title: Test-AzureRmResourceGroupDeployment cmdlet returns Empty when the validation is successful
body: <p>I use the Azure Powershell cmdlet below to validate both the ARM template json and ARM template params json files.</p>
  
  <pre><code>$result = Test-AzureRmResourceGroupDeployment -ResourceGroupName TestRG -TemplateFile TestARMTemplate.json -ApiVersion TestARMParams.json
  </code></pre>
  
  <p>I expect the cmdlet to return <strong>true</strong> (boolean type) if both input arguments are valid.</p>
  
  <p>However, the result is empty.</p>
  
  <p>The documentation is also not clear on the expected response of this cmdlet.</p>
  
  <p>I would like to know whether the response I got is an expected response or not.</p>
  
  <p>Note: I am using <strong>Azure PowerShell version 1.5 (June 2016)</strong> on Windows 10 machine.</p>