Unable to locate namespace jasmine in the file /node_modules/angular2/src/testing/matchers.d.ts

Having trouble testing my angular2 app with karma due to a typescript error:

/my/path/node_modules/angular2/src/testing/matchers.d.ts

Error:(4, 37) TS2503: Cannot find namespace 'jasmine'.

All NPM Modules are installed and the typescript compiler is functioning correctly. So, what could be causing this issue?

This is how myservice.serviceSpec.ts looks like:

import {it, describe, expect, beforeEach, inject} from 
'angular2/testing';
import {myService} from "../app/myservice.service";

describe('Tests', () => {
    it('should be true', () => {
        expect(true).toBe(true);
    });
});

Here's what my package.json contains:

{
  "name": "myapp",
  "version": "0.1.0",
  "dependencies": {
    "angular2": "^2.0.0-beta.2",
    "es6-promise": "^3.0.2",
    "es6-shim": "^0.33.13",
    "reflect-metadata": "^0.1.2",
    "rxjs": "^5.0.0-beta.0",
    "systemjs": "^0.19.17",
    "zone.js": "^0.5.10"
  },
  "devDependencies": {
    "jasmine-core": "^2.4.1",
    "karma": "^0.13.19",
    "karma-chrome-launcher": "^0.2.2",
    "karma-coverage": "^0.5.3",
    "karma-jasmine": "^0.3.7",
    "remap-istanbul": "^0.5.1"
  }
}

This is the content of my tsconfig.json file:

{
  "compilerOptions": {
    "target": "ES5",
    "module": "system",
    "moduleResolution": "node",
    "sourceMap": true,
    "emitDecoratorMetadata": true,
    "experimentalDecorators": true,
    "removeComments": false,
    "noImplicitAny": true
  },
  "exclude": [
    "node_modules"
  ]
}

My karma.conf.js configuration:

// Karma configuration
// Generated on Wed Feb 10 2016 09:56:19 GMT+0100 (CET)

module.exports = function (config) {
    config.set ({

        // base path that will be used to resolve all patterns (eg. files, exclude)
        basePath: '',


        // frameworks to use
        // available frameworks: https://npmjs.org/browse/keyword/karma-adapter
        frameworks: ['jasmine'],

        // list of files / patterns to load in the browser
        files: [
            'node_modules/systemjs/dist/system.src.js',
            'node_modules/angular2/bundles/http.dev.js',
            'test/karma_test_shim.js',
            'test/myservice.serviceSpec.js',
            {pattern: 'app/**/*.js', included: false, watched: true},
            {pattern: 'test/**/*Spec.js', included: false, watched: true}
        ],

        // other configurations...

    })
}

This is my karma_test-shim.js script:

// JavaScript code for karma_test-shim.js...
typescriptjasmineangularkarma-jasmine

Answer №1

In order for the compiler to recognize Jasmine's functions, you must have the jasmine.d.ts declaration file. To obtain this file, visit this link and include it in your TypeScript code like so:

/// <reference path="jasmine.d.ts"/>

Answer №2

For me, the problem was resolved by adding "@types/jasmine" via installation.

Answer №3

To integrate Jasmine into your project, simply execute the command below in the root folder:

typings install jasmine --save-dev --ambient

You won't need to include reference paths anymore once this is done.

   

Answer №4

The answer can be found in the angular2 upgrade guide:

To set up your tests, create a new file named test_helper.ts in the test directory and include references to the Jasmine and mock type definitions that were installed previously: test/test_helper.ts

/// <reference path="../typings/jasmine/jasmine.d.ts" />

Answer №5

If you want to experiment, declare jasmine

namespace Experiments {
  let jasmineDeclared: any;
  ///testing
  describe('Experiments', () => {
      it('is a possibility', () => {});
  });
}

Answer №6

I found a solution to the same problem I was facing by using the following import statement:

import * as jasmine from 'jasmine-core';

Just a heads up, Before trying this import statement, ensure that you have installed all the required jasmine packages like jasmine-core.

Similar questions

If you have not found the answer to your question or you are interested in this topic, then look at other similar questions below or use the search

Discovering how to properly run tests on a function within an if statement using Jasmin, Karma

I've recently started unit testing and I'm facing an issue with my component. The component calls a service to display a list of students. getListStudents() { this.noteService.getStudents({}).subscribe(res => { this.students= res })} Then ...

angularunit-testingkarma-jasminekarma-runnerangular7

Organize multiline string based on regex pattern using Javascript

I need to split a multi-line string and group it by a specific regex pattern that repeats throughout the text Some random filler in the beginning of the content Checking against xyz... Text goes here More text and more. Checking against abc... Another se ...

javascripttypescriptgroup-by

Having difficulty accessing certain code in TypeScript TS

Struggling with a TypeScript if else code that is causing errors when trying to access it. The specific error message being displayed is: "Cannot read properties of undefined (reading 'setNewsProvider')" Code Snippet if (this.newsShow != ...

javascriptc#jquerytypescript

Encountering the following issue: Unhandled Promise Rejection - TypeError: Unable to access property 'value' of null after implementing ngAfterViewInit in the code

I'm attempting to display a Google Map using the place_id extracted from an HTML value. activity-details.page.html <ion-col> <div id="map"></div> <div ...

angulartypescripthook

Interactive Legend in Highcharts with checkboxes, event handling, stylish hover effects, and customizable symbol sequencing

I'm currently using Highcharts in a Chart component within my application. I need to make some changes to the Legend, so I delved into the documentation and created functions with Highcharts.wrap(). Initially, the Legend was simple with each legend i ...

javascriptreactjstypescripthighchartsreact-highcharts

Tips for avoiding the error message "Expected 1 arguments, but got 0" when the specified argument is actually `undefined`

Current Typescript Version: 2.6.2 I am in the process of enhancing the type safety of redux beyond what is provided by default typedefs, while also streamlining some of the redundant code. I believe I am edging closer to my desired setup, with just one is ...

typescript

Exploring the functionality of the Angular dist folder after building with multiple projects

In my current Angular project, I've divided the application into three separate applications for improved build time optimization - App1, App2, and App3. When testing locally, I individually build each project and then manually copy the main.js files ...

angularbuild

Configuration and debugging of UI Router

I'm implementing ncy-angular-breadcrumb with UI routes. I have a module dedicated to hosting the UI routes: (function () { var app = angular.module('configurator.uiroutes', ['ui.router', 'ncy-angular-breadcrumb']); ...

javascriptangularjsunit-testingjasmineangular-ui-router

Is it feasible to utilize just one attribute from an external Typescript interface?

Currently, I've incorporated semantic-ui-react into my React project, which provides Typescript typings. Let's take a look at an illustrative type file they offer: Flag.d.ts. import * as React from 'react'; export interface FlagProps ...

typescript

What is the best way to implement Angular translation for multiple values in a typescript file, while also incorporating parameters?

this.snackBar.open( `Only files of size less than ${this.fileSizeAllowed}KB are allowed`, this.translate.instant('USER_REG.close'), { panelClass: 'errorSnackbar', ...

angulartypescriptangular-translate

Experiencing issues with ng new while attempting to generate a fresh application

Recently, I attempted to generate a fresh Angular app using the command ng new. However, even after all the essential files were created, it got stuck at the message installing packages.... I waited patiently for 10 minutes but still, it showed installing ...

angular

TimeStamp Recorder - Typescript

I'm trying to create a timer that counts the time when a button is pressed. Currently, I have managed to display the minutes and seconds on the screen as soon as the button is clicked. For example: 21(min):02(sec) What I am struggling with is updati ...

javascriptangulartypescript

Preventing data loss in an Ionic array - encountering issues with using this.array.push

When attempting to use the storage get method to fill the array storedArr = [], I encounter the error message .push is not a function: storedArr = this.storage.get('stored') ? this.storage.get('stored').then((e) => {e}) : []; The c ...

arraysangulartypescriptionic-frameworkstorage

Enhance Leaflet Marker functionality using Typescript

I am currently tackling a project that involves using Typescript and Leaflet. Traditionally, to extend the leaflet marker in JavaScript, it is done like this: L.Marker.Foo = L.Marker.extend({...}); But when I attempt to do this in Typescript, I encounter ...

typescriptleaflet

The Observable becomes null upon invocation of the unsubscribe function

Seeking assistance in creating an observable that retrieves data in a specific format. getRootGroupNodes(): Observable<Group[]> { return Observable.create(function(observer) { var groups = [ { groupName: "Group1" }, ...

angulartypescriptrxjsrxjs5

I don't understand why I'm receiving the error message "Unsafe assignment of an `any` value" when I clearly defined the value as a string with a default value

I am puzzled by the 2 eslint errors in this code snippet. The property is declared as a string with a default value: export default { name: '...', props: { x: { type: String, required: true, default: '' } ...

typescriptvuejs3eslint

Can you explain how to invoke a class with express().use function?

Currently, I am delving into learning Node JS with TypeScript but have hit a roadblock with a particular issue. In my app.ts file, I have initialized the express and attempted to call the router class inside the app.use() method, only to encounter an error ...

javascriptnode.jstypescriptexpress

Having difficulty setting up Firebase Callable Function Emulator configuration

Currently, I am integrating callable functions into an existing Angular/Firebase project. Despite following what I believe to be the correct configuration standards, the project is still accessing the production endpoints, resulting in a CORS exception. H ...

angularfirebasegoogle-cloud-functionsfirebase-tools

Utilize Regular Expression Constant Validator in Angular 8's Reactive Formbuilder for efficient data validation requirements

Is there a way to efficiently store and reuse a Regex Validator pattern in Angular while following the DRY principle? I have a reactive formbuilder with a Regex validator pattern for ZipCode that I need to apply to multiple address forms. I'm interes ...

angulartypescriptangular-reactive-formsangular8

Using ngFor and ngModel: What is the best way to add values to the beginning of the array I am looping through?

I am facing an issue with my array of elements in which users can edit, add, and delete complete array elements. Everything works smoothly until I try to add a value to the beginning of the array using the unshift method. Below is a test that showcases th ...

javascriptangularangular-forms