Added `muted` context manager for temproary switching signal off (#84)

This is useful whilst testing to remove a signal's affects.

Co-authored-by: Michael Elovskikh <wronglink@yandex-team.ru>

1 files changed, 17 insertions, 0 deletions

diff --git a/tests/test_signals.py b/tests/test_signals.py
index 0879b5c..e79ff7f 100644
--- a/tests/test_signals.py
+++ b/tests/test_signals.py
@@ -512,6 +512,23 @@ def test_named_blinker():
     assert "squiznart" in repr(sig)
 
 
+def test_mute_signal():
+    sentinel = []
+
+    def received(sender):
+        sentinel.append(sender)
+
+    sig = blinker.Signal()
+    sig.connect(received)
+
+    sig.send(123)
+    assert 123 in sentinel
+
+    with sig.muted():
+        sig.send(456)
+    assert 456 not in sentinel
+
+
 def values_are_empty_sets_(dictionary):
     for val in dictionary.values():
         assert val == set()