Estoy trabajando en un proyecto angular 8 y tengo algunos problemas con la ejecución de TU.

Cuando ejecuto mi TU con la ng test aparece este error:

 > ng test --progress --browsers ChromeHeadless_custom 10% building 1/1 modules 0 active05 01 2022 16:01:11.191:INFO [karma-server]: Karma v4.4.1 server started at http://0.0.0.0:9876/ 05 01 2022 16:01:11.195:INFO [launcher]: Launching browsers ChromeHeadless_custom with concurrency unlimited 05 01 2022 16:01:11.201:INFO [launcher]: Starting browser ChromeHeadless ERROR in TypeError: Cannot read property 'lastIndexOf' of undefined at Object.startsWith (C:\Users\e12404\Documents\project\lib_common\node_modules\typescript\lib\typescript.js:1914:20) at isPathRelativeToParent (C:\Users\v\Documents\project\lib_common\node_modules\typescript\lib\typescript.js:93723:23) at C:\Users\v\Documents\project\lib_common\node_modules\typescript\lib\typescript.js:93682:24 at Object.firstDefined (C:\Users\v\Documents\project\lib_common\node_modules\typescript\lib\typescript.js:295:26) at getPathRelativeToRootDirs (C:\Users\v\Documents\project\lib_common\node_modules\typescript\lib\typescript.js:93680:23) at tryGetModuleNameFromRootDirs (C:\Users\v\Documents\project\lib_common\node_modules\typescript\lib\typescript.js:93553:40) at getLocalModuleSpecifier (C:\Users\v\Documents\project\lib_common\node_modules\typescript\lib\typescript.js:93422:44) at C:\Users\v\Documents\project\lib_common\node_modules\typescript\lib\typescript.js:93409:96 at Array.map (<anonymous>) at Object.getModuleSpecifiers (C:\Users\v\Documents\project\lib_common\node_modules\typescript\lib\typescript.js:93409:57) at getSpecifierForModuleSymbol (C:\Users\v\Documents\project\lib_common\node_modules\typescript\lib\typescript.js:35318:62) at createExpressionFromSymbolChain (C:\Users\v\Documents\project\lib_common\node_modules\typescript\lib\typescript.js:35434:49) at symbolToExpression (C:\Users\v\Documents\project\lib_common\node_modules\typescript\lib\typescript.js:35429:24) at C:\Users\v\Documents\project\lib_common\node_modules\typescript\lib\typescript.js:34427:106 at withContext (C:\Users\v\Documents\project\lib_common\node_modules\typescript\lib\typescript.js:34456:37) at symbolToExpression (C:\Users\v\Documents\project\lib_common\node_modules\typescript\lib\typescript.js:34427:28) npm ERR! Test failed. See above for more details.

Ver salida de consola

El proyecto se compila sin errores. Así que tal vez sea un problema en mis pruebas.

Vi problemas similares, pero se trataba de un analizador de mecanografiado de vscode o de un error de mecanografiado.

Tengo el mismo error con typescript@3.5.3 y typescript@4.5.0

Tienes alguna idea ?