Simple reproduction to show that the use of --outputfile --json affects coverage output on the command line.
npm install
npm run test-outputfile
Returns output:
❯ npm run test-outputfile
> [email protected] test-outputfile
> jest --outputFile test-results.json --json
PASS test/hello.test.ts
hello world function
✓ returns the correct string (1 ms)
Test Suites: 1 passed, 1 total
Tests: 1 passed, 1 total
Snapshots: 0 total
Time: 1.935 s, estimated 3 s
Ran all test suites.
Test results written to: test-results.json
npm run test-no-outputfile
Returns output:
❯ npm run test-no-outputfile
> [email protected] test-no-outputfile
> jest
PASS test/hello.test.ts
hello world function
✓ returns the correct string (1 ms)
----------|---------|----------|---------|---------|-------------------
File | % Stmts | % Branch | % Funcs | % Lines | Uncovered Line #s
----------|---------|----------|---------|---------|-------------------
All files | 100 | 100 | 100 | 100 |
index.ts | 100 | 100 | 100 | 100 |
----------|---------|----------|---------|---------|-------------------
Test Suites: 1 passed, 1 total
Tests: 1 passed, 1 total
Snapshots: 0 total
Time: 1.83 s, estimated 2 s
Ran all test suites.