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Karma with Webpack 2 raises errors about Promises · Issue #2227 · karma-runner/karma · GitHub
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Description
Expected behavior
Karma+Webpack2 runs without raising errors about Promises (especially when none of the tests or code use Promises).
Actual behavior
Each time Karma fetches a file with the webpack preprocessor, it raises the following warning:
Fetching src/ExampleTest.js
Warning: .then() only accepts functions but was passed: [object Undefined], [object Undefined]
at then (node_modules/karma/lib/middleware/common.js:14:39)
at node_modules/karma/lib/middleware/source_files.js:29:25
at call (node_modules/connect/index.js:239:7)
at next (node_modules/connect/index.js:183:5)
at node_modules/karma/lib/middleware/karma.js:231:12
at call (node_modules/connect/index.js:239:7)
at next (node_modules/connect/index.js:183:5)
at node_modules/karma/lib/middleware/strip_host.js:13:5
at call (node_modules/connect/index.js:239:7)
at next (node_modules/connect/index.js:183:5)
at node_modules/karma/lib/middleware/stopper.js:9:50
at call (node_modules/connect/index.js:239:7)Enviroment Details
Karma 1.1.0 with Webpack 2 through Babel 6 on macOS 10.11.5 with npm 3.8.8 and node v5.11.0. Please see package.json for full requirements.
Steps to reproduce the behaviour
- Clone the example repo found at https://github.com/jambonsw/webpack2-karma-logging-error-mve
- Install the packages with
npm install - Run tests with
npm test
nuschk, Zashy, shaharmor and Corey-Maler
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