Python unittest assertLessEqual()用法及代碼示例

Python中的assertLessEqual()是單元測試庫函數，用於單元測試中以檢查第一個給定值是否小於或等於第二個值。此函數將使用三個參數作為輸入，並根據斷言條件返回布爾值。

此函數檢查第一個給定值是否小於或等於第二個值，如果是，則返回true，否則，如果第一個值不小於或等於第二個值，則返回false。

用法:assertLessEqual(first, second, message=None)

參數：assertLessEqual()接受以下三個參數的說明：

first：第一個輸入值(整數)
second：第二個輸入值(整數)
message：作為測試消息失敗時顯示的消息的字符串語句。

下麵列出的示例說明給定的assert函數的正負測試用例：

範例1：

Python3

# test suite 
import unittest 
  
class TestStringMethods(unittest.TestCase):
    
    # negative test function to test if values1 is less or equal than value2 
    def test_negativeForLessEqual(self):
        first = 6
        second = 5
          
        # error message in case if test case got failed 
        message = "first value is not less than or equal to second value."
          
        # assert function() to check if values1 is less or equal than value2 
        self.assertLessEqual(first, second, message) 
  
if __name__ == '__main__':
    unittest.main()

輸出：

F
======================================================================
FAIL:test_negativeForLessEqual (__main__.TestStringMethods)
———————————————————————-
Traceback (most recent call last):
File “p1.py”, line 13, in test_negativeForLessEqual
self.assertLessEqual(first, second, message)
AssertionError:6 not less than or equal to 5:first value is not less than or equal to second value.

———————————————————————-
Ran 1 test in 0.000s

FAILED (failures=1)

範例2：

Python

# test suite 
import unittest 
  
class TestStringMethods(unittest.TestCase):
    
    # positive test function to test if value1 is less or equal than value2 
    def test_positiveForLessEqual(self):
        first = 4
        second = 4
          
        # error message in case if  test case got failed 
        message = "first value is not less than or equal to second value."
          
        # assert function() to check if values1 is less or equal than value2 
        self.assertLessEqual(first, second, message) 
  
  
if __name__ == '__main__':
    unittest.main()

輸出：

.
———————————————————————-
Ran 1 test in 0.000s

OK

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注：本文由純淨天空篩選整理自Shivam.Pradhan大神的英文原創作品 Python – assertLessEqual() function in unittest。非經特殊聲明，原始代碼版權歸原作者所有，本譯文未經允許或授權，請勿轉載或複製。