title: Angular 5 using material, jasmine karma test fail with mat-icon
body: <p>I'm trying to run jasmine karma  with</p>
  
  <pre><code>ng test
  </code></pre>
  
  <p>Surprise with all the issues with Angular Materials.   I see example of OLDER version of material many months ago when it was called <code>md-icon</code> instead of <code>mat-icon</code> etc...</p>
  
  <p>Thus this doesn't fix the errors thrown </p>
  
  <pre><code>MaterialModule.forRoot()
  </code></pre>
  
  <p>Error</p>
  
  <blockquote>
    <p>mat-icon is not a known element  angular material</p>
  </blockquote>