Denotational semantics, part #1: tests and translations added.

3 files changed, 75 insertions, 0 deletions

diff --git a/prolog/problems/denotational_semantics/prog_listswap_3/common.py b/prolog/problems/denotational_semantics/prog_listswap_3/common.py
index 800717e..f8238c6 100644
--- a/prolog/problems/denotational_semantics/prog_listswap_3/common.py
+++ b/prolog/problems/denotational_semantics/prog_listswap_3/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 = 174
 number = 20
 visible = True
@@ -48,3 +55,32 @@ instr((R0,C0)-->(R,C0)) -->
     [swap],
     { swap(R0, C0, R) }.
 '''
+
+test_cases = [
+    ('findall(W, (W = [_], prog_listswap(_, W, [])), Words), Words == []',
+        [{}]),
+    ('prog_listswap([1,2,3,4]-->Out, [begin,right,right,swap,end], []), Out == [1,3,2,4]',
+        [{}]),
+    ('prog_listswap([a,b,c,d,e]-->Out, [begin,right,right,swap,left,swap,end], []), Out == [c,a,b,d,e]',
+        [{}]),
+]
+
+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
+
diff --git a/prolog/problems/denotational_semantics/prog_listswap_3/en.py b/prolog/problems/denotational_semantics/prog_listswap_3/en.py
index e275335..d357e3e 100644
--- a/prolog/problems/denotational_semantics/prog_listswap_3/en.py
+++ b/prolog/problems/denotational_semantics/prog_listswap_3/en.py
@@ -33,6 +33,8 @@ Helper predicates (already defined):
 swapping the <code>I</code>th element with its left neighbor in
 <code>List</code></li>
 </ul>
+
+<p>This exercise has already been solved for you. Check how it works in the console.</p>
 '''
 
 hint = {}
diff --git a/prolog/problems/denotational_semantics/prog_listswap_3/sl.py b/prolog/problems/denotational_semantics/prog_listswap_3/sl.py
new file mode 100644
index 0000000..4d009a7
--- /dev/null
+++ b/prolog/problems/denotational_semantics/prog_listswap_3/sl.py
@@ -0,0 +1,37 @@
+name = 'prog_listswap/3'
+slug = 'jezik za rokovanje s seznami s pomenom'
+
+description = '''\
+<p>
+Napiši DCG za rokovanje s seznami. Prvi simbol vsake besede je <code>[begin]</code>, temu pa sledi
+poljubno zaporedje "ukazov" iz nabora {<code>left</code>, <code>right</code>, <code>swap</code>},
+na koncu pa je simbol <code>[end]</code>. Začetni nekončni simbol naj se imenuje <code>prog_listswap</code>.
+</p>
+
+<p>
+Pomen besede (programa) v tem jeziku ima obliko <code>In-->Out</code> in pomeni preslikavo
+med vhodnim seznamom <code>In</code> in izhodnim seznamom <code>Out</code>. Notranje stanje
+gramatike, hranjeno v argumentih nekončnih simbolov, poleg trenutnega stanja seznama vodi tudi
+pozicijo kurzorja s katerim rokujemo s seznamom. Ukaza <code>left</code> in <code>right</code>
+kurzor premakneta za eno mesto v ustrezno smer, ukaz <code>swap</code> pa zamenja mesti elementov
+med katerima stoji kurzor. Če je kurzor na začetku seznama, ukaz <code>swap</code> ne uspe.
+</p>
+
+<pre>
+?- prog_listswap([1,2,3,4]-->Out, [begin,right,swap,end], []).
+  Out = [2,1,3,4].
+</pre>
+
+<p>
+Pomožni predikat (že definiran):
+</p>
+<ul>
+<li><code>swap(List,I,NewList)</code> ustvari nov seznam <code>NewList</code> tako, da
+zamenja mesti <code>I</code>-tega elementa in njegovega levega soseda v seznamu
+<code>List</code></li>
+</ul>
+
+<p>Ta naloga je že rešena. Preveri kako deluje v konzoli.</p>
+'''
+
+hint = {}