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NavigationDrawer - window.matchMedia is not a function in some scenarios using jest #783

clenondavis opened this Issue Aug 24, 2018 · 2 comments


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clenondavis commented Aug 24, 2018


Hi @mlaursen and react-md team, how you doing?.

Thanks for the amazing contribution with this frontend lib. Its has been useful for my project.

I appreciate your time in reading this issue description.

I'm trying to create the unit testing for one of the container using jest as the testing lib. When i run this test i have receiving this error.

TypeError: window.matchMedia is not a function

I isolated the unite testing and the react-md implementation in a new create-react-app project, but when i run the test I still receiving the same issue. So I don't know if it something I'm doing wrong or I missing something. It seems like this only happening with NavigationDrawer or Drawer Implementation.

I'll appreciate your time and help.

See img bellow with the error



Link to a gist or code sample where the issue can be reproduced

The issue can not reproduced, because id did find out how to run the jest in codepen using create-react-app as a template. But you can see the test commented on the bottom if the js file.

Code in gist


  • React -^16.4.2
  • react-dom ^16.4.2,
  • React-MD - ^1.5.0
  • create-react-router 1.5.2
  • react-router-dom ^4.3.1
  • react-scripts 1.1.5
  • Browser Versión 68.0.3440.106 (Build oficial) (64 bits)



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mlaursen commented Aug 25, 2018

Oh, I think I ran into this problem before with my documentation server tests. I ended up using a setup script to mock this since some testing environments don't have matchMedia.

window.matchMedia = jest.fn(query => ({
matches: query.indexOf('(min-width: 1025px)') !== -1,

I can update the testing page on the documentation site to add these cases.

@mlaursen mlaursen added the bug label Aug 25, 2018


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clenondavis commented Aug 26, 2018

Hi @mlaursen, how you doing man?

Thanks for your quick answer.

Yes, I see know. Inspecting the Drawer.js code i get to find out that. As how you mention, It's a good idea to add this scenarios as a test case.

Thanks for the solution you shared with me, I have not received any more this bug.

I appreciate your help man.

Best regards.

@clenondavis clenondavis changed the title NavigationDrawer - TypeError: window.matchMedia is not a function displaying when using jest NavigationDrawer - window.matchMedia is not a function in some scenarios using jest Aug 26, 2018

@mlaursen mlaursen closed this in b3a4ee9 Dec 6, 2018

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