1 files changed, 32 insertions, 0 deletions
diff --git a/prolog/problems/family_relations/sister_2/common.py b/prolog/problems/family_relations/sister_2/common.py
index 084aca6..2c9528e 100644
--- a/prolog/problems/family_relations/sister_2/common.py
+++ b/prolog/problems/family_relations/sister_2/common.py
@@ -13,3 +13,35 @@ sister(X, Y) :-
   female(X),
   X \== Y.
 '''
+
+import prolog.engine
+import server.problems
+
+def test(program):
+    # Test queries and expected answers (values of X).
+    queries = [
+        ('sister(melanie, X)', set(['andrew'])),
+        ('sister(X, andrew)', set(['melanie'])),
+        ('sister(X, _)', set(['michelle', 'daniela', 'patricia', 'luana', 'sally', 'melanie', 'nevia', 'vanessa', 'anna'])),
+    ]
+
+    code = program + '\n' + server.problems.load_facts('prolog', facts).facts
+
+    engine_id = None
+    try:
+        engine_id, output = prolog.engine.create(code=code, timeout=1.0)
+        if not engine_id:
+            return 0, len(queries)
+
+        n_correct = 0
+        for query, solution in queries:
+            answers, error = prolog.engine.ask_all(engine_id, query=query, timeout=1.0)
+            if answers and answers[-1] != 'timed out':
+                values_x = set([ans.get('X') for ans, constraints in answers])
+                if values_x == solution:
+                    n_correct += 1
+    finally:
+        if engine_id:
+            prolog.engine.destroy(engine_id)
+
+    return n_correct, len(queries)