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#!/usr/bin/env python
from __future__ import unicode_literals
import os
from os.path import isfile
import subprocess
# Local imports
from .base_evaluator import BaseEvaluator
from .file_utils import copy_files, delete_files
class JavaCodeEvaluator(BaseEvaluator):
"""Tests the Java code obtained from Code Server"""
def __init__(self, metadata, test_case_data):
self.files = []
self.compiled_user_answer = None
self.compiled_test_code = None
self.submit_code_path = ""
self.user_output_path = ""
self.ref_output_path = ""
# Set metadata values
self.user_answer = metadata.get('user_answer')
self.file_paths = metadata.get('file_paths')
self.partial_grading = metadata.get('partial_grading')
# Set test case data values
self.test_case = test_case_data.get('test_case')
self.weight = test_case_data.get('weight')
def teardown(self):
# Delete the created file.
if os.path.exists(self.submit_code_path):
os.remove(self.submit_code_path)
if os.path.exists(self.user_output_path):
os.remove(self.user_output_path)
if os.path.exists(self.ref_output_path):
os.remove(self.ref_output_path)
if os.path.exists(self.test_code_path):
os.remove(self.test_code_path)
if self.files:
delete_files(self.files)
def get_commands(self, clean_ref_code_path, user_code_directory):
compile_command = 'javac {0}'.format(self.submit_code_path),
compile_main = ('javac {0} -classpath '
'{1} -d {2}').format(clean_ref_code_path,
user_code_directory,
user_code_directory)
return compile_command, compile_main
def set_file_paths(self, directory, file_name):
output_path = "{0}{1}.class".format(directory, file_name)
return output_path
def compile_code(self):
if self.compiled_user_answer and self.compiled_test_code:
return None
else:
# create student code and moderator code file
self.submit_code_path = self.create_submit_code_file('Test.java')
self.test_code_path = self.create_submit_code_file('main.java')
self.write_to_submit_code_file(
self.submit_code_path, self.user_answer
)
self.write_to_submit_code_file(self.test_code_path, self.test_case)
clean_ref_code_path = self.test_code_path
if self.file_paths:
self.files = copy_files(self.file_paths)
if not isfile(clean_ref_code_path):
msg = "No file at %s or Incorrect path" % clean_ref_code_path
return False, msg
if not isfile(self.submit_code_path):
msg = "No file at %s or Incorrect path" % self.submit_code_path
return False, msg
user_code_directory = os.getcwd() + '/'
ref_file_name = (clean_ref_code_path.split('/')[-1]).split('.')[0]
self.user_output_path = self.set_file_paths(
user_code_directory, 'Test'
)
self.ref_output_path = self.set_file_paths(
user_code_directory, ref_file_name
)
compile_command, self.compile_main = self.get_commands(
clean_ref_code_path,
user_code_directory
)
self.run_command_args = "java -cp {0} {1}".format(
user_code_directory,
ref_file_name
)
self.compiled_user_answer = self._run_command(
compile_command,
shell=True,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE
)
self.compiled_test_code = self._run_command(
self.compile_main,
shell=True,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE
)
return self.compiled_user_answer, self.compiled_test_code
def check_code(self):
""" 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).
"""
success = False
mark_fraction = 0.0
proc, stdnt_out, stdnt_stderr = self.compiled_user_answer
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 == '':
proc, main_out, main_err = self.compiled_test_code
main_err = self._remove_null_substitute_char(main_err)
if main_err == '':
ret = self._run_command(self.run_command_args, shell=True,
stdin=None,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE)
proc, stdout, stderr = ret
if proc.returncode == 0:
success, err = True, None
mark_fraction = 1.0 if self.partial_grading else 0.0
else:
err = stdout + "\n" + stderr
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
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, mark_fraction
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