1 files changed, 40 insertions, 0 deletions
diff --git a/prolog/problems/dcg/ab_2/common.py b/prolog/problems/dcg/ab_2/common.py
index 4c20a86..7646b95 100644
--- a/prolog/problems/dcg/ab_2/common.py
+++ b/prolog/problems/dcg/ab_2/common.py
@@ -1,3 +1,10 @@
+from operator import itemgetter
+import socket
+
+import prolog.engine
+import prolog.util
+from server.hints import Hint, HintPopup
+
 id = 162
 number = 10
 visible = True
@@ -8,3 +15,36 @@ ab --> [a], ab.
 ab --> t162.
 t162 --> [b], t162.
 t162 --> [].'''
+
+test_cases = [
+    ('ab([], [])',
+        [{}]),
+    ('setof(W, [A]^(W = [A], ab(W, [])), Words), Words == [[a],[b]]',
+        [{}]),
+    ('setof(W, [A,B]^(W = [A,B], ab(W, [])), Words), Words == [[a,a],[a,b],[b,b]]',
+        [{}]),
+    ('setof(W, [A,B,C]^(W = [A,B,C], ab(W, [])), Words), Words == [[a,a,a],[a,a,b],[a,b,b],[b,b,b]]',
+        [{}]),
+    ('setof(W, [A,B,C,D]^(W = [A,B,C,D], ab(W, [])), Words), Words == [[a,a,a,a],[a,a,a,b],[a,a,b,b],[a,b,b,b],[b,b,b,b]]',
+        [{}]),
+]
+
+def test(code, aux_code):
+    n_correct = 0
+    engine_id = None
+    try:
+        engine_id, output = prolog.engine.create(code=code+aux_code, timeout=1.0)
+        if engine_id is not None and 'error' not in map(itemgetter(0), output):
+            # Engine successfully created, and no syntax error in program.
+            for query, answers in test_cases:
+                if prolog.engine.check_answers(engine_id, query=query, answers=answers, timeout=1.0):
+                    n_correct += 1
+    except socket.timeout:
+        pass
+    finally:
+        if engine_id:
+            prolog.engine.destroy(engine_id)
+
+    hints = [{'id': 'test_results', 'args': {'passed': n_correct, 'total': len(test_cases)}}]
+    return n_correct, len(test_cases), hints
+