[gnome-settings-daemon/benzea/ci-fixes] tests: Correctly handle EOF in OutputChecker

[Benjamin Berg <bberg src gnome org>]

commit da2046ae788712857edd83b45871bcf7ac215b71
Author: Benjamin Berg <bberg redhat com>
Date:   Tue Jul 20 13:42:49 2021 +0200

    tests: Correctly handle EOF in OutputChecker

 tests/output_checker.py | 14 ++++++++++++++
 1 file changed, 14 insertions(+)
---
diff --git a/tests/output_checker.py b/tests/output_checker.py
index 453d2698..c5ae2619 100644
--- a/tests/output_checker.py
+++ b/tests/output_checker.py
@@ -58,6 +58,9 @@ class OutputChecker(object):
 
                 r = os.read(self._pipe_fd_r, 1024)
                 if not r:
+                    os.close(self._pipe_fd_r)
+                    self._pipe_fd_r = -1
+                    self._lines_sem.release()
                     return
             except OSError as e:
                 if e.errno == errno.EWOULDBLOCK:
@@ -88,6 +91,13 @@ class OutputChecker(object):
             try:
                 l = self._lines.pop(0)
             except IndexError:
+                # EOF, throw error
+                if self._pipe_fd_r == -1:
+                    if failmsg:
+                        raise AssertionError("No further messages: " % failmsg)
+                    else:
+                        raise AssertionError('No client waiting for needle %s' % (str(needle_re)))
+
                 # Check if should wake up
                 if not self._lines_sem.acquire(timeout = deadline - time.time()):
                     if failmsg:
@@ -121,6 +131,10 @@ class OutputChecker(object):
             try:
                 l = self._lines.pop(0)
             except IndexError:
+                # EOF, so everything good
+                if self._pipe_fd_r == -1:
+                    break
+
                 # Check if should wake up
                 if not self._lines_sem.acquire(timeout = deadline - time.time()):
                     # Timed out, so everything is good