Getting all "Unknown% ( 0/0 )" in coverage results

Environment

1. node -v: v10.13.0

2. npm -v: 6.4.1

3. npm ls jest or npm ls react-scripts (if you haven’t ejected): jest@24.1.0

4. your vscode-jest settings if customized:

   • jest.pathToJest? Do not have
   • jest.pathToConfig? Do not have
   • in jest.config.js:
     collectCoverage: true, collectCoverageFrom: [‘ClientApp/src/**/*.{js,vue}’], coverageReporters: [‘text-summary’],
   • in settings.json: “jest.rootPath”: “web”, “jest.debugMode”: true, “jest.showCoverageOnLoad”: true,

5. Operating system: Windows 10

Prerequisite

• are you able to run jest test from command line? yes
• how do you run your tests from command line? (for example: npm run test or node_modules/.bin/jest) These all work well, showing code coverage summary with interesting results: npm run test npm test – --coverage node node_modules/jest/bin/jest.js

Steps to Reproduce

Start VS Code with a solution with tests. Run the tests by the command “Jest: Start Runner” in VS Code. Look into the Jest output window and see the tests run.

Relevant Debug Info

I get no errors or issues in the Jest output window or in the developer console.

Expected Behavior

Tests run and pass/fail appropriately in VS Code, and I should get a coverage report in the Jest output window with meaningful results

Actual Behavior

Tests run and pass/fail appropriately in VS Code, but I get:

=============================== Coverage summary ===============================
Statements   : Unknown% ( 0/0 )
Branches     : Unknown% ( 0/0 )
Functions    : Unknown% ( 0/0 )
Lines        : Unknown% ( 0/0 )
================================================================================

(This also prevents me from seeing any red highlights for coverage in VS Code text editors.)

[rickyblaha]

I had the same issue, running npm test -- --coverage resulted in 0 statements found in the text report.

But by simply adding the CI=1 environment variable so jest does not run in interactive mode, it produced the expected coverage reports: CI=1 npm test -- --coverage

[spyros-uk]

Same issue here, I am using CRA with Typescript and rescripts.

Dependencies

node: v10.15.0
npm: 6.4.1
react-scripts: 3.0.1
typescript: 3.4.5
@rescripts/cli: 0.0.10

Jest config

{
  ...config,
  setupFiles: ["<rootDir>//test/jest-config/setup.js"],
  testURL: "http://localhost",
  collectCoverage: true,
  coverageReporters: ["json", "html"],
  collectCoverageFrom: ["<rootDir>/src/**/*.{ts,tsx,js,jsx}"],
  testEnvironment: "node",
  transformIgnorePatterns: [
    "<rootDir>/node_modules/(?!(lodash-es|react-apollo)/).+\\.(mjs|js|jsx|ts|tsx)$"
  ],
  transform: {
    ...config.transform,
    "^.+\\.(graphql|gql)$": "jest-transform-graphql"
  },
  moduleFileExtensions: [...testExtensions, ...prevTestExtensions]
}

Result: