def test_sort_letter(self):
"""
Test sorting letter grades
"""
s, c = create_offering()
a = LetterActivity(name="Assignment 1", short_name="A1", status="RLS", offering=c, position=2, due_date=None, group=False)
a.save()
ms = []
for i in range(10):
p = Person.objects.get(userid="0aaa%i"%i)
m = Member(person=p, offering=c, role="STUD", added_reason="UNK")
m.save()
ms.append(m)
g = LetterGrade(activity=a, member=ms[0], letter_grade="B+", flag="GRAD")
g.save(entered_by='ggbaker')
g = LetterGrade(activity=a, member=ms[1], letter_grade="A", flag="GRAD")
g.save(entered_by='ggbaker')
g = LetterGrade(activity=a, member=ms[2], letter_grade="D", flag="GRAD")
g.save(entered_by='ggbaker')
g = LetterGrade(activity=a, member=ms[3], letter_grade="B-", flag="GRAD")
g.save(entered_by='ggbaker')
g = LetterGrade(activity=a, member=ms[4], letter_grade="P", flag="GRAD")
g.save(entered_by='ggbaker')
g = LetterGrade(activity=a, member=ms[5], letter_grade="GN", flag="GRAD")
g.save(entered_by='ggbaker')
g = LetterGrade(activity=a, member=ms[6], letter_grade="F", flag="GRAD")
g.save(entered_by='ggbaker')
g = LetterGrade(activity=a, member=ms[7], letter_grade="DE", flag="GRAD")
g.save(entered_by='ggbaker')
g = LetterGrade(activity=a, member=ms[8], letter_grade="C-", flag="GRAD")
g.save(entered_by='ggbaker')
g = LetterGrade(activity=a, member=ms[9], letter_grade="N", flag="GRAD")
g.save(entered_by='ggbaker')
g_objs = LetterGrade.objects.filter(activity=a)
gs = [g.letter_grade for g in g_objs]
gs_sort = sorted_letters(gs)
self.assertEquals(gs_sort, ['A', 'B+', 'B-', 'C-', 'D', 'P', 'F', 'DE', 'N', 'GN'])
# pre-sort by userid for median testing (so we know which subsets we're grabbing)
gs = [(int(g.member.person.userid[4:]), g.letter_grade) for g in g_objs]
gs.sort()
gs = [g for u,g in gs]
# odd-length case
self.assertEquals(median_letters(sorted_letters(gs[0:5])), "B-")
# even length with median at boundary
self.assertEquals(median_letters(sorted_letters(gs[0:6])), "B-/D")
# empty list
self.assertEquals(median_letters([]), u"\u2014")
def test_sort_letter(self):
"""
Test sorting letter grades
"""
s, c = create_offering()
a = LetterActivity(name="Assignment 1", short_name="A1", status="RLS", offering=c, position=2, due_date=None, group=False)
a.save()
ms = []
for i in range(10):
p = Person.objects.get(userid="0aaa%i"%i)
m = Member(person=p, offering=c, role="STUD", added_reason="UNK")
m.save()
ms.append(m)
g = LetterGrade(activity=a, member=ms[0], letter_grade="B+", flag="GRAD")
g.save(entered_by='ggbaker')
g = LetterGrade(activity=a, member=ms[1], letter_grade="A", flag="GRAD")
g.save(entered_by='ggbaker')
g = LetterGrade(activity=a, member=ms[2], letter_grade="D", flag="GRAD")
g.save(entered_by='ggbaker')
g = LetterGrade(activity=a, member=ms[3], letter_grade="B-", flag="GRAD")
g.save(entered_by='ggbaker')
g = LetterGrade(activity=a, member=ms[4], letter_grade="P", flag="GRAD")
g.save(entered_by='ggbaker')
g = LetterGrade(activity=a, member=ms[5], letter_grade="GN", flag="GRAD")
g.save(entered_by='ggbaker')
g = LetterGrade(activity=a, member=ms[6], letter_grade="F", flag="GRAD")
g.save(entered_by='ggbaker')
g = LetterGrade(activity=a, member=ms[7], letter_grade="DE", flag="GRAD")
g.save(entered_by='ggbaker')
g = LetterGrade(activity=a, member=ms[8], letter_grade="C-", flag="GRAD")
g.save(entered_by='ggbaker')
g = LetterGrade(activity=a, member=ms[9], letter_grade="N", flag="GRAD")
g.save(entered_by='ggbaker')
g_objs = LetterGrade.objects.filter(activity=a)
gs = [g.letter_grade for g in g_objs]
gs_sort = sorted_letters(gs)
self.assertEqual(gs_sort, ['A', 'B+', 'B-', 'C-', 'D', 'P', 'F', 'DE', 'N', 'GN'])
# pre-sort by userid for median testing (so we know which subsets we're grabbing)
gs = [(int(g.member.person.userid[4:]), g.letter_grade) for g in g_objs]
gs.sort()
gs = [g for u,g in gs]
# odd-length case
self.assertEqual(median_letters(sorted_letters(gs[0:5])), "B-")
# even length with median at boundary
self.assertEqual(median_letters(sorted_letters(gs[0:6])), "B-/D")
# empty list
self.assertEqual(median_letters([]), "\u2014")
def generate_letter_activity_stat(activity, role):
"""
This function fetch statistics of the numeric activity.
"""
if role == 'STUD' and activity.status != 'RLS':
return None, 'Summary statistics disabled for unreleased activities.'
student_grade_list = fetch_students_letter_grade(activity)
sorted_grades = sorted_letters(student_grade_list)
if not sorted_grades:
if role == 'STUD':
return None, 'Summary statistics disabled for small classes.'
else:
return None, 'No grades assigned.'
if role == 'STUD' and not activity.showstats():
return None, 'Summary stats disabled by instructor.'
student_grade_list_count = len(student_grade_list)
if role == 'STUD' and not activity.showhisto():
grade_range_stat_list = []
else:
grade_range_stat_list = generate_grade_range_stat_lettergrade(student_grade_list)
median=median_letters(sorted_grades)
max=max_letters(sorted_grades)
min=min_letters(sorted_grades)
stats = ActivityStatlettergrade(grade_range_stat_list, student_grade_list_count,median,min,max)
reason_msg = ''
if role == 'STUD' and (stats is None or stats.count < STUD_NUM_TO_DISP_ACTSTAT):
reason_msg = 'Summary statistics disabled for small classes.'
stats = None
return stats, reason_msg
def generate_letter_activity_stat(activity, role):
"""
This function fetch statistics of the numeric activity.
"""
if role == 'STUD' and activity.status != 'RLS':
return None, 'Summary statistics disabled for unreleased activities.'
student_grade_list = fetch_students_letter_grade(activity)
sorted_grades = sorted_letters(student_grade_list)
if not sorted_grades:
if role == 'STUD':
return None, 'Summary statistics disabled for small classes.'
else:
return None, 'No grades assigned.'
if role == 'STUD' and not activity.showstats():
return None, 'Summary stats disabled by instructor.'
student_grade_list_count = len(student_grade_list)
if role == 'STUD' and not activity.showhisto():
grade_range_stat_list = []
else:
grade_range_stat_list = generate_grade_range_stat_lettergrade(
student_grade_list)
median = median_letters(sorted_grades)
max = max_letters(sorted_grades)
min = min_letters(sorted_grades)
stats = ActivityStatlettergrade(grade_range_stat_list,
student_grade_list_count, median, min, max)
reason_msg = ''
if role == 'STUD' and (stats is None
or stats.count < STUD_NUM_TO_DISP_ACTSTAT):
reason_msg = 'Summary statistics disabled for small classes.'
stats = None
return stats, reason_msg
