TypeError: tr.configsFor is not a function causes on ts-jest@26.4.2 and above

[nogic1008]

In this package, TsJestTransformer.configsFor() is used in utils/getTsJestConfig function.
But, unfortunately, this method has been deleted on v26.4.2, kulshekhar/ts-jest#2020.
So TypeError: tr.configsFor is not a function error causes on test.

Workaround

downgrade ts-jest version to 26.4.1 or below in package-lock.json(npm) or yarn.lock(yarn)

Fixes

plz merge #284 and release

Refs

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[zigomir]

Ugh, thanks @nogic1008 for opening this. I've spent so much time figuring out what's going on here. +💯

[ahnpnl]

This can be fixed by reverting kulshekhar/ts-jest#2020 . ts-jest will have the next release 26.4.4 soon which can include the revert.

[ahnpnl]

ts-jest 26.4.4 is out, this issue should be fixed now

[nogic1008]

@ahnpnl Thank you for your works!
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