Example of spec that covers testing of NgForm.

// BROWSER TESTING SHIM
// Keep it in-sync with what karma-test-shim does
/*global jasmine, __karma__, window*/
(function () {

Error.stackTraceLimit = 0; // "No stacktrace"" is usually best for app testing.

// Uncomment to get full stacktrace output. Sometimes helpful, usually not.
// Error.stackTraceLimit = Infinity; //

jasmine.DEFAULT_TIMEOUT_INTERVAL = 3000;

var baseURL = document.baseURI;
baseURL = baseURL + baseURL[baseURL.length-1] ? '' : '/';

System.config({
  baseURL: baseURL,
  // Extend usual application package list with test folder
  packages: { 'testing': { main: 'index.js', defaultExtension: 'js' } },

  // Assume npm: is set in `paths` in systemjs.config
  // Map the angular testing umd bundles
  map: {
    '@angular/core/testing': 'npm:@angular/core/bundles/core-testing.umd.js',
    '@angular/common/testing': 'npm:@angular/common/bundles/common-testing.umd.js',
    '@angular/compiler/testing': 'npm:@angular/compiler/bundles/compiler-testing.umd.js',
    '@angular/platform-browser/testing': 'npm:@angular/platform-browser/bundles/platform-browser-testing.umd.js',
    '@angular/platform-browser-dynamic/testing': 'npm:@angular/platform-browser-dynamic/bundles/platform-browser-dynamic-testing.umd.js',
    '@angular/http/testing': 'npm:@angular/http/bundles/http-testing.umd.js',
    '@angular/router/testing': 'npm:@angular/router/bundles/router-testing.umd.js',
    '@angular/forms/testing': 'npm:@angular/forms/bundles/forms-testing.umd.js',
  },
});

System.import('systemjs.config.js')
  .then(importSystemJsExtras)
  .then(initTestBed)
  .then(initTesting);

/** Optional SystemJS configuration extras. Keep going w/o it */
function importSystemJsExtras(){
  return System.import('systemjs.config.extras.js')
  .catch(function(reason) {
    console.log(
      'Note: System.import could not load "systemjs.config.extras.js" where you might have added more configuration. It is an optional file so we will continue without it.'
    );
    console.log(reason);
  });
}

function initTestBed(){
  return Promise.all([
    System.import('@angular/core/testing'),
    System.import('@angular/platform-browser-dynamic/testing')
  ])

  .then(function (providers) {
    var coreTesting    = providers[0];
    var browserTesting = providers[1];

    coreTesting.TestBed.initTestEnvironment(
      browserTesting.BrowserDynamicTestingModule,
      browserTesting.platformBrowserDynamicTesting());
  })
}

// Import all spec files defined in the html (__spec_files__)
// and start Jasmine testrunner
function initTesting () {
  console.log('loading spec files: '+__spec_files__.join(', '));
  return Promise.all(
    __spec_files__.map(function(spec) {
      return System.import(spec);
    })
  )
  //  After all imports load,  re-execute `window.onload` which
  //  triggers the Jasmine test-runner start or explain what went wrong
  .then(success, console.error.bind(console));

  function success () {
    console.log('Spec files loaded; starting Jasmine testrunner');
    window.onload();
  }
}

})();

/** App specific SystemJS configuration */
System.config({
  packages: {
    // barrels
    'app/model': {main: "index.ts", defaultExtension: "ts"},
    'app/model/testing': {main: "index.ts", defaultExtension: "ts"}
  }
});

h1 { color: green; font-size: 350%}

import { Component, ViewChild } from '@angular/core';
import { NgForm } from "@angular/forms";

@Component({
  selector: 'app-form',
  templateUrl: './form.component.html',
  styleUrls:  ['./form.component.css']
})
export class FormComponent  {
  
  @ViewChild("form") form: NgForm;
  
  // Just for demonstration purposes
  submitted = undefined;
  
  onSubmit() {
    
    if (this.form.controls.username.valid && this.form.controls.password.valid) {
      this.submitted = true;
    } else {
      this.submitted = false;
    }
    
  };
    
}

import { async, fakeAsync, tick, ComponentFixture, TestBed } from '@angular/core/testing';
import { FormsModule } from '@angular/forms';
import { FormComponent } from './form.component';

describe('FormComponent ', () => {

  let comp:    FormComponent;
  let fixture: ComponentFixture<FormComponent>;
  let de:      DebugElement;
  let el:      HTMLElement; 

  // async beforeEach
  beforeEach(async(() => {
    TestBed.configureTestingModule({
      imports: [FormsModule ],
      declarations: [ FormComponent ], // declare the test component
    })
    .compileComponents();  // compile template and css
  }));

  // synchronous beforeEach
  beforeEach(() => {
    fixture = TestBed.createComponent(FormComponent);

    comp = fixture.componentInstance; // FormComponent test instance
  }); 

  it('testing form the wrong way', () => {
    
    fixture.detectChanges();
    
    comp.onSubmit();
     
    expect(comp.submitted).toEqual(false);
  });
  
  it('testing form the proper way', fakeAsync(() => {

    // This first detectChanges is necessary to properly set up the form
    fixture.detectChanges();

    // Tick needs to be called in order for form controls to be registered properly.
    tick();
    
    comp.onSubmit();
    
    expect(comp.submitted).toEqual(false);

  }));


});

<h1>Form Spec Example</h1>

<form (ngSubmit)="onSubmit()" #form="ngForm">

    <input id="username"
         ngModel
         required
         type="text"
         name="username"
         placeholder="Username">
         
    <input id="password"
         ngModel
         required
         type="password"
         name="password"
         placeholder="Password">
    
    <input id="submitButton" class="btn btn-success btn-block" type="submit" value="Login">
    
</form>

<!-- Run application specs in a browser -->
<!DOCTYPE html>
<html>
<head>
  <script>document.write('<base href="' + document.location + '" />');</script>
  <title>Form Component Specs</title>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/jasmine/2.4.1/jasmine.css">
</head>
<body>
  <!-- Polyfills -->
  <script src="https://unpkg.com/core-js/client/shim.min.js"></script>

  <script src="https://unpkg.com/systemjs@0.19.39/dist/system.src.js"></script>

  <script src="https://cdnjs.cloudflare.com/ajax/libs/jasmine/2.4.1/jasmine.js"></script>
  <script src="https://cdnjs.cloudflare.com/ajax/libs/jasmine/2.4.1/jasmine-html.js"></script>
  <script src="https://cdnjs.cloudflare.com/ajax/libs/jasmine/2.4.1/boot.js"></script>

  <script src="https://unpkg.com/zone.js@0.7.4?main=browser"></script>
  <script src="https://unpkg.com/zone.js/dist/long-stack-trace-zone.js?main=browser"></script>
  <script src="https://unpkg.com/zone.js/dist/proxy.js?main=browser"></script>
  <script src="https://unpkg.com/zone.js/dist/sync-test.js?main=browser"></script>
  <script src="https://unpkg.com/zone.js/dist/jasmine-patch.js?main=browser"></script>
  <script src="https://unpkg.com/zone.js/dist/async-test.js?main=browser"></script>
  <script src="https://unpkg.com/zone.js/dist/fake-async-test.js?main=browser"></script>

  <script>
    var __spec_files__ = [
      'app/form.component.spec'
    ];
  </script>
  <script src="browser-test-shim.js"></script>
</body>

</html>

/**
 * WEB ANGULAR VERSION
 * (based on systemjs.config.js in angular.io)
 * System configuration for Angular samples
 * Adjust as necessary for your application needs.
 */
(function (global) {
  System.config({
    // DEMO ONLY! REAL CODE SHOULD NOT TRANSPILE IN THE BROWSER
    transpiler: 'ts',
    typescriptOptions: {
      // Copy of compiler options in standard tsconfig.json
      "target": "es5",
      "module": "commonjs",
      "moduleResolution": "node",
      "sourceMap": true,
      "emitDecoratorMetadata": true,
      "experimentalDecorators": true,
      "lib": ["es2015", "dom"],
      "noImplicitAny": true,
      "suppressImplicitAnyIndexErrors": true
    },
    meta: {
      'typescript': {
        "exports": "ts"
      }
    },
    paths: {
      // paths serve as alias
      'npm:': 'https://unpkg.com/'
    },
    // map tells the System loader where to look for things
    map: {
      // our app is within the app folder
      'app': 'app',

      // angular bundles
      '@angular/animations': 'npm:@angular/animations/bundles/animations.umd.js',
      '@angular/animations/browser': 'npm:@angular/animations/bundles/animations-browser.umd.js',
      '@angular/core': 'npm:@angular/core/bundles/core.umd.js',
      '@angular/common': 'npm:@angular/common/bundles/common.umd.js',
      '@angular/common/http': 'npm:@angular/common/bundles/common-http.umd.js',
      '@angular/compiler': 'npm:@angular/compiler/bundles/compiler.umd.js',
      '@angular/platform-browser': 'npm:@angular/platform-browser/bundles/platform-browser.umd.js',
      '@angular/platform-browser/animations': 'npm:@angular/platform-browser/bundles/platform-browser-animations.umd.js',
      '@angular/platform-browser-dynamic': 'npm:@angular/platform-browser-dynamic/bundles/platform-browser-dynamic.umd.js',
      '@angular/http': 'npm:@angular/http/bundles/http.umd.js',
      '@angular/router': 'npm:@angular/router/bundles/router.umd.js',
      '@angular/router/upgrade': 'npm:@angular/router/bundles/router-upgrade.umd.js',
      '@angular/forms': 'npm:@angular/forms/bundles/forms.umd.js',
      '@angular/upgrade': 'npm:@angular/upgrade/bundles/upgrade.umd.js',
      '@angular/upgrade/static': 'npm:@angular/upgrade/bundles/upgrade-static.umd.js',

      // other libraries
      'rxjs':                      'npm:rxjs@5.0.1',
      'tslib':                     'npm:tslib/tslib.js',
      'angular-in-memory-web-api': 'npm:angular-in-memory-web-api@0.4/bundles/in-memory-web-api.umd.js',
      'ts':                        'npm:plugin-typescript@5.2.7/lib/plugin.js',
      'typescript':                'npm:typescript@2.3.2/lib/typescript.js',

    },
    // packages tells the System loader how to load when no filename and/or no extension
    packages: {
      app: {
        main: './main.ts',
        defaultExtension: 'ts',
        meta: {
          './*.ts': {
            loader: 'systemjs-angular-loader.js'
          }
        }
      },
      rxjs: {
        defaultExtension: 'js'
      }
    }
  });

})(this);

var templateUrlRegex = /templateUrl\s*:(\s*['"`](.*?)['"`]\s*)/gm;
var stylesRegex = /styleUrls *:(\s*\[[^\]]*?\])/g;
var stringRegex = /(['`"])((?:[^\\]\\\1|.)*?)\1/g;

module.exports.translate = function(load){
  if (load.source.indexOf('moduleId') != -1) return load;

  var url = document.createElement('a');
  url.href = load.address;

  var basePathParts = url.pathname.split('/');

  basePathParts.pop();
  var basePath = basePathParts.join('/');

  var baseHref = document.createElement('a');
  baseHref.href = this.baseURL;
  baseHref = baseHref.pathname;

  if (!baseHref.startsWith('/base/')) { // it is not karma
    basePath = basePath.replace(baseHref, '');
  }

  load.source = load.source
    .replace(templateUrlRegex, function(match, quote, url){
      var resolvedUrl = url;

      if (url.startsWith('.')) {
        resolvedUrl = basePath + url.substr(1);
      }

      return 'templateUrl: "' + resolvedUrl + '"';
    })
    .replace(stylesRegex, function(match, relativeUrls) {
      var urls = [];

      while ((match = stringRegex.exec(relativeUrls)) !== null) {
        if (match[2].startsWith('.')) {
          urls.push('"' + basePath + match[2].substr(1) + '"');
        } else {
          urls.push('"' + match[2] + '"');
        }
      }

      return "styleUrls: [" + urls.join(', ') + "]";
    });

  return load;
};