lerna + typescript + coverage

[axelnormand]

Issue description or question

I've setup an example monorepo for lerna + typescript 3 with project references + jest etc here:
https://github.com/axelnormand/react-typescript-monorepo

The issue is the code coverage only seems to be working for the common module, not app1 or app2. See screenshot. This has me quite confused! Any ideas much appreciated.

Wallaby.js configuration file

//
// Wallaby config reads tsconfig.json and jest.config.js out of the box
//

module.exports = function(wallaby) {
  return {
    files: [
      '**/src/**/*.{ts,tsx}',
      { pattern: '**/*.json', instrument: false },
      { pattern: '**/*.js', instrument: false },
      '!**/src/**/*.test.{ts,tsx}',
      '!**/src/**/*.story.tsx',
      '!**/node_modules/**/*',
      '!**/dist/**/*',
    ],
    tests: ['**/src/**/*.test.{ts,tsx}', '!**/node_modules/**/*'],
    env: { type: 'node', runner: 'node' },
    testFramework: 'jest',

    // make wallaby following lerna packages
    setup: () => {
      const jestConfig = require('./jest.config');
      jestConfig.moduleNameMapper = {
        ...jestConfig.moduleNameMapper,
        '^@monorepo/common/(.*)$': '<rootDir>/common/src/$1',        
      };
      wallaby.testFramework.configure(jestConfig);
    },

    reportConsoleErrorAsError: true,
    lowCoverageThreshold: 80,
    debug: true,
  };
};

Code editor or IDE name and version

Visual Studio Code v1.28.2

OS name and version

Windows 10

[axelnormand]

Actually think its a jest issue :)
something to do with multi-project setting
jestjs/jest#5457