title: Passing additional arguments to tests with ScalaTest
body: <p>Currently I'm using IntelliJ Idea 15 and Scalatest framework to  make some unit tests. And I need to pass my own arguments into test and somehow read them from code. For instance:
  Suppose I have such class</p>
  
  <pre><code>class Test extends FunSuite {
     test("Some test") {
         val arg = // here I want to get an argument which I want to pass. Something like args("arg_name")
         println(arg)
         assert(2 == 2)
     }
  }
  </code></pre>
  
  <p>And to run the test with argument I want to do something like</p>
  
  <pre><code>test -arg_name=blabla
  </code></pre>
  
  <p>So, the question is how to pass this an argument and how to obtain it. </p>