title: Cannot find module '@angular/core/testing'
body: <p>I am getting an error as <code>Cannot find module '@angular/core/testing'</code> - with my spec files. how to fix this?</p>
  
  <p>any one help me? I am using angular 8, here is my <code>tsconfig.json</code> file:</p>
  
  <pre><code>{
    "compileOnSave": false,
    "compilerOptions": {
      "baseUrl": "./src",
      "paths": {
        "*": [
          "node_modules/*",
          "src/types/*"
        ]
      },
      "outDir": "./dist/out-tsc",
      "sourceMap": true,
      "declaration": false,
      "module": "esnext",
      "moduleResolution": "node",
      "emitDecoratorMetadata": true,
      "experimentalDecorators": true,
      "importHelpers": true,
      "target": "es2015",
      "downlevelIteration": true,
      "typeRoots": [
        "node_modules/@types"
      ],
      "paths": {
        "jszip": [
          "node_modules/jszip/dist/jszip.min.js"
        ]
      },
      "paths": {
        "globalize": [
          "node_modules/globalize/dist/globalize"
        ],
        "globalize/*": [
          "node_modules/globalize/dist/globalize/*"
        ],
        "cldr": [
          "node_modules/cldrjs/dist/cldr"
        ],
        "cldr/*": [
          "node_modules/cldrjs/dist/cldr/*"
        ],
        "jszip": [
          "node_modules/jszip/dist/jszip.min.js"
        ]
      },
      "lib": [
        "es2018",
        "dom",
        "dom.iterable"
      ]
    },
     "exclude": [
          "node_modules",
          "**/*.spec.ts"
      ],
  }
  </code></pre>
  
  <p><a href="https://i.stack.imgur.com/bPGEi.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/bPGEi.jpg" alt="error"></a></p>
  
  <p>ADDING my Package.json:</p>
  
  <pre><code>{
    "name": "vnc",
    "version": "0.0.0",
    "scripts": {
      "ng": "ng",
      "start": "ng serve",
      "build": "ng build",
      "test": "jest",
      "lint": "ng lint",
      "e2e": "ng e2e",
      "compodoc": "./node_modules/.bin/compodoc -p src/tsconfig.app.json",
      "generate-docs": "compodoc -p src/tsconfig.app.json",
      "serve-docs": "compodoc -s src/tsconfig.app.json",
      "test:watch": "jest --watch",
      "test:ci": "jest -ci --runInBand"
    },
    "private": true,
    "dependencies": {
      "@angular/animations": "^9.0.0-next.3",
      "@angular/cdk": "^8.1.2",
      "@angular/cli": "^8.3.0",
      "@angular/common": "~9.0.0-next.3",
      "@angular/compiler": "^9.0.0-next.3",
      "@angular/core": "^9.0.0-next.3",
      "@angular/forms": "~9.0.0-next.3",
      "@angular/platform-browser": "~9.0.0-next.3",
      "@angular/platform-browser-dynamic": "~9.0.0-next.3",
      "@angular/router": "~9.0.0-next.3",
      "@briebug/jest-schematic": "^1.7.0",
      "@ng-select/ng-select": "^3.0.6",
      "@ngrx/core": "^1.2.0",
      "@ngrx/data": "^8.2.0",
      "@ngrx/effects": "^8.2.0",
      "@ngrx/router-store": "^8.2.0",
      "@ngrx/store": "^8.0.1",
      "@ngx-translate/core": "^11.0.1",
      "@ngx-translate/http-loader": "^4.0.0",
      "@types/jest": "^24.0.18",
      "angular-calendar": "^0.27.11",
      "bootstrap": "^4.3.1",
      "core-js": "^3.1.4",
      "date-fns": "^1.30.1",
      "jest-createspyobj": "^1.2.2",
      "jquery": "^3.4.1",
      "lodash": "^4.17.11",
      "microsoft-adal-angular6": "^1.3.0",
      "ng2-file-upload": "^1.3.0",
      "ngx-contextmenu": "^5.2.0",
      "node-sass": "^4.12.0",
      "popper.js": "^1.15.0",
      "rxjs": "~6.5.2",
      "simplebar": "^4.1.0",
      "tslib": "^1.10.0",
      "zone.js": "~0.10.0"
    },
    "devDependencies": {
      "@angular-devkit/build-angular": "~0.803.0",
      "@angular/compiler-cli": "^9.0.0-next.3",
      "@angular/language-service": "~9.0.0-next.3",
      "@compodoc/compodoc": "^1.1.9",
      "@ngrx/store-devtools": "^8.0.1",
      "@types/jasminewd2": "~2.0.3",
      "@types/jquery": "^3.3.29",
      "@types/lodash": "^4.14.134",
      "@types/node": "~12.7.1",
      "angular-cli": "^1.0.0-beta.28.3",
      "codelyzer": "^5.0.1",
      "compodoc": "0.0.41",
      "gulp-sass": "^4.0.2",
      "jasmine-core": "~3.4.0",
      "jasmine-spec-reporter": "~4.2.1",
      "jest": "^24.9.0",
      "jest-preset-angular": "7.1.1",
      "ngrx-store-freeze": "^0.2.4",
      "protractor": "~5.4.0",
      "ts-node": "~8.3.0",
      "tslint": "~5.18.0",
      "typescript": "~3.5.3"
    }
  }
  </code></pre>