1 files changed, 46 insertions, 3 deletions
diff --git a/prolog/problems/trees/mirrorbt_2/common.py b/prolog/problems/trees/mirrorbt_2/common.py
index 1ee0a9c..ed9162c 100644
--- a/prolog/problems/trees/mirrorbt_2/common.py
+++ b/prolog/problems/trees/mirrorbt_2/common.py
@@ -1,8 +1,13 @@
-# coding=utf-8
+from operator import itemgetter
+import socket
+
+import prolog.engine
+import prolog.util
+from server.hints import Hint, HintPopup
 
 id = 136
-number = 43
-visible = False
+number = 20
+visible = True
 facts = None
 
 solution = '''\
@@ -11,3 +16,41 @@ mirrorBT(b(L, X, R), b(NewR, X, NewL)) :-
   mirrorBT(L, NewL),
   mirrorBT(R, NewR).
 '''
+
+test_cases = [
+    ('mirrorBT(nil, X)',
+        [{'X': 'nil'}]),
+    ('mirrorBT(b(nil,q,nil), X), X == b(nil,q,nil)',
+        [{}]),
+    ('mirrorBT(b(b(nil,a,nil),d,b(nil,c,nil)), X), X == b(b(nil,c,nil),d,b(nil,a,nil))',
+        [{}]),
+    ('''mirrorBT(b(b(nil,2,nil),1,b(nil,3,b(nil,4,nil))),X),
+            X == b(b(b(nil,4,nil),3,nil),1,b(nil,2,nil))''',
+        [{}]),
+    ('''mirrorBT(b(b(b(nil,4,nil),2,b(nil,6,nil)),1,b(nil,3,b(nil,5,nil))),X),
+            X == b(b(b(nil,5,nil),3,nil),1,b(b(nil,6,nil),2,b(nil,4,nil)))''',
+        [{}]),
+]
+
+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
+
+def hint(code, aux_code):
+    # TODO
+    return []