test_experimental_b/
lib.rs

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pub fn add( left : usize, right : usize ) -> usize
{
  left + right
}

#[ cfg( test ) ]
mod tests
{
  use super::*;

  #[ test ]
  fn it_works()
  {
    let result = add( 2, 2 );
    assert_eq!( result, 4 );
  }
}