1 files changed, 101 insertions, 0 deletions
diff --git a/python/problems/for-fkkt/min/common.py b/python/problems/for-fkkt/min/common.py
new file mode 100644
index 0000000..ede7619
--- /dev/null
+++ b/python/problems/for-fkkt/min/common.py
@@ -0,0 +1,101 @@
+import re
+from python.util import has_token_sequence, string_almost_equal, \
+    string_contains_number, get_tokens, get_numbers, get_exception_desc
+from server.hints import Hint
+
+id = 25013
+number = 1
+visible = True
+
+solution = '''\
+seznam = [23, 42, 87, 34, 1, -3, 2]
+minimum = seznam[0]
+for elt in seznam:
+    if elt < minimum:
+        minimum = elt
+print(minimum)
+'''
+
+hint_type = {
+    'no_xs': Hint('no_xs'),
+    'for_loop': Hint('for_loop'),
+    'if_clause': Hint('if_clause'),
+    'printing': Hint('printing'),
+    'no_min': Hint('no_min'),
+    'final_hint': Hint('final_hint')
+}
+
+def test(python, code, aux_code=''):
+    tokens = get_tokens(code)
+
+    if has_token_sequence(tokens, ['min', '(']):
+        return False, [{'id': 'no_min'}]
+
+    test_xs = [[5, 4, -7, 2, 12, -3, -4, 11, 2],
+               [0],
+               [3, 1, 2, 8],
+               [1, 2, 3, 42],
+               [23, 42, 87, 34, 1, -3, 2]]
+    test_out = [
+        '-7',
+        '0',
+        '1',
+        '1',
+        '-3'
+    ]
+
+    n_correct = 0
+    tin = None
+    for xs_i, xs in enumerate(test_xs):
+        # change code to contain new xs instead of the one
+        # given by user
+        tcode = re.sub(r'^seznam\s*=\s*\[.*?\]',
+                       'seznam = ' + str(xs),
+                       code,
+                       flags = re.DOTALL | re.MULTILINE)
+
+        # use python session to call tcode
+        answers = python(code=aux_code+tcode, inputs=[(None, None)], timeout=1.0)
+        output = answers[0][1]
+
+        if output.rstrip().endswith(test_out[xs_i]):
+            n_correct += 1
+        else:
+            tin = test_xs[xs_i]
+            tout = test_out[xs_i]
+
+    passed = n_correct == len(test_xs)
+    hints = [{'id': 'test_results', 'args': {'passed': n_correct, 'total': len(test_xs)}}]
+    if tin != None:
+        hints.append({'id': 'problematic_test_case', 'args': {'testin': str(tin), 'testout': str(tout)}})
+    else:
+        hints.append({'id' : 'final_hint'})
+    return passed, hints
+
+def hint(python, code, aux_code=''):
+    # run one test first to see if there are any exceptions
+    answer = python(code=aux_code+code, inputs=[(None, None)], timeout=1.0)
+    exc = get_exception_desc(answer[0][3])
+    if exc: return exc
+
+    tokens = get_tokens(code)
+
+    # if has no xs, tell him to ask for values
+    if not has_token_sequence(tokens, ['seznam', '=', '[']):
+        return [{'id' : 'no_xs'}]
+
+    # student does not have for: instruct him on loops
+    if not has_token_sequence(tokens, ['for']):
+        return [{'id' : 'for_loop'}]
+
+    if has_token_sequence(tokens, ['min', '(']):
+        return [{'id': 'no_min'}]
+
+    if not has_token_sequence(tokens, ['if']):
+        return [{'id' : 'if_clause'}]
+
+    # student is not using print function
+    if not has_token_sequence(tokens, ['print']):
+        return [{'id' : 'printing'}]
+
+    return None