 class="token punctuation">.</span><span class="token function">levelUp</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>

  assert<span class="token punctuation">.</span><span class="token function">equal</span><span class="token punctuation">(</span>player<span class="token punctuation">.</span><span class="token function">get</span><span class="token punctuation">(</span><span class="token