"Invalid file coverage object, missing keys"

[GravlLift]

The title'd error message is a bit misleading. Spent a good deal of time trying to figure out why I was getting

Invalid file coverage object, missing keys, found:path,all,statementMap,s,branchMap,b,fnMap,f

which encompasses all the keys that are checked in file-coverage.js.

Turns out that I was passing in an object that looked something like

{
  path: "",
  ...
}

... so while the path key was in fact present, it was a falsy value.

Maybe the error message could be changed to "missing or falsy" or something like that?

[yatessss]

in my case，remove workerThreads: true in jest.config.js， is worked