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-rw-r--r--testapp/exam/evaluators/__init__.py0
-rw-r--r--testapp/exam/evaluators/bash_code_evaluator.py122
-rw-r--r--testapp/exam/evaluators/code_evaluator.py206
-rw-r--r--testapp/exam/evaluators/cpp_code_evaluator.py125
-rw-r--r--testapp/exam/evaluators/java_code_evaluator.py128
-rw-r--r--testapp/exam/evaluators/language_registry.py36
-rw-r--r--testapp/exam/evaluators/python_code_evaluator.py61
-rw-r--r--testapp/exam/evaluators/scilab_code_evaluator.py105
8 files changed, 783 insertions, 0 deletions
diff --git a/testapp/exam/evaluators/__init__.py b/testapp/exam/evaluators/__init__.py
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/testapp/exam/evaluators/__init__.py
diff --git a/testapp/exam/evaluators/bash_code_evaluator.py b/testapp/exam/evaluators/bash_code_evaluator.py
new file mode 100644
index 0000000..a468fd7
--- /dev/null
+++ b/testapp/exam/evaluators/bash_code_evaluator.py
@@ -0,0 +1,122 @@
+#!/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 BashCodeEvaluator(CodeEvaluator):
+ """Tests the Bash code obtained from Code Server"""
+ def __init__(self, test_case_data, test, language, user_answer,
+ ref_code_path=None, in_dir=None):
+ super(BashCodeEvaluator, self).__init__(test_case_data, test, language, user_answer,
+ ref_code_path, in_dir)
+ self.test_case_args = self._setup()
+
+ # Private Protocol ##########
+ def _setup(self):
+ super(BashCodeEvaluator, self)._setup()
+
+ self.submit_path = self.create_submit_code_file('submit.sh')
+ self._set_file_as_executable(self.submit_path)
+ get_ref_path, get_test_case_path = self.ref_code_path.strip().split(',')
+ get_ref_path = get_ref_path.strip()
+ get_test_case_path = get_test_case_path.strip()
+ ref_path, test_case_path = self._set_test_code_file_path(get_ref_path,
+ get_test_case_path)
+
+ return ref_path, self.submit_path, test_case_path
+
+ def _teardown(self):
+ # Delete the created file.
+ super(BashCodeEvaluator, self)._teardown()
+ os.remove(self.submit_path)
+
+ def _check_code(self, ref_path, submit_path,
+ test_case_path=None):
+ """ Function validates student script using instructor script as
+ reference. Test cases can optionally be provided. The first argument
+ ref_path, is the path to instructor script, it is assumed to
+ have executable permission. The second argument submit_path, is
+ the path to the student script, it is assumed to have executable
+ permission. The Third optional argument is the path to test the
+ scripts. Each line in this file is a test case and each test case is
+ passed to the script as standard arguments.
+
+ Returns
+ --------
+
+ returns (True, "Correct answer") : If the student script passes all
+ test cases/have same output, when compared to the instructor script
+
+ returns (False, error_msg): If the student script fails a single
+ test/have dissimilar output, when compared to the instructor script.
+
+ 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_path):
+ return False, "No file at %s or Incorrect path" % ref_path
+ if not isfile(submit_path):
+ return False, "No file at %s or Incorrect path" % submit_path
+ if not os.access(ref_path, os.X_OK):
+ return False, "Script %s is not executable" % ref_path
+ if not os.access(submit_path, os.X_OK):
+ return False, "Script %s is not executable" % submit_path
+
+ success = False
+
+ if test_case_path is None or "":
+ ret = self._run_command(ref_path, stdin=None,
+ stdout=subprocess.PIPE,
+ stderr=subprocess.PIPE)
+ proc, inst_stdout, inst_stderr = ret
+ ret = self._run_command(submit_path, stdin=None,
+ stdout=subprocess.PIPE,
+ stderr=subprocess.PIPE)
+ proc, stdnt_stdout, stdnt_stderr = ret
+ if inst_stdout == stdnt_stdout:
+ return True, "Correct answer"
+ else:
+ err = "Error: expected %s, got %s" % (inst_stderr,
+ stdnt_stderr)
+ return False, err
+ else:
+ if not isfile(test_case_path):
+ return False, "No test case at %s" % test_case_path
+ if not os.access(ref_path, os.R_OK):
+ return False, "Test script %s, not readable" % test_case_path
+ # valid_answer is True, so that we can stop once a test case fails
+ valid_answer = True
+ # loop_count has to be greater than or equal to one.
+ # Useful for caching things like empty test files,etc.
+ loop_count = 0
+ test_cases = open(test_case_path).readlines()
+ num_lines = len(test_cases)
+ for test_case in test_cases:
+ loop_count += 1
+ if valid_answer:
+ args = [ref_path] + [x for x in test_case.split()]
+ ret = self._run_command(args, stdin=None,
+ stdout=subprocess.PIPE,
+ stderr=subprocess.PIPE)
+ proc, inst_stdout, inst_stderr = ret
+ args = [submit_path]+[x for x in test_case.split()]
+ ret = self._run_command(args, stdin=None,
+ stdout=subprocess.PIPE,
+ stderr=subprocess.PIPE)
+ proc, stdnt_stdout, stdnt_stderr = ret
+ valid_answer = inst_stdout == stdnt_stdout
+ if valid_answer and (num_lines == loop_count):
+ return True, "Correct answer"
+ else:
+ err = "Error:expected %s, got %s" % (inst_stdout+inst_stderr,
+ stdnt_stdout+stdnt_stderr)
+ return False, err
+
diff --git a/testapp/exam/evaluators/code_evaluator.py b/testapp/exam/evaluators/code_evaluator.py
new file mode 100644
index 0000000..381b2e8
--- /dev/null
+++ b/testapp/exam/evaluators/code_evaluator.py
@@ -0,0 +1,206 @@
+import sys
+from SimpleXMLRPCServer import SimpleXMLRPCServer
+import pwd
+import os
+import stat
+from os.path import isdir, dirname, abspath, join, isfile
+import signal
+from multiprocessing import Process, Queue
+import subprocess
+import re
+import json
+# Local imports.
+from settings import SERVER_TIMEOUT
+
+
+MY_DIR = abspath(dirname(__file__))
+
+
+# Raised when the code times-out.
+# c.f. http://pguides.net/python/timeout-a-function
+class TimeoutException(Exception):
+ pass
+
+
+def timeout_handler(signum, frame):
+ """A handler for the ALARM signal."""
+ raise TimeoutException('Code took too long to run.')
+
+
+def create_signal_handler():
+ """Add a new signal handler for the execution of this code."""
+ prev_handler = signal.signal(signal.SIGALRM, timeout_handler)
+ signal.alarm(SERVER_TIMEOUT)
+ return prev_handler
+
+
+def set_original_signal_handler(old_handler=None):
+ """Set back any original signal handler."""
+ if old_handler is not None:
+ signal.signal(signal.SIGALRM, old_handler)
+ return
+ else:
+ raise Exception("Signal Handler: object cannot be NoneType")
+
+
+def delete_signal_handler():
+ signal.alarm(0)
+ return
+
+
+class CodeEvaluator(object):
+ """Tests the code obtained from Code Server"""
+ def __init__(self, test_case_data, test, language, user_answer,
+ ref_code_path=None, in_dir=None):
+ msg = 'Code took more than %s seconds to run. You probably '\
+ 'have an infinite loop in your code.' % SERVER_TIMEOUT
+ self.timeout_msg = msg
+ self.test_case_data = test_case_data
+ self.language = language.lower()
+ self.user_answer = user_answer
+ self.ref_code_path = ref_code_path
+ self.test = test
+ self.in_dir = in_dir
+ self.test_case_args = None
+
+ # Public Protocol ##########
+ @classmethod
+ def from_json(cls, language, json_data, in_dir):
+ json_data = json.loads(json_data)
+ test_case_data = json_data.get("test_case_data")
+ user_answer = json_data.get("user_answer")
+ ref_code_path = json_data.get("ref_code_path")
+ test = json_data.get("test")
+
+ instance = cls(test_case_data, test, language, user_answer, ref_code_path,
+ in_dir)
+ return instance
+
+ def evaluate(self):
+ """Evaluates given code with the test cases based on
+ given arguments in test_case_data.
+
+ The ref_code_path is a path to the reference code.
+ The reference code will call the function submitted by the student.
+ The reference code will check for the expected output.
+
+ If the path's start with a "/" then we assume they are absolute paths.
+ If not, we assume they are relative paths w.r.t. the location of this
+ code_server script.
+
+ If the optional `in_dir` keyword argument is supplied it changes the
+ directory to that directory (it does not change it back to the original
+ when done).
+
+ Returns
+ -------
+
+ A tuple: (success, error message).
+ """
+
+ self._setup()
+ success, err = self._evaluate(self.test_case_args)
+ self._teardown()
+
+ result = {'success': success, 'error': err}
+ return result
+
+ # Private Protocol ##########
+ def _setup(self):
+ self._change_dir(self.in_dir)
+
+ def _evaluate(self, args):
+ # Add a new signal handler for the execution of this code.
+ prev_handler = create_signal_handler()
+ success = False
+ args = args or []
+
+ # Do whatever testing needed.
+ try:
+ success, err = self._check_code(*args)
+
+ except TimeoutException:
+ err = self.timeout_msg
+ except:
+ _type, value = sys.exc_info()[:2]
+ err = "Error: {0}".format(repr(value))
+ finally:
+ # Set back any original signal handler.
+ set_original_signal_handler(prev_handler)
+
+ return success, err
+
+ def _teardown(self):
+ # Cancel the signal
+ delete_signal_handler()
+
+ def _check_code(self):
+ raise NotImplementedError("check_code method not implemented")
+
+ def create_submit_code_file(self, file_name):
+ """ Write the code (`answer`) to a file and set the file path"""
+ submit_f = open(file_name, 'w')
+ submit_f.write(self.user_answer.lstrip())
+ submit_f.close()
+ submit_path = abspath(submit_f.name)
+
+ return submit_path
+
+ def _set_file_as_executable(self, fname):
+ os.chmod(fname, stat.S_IRUSR | stat.S_IWUSR | stat.S_IXUSR
+ | stat.S_IRGRP | stat.S_IWGRP | stat.S_IXGRP
+ | stat.S_IROTH | stat.S_IWOTH | stat.S_IXOTH)
+
+ def _set_test_code_file_path(self, ref_path=None, test_case_path=None):
+ if ref_path and not ref_path.startswith('/'):
+ ref_path = join(MY_DIR, ref_path)
+
+ if test_case_path and not test_case_path.startswith('/'):
+ test_case_path = join(MY_DIR, test_case_path)
+
+ return ref_path, test_case_path
+
+ def _run_command(self, cmd_args, *args, **kw):
+ """Run a command in a subprocess while blocking, the process is killed
+ if it takes more than 2 seconds to run. Return the Popen object, the
+ stdout and stderr.
+ """
+ try:
+ proc = subprocess.Popen(cmd_args, *args, **kw)
+ stdout, stderr = proc.communicate()
+ except TimeoutException:
+ # Runaway code, so kill it.
+ proc.kill()
+ # Re-raise exception.
+ raise
+ return proc, stdout, stderr
+
+ def _compile_command(self, cmd, *args, **kw):
+ """Compiles C/C++/java code and returns errors if any.
+ Run a command in a subprocess while blocking, the process is killed
+ if it takes more than 2 seconds to run. Return the Popen object, the
+ stderr.
+ """
+ try:
+ proc_compile = subprocess.Popen(cmd, shell=True, stdin=None,
+ stdout=subprocess.PIPE,
+ stderr=subprocess.PIPE)
+ out, err = proc_compile.communicate()
+ except TimeoutException:
+ # Runaway code, so kill it.
+ proc_compile.kill()
+ # Re-raise exception.
+ raise
+ return proc_compile, err
+
+ def _change_dir(self, in_dir):
+ if in_dir is not None and isdir(in_dir):
+ os.chdir(in_dir)
+
+ def _remove_null_substitute_char(self, string):
+ """Returns a string without any null and substitute characters"""
+ stripped = ""
+ for c in string:
+ if ord(c) is not 26 and ord(c) is not 0:
+ stripped = stripped + c
+ return ''.join(stripped)
diff --git a/testapp/exam/evaluators/cpp_code_evaluator.py b/testapp/exam/evaluators/cpp_code_evaluator.py
new file mode 100644
index 0000000..7242884
--- /dev/null
+++ b/testapp/exam/evaluators/cpp_code_evaluator.py
@@ -0,0 +1,125 @@
+#!/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.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)
+ self.submit_path = self.create_submit_code_file('submit.c')
+
+ # 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
diff --git a/testapp/exam/evaluators/java_code_evaluator.py b/testapp/exam/evaluators/java_code_evaluator.py
new file mode 100644
index 0000000..4367259
--- /dev/null
+++ b/testapp/exam/evaluators/java_code_evaluator.py
@@ -0,0 +1,128 @@
+#!/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 JavaCodeEvaluator(CodeEvaluator):
+ """Tests the Java code obtained from Code Server"""
+ def __init__(self, test_case_data, test, language, user_answer,
+ ref_code_path=None, in_dir=None):
+ super(JavaCodeEvaluator, self).__init__(test_case_data, test,
+ language, user_answer,
+ ref_code_path, in_dir)
+ self.test_case_args = self._setup()
+
+ # Private Protocol ##########
+ def _setup(self):
+ super(JavaCodeEvaluator, self)._setup()
+
+ ref_path, test_case_path = self._set_test_code_file_path(self.ref_code_path)
+ self.submit_path = self.create_submit_code_file('Test.java')
+
+ # Set file paths
+ java_student_directory = os.getcwd() + '/'
+ java_ref_file_name = (ref_path.split('/')[-1]).split('.')[0]
+
+ # Set command variables
+ compile_command = 'javac {0}'.format(self.submit_path),
+ compile_main = ('javac {0} -classpath '
+ '{1} -d {2}').format(ref_path,
+ java_student_directory,
+ java_student_directory)
+ run_command_args = "java -cp {0} {1}".format(java_student_directory,
+ java_ref_file_name)
+ remove_user_output = "{0}{1}.class".format(java_student_directory,
+ 'Test')
+ remove_ref_output = "{0}{1}.class".format(java_student_directory,
+ java_ref_file_name)
+
+ 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(JavaCodeEvaluator, 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, shell=True,
+ 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
diff --git a/testapp/exam/evaluators/language_registry.py b/testapp/exam/evaluators/language_registry.py
new file mode 100644
index 0000000..76a23d7
--- /dev/null
+++ b/testapp/exam/evaluators/language_registry.py
@@ -0,0 +1,36 @@
+from settings import code_evaluators
+import importlib
+
+registry = None
+
+def set_registry():
+ global registry
+ registry = _LanguageRegistry()
+
+def get_registry():
+ return registry
+
+class _LanguageRegistry(object):
+ def __init__(self):
+ self._register = {}
+ for language, module in code_evaluators.iteritems():
+ self._register[language] = None
+
+ # Public Protocol ##########
+ def get_class(self, language):
+ """ Get the code evaluator class for the given language """
+ if not self._register.get(language):
+ self._register[language] = code_evaluators.get(language)
+
+ cls = self._register[language]
+ module_name, class_name = cls.rsplit(".", 1)
+ # load the module, will raise ImportError if module cannot be loaded
+ get_module = importlib.import_module(module_name)
+ # get the class, will raise AttributeError if class cannot be found
+ get_class = getattr(get_module, class_name)
+ return get_class
+
+ def register(self, language, class_name):
+ """ Register a new code evaluator class for language"""
+ self._register[language] = class_name
+
diff --git a/testapp/exam/evaluators/python_code_evaluator.py b/testapp/exam/evaluators/python_code_evaluator.py
new file mode 100644
index 0000000..0c473cf
--- /dev/null
+++ b/testapp/exam/evaluators/python_code_evaluator.py
@@ -0,0 +1,61 @@
+#!/usr/bin/env python
+import sys
+import traceback
+import os
+from os.path import join
+import importlib
+
+# local imports
+from code_evaluator import CodeEvaluator
+
+
+class PythonCodeEvaluator(CodeEvaluator):
+ """Tests the Python code obtained from Code Server"""
+ # Private Protocol ##########
+ def _check_code(self):
+ success = False
+
+ try:
+ tb = None
+ test_code = self._create_test_case()
+ submitted = compile(self.user_answer, '<string>', mode='exec')
+ g = {}
+ exec submitted in g
+ _tests = compile(test_code, '<string>', mode='exec')
+ exec _tests in g
+ except AssertionError:
+ type, value, tb = sys.exc_info()
+ info = traceback.extract_tb(tb)
+ fname, lineno, func, text = info[-1]
+ text = str(test_code).splitlines()[lineno-1]
+ err = "{0} {1} in: {2}".format(type.__name__, str(value), text)
+ else:
+ success = True
+ err = 'Correct answer'
+
+ del tb
+ return success, err
+
+ def _create_test_case(self):
+ """
+ Create assert based test cases in python
+ """
+ test_code = ""
+ if self.test:
+ return self.test
+ elif self.test_case_data:
+ for test_case in self.test_case_data:
+ pos_args = ", ".join(str(i) for i in test_case.get('pos_args')) \
+ if test_case.get('pos_args') else ""
+ kw_args = ", ".join(str(k+"="+a) for k, a
+ in test_case.get('kw_args').iteritems()) \
+ if test_case.get('kw_args') else ""
+ args = pos_args + ", " + kw_args if pos_args and kw_args \
+ else pos_args or kw_args
+ function_name = test_case.get('func_name')
+ expected_answer = test_case.get('expected_answer')
+
+ tcode = "assert {0}({1}) == {2}".format(function_name, args,
+ expected_answer)
+ test_code += tcode + "\n"
+ return test_code
diff --git a/testapp/exam/evaluators/scilab_code_evaluator.py b/testapp/exam/evaluators/scilab_code_evaluator.py
new file mode 100644
index 0000000..392cd45
--- /dev/null
+++ b/testapp/exam/evaluators/scilab_code_evaluator.py
@@ -0,0 +1,105 @@
+#!/usr/bin/env python
+import traceback
+import os
+from os.path import join, isfile
+import subprocess
+import re
+import importlib
+
+# local imports
+from code_evaluator import CodeEvaluator
+
+
+class ScilabCodeEvaluator(CodeEvaluator):
+ """Tests the Scilab code obtained from Code Server"""
+ def __init__(self, test_case_data, test, language, user_answer,
+ ref_code_path=None, in_dir=None):
+ super(ScilabCodeEvaluator, self).__init__(test_case_data, test,
+ language, user_answer,
+ ref_code_path, in_dir)
+
+ # Removes all the commands that terminates scilab
+ self.user_answer, self.terminate_commands = self._remove_scilab_exit(user_answer.lstrip())
+ self.test_case_args = self._setup()
+
+ # Private Protocol ##########
+ def _setup(self):
+ super(ScilabCodeEvaluator, self)._setup()
+
+ ref_path, test_case_path = self._set_test_code_file_path(self.ref_code_path)
+ self.submit_path = self.create_submit_code_file('function.sci')
+
+ return ref_path, # Return as a tuple
+
+ def _teardown(self):
+ # Delete the created file.
+ super(ScilabCodeEvaluator, self)._teardown()
+ os.remove(self.submit_path)
+
+ def _check_code(self, ref_path):
+ success = False
+
+ # Throw message if there are commmands that terminates scilab
+ add_err=""
+ if self.terminate_commands:
+ add_err = "Please do not use exit, quit and abort commands in your\
+ code.\n Otherwise your code will not be evaluated\
+ correctly.\n"
+
+ cmd = 'printf "lines(0)\nexec(\'{0}\',2);\nquit();"'.format(ref_path)
+ cmd += ' | timeout 8 scilab-cli -nb'
+ ret = self._run_command(cmd,
+ shell=True,
+ stdout=subprocess.PIPE,
+ stderr=subprocess.PIPE)
+ proc, stdout, stderr = ret
+
+ # Get only the error.
+ stderr = self._get_error(stdout)
+ if stderr is None:
+ # Clean output
+ stdout = self._strip_output(stdout)
+ if proc.returncode == 5:
+ success, err = True, "Correct answer"
+ else:
+ err = add_err + stdout
+ else:
+ err = add_err + stderr
+
+ return success, err
+
+ def _remove_scilab_exit(self, string):
+ """
+ Removes exit, quit and abort from the scilab code
+ """
+ new_string = ""
+ terminate_commands = False
+ for line in string.splitlines():
+ new_line = re.sub(r"exit.*$", "", line)
+ new_line = re.sub(r"quit.*$", "", new_line)
+ new_line = re.sub(r"abort.*$", "", new_line)
+ if line != new_line:
+ terminate_commands = True
+ new_string = new_string + '\n' + new_line
+ return new_string, terminate_commands
+
+ def _get_error(self, string):
+ """
+ Fetches only the error from the string.
+ Returns None if no error.
+ """
+ obj = re.search("!.+\n.+", string)
+ if obj:
+ return obj.group()
+ return None
+
+ def _strip_output(self, out):
+ """
+ Cleans whitespace from the output
+ """
+ strip_out = "Message"
+ for l in out.split('\n'):
+ if l.strip():
+ strip_out = strip_out+"\n"+l.strip()
+ return strip_out
+
generated by cgit (git 2.34.1) at 2025-01-10 10:33:42 +0000