[SalesForce] Need to preview a Lightning Component

My problem is I just want to preview a Lightning component in the developer console. There are a ton of ways to make lightning components in all sorts of other mediums, but I just want to click preview and see it. I believe I need to have a "dummy" lightning app to host it. An outline of what I have now is for the Component called "testApp.cmp"

<aura:component implements="force:appHostable">
////code
<h1>hello world, please display this</h1>
</aura:component>

and the Lightning App called "testApp.app":

<aura:application access="GLOBAL" extends="ltng:outApp"> 
   <aura:dependency resource="c.testApp"/>
</aura:application>

Best Answer

Having a dummy app for the purpose of previewing is typically what I do. You don't need Lightning Out for this, though. Just put the component directly in the app:

<aura:application extends="force:slds">
  <c:helloWorld />
</aura:application>
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