Add extra debug to memory-monitor-dbus test

Hopefully this will give us the necessary information to find out why
this test isn't reliable.

Bug-Debian: https://bugs.debian.org/995178
Forwarded: no

gio/tests/memory-monitor-dbus.py.in

@@ -74,18 +74,29 @@ try:
             Timeout is in deciseconds, defaulting to 50 (5 seconds). message is
             printed on failure.
             '''
+            print('Waiting up to {}/10 seconds for {!r} to be true'.format(timeout, condition))
+            orig_timeout = timeout
+
             while timeout >= 0:
+                print('Loop iteration')
                 context = GLib.MainContext.default()
                 while context.iteration(False):
+                    print('Iterating main loop')
                     pass
                 if condition():
+                    print('Condition reached')
                     break
                 timeout -= 1
                 time.sleep(0.1)
             else:
+                print('Condition not reached in {}/10 seconds'.format(orig_timeout))
                 self.fail(message or 'timed out waiting for ' + str(condition))
 
         def memory_warning_cb(self, monitor, level):
+            print('low-memory-warning: monitor {!r} reports level {}'.format(
+                monitor,
+                level,
+            ))
             self.last_warning = level
             self.main_context.wakeup()
 
@@ -95,17 +106,20 @@ try:
             # Wait 2 seconds
             timeout = 2
             while timeout > 0:
+                print('Waiting 0.5s for stray events...')
                 time.sleep(0.5)
                 timeout -= 0.5
                 self.main_context.iteration(False)
 
+            print('Emitting mock low-memory warning, level 100: try to free memory')
             self.dbusmock.EmitWarning(100)
             # Wait 2 seconds or until warning
-            self.assertEventually(lambda: self.last_warning == 100, "'100' low-memory warning not received", 20)
+            self.assertEventually(lambda: self.last_warning == 100, "'100' low-memory warning not received", 100)
 
+            print('Emitting mock low-memory warning, level 255: OOM imminent')
             self.dbusmock.EmitWarning(255)
             # Wait 2 seconds or until warning
-            self.assertEventually(lambda: self.last_warning == 255, "'255' low-memory warning not received", 20)
+            self.assertEventually(lambda: self.last_warning == 255, "'255' low-memory warning not received", 100)
 
 except ImportError as e:
     @unittest.skip("Cannot import %s" % e.name)