Use a custom render for rerender using react-testing-library





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I'm using react-testing-library and I have a custom render:



const customRender = (node, ...options) => {
return render(
<ThemeProvider theme={Theme}>
<MemoryRouter>{node}</MemoryRouter>
</ThemeProvider>,
...options
);
};


I can use it successfully for a render in my test but not for a rerender:



test("shows content once data has loaded", () => {
const { queryByTestId, rerender, debug } = render(
<ConnectAccount
currentUser={{
loading: true
}}
/>
);

expect(queryByTestId("content")).toBeNull();

rerender(
<ConnectAccount
currentUser={{
user: {
name: "Test User"
}
}}
/>
);

debug();
});


I get an error TypeError: Cannot read property 'black' of undefined for the rerender. Is there any way for the rerender to use the custom render so I don't have to wrap every rerender in the ThemeProvider?










share|improve this question





























    0















    I'm using react-testing-library and I have a custom render:



    const customRender = (node, ...options) => {
    return render(
    <ThemeProvider theme={Theme}>
    <MemoryRouter>{node}</MemoryRouter>
    </ThemeProvider>,
    ...options
    );
    };


    I can use it successfully for a render in my test but not for a rerender:



    test("shows content once data has loaded", () => {
    const { queryByTestId, rerender, debug } = render(
    <ConnectAccount
    currentUser={{
    loading: true
    }}
    />
    );

    expect(queryByTestId("content")).toBeNull();

    rerender(
    <ConnectAccount
    currentUser={{
    user: {
    name: "Test User"
    }
    }}
    />
    );

    debug();
    });


    I get an error TypeError: Cannot read property 'black' of undefined for the rerender. Is there any way for the rerender to use the custom render so I don't have to wrap every rerender in the ThemeProvider?










    share|improve this question

























      0












      0








      0








      I'm using react-testing-library and I have a custom render:



      const customRender = (node, ...options) => {
      return render(
      <ThemeProvider theme={Theme}>
      <MemoryRouter>{node}</MemoryRouter>
      </ThemeProvider>,
      ...options
      );
      };


      I can use it successfully for a render in my test but not for a rerender:



      test("shows content once data has loaded", () => {
      const { queryByTestId, rerender, debug } = render(
      <ConnectAccount
      currentUser={{
      loading: true
      }}
      />
      );

      expect(queryByTestId("content")).toBeNull();

      rerender(
      <ConnectAccount
      currentUser={{
      user: {
      name: "Test User"
      }
      }}
      />
      );

      debug();
      });


      I get an error TypeError: Cannot read property 'black' of undefined for the rerender. Is there any way for the rerender to use the custom render so I don't have to wrap every rerender in the ThemeProvider?










      share|improve this question














      I'm using react-testing-library and I have a custom render:



      const customRender = (node, ...options) => {
      return render(
      <ThemeProvider theme={Theme}>
      <MemoryRouter>{node}</MemoryRouter>
      </ThemeProvider>,
      ...options
      );
      };


      I can use it successfully for a render in my test but not for a rerender:



      test("shows content once data has loaded", () => {
      const { queryByTestId, rerender, debug } = render(
      <ConnectAccount
      currentUser={{
      loading: true
      }}
      />
      );

      expect(queryByTestId("content")).toBeNull();

      rerender(
      <ConnectAccount
      currentUser={{
      user: {
      name: "Test User"
      }
      }}
      />
      );

      debug();
      });


      I get an error TypeError: Cannot read property 'black' of undefined for the rerender. Is there any way for the rerender to use the custom render so I don't have to wrap every rerender in the ThemeProvider?







      react-testing-library






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      asked Nov 23 '18 at 14:54









      RuthRuth

      204313




      204313
























          1 Answer
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          You need to redifine the rerender method. This should work:



          const customRender = (node, options) => {
          const rendered = render(
          <ThemeProvider theme={Theme}>
          <MemoryRouter>{node}</MemoryRouter>
          </ThemeProvider>,
          options);

          return {
          ...rendered,
          rerender: (ui, options) =>
          customRender(ui, {container: rendered.container, ...options}),
          }
          };





          share|improve this answer
























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            1 Answer
            1






            active

            oldest

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            active

            oldest

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            active

            oldest

            votes









            1














            You need to redifine the rerender method. This should work:



            const customRender = (node, options) => {
            const rendered = render(
            <ThemeProvider theme={Theme}>
            <MemoryRouter>{node}</MemoryRouter>
            </ThemeProvider>,
            options);

            return {
            ...rendered,
            rerender: (ui, options) =>
            customRender(ui, {container: rendered.container, ...options}),
            }
            };





            share|improve this answer




























              1














              You need to redifine the rerender method. This should work:



              const customRender = (node, options) => {
              const rendered = render(
              <ThemeProvider theme={Theme}>
              <MemoryRouter>{node}</MemoryRouter>
              </ThemeProvider>,
              options);

              return {
              ...rendered,
              rerender: (ui, options) =>
              customRender(ui, {container: rendered.container, ...options}),
              }
              };





              share|improve this answer


























                1












                1








                1







                You need to redifine the rerender method. This should work:



                const customRender = (node, options) => {
                const rendered = render(
                <ThemeProvider theme={Theme}>
                <MemoryRouter>{node}</MemoryRouter>
                </ThemeProvider>,
                options);

                return {
                ...rendered,
                rerender: (ui, options) =>
                customRender(ui, {container: rendered.container, ...options}),
                }
                };





                share|improve this answer













                You need to redifine the rerender method. This should work:



                const customRender = (node, options) => {
                const rendered = render(
                <ThemeProvider theme={Theme}>
                <MemoryRouter>{node}</MemoryRouter>
                </ThemeProvider>,
                options);

                return {
                ...rendered,
                rerender: (ui, options) =>
                customRender(ui, {container: rendered.container, ...options}),
                }
                };






                share|improve this answer












                share|improve this answer



                share|improve this answer










                answered Nov 23 '18 at 16:45









                GpxGpx

                2,21621626




                2,21621626
































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