Coverage fail for exported object modules with babel-jest

[klarkc]

🐛 Bug Report

ES Modules that are objects (not functions) are bypassed/ignored by coverage tests, even with written tests for the module.

Confirmed in following versions: 24.6, 24.7.*, 24.8 (23.6 is working normally)

To Reproduce

• Install dependencies
• Execute coverage tests with npx jest

Expected behavior

All js files being covered (green), no coverage errors

Link to repl or repo (highly encouraged)

https://github.com/klarkc/jest_cov_bug/

Run npx envinfo --preset jest

  System:
    OS: Linux 4.15 Ubuntu 18.04.2 LTS (Bionic Beaver)
    CPU: (4) x64 Intel(R) Core(TM) i7-5500U CPU @ 2.40GHz
  Binaries:
    Node: 12.4.0 - /usr/local/bin/node
    Yarn: 1.16.0 - ~/.npm-global/bin/yarn
    npm: 6.9.0 - ~/.npm-global/bin/npm
  npmPackages:
    jest: ^24.8.0 => 24.8.0 

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