1. 作用
单元测试是用来对一个模块、一个函数或者一个类来进行正确性检验的测试工作。
2. 操作
import unittest
class Student(object):
def __init__(self, name, score):
self.name = name
self.score = score
def get_grade(self):
if self.score >100 and self.score < 0:
raise ValueError
elif self.score >= 80:
return 'A'
elif self.score >= 60:
return 'A'
return 'C'
class TestStudent(unittest.TestCase):
def test_80_to_100(self):
s1 = Student('Bart', 80)
s2 = Student('Lisa', 100)
self.assertEqual(s1.get_grade(), 'A')
self.assertEqual(s2.get_grade(), 'A')
def test_60_to_80(self):
s1 = Student('Bart', 60)
s2 = Student('Lisa', 79)
self.assertEqual(s1.get_grade(), 'B')
self.assertEqual(s2.get_grade(), 'B')
def test_0_to_60(self):
s1 = Student('Bart', 0)
s2 = Student('Lisa', 50)
self.assertEqual(s1.get_grade(), 'C')
self.assertEqual(s2.get_grade(), 'C')
def test_invalid(self):
s1 = Student('Bart', -1)
s2 = Student('Lisa', 101)
with self.assertRaises(ValueError):
s1.get_grade()
with self.assertRaises(ValueError):
s2.get_grade()
if __name__ == '__main__':
unittest.main()
