From a49a96bb5d683bb2a721da70c4c3f049cf6ba2f3 Mon Sep 17 00:00:00 2001
From: Damien George <damien.p.george@gmail.com>
Date: Tue, 14 Mar 2017 22:08:37 +1100
Subject: [PATCH] tests/extmod/vfs_basic: Unmount all existing devices before
 doing test.

This is so the test can run successfully on targets that already have
something mounted.
---
 tests/extmod/vfs_basic.py | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/tests/extmod/vfs_basic.py b/tests/extmod/vfs_basic.py
index c8f4eaee92..83c83fd227 100644
--- a/tests/extmod/vfs_basic.py
+++ b/tests/extmod/vfs_basic.py
@@ -46,6 +46,10 @@ class Filesystem:
         print(self.id, 'open', file, mode)
 
 
+# first we umount any existing mount points the target may have
+for path in uos.listdir('/'):
+    uos.umount('/' + path)
+
 # stat root dir
 print(uos.stat('/'))