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Received `postMessage` for "undefined" but the method doesn't exist

See original GitHub issue

Expected behavior

Projects that use postMessage should not break karma

Actual behavior

This change makes karma incompatible with projects that use postMessage https://github.com/karma-runner/karma/commit/81b1f04c70eb14ca675f60b3f374bb50b96d80fe#diff-e935b6c040afc12b7a014e625f4f0cedR40

Enviroment Details

https://bitbucket.org/atlassian/simple-xdm/addon/pipelines/home#!/results/{cc56070d-5ec1-43f2-ab8e-07cf4e6309a5}

Karma version (output of karma --version): 1.1.1
Relevant part of your karma.config.js file N/A

Steps to reproduce the behaviour

Write test that uses postMessage
Run test with karma
Karma receives postMessage it doesn’t expect and balks

Consider changing log to warn rather than error or namespacing your postMessages

Issue Analytics

State:
Created 7 years ago
Reactions:6
Comments:10 (8 by maintainers)

Top GitHub Comments

1reaction

twolfsoncommented, Jul 12, 2016

Ah, damn. Sorry for my ignorance on that. Maybe we should move from data.method to data.__karma_method as a magic key (to prevent issues where an application might use data.method as well) and remove the assertion (or drop it to a console.warn) to prevent throwing errors with other programs using postMessage at all.

0reactions

twolfsoncommented, Jul 13, 2016

I took a shot at a test but wasn’t able to get it working and ran out of time. However, I have completed a patch and will be submitting a PR shortly.