pytest单侧模块_入门汇总
Pytest簡(jiǎn)單介紹
(pytest是python的一個(gè)測(cè)試框架,主要是用來(lái)進(jìn)行一些小的測(cè)試)
- 安裝:pip install -U pytest
- 查看是否安裝成功:pytest --version
- 運(yùn)行:在當(dāng)前文件所在目錄下執(zhí)行pytest,會(huì)尋找當(dāng)前目錄以及子目錄下以test開頭的py文件或者以test結(jié)尾的py文件,找到文件后,在文件中找到以test開頭函數(shù)并執(zhí)行。(或者執(zhí)行pytest 文件名--這樣可以指定某個(gè)文件進(jìn)行pytest的測(cè)試? 或者? python -m pytest xxx.py)
在執(zhí)行pytest xxx.py時(shí),若增加參數(shù):pytest -v -s xxx.py? ?(-v:顯示運(yùn)行的函數(shù);-s:顯示內(nèi)部的打印信息)
- 編寫pytest測(cè)試樣例的規(guī)則:
- 測(cè)試文件以test_開頭
- 測(cè)試類以Test開頭,并且不能帶有init方法
- 測(cè)試函數(shù)以test_開頭
- 斷言使用基本的assert即可
- 斷言--正常:
- 斷言--異常(pytest.raise方法):
- 在test前,可以通過(guò)增加skip或xfail進(jìn)行跳過(guò)(失敗)測(cè)試案例
- 簡(jiǎn)單例子:
結(jié)果:
(venvX) F:\test_jiaxin>pytest test_para1.py ============================= test session starts ============================= platform win32 -- Python 2.7.9, pytest-3.7.1, py-1.5.3, pluggy-0.7.1 rootdir: F:\test_jiaxin, inifile: plugins: allure-adaptor-1.7.10 collected 1 item test_para1.py . [100%]========================== 1 passed in 0.09 seconds ===========================pytest之feature-scope
- function:每個(gè)test都運(yùn)行,默認(rèn)是function的scope.
- class:每個(gè)class的所有test只運(yùn)行一次.
- module:每個(gè)module的所有test只運(yùn)行一次.
- session:每個(gè)session只運(yùn)行一次.
比如你的所有test都需要連接同一個(gè)數(shù)據(jù)庫(kù),那可以設(shè)置為module,只需要連接一次數(shù)據(jù)庫(kù),對(duì)于module內(nèi)的所有test,這樣可以極大的提高運(yùn)行效率。
代碼:
1 @pytest.fixture(scope="module") 2 def hero_backup_policy(self, acmp_cfg): 3 return AcloudBackupPolicy(acmp_cfg) 4 5 @pytest.fixture(scope="function") 6 def hero_acloud_backup_policy(self, acmp_cfg): 7 return Server(acmp_cfg)pytest的參數(shù)化方式
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pytest.fixture()方式進(jìn)行參數(shù)化,fixture裝飾的函數(shù)可以作為參數(shù)傳入其他函數(shù)
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conftest.py 文件中存放參數(shù)化函數(shù),可作用于模塊內(nèi)的所有測(cè)試用例
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pytest.mark.parametrize()方式進(jìn)行參數(shù)化
?
待測(cè)試代碼片段:(is_leap_year.py)
1 # coding:utf-8 2 def is_leap_year(year): 3 # 先判斷year是不是整型 4 if isinstance(year, int) is not True: 5 raise TypeError("傳入的參數(shù)不是整數(shù)") 6 elif year == 0: 7 raise ValueError("公元元年是從公元一年開始!!") 8 elif abs(year) != year: 9 raise ValueError("傳入的參數(shù)不是正整數(shù)") 10 elif (year % 4 == 0 and year % 100 != 0) or year % 400 == 0: 11 print"%d年是閏年" % year 12 return True 13 else: 14 print"%d年不是閏年" % year 15 return False-
pytest.fixture()
pytest.fixture()中傳入的參數(shù)為list,用例執(zhí)行時(shí),遍歷list中的值,每傳入一次值,則相當(dāng)于執(zhí)行一次用例。
@pytest.fixture()裝飾的函數(shù)中,傳入了一個(gè)參數(shù)為request。
這里的測(cè)試數(shù)據(jù)是直接存在list中的,能否存入json文件或者xml文件再進(jìn)行讀取轉(zhuǎn)換為list呢?
代碼:
1 # coding:utf-8 2 import is_leap_year 3 import pytest 4 5 class TestPara(): 6 is_leap = [4, 40, 400, 800, 1996, 2996] 7 is_not_leap = [1, 100, 500, 1000, 1999, 3000] 8 is_valueerror = [0, -4, -100, -400, -1996, -2000] 9 is_typeerror = ['-4', '4', '100', 'ins', '**', '中文'] 10 11 @pytest.fixture(params=is_leap) 12 def is_leap(self, request): 13 return request.param 14 15 @pytest.fixture(params=is_typeerror) 16 def is_typeerror(self, request): 17 return request.param 18 19 def test_is_leap(self, is_leap): 20 assert is_leap_year.is_leap_year(is_leap) == True 21 22 def test_is_typeerror(self, is_typeerror): 23 with pytest.raises(TypeError): 24 is_leap_year.is_leap_year(is_typeerror)-
conftest.py 文件 -- 測(cè)試數(shù)據(jù)與用例分離
代碼:
conftest.py文件1 # coding:utf-8 2 import pytest 3 4 is_leap = [4, 40, 400, 800, 1996, 2996] 5 is_not_leap = [1, 100, 500, 1000, 1999, 3000] 6 is_valueerror = [0, -4, -100, -400, -1996, -2000] 7 is_typeerror = ['-4', '4', '100', 'ins', '**', '中文'] 8 9 @pytest.fixture(params=is_leap) 10 def is_leap(request): 11 return request.param 12 13 @pytest.fixture(params=is_typeerror) 14 def is_typeerror(request): 15 return request.param test_para.py文件
1 # coding:utf-8 2 3 import is_leap_year 4 import pytest 5 6 class TestPara(): 7 def test_is_leap(self, is_leap): 8 assert is_leap_year.is_leap_year(is_leap) == True 9 10 def test_is_typeerror(self, is_typeerror): 11 with pytest.raises(TypeError): 12 is_leap_year.is_leap_year(is_typeerror)
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pytest.mark.parametrize() -- 進(jìn)行參數(shù)化
代碼:
1 # coding:utf-8 2 import is_leap_year 3 import pytest 4 5 class TestPara(): 6 # 參數(shù)傳入year中 7 @pytest.mark.parametrize('year, expected', [(1, False), (4,True), (100, False), (400, True), (500, True)]) 8 def test_is_leap(self, year, expected): 9 assert is_leap_year.is_leap_year(year) == expected 10 11 @pytest.mark.parametrize('year, expected', [(0, ValueError),('-4', TypeError), (-4, ValueError), ('ss', TypeError), (100.0, ValueError)]) 12 def test_is_typeerror(self, year, expected): 13 if expected == ValueError: 14 with pytest.raises(ValueError) as excinfo: 15 is_leap_year.is_leap_year(year) 16 assert excinfo.type == expected 17 else: 18 with pytest.raises(TypeError) as excinfo: 19 is_leap_year.is_leap_year(year) 20 assert excinfo.type == expected參考鏈接:https://blog.csdn.net/zhusongziye/article/details/79902772
?
pytest-fixture擴(kuò)展內(nèi)容
1.??把一個(gè)函數(shù)定義為Fixture很簡(jiǎn)單,只能在函數(shù)聲明之前加上“@pytest.fixture”。其他函數(shù)要來(lái)調(diào)用這個(gè)Fixture,只用把它當(dāng)做一個(gè)輸入的參數(shù)即可。
1 import pytest 2 3 @pytest.fixture() 4 def before(): 5 print '\nbefore each test' 6 7 def test_1(before): 8 print 'test_1()' 9 10 def test_2(before): 11 print 'test_2()'result:
(venvX) F:\test_jiaxin>pytest -v -s test_compute.py ============================= test session starts ============================= platform win32 -- Python 2.7.9, pytest-3.7.1, py-1.5.3, pluggy-0.7.1 -- f:\projects\sandom\venvx\scripts\python.exe cachedir: .pytest_cache rootdir: F:\test_jiaxin, inifile: plugins: allure-adaptor-1.7.10 collected 2 items test_compute.py::test_1 before each test test_1() PASSED test_compute.py::test_2 before each test test_2() PASSED========================== 2 passed in 0.17 seconds ===========================?
2.? 進(jìn)行封裝
1 import pytest 2 3 @pytest.fixture() 4 def before(): 5 print '\nbefore each test' 6 7 # 每個(gè)函數(shù)前聲明 8 @pytest.mark.usefixtures("before") 9 def test_1(): 10 print 'test_1()' 11 @pytest.mark.usefixtures("before") 12 def test_2(): 13 print 'test_2()' 14 15 #封裝在類里,類里的每個(gè)成員函數(shù)聲明 16 class Test1: 17 @pytest.mark.usefixtures("before") 18 def test_3(self): 19 print 'test_1()' 20 @pytest.mark.usefixtures("before") 21 def test_4(self): 22 print 'test_2()' 23 24 #封裝在類里在前聲明 25 @pytest.mark.usefixtures("before") 26 class Test2: 27 def test_5(self): 28 print 'test_1()' 29 def test_6(self): 30 print 'test_2()'result:
(venvX) F:\test_jiaxin>pytest -v -s test_compute.py ============================= test session starts ============================= platform win32 -- Python 2.7.9, pytest-3.7.1, py-1.5.3, pluggy-0.7.1 -- f:\projects\sandom\venvx\scripts\python.exe cachedir: .pytest_cache rootdir: F:\test_jiaxin, inifile: plugins: allure-adaptor-1.7.10 collected 6 items test_compute.py::test_1 before each test test_1() PASSED test_compute.py::test_2 before each test test_2() PASSED test_compute.py::Test1::test_3 before each test test_1() PASSED test_compute.py::Test1::test_4 before each test test_2() PASSED test_compute.py::Test2::test_5 before each test test_1() PASSED test_compute.py::Test2::test_6 before each test test_2() PASSED========================== 6 passed in 0.11 seconds ===========================?
3.??fixture還可以帶參數(shù),可以把參數(shù)賦值給params,默認(rèn)是None。對(duì)于param里面的每個(gè)值,fixture都會(huì)去調(diào)用執(zhí)行一次,就像執(zhí)行for循環(huán)一樣把params里的值遍歷一次。
1 import pytest 2 3 @pytest.fixture(params=[1, 2, 3]) 4 def test_data(request): 5 return request.param 6 7 def test_not_2(test_data): 8 print('test_data: %s' % test_data) 9 assert test_data != 2result:
(venvX) F:\test_jiaxin>pytest -v -s test_compute.py ============================= test session starts ============================= platform win32 -- Python 2.7.9, pytest-3.7.1, py-1.5.3, pluggy-0.7.1 -- f:\projects\sandom\venvx\scripts\python.exe cachedir: .pytest_cache rootdir: F:\test_jiaxin, inifile: plugins: allure-adaptor-1.7.10 collected 3 items test_compute.py::test_not_2[1] test_data: 1 PASSED test_compute.py::test_not_2[2] test_data: 2 FAILED test_compute.py::test_not_2[3] test_data: 3 PASSED================================== FAILURES =================================== ________________________________ test_not_2[2] ________________________________test_data = 2def test_not_2(test_data):print('test_data: %s' % test_data) > assert test_data != 2 E assert 2 != 2test_compute.py:64: AssertionError ===================== 1 failed, 2 passed in 0.12 seconds ======================?
轉(zhuǎn)載于:https://www.cnblogs.com/sunshine-blog/p/9468399.html
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