Fix bugs with empty and predicate-only matches

Also clarified the behaviour of empty matches, which match anything,
but only once. This behaviour is required for consistency with the
rest of the matching rules.

1 files changed, 1 insertions, 1 deletions

diff --git a/testing/test_abdl.py b/testing/test_abdl.py
index 65549ed..cbdcd9d 100644
--- a/testing/test_abdl.py
+++ b/testing/test_abdl.py
@@ -281,7 +281,7 @@ def test_multi_key_predicate(foo, pat):
 @hypothesis.given(objtree, st.just(abdl.compile("")))
 def test_empty(foo, pat):
     def deep(foo):
-        yield from ()
+        yield {}
     assert all(LogAndCompare(pat.match(foo), deep(foo)))
 
 # FIXME