Fix rendering and representation of errors

- Error are sent as list
- Error are None if answer is fully correct
- Error is rendered as in grade user and code questions as neat CSS divs
- Fix corresponding test cases
- Fix get_question answers in models.py

1 files changed, 8 insertions, 3 deletions

diff --git a/yaksh/python_assertion_evaluator.py b/yaksh/python_assertion_evaluator.py
index 41ebeb6..d8cd07c 100644
--- a/yaksh/python_assertion_evaluator.py
+++ b/yaksh/python_assertion_evaluator.py
@@ -76,8 +76,13 @@ class PythonAssertionEvaluator(BaseEvaluator):
             info = traceback.extract_tb(tb)
             fname, lineno, func, text = info[-1]
             text = str(self.test_case)
-            err = ("-----\nExpected Test Case:\n{0}\n"
-                    "Error - {1} {2} in: {3}\n-----").format(self.test_case, type.__name__, str(value), text)
+            err = "Expected Test Case:\n{0}\n" \
+                "Error - {1} {2} in: {3}\n-----".format(
+                    self.test_case,
+                    type.__name__,
+                    str(value),
+                    text
+                    )
         except TimeoutException:
             raise
         except Exception:
@@ -85,7 +90,7 @@ class PythonAssertionEvaluator(BaseEvaluator):
             err = "Error in Test case: {0}".format(msg)
         else:
             success = True
-            err = '-----\nCorrect answer\nTest Case: {0}\n-----'.format(self.test_case)
+            err = None
             mark_fraction = float(self.weight) if self.partial_grading else 0.0
         del tb
         return success, err, mark_fraction