2 files changed, 50 insertions, 0 deletions
diff --git a/prolog/problems/sorting/pivoting_4/common.py b/prolog/problems/sorting/pivoting_4/common.py
index dd1a1a9..3a3a906 100644
--- a/prolog/problems/sorting/pivoting_4/common.py
+++ b/prolog/problems/sorting/pivoting_4/common.py
@@ -1,5 +1,9 @@
 # coding=utf-8
 
+from operator import itemgetter
+import prolog.engine
+import server.problems
+
 id = 124
 number = 31
 visible = True
@@ -14,3 +18,36 @@ pivoting(P, [H|T], S, [H|G]) :-
   H > P,
   pivoting(P, T, S, G).
 '''
+
+test_cases = [
+    ('pivoting(5, [], A, B)',
+        [{'A': '[]', 'B': '[]'}]),
+    ('pivoting(5, [6, 7, 6], A, B)',
+        [{'A': '[]', 'B': '[6, 7, 6]'}]),
+    ('pivoting(4, [2, 1, 8, 9, 3, 4, 2], A, B)',
+        [{'A': '[2, 1, 3, 4, 2]', 'B': '[8, 9]'}]),
+    ('pivoting(4, [22, 1, 0, 8, 3, 5, 7, -2], A, B)',
+        [{'A': '[1, 0, 3, -2]', 'B': '[22, 8, 5, 7]'}]),
+]
+
+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/sorting/pivoting_4/sl.py b/prolog/problems/sorting/pivoting_4/sl.py
new file mode 100644
index 0000000..b18e112
--- /dev/null
+++ b/prolog/problems/sorting/pivoting_4/sl.py
@@ -0,0 +1,13 @@
+# coding=utf-8
+
+name = 'pivoting/4'
+slug = 'Razdeli seznam na dva dela glede na podani element (pivot)'
+
+description = '''\
+<p><code>pivoting(P, L, S, G)</code>: seznam <code>S</code> vsebuje elemente iz <code>L</code> <em>manjše ali enake</em> <code>P</code>, seznam <code>G</code> pa elemente iz <code>L</code> <em>večje od</em> <code>P</code>. Vrstni red elementov v <code>S</code> in <code>G</code> naj bo enak kot v <code>L</code>.</p>
+<pre>
+  ?- pivoting(4, [1,4,5,8,6,4,2], S, G).
+    S = [1,4,4,2], G = [5,8,6].
+</pre>'''
+
+hint = {}