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Class extends value undefined is not a constructor or null

See original GitHub issue

Issue :

When I run my project using node ts-node/register I don’t get any errors, however with ts-jest I receive the following:

 ● Test suite failed to run

    TypeError: Class extends value undefined is not a constructor or null

      at Object.<anonymous> (../node_modules/google-gax/src/grpc.ts:110:43)
      at Object.<anonymous> (../node_modules/google-gax/src/index.ts:32:1)

The file grpc.ts doesn’t actually exist, it’s a JS file really. I wonder why it’s trying to include grpc.ts when only a js file exists.

Expected behavior :

ts-jest should be able to run file like ts-node without the above error.

Issue Analytics

State:
Created 4 years ago
Reactions:5
Comments:8 (1 by maintainers)

Top GitHub Comments

37reactions

shivanshutiari319commented, Dec 26, 2019

i also go through thr same problem as a begginer.my fault is that i just use c instead of C in component.i know that is very silly mistake.

18reactions

aditisaran26commented, Jul 5, 2020

I was getting the same error since it was my first time with component. The error was instead of writing Component ,i wrote component. so check whether it is C or c .