2 files changed, 47 insertions, 0 deletions
diff --git a/prolog/problems/license_plates/firstminus_2/common.py b/prolog/problems/license_plates/firstminus_2/common.py
index 20376d2..8831fe2 100644
--- a/prolog/problems/license_plates/firstminus_2/common.py
+++ b/prolog/problems/license_plates/firstminus_2/common.py
@@ -1,5 +1,9 @@
 # coding=utf-8
 
+from operator import itemgetter
+import prolog.engine
+import server.problems
+
 id = 147
 number = 54
 visible = True
@@ -10,3 +14,32 @@ firstMinus(L, L).
 firstMinus([X|T], [Y|T]) :-
   Y is -X.
 '''
+
+test_cases = [
+    ('firstMinus([2, 3, 4], X)',
+        [{'X': '[2, 3, 4]'}, {'X': '[-2, 3, 4]'}]),
+    ('firstMinus([5, 2, 3, 4], X)',
+        [{'X': '[5, 2, 3, 4]'}, {'X': '[-5, 2, 3, 4]'}]),
+]
+
+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
+    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 []
diff --git a/prolog/problems/license_plates/firstminus_2/sl.py b/prolog/problems/license_plates/firstminus_2/sl.py
new file mode 100644
index 0000000..d480994
--- /dev/null
+++ b/prolog/problems/license_plates/firstminus_2/sl.py
@@ -0,0 +1,14 @@
+# coding=utf-8
+
+name = 'firstMinus/2'
+slug = 'Negiraj prvi element v danem seznamu števil'
+
+description = '''\
+<p><code>firstMinus(L1, L2)</code>: seznam <code>L2</code> je enak kot <code>L1</code>, razen prvega elementa, ki je lahko negiran ali pa ne. Predikat naj vrne obe rešitvi, eno za drugo.</p>
+<pre>
+  ?- firstMinus([1,2,3], L).
+    L = [1,2,3] ;
+    L = [-1,2,3].
+</pre>'''
+
+hint = {}