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Summary
Although
fail
is included in@types/jest
, it is not part of thejest
API anymore (see this related issue: jestjs/jest#11698).This was not detected because
fail
throws an error as a side effect, which is the ultimate purpose offail
in the tests, but the error being thrown isReferenceError
, due to the use of an undefined function:(Note: the
fail
function is part of thejest-extended
library, but this library is not currently installed (see: https://jest-extended.jestcommunity.dev/docs/matchers/fail)Changes
fail
calls from tests, to use plain promise rejections instead.