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Add mark.parametrize and parameterized tests into test_marks.py
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‎test_docs/conftest.py‎

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# content of conftest.py
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import pytest
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from pytest import fixture
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def pytest_configure(config):
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config.addinivalue_line(
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"markers", "marker_name : marker test written into conftest.py for a better understanding"
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)
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config.addinivalue_line(
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"markers", "marker_name1 : marker test written into conftest.py for a better understanding"
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)
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config.addinivalue_line(
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"markers", "marker_name2 : marker test written into conftest.py for a better understanding"
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)
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config.addinivalue_line(
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"markers", "marker_name3 : marker test written into conftest.py for a better understanding"
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)
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@fixture(scope='session')
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def I_handle_DB_URL_FILE_in_class():
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print(" --> connect to DB/URL/FILE in class", end=' ')
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yield
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print(" --> disconnect from DB/URL/FILE in class", end=' ')
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‎test_docs/pytest.ini‎

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# considers unittest.TestCase inherited classes by these parameters by default in pytest
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# python_files = *_test.py
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# python_classes = *_Tests
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# python_functions = test test_*
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[pytest]
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python_files=test_*.py
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python_classes=*_tests
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python_functions=test test_*
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markers=marker_name : marker test written into pytest.ini for a better understanding
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marker_name1 : marker test written into pytest.ini for a better understanding
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marker_name2 : marker test written into pytest.ini for a better understanding
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marker_name3 : marker test written into pytest.ini for a better understanding

‎test_docs/sample_pytest.ini‎

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‎test_docs/test_fictures.py‎

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import time
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import unittest
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import webbrowser
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import pytest
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from pytest import fixture, mark
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'''
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This can be used when resources need to be set up before the test cases and clean once done, like
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- Connect to a DB before
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- Launch a URL
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- Open a file to read/write
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'''
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# The function identified by fixture can be added in arg of specific methods/functions
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# and will be called before and after these specific method/function
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# yield means that the code following will be run on the second call
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# the option -s must be used with pytest to have the details of strings
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#
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# @fixture()
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# def I_handle_DB_URL_FILE():
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# print(" --> connect to DB/URL/FILE", end=' ')
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# yield
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# print(" --> disconnect from DB/URL/FILE", end=' ')
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#
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# def test_function_01(I_handle_DB_URL_FILE):
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# print(" --> test_function_01", end=' ')
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# assert True
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#
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# def test_function_02(I_handle_DB_URL_FILE):
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# print(" --> test_function_02", end=' ')
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# assert True
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#
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# def test_function_03():
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# print(" --> test_function_03", end=' ')
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# assert True
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#
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#
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''' pytest -v -k test_fictures.py -s
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test_fictures.py::test_function_01 --> connect to DB/URL/FILE --> test_function_01 PASSED --> disconnect from DB/URL/FILE
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test_fictures.py::test_function_02 --> connect to DB/URL/FILE --> test_function_02 PASSED --> disconnect from DB/URL/FILE
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test_fictures.py::test_function_03 --> test_function_03 PASSED
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'''
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# # But usually DB must be opened once, be used by different tests and be closed, and may need a scope to be defined
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# # The fixtures are created when first requested by a test, and are destroyed based on their scope:
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# # function: the default scope, the fixture is destroyed at the end of the test.
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# # class: the fixture is destroyed during teardown of the last test in the class.
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# # module: the fixture is destroyed during teardown of the last test in the module.
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# # package: the fixture is destroyed during teardown of the last test in the package.
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# # session: the fixture is destroyed at the end of the test session.
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# # Src : https://docs.pytest.org/en/6.2.x/fixture.html#fixture-scopes
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#
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# @fixture(scope="module")
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# def I_handle_DB_URL_FILE_V2():
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# print(" --> connect to DB/URL/FILE V2", end=' ')
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# yield
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# print(" --> disconnect from DB/URL/FILE V2", end=' ')
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#
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# def test_function_04(I_handle_DB_URL_FILE_V2):
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# print(" --> test_function_04", end=' ')
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# assert True
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#
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# def test_function_05(I_handle_DB_URL_FILE_V2):
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# print(" --> test_function_05", end=' ')
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# assert True
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#
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# def test_function_06():
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# print(" --> test_function_06", end=' ')
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# assert True
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#
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'''
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test_fictures.py::test_function_04 --> connect to DB/URL/FILE V2 --> test_function_04 PASSED
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test_fictures.py::test_function_05 --> test_function_05 PASSED
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test_fictures.py::test_function_06 --> test_function_06 PASSED --> disconnect from DB/URL/FILE V2
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'''
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# This can also be integrated into classes
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# Note : fixture functions, and method using fixture functions do not need 'self' EXCEPT if pytest.ini is used
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#
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# Althought this format can be accepted in a class not inherited from unittest.TestCase if a pytest.ini file is defined
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# def test_method_01(self,I_handle_DB_URL_FILE_in_class):
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#
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# It will be better to use this format for being accepted by all cases (with or without pytest.ini)
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# #@mark.usefixtures('I_handle_DB_URL_FILE_in_class')
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# def test_method_01(self):
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#
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# class repeating_calls():
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#
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# @fixture(scope='class')
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# def I_handle_DB_URL_FILE_in_class(self):
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# print(" --> connect to DB/URL/FILE in class", end=' ')
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# yield
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# print(" --> disconnect from DB/URL/FILE in class", end=' ')
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#
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# @mark.marker_name1
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# @mark.usefixtures('I_handle_DB_URL_FILE_in_class')
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# def test_method_01(self):
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# print(" --> test_method_01", end=' ')
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# assert True
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#
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# @mark.usefixtures('I_handle_DB_URL_FILE_in_class')
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# def test_method_02(self):
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# print(" --> test_method_02", end=' ')
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# assert True
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#
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# @mark.marker_name1
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# def test_method_03(self):
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# print(" --> test_method_03", end=' ')
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# assert True
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#
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#
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# # Without unittest.TestCase heritage
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# class check_01_Tests(repeating_calls): pass
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#
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#
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# # With unittest.TestCase heritage
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# class check_02_TestCase_Tests(unittest.TestCase, repeating_calls): pass
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'''
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test_fictures.py::check_01_Tests::test_method_01 --> connect to DB/URL/FILE in class --> test_method_01 PASSED
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test_fictures.py::check_01_Tests::test_method_02 --> test_method_02 PASSED
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test_fictures.py::check_01_Tests::test_method_03 --> test_method_03 PASSED --> disconnect from DB/URL/FILE in class
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test_fictures.py::check_02_TestCase_Tests::test_method_01 --> connect to DB/URL/FILE in class --> test_method_01 PASSED
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test_fictures.py::check_02_TestCase_Tests::test_method_02 --> test_method_02 PASSED
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test_fictures.py::check_02_TestCase_Tests::test_method_03 --> test_method_03 PASSED --> disconnect from DB/URL/FILE in class
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'''
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# Fictures can also be added to the conftest.py file for handling the 'package' or 'session' scope once
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# for all the file of the directory
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#
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# in conftest.py :
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# @fixture(scope='session')
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# def I_handle_DB_URL_FILE_in_class():
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# print(" --> connect to DB/URL/FILE in class", end=' ')
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# yield
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# print(" --> disconnect from DB/URL/FILE in class", end=' ')
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#
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# in test file
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class repeating_calls():
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@mark.marker_name2
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@mark.usefixtures('I_handle_DB_URL_FILE_in_class')
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def test_method_01(self):
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print(" --> test_method_01", end=' ')
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assert True
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@mark.usefixtures('I_handle_DB_URL_FILE_in_class')
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def test_method_02(self):
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print(" --> test_method_02", end=' ')
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assert True
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@mark.marker_name2
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def test_method_03(self):
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print(" --> test_method_03", end=' ')
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assert True
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# Without unittest.TestCase heritage
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class check_01_Tests(repeating_calls): pass
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# With unittest.TestCase heritage
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class check_02_TestCase_Tests(unittest.TestCase, repeating_calls): pass
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''' With the 'session' scope, the DB is opened only once at the beginning of all tests,
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even if they are in differents test files, and closed at the end
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>>> pytest -v -s -m marker_name2
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test_fictures.py::check_01_Tests::test_method_01 --> connect to DB/URL/FILE in class --> test_method_01 PASSED
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test_fictures.py::check_01_Tests::test_method_03 --> test_method_03 PASSED
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test_fictures.py::check_02_TestCase_Tests::test_method_01 --> test_method_01 PASSED
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test_fictures.py::check_02_TestCase_Tests::test_method_03 --> test_method_03 PASSED
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test_marks.py::check_04_TestCase_Tests::test_method_01 PASSED
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test_marks.py::check_04_TestCase_Tests::test_method_02 PASSED
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test_marks.py::check_04_TestCase_Tests::test_method_03 SKIPPED --> disconnect from DB/URL/FILE in class
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'''

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