@prefix : <foo.n3#> .
     @prefix log: <http://www.w3.org/2000/10/swap/log#> .
     @prefix os: <http://www.w3.org/2000/10/swap/os#> .
    
    @forAll :x .
    
    :test_param_1     :is "TEST_VALUE_1" .
    {
        "TEST_PARAMETER_1"     os:environ :x .
        
        }     log:implies {:test_param_1     :is :x .
        } .
    {
        "THIS_gotta_BE_undefined"     os:environ :x .
        
        }     log:implies {:test2     a :FAILURE .
        } .