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-rw-r--r--testapp/exam/cpp_code_evaluator.py125
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diff --git a/testapp/exam/cpp_code_evaluator.py b/testapp/exam/cpp_code_evaluator.py
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+++ b/testapp/exam/cpp_code_evaluator.py
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+#!/usr/bin/env python
+import traceback
+import pwd
+import os
+from os.path import join, isfile
+import subprocess
+import importlib
+
+# local imports
+from code_evaluator import CodeEvaluator
+
+
+class CppCodeEvaluator(CodeEvaluator):
+ """Tests the C code obtained from Code Server"""
+ def __init__(self, test_case_data, test, language, user_answer,
+ ref_code_path=None, in_dir=None):
+ super(CppCodeEvaluator, self).__init__(test_case_data, test, language,
+ user_answer, ref_code_path,
+ in_dir)
+ self.submit_path = self.create_submit_code_file('submit.c')
+ self.test_case_args = self._setup()
+
+ # Private Protocol ##########
+ def _setup(self):
+ super(CppCodeEvaluator, self)._setup()
+
+ get_ref_path = self.ref_code_path
+ ref_path, test_case_path = self._set_test_code_file_path(get_ref_path)
+
+ # Set file paths
+ c_user_output_path = os.getcwd() + '/output'
+ c_ref_output_path = os.getcwd() + '/executable'
+
+ # Set command variables
+ compile_command = 'g++ {0} -c -o {1}'.format(self.submit_path,
+ c_user_output_path)
+ compile_main = 'g++ {0} {1} -o {2}'.format(ref_path,
+ c_user_output_path,
+ c_ref_output_path)
+ run_command_args = [c_ref_output_path]
+ remove_user_output = c_user_output_path
+ remove_ref_output = c_ref_output_path
+
+ return (ref_path, self.submit_path, compile_command, compile_main,
+ run_command_args, remove_user_output, remove_ref_output)
+
+ def _teardown(self):
+ # Delete the created file.
+ super(CppCodeEvaluator, self)._teardown()
+ os.remove(self.submit_path)
+
+ def _check_code(self, ref_code_path, submit_code_path, compile_command,
+ compile_main, run_command_args, remove_user_output,
+ remove_ref_output):
+ """ Function validates student code using instructor code as
+ reference.The first argument ref_code_path, is the path to
+ instructor code, it is assumed to have executable permission.
+ The second argument submit_code_path, is the path to the student
+ code, it is assumed to have executable permission.
+
+ Returns
+ --------
+
+ returns (True, "Correct answer") : If the student function returns
+ expected output when called by reference code.
+
+ returns (False, error_msg): If the student function fails to return
+ expected output when called by reference code.
+
+ Returns (False, error_msg): If mandatory arguments are not files or
+ if the required permissions are not given to the file(s).
+
+ """
+ if not isfile(ref_code_path):
+ return False, "No file at %s or Incorrect path" % ref_code_path
+ if not isfile(submit_code_path):
+ return False, 'No file at %s or Incorrect path' % submit_code_path
+
+ success = False
+ ret = self._compile_command(compile_command)
+ proc, stdnt_stderr = ret
+ stdnt_stderr = self._remove_null_substitute_char(stdnt_stderr)
+
+ # Only if compilation is successful, the program is executed
+ # And tested with testcases
+ if stdnt_stderr == '':
+ ret = self._compile_command(compile_main)
+ proc, main_err = ret
+ main_err = self._remove_null_substitute_char(main_err)
+
+ if main_err == '':
+ ret = self._run_command(run_command_args, stdin=None,
+ stdout=subprocess.PIPE,
+ stderr=subprocess.PIPE)
+ proc, stdout, stderr = ret
+ if proc.returncode == 0:
+ success, err = True, "Correct answer"
+ else:
+ err = stdout + "\n" + stderr
+ os.remove(remove_ref_output)
+ else:
+ err = "Error:"
+ try:
+ error_lines = main_err.splitlines()
+ for e in error_lines:
+ if ':' in e:
+ err = err + "\n" + e.split(":", 1)[1]
+ else:
+ err = err + "\n" + e
+ except:
+ err = err + "\n" + main_err
+ os.remove(remove_user_output)
+ else:
+ err = "Compilation Error:"
+ try:
+ error_lines = stdnt_stderr.splitlines()
+ for e in error_lines:
+ if ':' in e:
+ err = err + "\n" + e.split(":", 1)[1]
+ else:
+ err = err + "\n" + e
+ except:
+ err = err + "\n" + stdnt_stderr
+
+ return success, err