+ test_yaffs_close //This function has already been called by the time this test is reached.
+
+ test_yaffs_stat_EBADF
+ test_yaffs_stat_ELOOP
+ test_yaffs_stat_EACCES
+ test_yaffs_stat_ENAMETOOLONG
+ test_yaffs_stat_ENOTDIR
+
+ test_yaffs_read_EISDIR //Cannot be generated with yaffs.
+ test_yaffs_read_EFBIG
+ test what happens if you read off the end of the file?
+
+ test_yaffs_write_EFBIG
+ test_yaffs_write_EINVAL
+ What happens when you run out of space?