Pytest篇1

原文档链接：Get Started - pytest documentation

1.pytest安装与基本使用

要求：Python 3.8+

1.安装pip install pytest

2.创建一个python文件命名test_sample.py或者sample_test.py(test_开头的文件或者_test结尾的文件pytest默认都会执行)

# content of test_sample.py
def func(x):
    return x + 1


def test_answer():
    assert func(3) == 5

执行结果：

============================= test session starts =============================
collecting ... collected 1 item

test_sample.py::test_answer FAILED                                       [100%]
test_sample.py:5 (test_answer)
4 != 5

预期:5
实际:4
<点击以查看差异>

def test_answer():
>       assert func(3) == 5
E       assert 4 == 5
E        +  where 4 = func(3)

test_sample.py:7: AssertionError

============================== 1 failed in 0.15s ==============================

3.方法以test_开头或者_test结尾的也能自动执行(但是如果是项目执行的话会跳过不是test_开头或者_test结尾的文件，这个要注意，同样，在类中也会跳过不是test_开头和_test结尾的方法)

def test_one():
    x = "this"
    assert "h" in x

def test_two():
    x = "hello"
    assert hasattr(x, "check")

执行结果：

============================= test session starts =============================
collecting ... collected 2 items

ptest.py::test_one PASSED                                                [ 50%]
ptest.py::test_two FAILED                                                [100%]
ptest.py:16 (test_two)
def test_two():
        x = "hello"
>       assert hasattr(x, "check")
E       AssertionError: assert False
E        +  where False = hasattr('hello', 'check')

ptest.py:19: AssertionError

========================= 1 failed, 1 passed in 0.16s =========================