Running coverage on untested files...Failed to collect coverage from

Following code:

function two(one, two?) {
    return 3;
}

two('herro');

Results in:

> npx jest --config jestrc.json

 PASS  test/unit/server.spec.ts
    ✓  (2 ms)

Running coverage on untested files...Failed to collect coverage from /home/karl/dev/afry/tmr-gateway/src/server.ts
ERROR: /home/karl/dev/afry/tmr-gateway/src/server.ts: Unexpected token, expected "," (1:21)

> 1 | function two(one, two?) {
    |                      ^
  2 |     return 3;
  3 | }
  4 | 
STACK: SyntaxError: /home/karl/dev/afry/tmr-gateway/src/server.ts: Unexpected token, expected "," (1:21)

> 1 | function two(one, two?) {
    |                      ^
  2 |     return 3;
  3 | }
  4 | 
    at Parser._raise (/home/karl/dev/afry/tmr-gateway/node_modules/@babel/parser/lib/index.js:799:17)
    at Parser.raiseWithData (/home/karl/dev/afry/tmr-gateway/node_modules/@babel/parser/lib/index.js:792:17)
    at Parser.raise (/home/karl/dev/afry/tmr-gateway/node_modules/@babel/parser/lib/index.js:786:17)
    at Parser.unexpected (/home/karl/dev/afry/tmr-gateway/node_modules/@babel/parser/lib/index.js:9089:16)
    at Parser.expect (/home/karl/dev/afry/tmr-gateway/node_modules/@babel/parser/lib/index.js:9075:28)
    at Parser.parseBindingList (/home/karl/dev/afry/tmr-gateway/node_modules/@babel/parser/lib/index.js:9473:14)
    at Parser.parseFunctionParams (/home/karl/dev/afry/tmr-gateway/node_modules/@babel/parser/lib/index.js:12322:24)
    at Parser.parseFunction (/home/karl/dev/afry/tmr-gateway/node_modules/@babel/parser/lib/index.js:12297:10)
    at Parser.parseFunctionStatement (/home/karl/dev/afry/tmr-gateway/node_modules/@babel/parser/lib/index.js:11925:17)
    at Parser.parseStatementContent (/home/karl/dev/afry/tmr-gateway/node_modules/@babel/parser/lib/index.js:11615:21)
----------|---------|----------|---------|---------|-------------------
File      | % Stmts | % Branch | % Funcs | % Lines | Uncovered Line #s 
----------|---------|----------|---------|---------|-------------------
All files |       0 |      100 |     100 |       0 |                   
 argh.ts  |       0 |      100 |     100 |       0 | 1                 
----------|---------|----------|---------|---------|-------------------
Test Suites: 1 passed, 1 total
Tests:       1 passed, 1 total
Snapshots:   0 total
Time:        1.263 s
Ran all test suites.

But the following code:

function two(one) {
    return 3;
}

two('herro');

Results in:

> npx jest --config jestrc.json

 PASS  test/unit/server.spec.ts
    ✓  (1 ms)

------------|---------|----------|---------|---------|-------------------
File        | % Stmts | % Branch | % Funcs | % Lines | Uncovered Line #s 
------------|---------|----------|---------|---------|-------------------
All files   |       0 |      100 |       0 |       0 |                   
 src        |       0 |      100 |       0 |       0 |                   
  server.ts |       0 |      100 |       0 |       0 | 2-5               
 test/unit  |       0 |      100 |     100 |       0 |                   
  argh.ts   |       0 |      100 |     100 |       0 | 1                 
------------|---------|----------|---------|---------|-------------------
Test Suites: 1 passed, 1 total
Tests:       1 passed, 1 total
Snapshots:   0 total
Time:        1.227 s
Ran all test suites.

package.json:

{
    "name": "tmr-gateway",
    "version": "0.1.0",
    "description": "",
    "main": "index.js",
    "scripts": {
        "clean": "npx shx rm -rf dist coverage report",
        "build": "npx shx rm -rf dist && npx tsc",
        "lint:check": "npx eslint .",
        "lint:fix": "npx eslint . --fix",
        "style:check": "npx prettier --check .",
        "style:fix": "npx prettier --write .",
        "test": "npx jest --config jestrc.json"
    },
    "author": "",
    "license": "",
    "devDependencies": {
        "@types/jest": "26.0.15",
        "cross-env": "7.0.2",
        "eslint": "7.12.1",
        "jest": "26.6.1",
        "jest-junit": "12.0.0",
        "jsdoc": "3.6.6",
        "nodemon": "2.0.6",
        "prettier": "2.1.2",
        "shx": "0.3.3",
        "typescript": "4.0.5"
    },
    "dependencies": {
        "express": "4.17.1"
    }
}

jest config:

{
    "bail": 1,
    "verbose": true,
    "collectCoverage": true,
    "coverageReporters": ["json", "lcov", "text", "clover"],
    "collectCoverageFrom": ["src/**/*.{ts,tsx}", "test/**/*.{ts,tsx}"],
    "reporters": [
        "default",
        [
            "jest-junit",
            {
                "outputDirectory": "report",
                "outputName": "junit.xml"
            }
        ]
    ]
}

Running on Linux ubuntu 16.04.

[KuSh]

According to kulshekhar/ts-jest#3630 (comment) switching to v8 coverage collector fixes the problem. It did for me 👍

I am trying vitest, so, no idea about this.

This is a jest setting

[github-actions[bot]]

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