def test_file_reader(self) -> None:
"""
This function has test cases for file_reader()
"""
expect = [['123', 'Jin He', 'Computer Science'],
['234', 'Nanda Koka', 'Software Engineering'],
['345', 'Benji Cai', 'Software Engineering']]
self.assertEqual(list(file_reader('./student_majors.txt',
3, '|', True)), expect)
self.assertNotEqual(list(file_reader(
'./student_majors.txt', 3, '|')), expect)
with self.assertRaises(ValueError):
list(file_reader('student_majors.txt', 4, '|', True))
with self.assertRaises(FileNotFoundError):
list(file_reader('xyz.txt', 3, '|', True))
def _read_instructor(self) -> None:
"""
Read instructor file from path construct object
"""
try:
path: str = os.path.join(self._path,"instructors.txt")
for cwid, name, dept in file_reader(path=path, fields=3, sep='|', header=True):
self._instructors[cwid] = Instructor(cwid, dept, name)
except FileNotFoundError:
print(f"Can not open file at {self._path}")
except ValueError:
print(" Some fields are missing in 3")
def _read_students(self) -> None:
"""
Read students file from path construct object
"""
try:
path: str = os.path.join(self._path,"students.txt")
for cwid, name, major in file_reader(path=path, fields=3, sep=';', header=True):
required: List[str] = self._majors[major].get_required()
electives: List[str] = self._majors[major].get_elective()
self._students[cwid] = Student(cwid,name, major, required, electives)
except FileNotFoundError:
print(f"Can not open file at {self._path}")
except ValueError:
print(" Some fields are missing in 2 ")
def _read_majors(self) -> None:
"""
Read majors file from path construct object
"""
try:
path: str = os.path.join(self._path,"majors.txt")
for major, required, course in file_reader(path=path, fields=3, sep='\t', header=True):
if major not in self._majors:
self._majors[major] = Major(major)
self._majors[major].add_course(required=required, course=course)
except FileNotFoundError:
print(f"Can not open file at {self._path}")
except ValueError:
print(" Some fields are missing in 1")
def _read_grades(self) -> None:
"""Read grade file from path construct object"""
try:
path: str = os.path.join(self._path,"grades.txt")
for stu_cwid, course, grade, inst_cwid in file_reader(path=path, fields=4, sep='|', header=True):
if stu_cwid in self._students:
s: Student = self._students[stu_cwid]
s.course_add(course=course, grade=grade)
else:
raise ValueError("No Student with such id")
if inst_cwid in self._instructors:
p: Instructor = self._instructors[inst_cwid]
p.inst_add_course(course)
else:
raise ValueError("No Professor with that ID")
except FileNotFoundError:
print(f"Can not open file at {self._path}")
except ValueError:
print(" Some fields are missing in 4")