Created
November 28, 2018 14:51
-
-
Save irokhes/7e4c1cdd989c4304478331ac3fdad904 to your computer and use it in GitHub Desktop.
Function to assert against promise rejection
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| //Credit to: | |
| //https://www.nearform.com/blog/avoiding-common-hurdles-in-unit-testing/ | |
| const expectRejection = async (p, message) => { | |
| try { | |
| await p | |
| } catch (error) { | |
| if (error.message === message) return | |
| throw new Error('Expected error "${message}" but found "${error.message}"') | |
| } | |
| throw new Error('Expected error "${message}" but no error occurred.') | |
| } | |
| test('invalid input causes an error', async () => { | |
| await expectRejection(doSomeTest({ input: 'invalid' }), 'Validation failed.') | |
| }) |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment