From 07a4b9f1a0c36c6bff4b0dbaaeaa93baea8b1f0e Mon Sep 17 00:00:00 2001
From: Aleksey Kladov <aleksey.kladov@gmail.com>
Date: Sat, 26 Jan 2019 15:41:52 +0300
Subject: dont overwrite memfies

---
 crates/ra_vfs/tests/vfs.rs | 12 ++++++++++++
 1 file changed, 12 insertions(+)

(limited to 'crates/ra_vfs/tests/vfs.rs')

diff --git a/crates/ra_vfs/tests/vfs.rs b/crates/ra_vfs/tests/vfs.rs
index 357e1c775..545e1dbdd 100644
--- a/crates/ra_vfs/tests/vfs.rs
+++ b/crates/ra_vfs/tests/vfs.rs
@@ -165,6 +165,18 @@ fn test_vfs_works() -> std::io::Result<()> {
         assert_eq!(path, "sub1/sub2/new1.rs")
     );
 
+    {
+        vfs.add_file_overlay(&dir.path().join("a/memfile.rs"), "memfile".to_string());
+        assert_match!(
+            vfs.commit_changes().as_slice(),
+            [VfsChange::AddFile { text, .. }],
+            assert_eq!(text.as_str(), "memfile")
+        );
+        fs::write(&dir.path().join("a/memfile.rs"), "ignore me").unwrap();
+        process_tasks(&mut vfs, 1);
+        assert_match!(vfs.commit_changes().as_slice(), []);
+    }
+
     // should be ignored
     fs::create_dir_all(dir.path().join("a/target")).unwrap();
     fs::write(&dir.path().join("a/target/new.rs"), "ignore me").unwrap();
-- 
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