var something;

TEST('read scope', function()
{
    var a;
    a = 3;

    // 1
    var fn_1 = function(a){
        return a;
    };

    assert( fn_1(42) === something );

    // 2
    var fn_2 = function(b){
        return a;
    };

    assert( fn_2(42) === something );

    // 3
    var fn_3 = function(b){
        var a = b - 10;
        return a;
    };

    assert( fn_3(42) === something );
});


TEST('assign scope', function()
{
    var a;

    // 1
    var fn_1 = function(a){
        a = 5;
    };

    a = 3;
    fn_1(42);
    assert( a === something );

    // 2
    var fn_2 = function(b){
        a = 5;
    };

    a = 3;
    fn_2(42);
    assert( a === something );

    // 3
    var fn_3 = function(b){
        var a = b;
    };

    a = 3;
    fn_3(42);
    assert( a === something );

    // 4
    var fn_4 = function(b){
        a = b;
    };

    a = 3;
    fn_4(42);
    assert( a === something );
});


TEST('function body', function()
{
    var a;
    var b;

    var fn_1 = function(c){
        // Please write your answer here.
    };

    a = 3;
    b = fn_1(5);
    assert( a === 5);
    assert( b === 3 * 5 );

});