py.test 测试,mock

pytest使用方法

# 指定测试文件
py.test -v test_functions.py


# 指定测试目录
py.test -v .

代码示例

'''
# 目录结构
test
  .
  ├── __init__.py
  ├── functions.py   # 方法文件
  ├── test_app.py    # 测试文件
  └── test_functions.py   # 测试文件
'''


# functions.py

def multiple(x,y ):
    return x*y +10


def add_and_multiply(x,y ):
    addition=x+y
    multi=multiple(x,y)

    return (addition, multi)

# ------------------------

# test_functions.py

def test_add_and_multiply():
    x,y=3,5

    addi, multi=add_and_multiply(x,y )

    assert addi==8
    assert multi==15



# 要mock的方法要写全路径
@mock.patch('test.functions.multiple', return_value=15 )
def test_add_and_multiply_mock(mock_func):
    x = 3
    y = 5
    # 要mock的方法需指定绝对路径
    # test.functions.multiple=mock.Mock(return_value=15)
    addi, multi= add_and_multiply(x, y)
    print()
    assert addi == 8
    assert multi == 15



def test_add_and_multiply_mock2():
    x = 3
    y = 5
    # 要mock的方法需指定绝对路径
    test.functions.multiple=mock.Mock(return_value=15)
    addi, multi= add_and_multiply(x, y)
    print()
    assert addi == 8
    assert multi == 15

测试

'''bash

指定测试文件

py.test -v test_functions.py

指定测试目录

py.test -v .

py.test -v test_functions.py
collected 3 items

test_functions.py::test_add_and_multiply FAILED [ 33%]
test_functions.py::test_add_and_multiply_mock PASSED [ 66%]
test_functions.py::test_add_and_multiply_mock2 PASSED [100%]

=============== FAILURES ============
___________test_add_and_multiply _____

def test_add_and_multiply():
    x,y=3,5

    addi, multi=add_and_multiply(x,y )

    assert addi==8

  assert multi==15

E assert 25 == 15
E -25
E +15

test_functions.py:21: AssertionError
=============== 1 failed, 2 passed in 0.14s ===========