pytest---参数化

import pytest

@pytest.mark.parametrize('test_input,expected',[('3+5',8),
                         ('2-1',1),('7*5',30)])
def test_eval(test_input,expected):
    assert eval(test_input)==expected　　　　----eval把字符串转换成表达式

est_param.py::test_eval[2-1-1]
test_param.py::test_eval[7*5-30] PASSED [ 33%]PASSED [ 66%]FAILED [100%]
test_param.py:3 (test_eval[7*5-30])
35 != 30

Expected :30
Actual :35
<Click to see difference>

test_input = '7*5', expected = 30

@pytest.mark.parametrize('test_input,expected',[('3+5',8),
('2-1',1),('7*5',30)])
def test_eval(test_input,expected):
> assert eval(test_input)==expected
E assert 35 == 30　　　　　　　　　　----提示把30改成35

test_param.py:7: AssertionError

Assertion failed