1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
|
#!/usr/bin/env python
from __future__ import unicode_literals
import traceback
import pwd
import os
from os.path import join, isfile
import sys
import subprocess
import importlib
# local imports
from .base_evaluator import BaseEvaluator
from .file_utils import copy_files, delete_files
class BashCodeEvaluator(BaseEvaluator):
# Private Protocol ##########
def __init__(self, metadata, test_case_data):
self.files = []
self.submit_code_path = ""
self.test_code_path = ""
self.tc_args_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.test_case_args = test_case_data.get('test_case_args')
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.test_code_path):
os.remove(self.test_code_path)
if os.path.exists(self.tc_args_path):
os.remove(self.tc_args_path)
if self.files:
delete_files(self.files)
def check_code(self):
""" 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
--------
success - Boolean, indicating if code was executed successfully, correctly
weight - Float, indicating total weight of all successful test cases
error - String, error message if success is false
returns (True, "Correct answer", 1.0) : If the student script passes all
test cases/have same output, when compared to the instructor script
returns (False, error_msg, 0.0): If the student script fails a single
test/have dissimilar output, when compared to the instructor script.
Returns (False, error_msg, 0.0): If mandatory arguments are not files or if
the required permissions are not given to the file(s).
"""
success = False
mark_fraction = 0.0
self.submit_code_path = self.create_submit_code_file('submit.sh')
self._set_file_as_executable(self.submit_code_path)
self.test_code_path = self.create_submit_code_file('main.sh')
self._set_file_as_executable(self.test_code_path)
if self.test_case_args:
self.tc_args_path = self.create_submit_code_file('main.args')
self.write_to_submit_code_file(self.tc_args_path, self.test_case_args)
self.user_answer = self.user_answer.replace("\r", "")
self.test_case = self.test_case.replace("\r", "")
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, clean_test_case_path = self.test_code_path, self.tc_args_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, 0.0
if not isfile(self.submit_code_path):
msg = "No file at %s or Incorrect path" % self.submit_code_path
return False, msg, 0.0
if not os.access(clean_ref_code_path, os.X_OK):
msg = "Script %s is not executable" % clean_ref_code_path
return False, msg, 0.0
if not os.access(self.submit_code_path, os.X_OK):
msg = "Script %s is not executable" % self.submit_code_path
return False, msg, 0.0
if not clean_test_case_path:
ret = self._run_command(clean_ref_code_path,
stdin=None,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE
)
proc, inst_stdout, inst_stderr = ret
ret = self._run_command(self.submit_code_path,
stdin=None,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE
)
proc, stdnt_stdout, stdnt_stderr = ret
if inst_stdout == stdnt_stdout:
mark_fraction = float(self.weight) if self.partial_grading else 0.0
return True, "Correct answer", mark_fraction
else:
err = "Error: expected %s, got %s" % (inst_stdout + inst_stderr,
stdnt_stdout + stdnt_stderr
)
return False, err, 0.0
else:
if not isfile(clean_test_case_path):
msg = "No test case at %s" % clean_test_case_path
return False, msg, 0.0
if not os.access(clean_ref_code_path, os.R_OK):
msg = "Test script %s, not readable" % clean_test_case_path
return False, msg, 0.0
# 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(clean_test_case_path).readlines()
num_lines = len(test_cases)
for tc in test_cases:
loop_count += 1
if valid_answer:
args = [clean_ref_code_path] + \
[x for x in tc.split()]
ret = self._run_command(args,
stdin=None,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE
)
proc, inst_stdout, inst_stderr = ret
if self.file_paths:
self.files = copy_files(self.file_paths)
args = [self.submit_code_path] + \
[x for x in tc.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):
mark_fraction = float(self.weight) if self.partial_grading else 0.0
return True, "Correct answer", mark_fraction
else:
err = ("Error:expected"
" {0}, got {1}").format(inst_stdout+inst_stderr,
stdnt_stdout+stdnt_stderr
)
return False, err, 0.0
|
