1 files changed, 36 insertions, 0 deletions
diff --git a/prolog/problems/dcg/digit_2/common.py b/prolog/problems/dcg/digit_2/common.py
index 5b4fcec..4a0d825 100644
--- a/prolog/problems/dcg/digit_2/common.py
+++ b/prolog/problems/dcg/digit_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 = 164
 number = 30
 visible = True
@@ -6,3 +13,32 @@ facts = None
 solution = '''\
 digit --> ([0] ; [1] ; [2] ; [3] ; [4] ; [5] ; [6] ; [7] ; [8] ; [9]).
 '''
+
+test_cases = [
+    ('digit([2], [])',
+        [{}]),
+    ('digit([5], [])',
+        [{}]),
+    ('setof(W, digit(W, []), Words), Words == [[0],[1],[2],[3],[4],[5],[6],[7],[8],[9]]',
+        [{}]),
+]
+
+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
+