Jasmine Matchers not working on Angular 7 and Karma

Hi,

I am trying to make the Jasmine Matchers to work with Angular 7 and Karma, but I am getting this error: Uncaught TypeError: expect(...).toBeTrue is not a function on my spec: expect(result.loginSuccess).toBeTrue();.

I followed the configuration steps on the readme:

• Installed the packages: jasmine-expect, karma-jasmine-matchers and @types/jasmine-expect.
• Added the jasmine matchers to the Karma config:

// Karma configuration file, see link for more information
// https://karma-runner.github.io/1.0/config/configuration-file.html

module.exports = function (config) {
  config.set({
    basePath: '',
    frameworks: ['jasmine', '@angular-devkit/build-angular', 'jasmine-matchers'],
    plugins: [
      require('karma-jasmine'),
      require('karma-chrome-launcher'),
      require('karma-jasmine-html-reporter'),
      require('karma-coverage-istanbul-reporter'),
      require('@angular-devkit/build-angular/plugins/karma'),
      require('karma-jasmine-matchers')
    ],
    client: {
      clearContext: false // leave Jasmine Spec Runner output visible in browser
    },
    coverageIstanbulReporter: {
      dir: require('path').join(__dirname, '../coverage'),
      reports: ['html', 'lcovonly'],
      fixWebpackSourcePaths: true
    },
    reporters: ['progress', 'kjhtml'],
    port: 9876,
    colors: true,
    logLevel: config.LOG_INFO,
    autoWatch: true,
    browsers: ['Chrome'],
    singleRun: false
  });
};

• Added the types to the tsconfig.spec.json file:

{
  "extends": "../tsconfig.json",
  "compilerOptions": {
    "outDir": "../out-tsc/spec",
    "module": "commonjs",
    "types": [
      "jasmine",
      "node",
      "jasmine-expect"
    ]
  },
  "files": [
    "test.ts",
    "polyfills.ts"
  ],
  "include": [
    "**/*.spec.ts",
    "**/*.d.ts"
  ]
}

But I still get an error. Could you help me?

Thanks, Komyg

[jecraig]

I had to add require at the top of my spec class to get this working.

`import ‘jasmine-expect’; // <----- import here import { SessionLogger } from ‘./session-logger’;

describe(‘SessionLogger’, () => { it(‘should have initial value’, () => { expect(SessionLogger.fetch()).toBeEmptyArray(); }); }); `

[komyg]

Hi Jamie,

I think I got it. I added an import to jasmine-matcher in my tests.ts file and the matchers were recognized.

Here is my full file:

// This file is required by karma.conf.js and loads recursively all the .spec and framework files

import 'zone.js/dist/zone-testing';
import { getTestBed } from '@angular/core/testing';
import {
  BrowserDynamicTestingModule,
  platformBrowserDynamicTesting
} from '@angular/platform-browser-dynamic/testing';
import 'jasmine-expect';

declare const require: any;

// First, initialize the Angular testing environment.
getTestBed().initTestEnvironment(
  BrowserDynamicTestingModule,
  platformBrowserDynamicTesting()
);
// Then we find all the tests.
const context = require.context('./', true, /\.spec\.ts$/);
// And load the modules.
context.keys().map(context);

Thanks for the help, Felipe