[glib] tests: Improve error handling for fileutils test

[Philip Withnall <pwithnall src gnome org>]

commit b7ffc07d9893949b218d4057d896e7ba943c1b8b
Author: Philip Withnall <withnall endlessm com>
Date:   Mon May 8 11:19:46 2017 +0100

    tests: Improve error handling for fileutils test
    
    The test_stdio_wrappers() test will spuriously fail if the mkdir-test
    directory already exists and is non-empty, which can happen if a
    previous test run has failed and left a coredump file in the directory.
    Tighten up the error checking around the pre-test rmdir() call to catch
    this failure.
    
    Signed-off-by: Philip Withnall <withnall endlessm com>
    
    https://bugzilla.gnome.org/show_bug.cgi?id=782237

 glib/tests/fileutils.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/glib/tests/fileutils.c b/glib/tests/fileutils.c
index 10ef136..4c987a3 100644
--- a/glib/tests/fileutils.c
+++ b/glib/tests/fileutils.c
@@ -848,7 +848,8 @@ test_stdio_wrappers (void)
   GError *error = NULL;
 
   g_remove ("mkdir-test/test-create");
-  g_rmdir ("mkdir-test");
+  ret = g_rmdir ("mkdir-test");
+  g_assert (ret == 0 || errno == ENOENT);
 
   ret = g_stat ("mkdir-test", &buf);
   g_assert_cmpint (ret, ==, -1);