[gnome-settings-daemon/benzea/tests-output-checker] fixup! tests: Add new OutputChecker class

[Benjamin Berg <bberg src gnome org>]

commit b16c355c004c9b749d237c9d415575ffcf467909
Author: Benjamin Berg <bberg redhat com>
Date:   Mon Feb 15 12:59:00 2021 +0100

    fixup! tests: Add new OutputChecker class

 tests/output_checker.py | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)
---
diff --git a/tests/output_checker.py b/tests/output_checker.py
index 4bf93d82..334be83d 100644
--- a/tests/output_checker.py
+++ b/tests/output_checker.py
@@ -46,8 +46,12 @@ class OutputChecker(object):
 
     def _copy(self):
         while True:
-            r = os.read(self._pipe_fd_r, 1024)
-            if not r:
+            try:
+                r = os.read(self._pipe_fd_r, 1024)
+                if not r:
+                    return
+            except OSError:
+                # We get a bad file descriptor error when the outside closes the FD
                 return
 
             l = r.split(b'\n')