assertb%2==0,'valueisodd,should be even' E AssertionError: value is odd,should be even E assert (11 % 2) == 0 test_one.py:88: AssertionError ''' def myfunc(): raise ValueError('Exception 123 raised') def test_raise7(): with pytest.raises(ValueError,match=r'.* 8888 .*'): m...
importpytestdeffunc():raiseValueError("Exception 123 raised")deftest_match():# pytest.raises()函数,# 可以用元组的形式传递参数,只需要触发其中任意一个即可。# 通过match可以设置通过正则表达式匹配异常。withpytest.raises((ValueError, RuntimeError), match=r'.* 123 .*')asexcinfo:func()assert“123”...
import pytestdef test_match(): with pytest.raises(ValueError) as exc_info: raise ValueError("Exception 123 raised") assert '123' in str(exc_info.value) 解释: exc_info 是 ExceptionInfo 类的一个实例对象,它封装了异常的信息;常用的属性包括: type 、 value 和 traceback ; 【注意】在上下文管理...
当使用 python testAssert.py 运行时,内置属性 __debug__ 会输出 True,assert 1 > 2 语句会抛出 AssertionError 异常。 当使用 python -O testAssert.py 运行时,内置属性 __debug__ 会输出 False,assert 1 > 2 语句由于没有执行不会报任何异常。 assert关键字语法 ①assert关键字语法格式如下: assert exp...
When an assert statement is being encountered, Python evaluates the accompanying expression, which is hopefully true. If the expression is false, then an AssertionError exception is raised by Python. 当遇到断言语句时,Python会评估附带的表达式,希望它是正确的。 如果表达式为假,则Python会引发AssertionErro...
(wda_python)bash-3.2$ pytest-q test_assert.py.[100%]1passedin0.03seconds(wda_python)bash-3.2$ 如果不匹配就会报错: importpytestdeffunc():raiseSystemError("Exception 124 raised")deftest_func():withpytest.raises(SystemError,match=r'.* 123 .*'):func() ...
In this test, we use the pytest.raises() context manager to wrap the code that might raise an exception. If the exception is raised, it is caught by pytest.raises() and stored in the exc_info variable. We then use the assert statement to check if the raised exception contains the expe...
Hi, Pytest converts AssertionError's args to strings when using assert but not when the exception is raised. For example, in native Python I can do the following: try: assert 0, 123 except Exception as error: error_arg = error.args[0] pr...
一、直接使用python中的assert断言语句 (1)pytest 中可以直接使用python的assert断言语句进行断言 如: # content of test_assert1.pydeff():return3deftest_function():assertf() ==4 执行结果如下: $ pytest test_assert1.py ===testsession starts === platform linux -- Python 3.x.y, pytest-7.x....
使用assert语句进行断言 pytest允许你使用标准的Pythonassert断言语句来验证测试中的期望结果和实际结果。 例如,你可以编写以下内容: # test_assert1.py文件内容 def f(): return 3 def test_function(): assert f() == 4 来断言你的函数返回一个特定的值。 如果此断言失败,你将看到函数调用的返回值: ...