Updated sheerka.value() and added unit tests

core/builtin_concepts.py

@@ -45,7 +45,6 @@ class BuiltinConcepts(Enum):
     ENUMERATION = "enum"  # represents a list or a set
     LIST = "list"  # represents a list
     CANNOT_RESOLVE_VALUE_ERROR = "value cannot be resolved"  # don't know how to find concept value
-    CONCEPT_NOT_INITIALIZED = "concept not evaluated"  # Try to work on a concept that is not evaluated
 
     NODE = "node"
     GENERIC_NODE = "generic node"
@@ -69,7 +68,6 @@ BuiltinErrors = [str(e) for e in {
     BuiltinConcepts.CONCEPT_ALREADY_DEFINED,
     BuiltinConcepts.CONCEPT_EVAL_ERROR,
     BuiltinConcepts.CANNOT_RESOLVE_VALUE_ERROR,
-    BuiltinConcepts.CONCEPT_NOT_INITIALIZED
 }]
 
 """
@@ -293,27 +291,6 @@ class ConceptEvalError(Concept):
         return self.props["property_name"].value
 
 
-class ConceptNotInitialized(Concept):
-    def __init__(self, error=None, concept=None, property_name=None):
-        super().__init__(BuiltinConcepts.CONCEPT_NOT_INITIALIZED,
-                         True,
-                         False,
-                         BuiltinConcepts.CONCEPT_NOT_INITIALIZED,
-                         error)
-        self.set_prop("concept", concept)
-
-    def __repr__(self):
-        return f"ConceptNotInitialized(error={self.error}, concept={self.concept})"
-
-    @property
-    def error(self):
-        return self.body
-
-    @property
-    def concept(self):
-        return self.props["concept"].value
-
-
 class EnumerationConcept(Concept):
     def __init__(self, iteration=None):
         super().__init__(BuiltinConcepts.ENUMERATION, True, False, BuiltinConcepts.ENUMERATION, iteration)

core/sheerka.py

@@ -546,7 +546,7 @@ class Sheerka(Concept):
             return from_db
 
         # else return new Unknown concept
-        # Note that I don't call the new() method, as it use get() -> cyclic call
+        # Note that I don't call the new() method to prevent cyclic call
         unknown_concept = Concept()
         template = self.concepts_cache[str(BuiltinConcepts.UNKNOWN_CONCEPT)]
         unknown_concept.update_from(template)
@@ -623,7 +623,7 @@ class Sheerka(Concept):
         if self.isinstance(obj, BuiltinConcepts.RETURN_VALUE) and \
             obj.status and \
             self.isinstance(obj.value, BuiltinConcepts.USER_INPUT):
-            return obj.value.text
+            return obj.value.body
 
         if not isinstance(obj, Concept):
             return obj
@@ -632,7 +632,10 @@ class Sheerka(Concept):
             return obj.get_value()
 
         if obj.body is not None:
-            return obj.body
+            if (isinstance(obj.body, list) or isinstance(obj.body, set)) and len(obj.body) == 1:
+                return obj.body[0]
+            else:
+                return obj.body
 
         return obj if allow_none_body else self.new(BuiltinConcepts.CANNOT_RESOLVE_VALUE_ERROR, body=obj)