Some logging internals rely on the boolean value of a Handler

They should use identity comparison with None, but they do not...

testfixtures/logcapture.py

@@ -100,6 +100,10 @@ def atexit(cls):
                 '%s' % ('\n'.join((str(i.names) for i in cls.instances)))
                 )
 
+    def __bool__(self) -> bool:
+        # Some logging internals check boolean rather than identity for handlers :-(r
+        return True
+
     def __len__(self):
         return len(self.records)
 

testfixtures/tests/test_logcapture.py

@@ -367,6 +367,10 @@ def test_len_and_getitem(self):
         compare(len(log), expected=1)
         compare(log[0], expected=('foo', 'INFO', 'a log message'))
 
+    def test_truthiness_when_empty(self):
+        handler = LogCapture(install=False)
+        assert handler
+        assert bool(handler)
 class TestCheckPresent:
 
     def test_order_matters_ok(self):