1 files changed, 45 insertions, 0 deletions
diff --git a/prolog/problems/license_plates/genexp_2/common.py b/prolog/problems/license_plates/genexp_2/common.py
index ecdc772..4b097f2 100644
--- a/prolog/problems/license_plates/genexp_2/common.py
+++ b/prolog/problems/license_plates/genexp_2/common.py
@@ -1,5 +1,9 @@
 # coding=utf-8
 
+from operator import itemgetter
+import prolog.engine
+import server.problems
+
 id = 146
 number = 53
 visible = True
@@ -22,3 +26,44 @@ genexp(L, Exp) :-
   conc146(Before, [NExp|After], L1),
   genexp(L1, Exp).
 '''
+
+test_cases = [
+    ('genexp([1], X)',
+        [{'X': '1'}]),
+    ('genexp([1, 2], X)',
+        [{'X': '1*2'}, {'X': '1+2'}, {'X': '1-2'}, {'X': '1/2'}]),
+    ('genexp([1, 2, 3], X)',
+        [{'X': '1+2+3'}, {'X': '1+2-3'}, {'X': '(1+2)*3'}, {'X': '(1+2)/3'},
+         {'X': '1-2+3'}, {'X': '1-2-3'}, {'X': '(1-2)*3'}, {'X': '(1-2)/3'},
+         {'X': '1*2+3'}, {'X': '1*2-3'}, {'X': '1*2*3'}, {'X': '1*2/3'},
+         {'X': '1/2+3'}, {'X': '1/2-3'}, {'X': '1/2*3'}, {'X': '1/2/3'},
+         {'X': '1+(2+3)'}, {'X': '1-(2+3)'}, {'X': '1*(2+3)'}, {'X': '1/(2+3)'},
+         {'X': '1+(2-3)'}, {'X': '1-(2-3)'}, {'X': '1*(2-3)'}, {'X': '1/(2-3)'},
+         {'X': '1+2*3'}, {'X': '1-2*3'}, {'X': '1*(2*3)'}, {'X': '1/(2*3)'},
+         {'X': '1+2/3'}, {'X': '1-2/3'}, {'X': '1*(2/3)'}, {'X': '1/(2/3)'}]),
+]
+
+def test(program, solved_problems):
+    code = (program + '\n' +
+            server.problems.solutions_for_problems('prolog', solved_problems))
+
+    n_correct = 0
+    engine_id = None
+    try:
+        engine_id, output = prolog.engine.create(code=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
+    finally:
+        if engine_id:
+            prolog.engine.destroy(engine_id)
+
+    passed = n_correct == len(test_cases)
+    hints = [{'id': 'test_results', 'args': {'passed': n_correct, 'total': len(test_cases)}}]
+    return passed, hints
+
+def hint(program, solved_problems):
+    # TODO
+    return []