Add explanatory comments to filesys tests.

[pintos-anon] / src / tests / filesys / extended / dir-open.c

diff --git a/src/tests/filesys/extended/dir-open.c b/src/tests/filesys/extended/dir-open.c
index 9bfe2e02a0efa8323fd02ba42dd7ac824e72147b..c1f6da5f6a1cb0a1ca010b7f47054812bf9d441c 100644 (file)
--- a/src/tests/filesys/extended/dir-open.c
+++ b/src/tests/filesys/extended/dir-open.c
@@ -1,3 +1,7 @@
+/* Tries to open a directory.
+   This is allowed to succeed or fail,
+   but if it succeeds then attempts to write to it must fail. */
+
 #include <syscall.h>
 #include "tests/lib.h"
 #include "tests/main.h"