javascript - Reflect.getOwnMetadata is not a function in karma with latest Aurelia - Stack Overflow

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After updating to the latest version of Aurelia (March update beta.1.1.4), I'm getting the following error every time I run karma tests:

Error: Reflect.getOwnMetadata is not a function
Error loading C:/Software/myproject/test/unit/myclass.spec.ts

How do I fix it?

After updating to the latest version of Aurelia (March update beta.1.1.4), I'm getting the following error every time I run karma tests:

Error: Reflect.getOwnMetadata is not a function
Error loading C:/Software/myproject/test/unit/myclass.spec.ts

How do I fix it?

• javascript
• typescript
• karma-runner
• aurelia

Share Improve this question Follow edited Mar 3, 2016 at 19:16 Mikhail Shilkov asked Mar 3, 2016 at 14:42 Mikhail ShilkovMikhail Shilkov 35.2k44 gold badges7676 silver badges110110 bronze badges

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1 Answer 1

Sorted by: Reset to default 12

This has to do with the change of Aurelia from core-js to home-grown polyfills. The Reflect polyfill is missing and tests fail to run.

This problem is addressed in Aurelia navigation skeleton app by the following import statement in each unit test file:

import 'aurelia-polyfills';

I solved it by creating a setup.ts (or setup.js resp. to your language) file with just this statement, and then just listing it in karma.config.js at the first place.

for JS e.g.:

jspm  : {
  loadFiles: ['test/unit/setup.js', 'test/unit/**/*.js'],
  ...
}

for Typescript e.g.:

files: ['test/unit/setup.ts', 'test/unit/**/*.ts'],
...

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