[core] Testing and fixing new args/kwargs behaviour.

tests/structs/test_bags.py

@@ -92,13 +92,28 @@ def test_pickle():
         assert unpickled == bag
 
 
-def test_eq_operator():
+def test_eq_operator_bag():
     assert Bag('foo') == Bag('foo')
     assert Bag('foo') != Bag('bar')
     assert Bag('foo') is not Bag('foo')
     assert Bag('foo') != Token('foo')
     assert Token('foo') != Bag('foo')
 
+def test_eq_operator_tuple_mixed():
+    assert Bag('foo', bar='baz') == ('foo', {'bar': 'baz'})
+    assert Bag('foo') == ('foo', {})
+    assert Bag() == ({}, )
+
+def test_eq_operator_tuple_not_mixed():
+    assert Bag('foo', 'bar') == ('foo', 'bar')
+    assert Bag('foo') == ('foo', )
+    assert Bag() == ()
+
+def test_eq_operator_dict():
+    assert Bag(foo='bar') == {'foo': 'bar'}
+    assert Bag(foo='bar', corp='acme') == {'foo': 'bar', 'corp': 'acme', }
+    assert Bag(foo='bar', corp='acme') == {'corp': 'acme', 'foo': 'bar', }
+    assert Bag() == {}
 
 def test_repr():
     bag = Bag('a', a=1)