raise-error-when-directive-declaration-is-missing

Author: DamianCzajkowski

ariadne/schema_visitor.py

@@ -468,6 +468,15 @@ def _add_directive(decl):
 
         each(schema.directives, _add_directive)
 
+        missing_directives = [
+            name for name in directive_visitors if name not in declared_directives
+        ]
+
+        if missing_directives:
+            raise ValueError(
+                f"Missing directive declarations for: {', '.join(missing_directives)}"
+            )
+
         #  If the visitor subclass overrides get_directive_declaration, and it
         #  returns a non-null GraphQLDirective, use that instead of any directive
         #  declared in the schema itself. Reasoning: if a SchemaDirectiveVisitor

tests/test_directives.py

@@ -178,6 +178,21 @@ def test_directive_raises_type_error_if_required_argument_is_not_given():
         make_executable_schema(type_defs, directives={"test": ReturnValueDirective})
 
 
+def test_directive_raises_type_error_if_there_is_typo():
+    type_defs = """
+        directive @test on FIELD_DEFINITION
+
+        type Query {
+            hello: String! @test,
+        }
+    """
+
+    with pytest.raises(ValueError):
+        make_executable_schema(
+            type_defs, directives={"test_typo": ReturnValueDirective}
+        )
+
+
 def test_can_implement_unique_id_directive():
     type_defs = """
         directive @uniqueID(name: String, from: [String]) on OBJECT