function basic1( key , lookup , shouldFail){
    var m = new Map();
    m.put( key , 17 );
    
    var out = m.get( lookup || key );

    if ( ! shouldFail ){
        assert.eq( 17 , out , "basic1 missing: " + tojson( key ) );
    }
    else {
        assert.isnull( out , "basic1 not missing: " + tojson( key ) ); 
    }

}

basic1( 6 )
basic1( new Date() )
basic1( "eliot" )
basic1( { a : 1 } );
basic1( { a : 1 , b : 1 } )
basic1( { a : 1 } , { b : 1 } , true ) 
basic1( { a : 1 , b : 1 } , { b : 1 , a : 1 } , true )
basic1( { a : 1 } , { a : 2 } , true );