Coverage Broken: metrics.isEmpty is not a function at tableRow

command run: jest --forceExit --verbose --bail --useStderr --runInBand --expand --colors --coverage

output: Failed to write coverage reports: ERROR: TypeError: metrics.isEmpty is not a function STACK: TypeError: metrics.isEmpty is not a function at tableRow (/Users/qtb9604/bmw/packages/http/node_modules/istanbul-reports/lib/text/index.js:133:27) at TextReport.onSummary (/Users/qtb9604/bmw/packages/http/node_modules/istanbul-reports/lib/text/index.js:188:15) at TextReport.onDetail (/Users/qtb9604/bmw/packages/http/node_modules/istanbul-reports/lib/text/index.js:193:17) at Visitor.(anonymous function) [as onDetail] (/Users/qtb9604/bmw/packages/http/node_modules/istanbul-lib-report/lib/tree.js:34:30) at ReportNode.Node.visit (/Users/qtb9604/bmw/packages/http/node_modules/istanbul-lib-report/lib/tree.js:123:17) at /Users/qtb9604/bmw/packages/http/node_modules/istanbul-lib-report/lib/tree.js:116:23 at Array.forEach (native) at visitChildren (/Users/qtb9604/bmw/packages/http/node_modules/istanbul-lib-report/lib/tree.js:115:32) at ReportNode.Node.visit (/Users/qtb9604/bmw/packages/http/node_modules/istanbul-lib-report/lib/tree.js:126:5) at /Users/qtb9604/bmw/packages/http/node_modules/istanbul-lib-report/lib/tree.js:116:23

jest --debug yields: { "configs": [ { "automock": false, "browser": false, "cache": true, "cacheDirectory": "/var/folders/t6/0brzsz0s6v5fqttj19rylpn18r1g3z/T/jest_mm3xxb", "clearMocks": false, "coveragePathIgnorePatterns": [ "index.ts", "locales", "src/controllers", "src/middleware", "src/prototypes", "src/types", "tests/unit/mocks" ], "detectLeaks": false, "forceCoverageMatch": [], "globals": { "ts-jest": { "tsConfigFile": "tsconfig.json" } }, "haste": { "providesModuleNodeModules": [] }, "moduleDirectories": [ "node_modules" ], "moduleFileExtensions": [ "ts", "js" ], "moduleNameMapper": {}, "modulePathIgnorePatterns": [], "name": "3fa0a9dc4bb9d4586ae003b68f15eda0", "resetMocks": false, "resetModules": false, "restoreMocks": false, "rootDir": "/Users/qtb9604/vea-server", "roots": [ "/Users/qtb9604/vea-server" ], "runner": "jest-runner", "setupFiles": [], "snapshotSerializers": [], "testEnvironment": "/Users/qtb9604/vea-server/node_modules/jest-environment-node/build/index.js", "testEnvironmentOptions": {}, "testLocationInResults": false, "testMatch": [ "**/tests/**/*.test.(ts)" ], "testPathIgnorePatterns": [ "/node_modules/" ], "testRegex": "", "testRunner": "/Users/qtb9604/vea-server/node_modules/jest-jasmine2/build/index.js", "testURL": "about:blank", "timers": "real", "transform": [ [ "^.+\\.(ts|tsx)$", "/Users/qtb9604/vea-server/node_modules/ts-jest/preprocessor.js" ] ], "transformIgnorePatterns": [ "/node_modules/" ], "watchPathIgnorePatterns": [] } ], "globalConfig": { "bail": false, "changedFilesWithAncestor": false, "collectCoverageFrom": [ "src/**" ], "coverageDirectory": "/Users/qtb9604/vea-server/coverage", "coverageReporters": [ "json", "text", "lcov", "clover" ], "detectLeaks": false, "expand": false, "globalSetup": null, "globalTeardown": null, "listTests": false, "maxWorkers": 7, "noStackTrace": false, "nonFlagArgs": [], "notify": false, "notifyMode": "always", "passWithNoTests": false, "rootDir": "/Users/qtb9604/vea-server", "runTestsByPath": false, "testFailureExitCode": 1, "testPathPattern": "", "testResultsProcessor": null, "updateSnapshot": "new", "useStderr": false, "verbose": null, "watch": false, "watchman": true }, "version": "22.4.2" }

[SimenB]

try yarn remove jest && yarn add --dev jest (or npm equivalent) to amke sure all of Jest’s dependencies are updated as well

[benjamincharity]

FWIW, I had to manually delete my yarn.lock file to get this working. Much thanks to others in this thread that pointed me in the correct direction 🙏 … I was banging my head around for a while.

---

Things tried with no luck (in no particular order):

• manually remove the yarn cache file from my machine
• tell yarn to clean up the cache
• manually lock istanbul deps to earlier versions
• remove node_modules and reinstall
• bump jest back down to 22.4.0