Still don't get how to mock an imported library - Python












1















I've looked around but still don't get how to mock a library used inside a function and assert that its been called properly.



a.py

import win32clipboard

def copy():

win32clipboard.OpenClipboard()
win32clipboard.EmptyClipboard()
win32clipboard.SetClipboardText('dummy')
win32clipboard.CloseClipboard()


test_a.py



import a
import pytest

def test_copy():

# Mock win32clipboard somehow
# Run a.copy()

# assert mock win32clipboard.call_count == 4









share|improve this question



























    1















    I've looked around but still don't get how to mock a library used inside a function and assert that its been called properly.



    a.py

    import win32clipboard

    def copy():

    win32clipboard.OpenClipboard()
    win32clipboard.EmptyClipboard()
    win32clipboard.SetClipboardText('dummy')
    win32clipboard.CloseClipboard()


    test_a.py



    import a
    import pytest

    def test_copy():

    # Mock win32clipboard somehow
    # Run a.copy()

    # assert mock win32clipboard.call_count == 4









    share|improve this question

























      1












      1








      1








      I've looked around but still don't get how to mock a library used inside a function and assert that its been called properly.



      a.py

      import win32clipboard

      def copy():

      win32clipboard.OpenClipboard()
      win32clipboard.EmptyClipboard()
      win32clipboard.SetClipboardText('dummy')
      win32clipboard.CloseClipboard()


      test_a.py



      import a
      import pytest

      def test_copy():

      # Mock win32clipboard somehow
      # Run a.copy()

      # assert mock win32clipboard.call_count == 4









      share|improve this question














      I've looked around but still don't get how to mock a library used inside a function and assert that its been called properly.



      a.py

      import win32clipboard

      def copy():

      win32clipboard.OpenClipboard()
      win32clipboard.EmptyClipboard()
      win32clipboard.SetClipboardText('dummy')
      win32clipboard.CloseClipboard()


      test_a.py



      import a
      import pytest

      def test_copy():

      # Mock win32clipboard somehow
      # Run a.copy()

      # assert mock win32clipboard.call_count == 4






      python mocking pytest






      share|improve this question













      share|improve this question











      share|improve this question




      share|improve this question










      asked Nov 4 '18 at 21:17









      curiousgeorgecuriousgeorge

      417




      417
























          1 Answer
          1






          active

          oldest

          votes


















          1














          There is a mistake in your approach.



          win32clipboard is a library, with some classes and methods. You must mock every class from this library you want to use (OpenClipboard, EmptyClipboard, SetClipboardText and CloseClipboard)



          import a
          import pytest
          from unittest.mock import patch

          @patch('win32clipboard.OpenClipboard')
          @patch('win32clipboard.EmptyClipboard')
          @patch('win32clipboard.SetClipboardText')
          @patch('win32clipboard.CloseClipboard')
          def test_copy(mock_close, mock_set, mock_empty, mock_open):
          a.copy()

          assert mock_close.called
          assert mock_set.called
          assert mock_empty.called
          assert mock_open.called





          share|improve this answer



















          • 1





            I actually found out the answer to my own question here some time ago already but my post got deleted for not clarifying enough, apparently. I wasn't even aware since I never came back to check this thread but thanks for giving a perfect example (using decorators) for others to see how its done @MauroBaraldi!

            – curiousgeorge
            Nov 24 '18 at 21:36











          Your Answer






          StackExchange.ifUsing("editor", function () {
          StackExchange.using("externalEditor", function () {
          StackExchange.using("snippets", function () {
          StackExchange.snippets.init();
          });
          });
          }, "code-snippets");

          StackExchange.ready(function() {
          var channelOptions = {
          tags: "".split(" "),
          id: "1"
          };
          initTagRenderer("".split(" "), "".split(" "), channelOptions);

          StackExchange.using("externalEditor", function() {
          // Have to fire editor after snippets, if snippets enabled
          if (StackExchange.settings.snippets.snippetsEnabled) {
          StackExchange.using("snippets", function() {
          createEditor();
          });
          }
          else {
          createEditor();
          }
          });

          function createEditor() {
          StackExchange.prepareEditor({
          heartbeatType: 'answer',
          autoActivateHeartbeat: false,
          convertImagesToLinks: true,
          noModals: true,
          showLowRepImageUploadWarning: true,
          reputationToPostImages: 10,
          bindNavPrevention: true,
          postfix: "",
          imageUploader: {
          brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
          contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
          allowUrls: true
          },
          onDemand: true,
          discardSelector: ".discard-answer"
          ,immediatelyShowMarkdownHelp:true
          });


          }
          });














          draft saved

          draft discarded


















          StackExchange.ready(
          function () {
          StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53145554%2fstill-dont-get-how-to-mock-an-imported-library-python%23new-answer', 'question_page');
          }
          );

          Post as a guest















          Required, but never shown

























          1 Answer
          1






          active

          oldest

          votes








          1 Answer
          1






          active

          oldest

          votes









          active

          oldest

          votes






          active

          oldest

          votes









          1














          There is a mistake in your approach.



          win32clipboard is a library, with some classes and methods. You must mock every class from this library you want to use (OpenClipboard, EmptyClipboard, SetClipboardText and CloseClipboard)



          import a
          import pytest
          from unittest.mock import patch

          @patch('win32clipboard.OpenClipboard')
          @patch('win32clipboard.EmptyClipboard')
          @patch('win32clipboard.SetClipboardText')
          @patch('win32clipboard.CloseClipboard')
          def test_copy(mock_close, mock_set, mock_empty, mock_open):
          a.copy()

          assert mock_close.called
          assert mock_set.called
          assert mock_empty.called
          assert mock_open.called





          share|improve this answer



















          • 1





            I actually found out the answer to my own question here some time ago already but my post got deleted for not clarifying enough, apparently. I wasn't even aware since I never came back to check this thread but thanks for giving a perfect example (using decorators) for others to see how its done @MauroBaraldi!

            – curiousgeorge
            Nov 24 '18 at 21:36
















          1














          There is a mistake in your approach.



          win32clipboard is a library, with some classes and methods. You must mock every class from this library you want to use (OpenClipboard, EmptyClipboard, SetClipboardText and CloseClipboard)



          import a
          import pytest
          from unittest.mock import patch

          @patch('win32clipboard.OpenClipboard')
          @patch('win32clipboard.EmptyClipboard')
          @patch('win32clipboard.SetClipboardText')
          @patch('win32clipboard.CloseClipboard')
          def test_copy(mock_close, mock_set, mock_empty, mock_open):
          a.copy()

          assert mock_close.called
          assert mock_set.called
          assert mock_empty.called
          assert mock_open.called





          share|improve this answer



















          • 1





            I actually found out the answer to my own question here some time ago already but my post got deleted for not clarifying enough, apparently. I wasn't even aware since I never came back to check this thread but thanks for giving a perfect example (using decorators) for others to see how its done @MauroBaraldi!

            – curiousgeorge
            Nov 24 '18 at 21:36














          1












          1








          1







          There is a mistake in your approach.



          win32clipboard is a library, with some classes and methods. You must mock every class from this library you want to use (OpenClipboard, EmptyClipboard, SetClipboardText and CloseClipboard)



          import a
          import pytest
          from unittest.mock import patch

          @patch('win32clipboard.OpenClipboard')
          @patch('win32clipboard.EmptyClipboard')
          @patch('win32clipboard.SetClipboardText')
          @patch('win32clipboard.CloseClipboard')
          def test_copy(mock_close, mock_set, mock_empty, mock_open):
          a.copy()

          assert mock_close.called
          assert mock_set.called
          assert mock_empty.called
          assert mock_open.called





          share|improve this answer













          There is a mistake in your approach.



          win32clipboard is a library, with some classes and methods. You must mock every class from this library you want to use (OpenClipboard, EmptyClipboard, SetClipboardText and CloseClipboard)



          import a
          import pytest
          from unittest.mock import patch

          @patch('win32clipboard.OpenClipboard')
          @patch('win32clipboard.EmptyClipboard')
          @patch('win32clipboard.SetClipboardText')
          @patch('win32clipboard.CloseClipboard')
          def test_copy(mock_close, mock_set, mock_empty, mock_open):
          a.copy()

          assert mock_close.called
          assert mock_set.called
          assert mock_empty.called
          assert mock_open.called






          share|improve this answer












          share|improve this answer



          share|improve this answer










          answered Nov 23 '18 at 20:08









          Mauro BaraldiMauro Baraldi

          4,03112032




          4,03112032








          • 1





            I actually found out the answer to my own question here some time ago already but my post got deleted for not clarifying enough, apparently. I wasn't even aware since I never came back to check this thread but thanks for giving a perfect example (using decorators) for others to see how its done @MauroBaraldi!

            – curiousgeorge
            Nov 24 '18 at 21:36














          • 1





            I actually found out the answer to my own question here some time ago already but my post got deleted for not clarifying enough, apparently. I wasn't even aware since I never came back to check this thread but thanks for giving a perfect example (using decorators) for others to see how its done @MauroBaraldi!

            – curiousgeorge
            Nov 24 '18 at 21:36








          1




          1





          I actually found out the answer to my own question here some time ago already but my post got deleted for not clarifying enough, apparently. I wasn't even aware since I never came back to check this thread but thanks for giving a perfect example (using decorators) for others to see how its done @MauroBaraldi!

          – curiousgeorge
          Nov 24 '18 at 21:36





          I actually found out the answer to my own question here some time ago already but my post got deleted for not clarifying enough, apparently. I wasn't even aware since I never came back to check this thread but thanks for giving a perfect example (using decorators) for others to see how its done @MauroBaraldi!

          – curiousgeorge
          Nov 24 '18 at 21:36




















          draft saved

          draft discarded




















































          Thanks for contributing an answer to Stack Overflow!


          • Please be sure to answer the question. Provide details and share your research!

          But avoid



          • Asking for help, clarification, or responding to other answers.

          • Making statements based on opinion; back them up with references or personal experience.


          To learn more, see our tips on writing great answers.




          draft saved


          draft discarded














          StackExchange.ready(
          function () {
          StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f53145554%2fstill-dont-get-how-to-mock-an-imported-library-python%23new-answer', 'question_page');
          }
          );

          Post as a guest















          Required, but never shown





















































          Required, but never shown














          Required, but never shown












          Required, but never shown







          Required, but never shown

































          Required, but never shown














          Required, but never shown












          Required, but never shown







          Required, but never shown







          Popular posts from this blog

          404 Error Contact Form 7 ajax form submitting

          How to know if a Active Directory user can login interactively

          Refactoring coordinates for Minecraft Pi buildings written in Python