running a pytest hook only once on the start of the tests












1














I'm having a pytest run that invokes N tests. I want all tests to output into the same log, and I want to clear the log before pytest is triggered, so different runs would not contiminate each other. So far, I tried adding my clear_log() to some fixtures or hooks, but none has achieved what In wanted - or they were called each time (pytest_runtest_makereport for example), or they were not called at all (some function that was decorated with pytest.fixture()



I also tried having a global flag that would indicate if this is the first run, but it didn't work either...



Where can I put the function so it would be invoked only once?






python python-2.7 hook pytest







share|improve this question



























    1














    I'm having a pytest run that invokes N tests. I want all tests to output into the same log, and I want to clear the log before pytest is triggered, so different runs would not contiminate each other. So far, I tried adding my clear_log() to some fixtures or hooks, but none has achieved what In wanted - or they were called each time (pytest_runtest_makereport for example), or they were not called at all (some function that was decorated with pytest.fixture()



    I also tried having a global flag that would indicate if this is the first run, but it didn't work either...



    Where can I put the function so it would be invoked only once?






    python python-2.7 hook pytest







    share|improve this question

























      1












      1








      1







      I'm having a pytest run that invokes N tests. I want all tests to output into the same log, and I want to clear the log before pytest is triggered, so different runs would not contiminate each other. So far, I tried adding my clear_log() to some fixtures or hooks, but none has achieved what In wanted - or they were called each time (pytest_runtest_makereport for example), or they were not called at all (some function that was decorated with pytest.fixture()



      I also tried having a global flag that would indicate if this is the first run, but it didn't work either...



      Where can I put the function so it would be invoked only once?






      python python-2.7 hook pytest







      share|improve this question













      I'm having a pytest run that invokes N tests. I want all tests to output into the same log, and I want to clear the log before pytest is triggered, so different runs would not contiminate each other. So far, I tried adding my clear_log() to some fixtures or hooks, but none has achieved what In wanted - or they were called each time (pytest_runtest_makereport for example), or they were not called at all (some function that was decorated with pytest.fixture()



      I also tried having a global flag that would indicate if this is the first run, but it didn't work either...



      Where can I put the function so it would be invoked only once?






      python python-2.7 hook pytest




      python python-2.7 hook pytest






      share|improve this question













      share|improve this question











      share|improve this question




      share|improve this question










      asked 17 hours ago









      CIsForCookies

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      6,68811546
























          1 Answer
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          1














          Following decorator allows you to execute your fixture only once (even if there are multiple number of tests are running):



          @pytest.fixture(scope="session")


          More details here






          share|improve this answer























          • This will call the fixture once for each module. It should be scope="session".
            – hoefling
            14 hours ago










          • @hoefling thanks. fixed.
            – Alderven
            14 hours ago











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          1 Answer
          1






          active

          oldest

          votes









          active

          oldest

          votes






          active

          oldest

          votes









          1














          Following decorator allows you to execute your fixture only once (even if there are multiple number of tests are running):



          @pytest.fixture(scope="session")


          More details here






          share|improve this answer























          • This will call the fixture once for each module. It should be scope="session".
            – hoefling
            14 hours ago










          • @hoefling thanks. fixed.
            – Alderven
            14 hours ago
















          1














          Following decorator allows you to execute your fixture only once (even if there are multiple number of tests are running):



          @pytest.fixture(scope="session")


          More details here






          share|improve this answer























          • This will call the fixture once for each module. It should be scope="session".
            – hoefling
            14 hours ago










          • @hoefling thanks. fixed.
            – Alderven
            14 hours ago














          1












          1








          1






          Following decorator allows you to execute your fixture only once (even if there are multiple number of tests are running):



          @pytest.fixture(scope="session")


          More details here






          share|improve this answer














          Following decorator allows you to execute your fixture only once (even if there are multiple number of tests are running):



          @pytest.fixture(scope="session")


          More details here







          share|improve this answer














          share|improve this answer



          share|improve this answer








          edited 14 hours ago

























          answered 15 hours ago









          Alderven

          533317




          533317












          • This will call the fixture once for each module. It should be scope="session".
            – hoefling
            14 hours ago










          • @hoefling thanks. fixed.
            – Alderven
            14 hours ago


















          • This will call the fixture once for each module. It should be scope="session".
            – hoefling
            14 hours ago










          • @hoefling thanks. fixed.
            – Alderven
            14 hours ago
















          This will call the fixture once for each module. It should be scope="session".
          – hoefling
          14 hours ago




          This will call the fixture once for each module. It should be scope="session".
          – hoefling
          14 hours ago












          @hoefling thanks. fixed.
          – Alderven
          14 hours ago




          @hoefling thanks. fixed.
          – Alderven
          14 hours ago


















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