub use self::watch_event_router::{WatchCallback, WatchHandle};
-use std::io::{BufWriter, Seek, Write};
+use std::io::{BufWriter, Write};
 
 #[cfg(feature = "mmap")]
 pub use self::mmap_directory::MmapDirectory;
 
 pub(crate) use self::managed_directory::ManagedDirectory;
 
-/// Synonym of Seek + Write
-pub trait SeekableWrite: Seek + Write {}
-impl<T: Seek + Write> SeekableWrite for T {}
-
 /// Write object for Directory.
 ///
 /// `WritePtr` are required to implement both Write
 /// and Seek.
-pub type WritePtr = BufWriter<Box<dyn SeekableWrite>>;
+pub type WritePtr = BufWriter<Box<dyn Write>>;
 
 #[cfg(test)]
 mod tests;
diff --git a/src/directory/tests.rs b/src/directory/tests.rs
index d935fa3..f27dc91 100644
--- a/src/directory/tests.rs
+++ b/src/directory/tests.rs
@@ -1,5 +1,5 @@
 use super::*;
-use std::io::{Seek, SeekFrom, Write};
+use std::io::Write;
 use std::mem;
 use std::path::{Path, PathBuf};
 use std::sync::atomic::AtomicUsize;
@@ -52,23 +52,6 @@ fn test_simple(directory: &mut dyn Directory) {
     assert!(!directory.exists(*TEST_PATH));
 }
 
-fn test_seek(directory: &mut dyn Directory) {
-    {
-        {
-            let mut write_file = directory.open_write(*TEST_PATH).unwrap();
-            write_file.write_all(&[4, 3, 7, 3, 5]).unwrap();
-            write_file.seek(SeekFrom::Start(0)).unwrap();
-            write_file.write_all(&[3, 1]).unwrap();
-            write_file.flush().unwrap();
-        }
-        let read_file = directory.open_read(*TEST_PATH).unwrap();
-        let data: &[u8] = &*read_file;
-        assert_eq!(data, &[3u8, 1u8, 7u8, 3u8, 5u8]);
-    }
-
-    assert!(directory.delete(*TEST_PATH).is_ok());
-}
-
 fn test_rewrite_forbidden(directory: &mut dyn Directory) {
     {
         directory.open_write(*TEST_PATH).unwrap();
@@ -120,7 +103,6 @@ fn test_directory_delete(directory: &mut dyn Directory) {
 
 fn test_directory(directory: &mut dyn Directory) {
     test_simple(directory);
-    test_seek(directory);
     test_rewrite_forbidden(directory);
     test_write_create_the_file(directory);
     test_directory_delete(directory);