Fixed initialisation issue for concepts with BNF definition

tests/test_ConceptLexerParser.py

@@ -485,6 +485,27 @@ def test_i_can_detect_duplicates_when_reference():
     assert res[1].value.body == [(foo, 0, 0, "twenty")]
 
 
+def test_i_can_parse_concept_reference_that_is_not_in_grammar():
+    context = get_context()
+    one = Concept(name="one")
+    two = Concept(name="two")
+    foo = Concept(name="foo")
+    context.sheerka.add_in_cache(one)
+    context.sheerka.add_in_cache(two)
+
+    concepts = {foo: Sequence("twenty", OrderedChoice(one, two))}
+    parser = ConceptLexerParser()
+    parser.initialize(context, concepts)
+
+    res = parser.parse(context, "twenty two")
+    assert res.status
+    assert res.value.body == [(foo, 0, 2, "twenty two")]
+
+    res = parser.parse(context, "twenty one")
+    assert res.status
+    assert res.value.body == [(foo, 0, 2, "twenty one")]
+
+
 def test_i_can_parse_zero_or_more():
     context = get_context()
     foo = Concept(name="foo")
@@ -741,6 +762,7 @@ def test_infinite_recursion_does_not_fail_if_a_concept_is_missing():
 
     assert foo in parser.concepts_grammars
 
+
 def test_i_can_detect_indirect_infinite_recursion_with_optional():
     # TODO infinite recursion with optional
     pass