tests/extmod/vfs_posix.py: Only test statvfs if it exists.

Signed-off-by: Damien George <damien@micropython.org>

tests/extmod/vfs_posix.py

@@ -59,9 +59,10 @@ print(uos.listdir(temp_dir))
 vfs = uos.VfsPosix(temp_dir)
 print(list(i[0] for i in vfs.ilistdir(".")))
 
-# stat, statvfs
+# stat, statvfs (statvfs may not exist)
 print(type(vfs.stat(".")))
-print(type(vfs.statvfs(".")))
+if hasattr(vfs, "statvfs"):
+    assert type(vfs.statvfs(".")) is tuple
 
 # check types of ilistdir with str/bytes arguments
 print(type(list(vfs.ilistdir("."))[0][0]))

tests/extmod/vfs_posix.py.exp

@@ -7,7 +7,6 @@ hello
 ['test2']
 ['test2']
 <class 'tuple'>
-<class 'tuple'>
 <class 'str'>
 <class 'bytes'>
 []