Python – 单元测试中的 assertGreater()函数
Python中的assertGreater()是一个unittest库函数，用于单元测试以检查第一个给定值是否大于第二个值。该函数将采用三个参数作为输入，并根据断言条件返回一个布尔值。
此函数检查第一个给定值是否大于第二个值，如果是，则返回 true，如果第一个值不大于第二个值，则返回 false。
Syntax: assertGreater(first, second, message=None)
Parameters: assertGreater() accept three parameters which are listed below with explanation:
- first: first input value (integer)
- second: second input value (integer)
- message: a string sentence as a message which got displayed when the test case got failed.
下面列出了一个示例，说明了给定断言函数的正面和负面测试用例：
示例 1：
Python3
# test suite
import unittest
class TestStringMethods(unittest.TestCase):
# negative test function to test if values1
# is greater than value2
def test_negativeForGreater(self):
first = 4
second = 5
# error message in case if test case got failed
message = "first value is not greater that second value."
# assert function() to check if values1 is
# greater than value2
self.assertGreater(first, second, message)
if __name__ == '__main__':
unittest.main()Python
# test suite
import unittest
class TestStringMethods(unittest.TestCase):
# positive test function to test if values
# are almost equal with place
def test_positiveForGreater(self):
first = 4
second = 3
# error message in case if test case got failed
message = "first value is not greater that second value."
# assert function() to check if values1 is
# greater than value2
self.assertGreater(first, second, message)
if __name__ == '__main__':
unittest.main()输出：
F
======================================================================
FAIL: test_negativeForGreater (__main__.TestStringMethods)
———————————————————————-
Traceback (most recent call last):
File “p1.py”, line 13, in test_negativeForGreater
self.assertGreater(first, second, message)
AssertionError: 4 not greater than 5 : first value is not greater that second value.
———————————————————————-
Ran 1 test in 0.000s
FAILED (failures=1)
示例 2：
Python
# test suite
import unittest
class TestStringMethods(unittest.TestCase):
# positive test function to test if values
# are almost equal with place
def test_positiveForGreater(self):
first = 4
second = 3
# error message in case if test case got failed
message = "first value is not greater that second value."
# assert function() to check if values1 is
# greater than value2
self.assertGreater(first, second, message)
if __name__ == '__main__':
unittest.main()
输出：
.
———————————————————————-
Ran 1 test in 0.000s
OK