title: Force-failing a Jasmine test
body: <p>If I have code in a test that should never be reached (for example the <code>fail</code> clause of a promise sequence), how can I force-fail the test?</p>
  
  <p>I use something like <code>expect(true).toBe(false);</code> but this is not pretty.</p>
  
  <p>The alternative is waiting for the test to timeout, which I want to avoid (because it is slow).</p>