Soloing

tests/test_solo_enclosures.py

@@ -24,6 +24,18 @@ def fixture(symbol='C7',target=None,scale=None):
 
 
 class EnclosureContracts(unittest.TestCase):
+  def test_existing_upper_can_continue_without_a_new_attack(self):
+    h,notes,c=fixture('Dm',note(4,8,'d'))
+    upper=dataclasses.replace(notes[0],start=F(5,2))
+    contract=dataclasses.replace(c,upper=upper,approach_start=F(3))
+    self.assertTrue(h.evaluate((upper,*notes[1:]),enclosures=(contract,)).valid)
+    # Joining a tie must not hide an exposed long non-chord upper neighbor.
+    long_upper=dataclasses.replace(upper,start=F(1))
+    invalid=dataclasses.replace(contract,upper=long_upper)
+    self.assertFalse(h.evaluate((long_upper,*notes[1:]),enclosures=(invalid,)).valid)
+    split=(dataclasses.replace(upper,end=F(3)),dataclasses.replace(upper,start=F(3),continuation=True,event_id='tie'),*notes[1:])
+    self.assertEqual(h.evaluate(split,enclosures=(contract,)),h.evaluate((upper,*notes[1:]),enclosures=(contract,)))
+
   def test_worked_examples_and_actual_collection_membership(self):
     hm=tests.scale_fixtures.library().scale('harmonic_minor',1,'D')
     for symbol,target,scale,expected in (