TOC
sg-until
continuously calls a function every 100ms until it returns truthy.
var counter = 0;
until( function () {
counter++;
if ( counter === 5 ) return 'chicken';
}, function ( _error, _result ) {
should( _error ).equal( null );
_result.should.eql( 'chicken' );
_done();
} );
should wait for about 3 seconds.
var started = new Date().getTime(),
timesChecked = 0;
until( function () {
timesChecked++;
return new Date().getTime() - started > 500;
}, function () {
( new Date().getTime() - started ).should.be.greaterThan( 500 );
timesChecked.should.be.greaterThan( ( 500 / 100 * .8 ) );
_done();
} );
should wait for about 3 seconds but check every 10 milliseconds.
var started = new Date().getTime(),
timesChecked = 0;
until( function () {
timesChecked++;
return new Date().getTime() - started > 500;
}, function () {
( new Date().getTime() - started ).should.be.greaterThan( 500 );
timesChecked.should.be.greaterThan( 500 / 10 * .8 );
_done();
}, 10 );
should stop checking if an error is returned.
var timesChecked = 0;
until( function () {
timesChecked++;
if ( timesChecked === 5 ) return new Error( '5 is odd' );
}, function ( _error ) {
_error.should.be.an.Error;
_done();
} );
should timeout if specified.
var timeout = 1000;
until( function () {
return false;
}, function ( _error ) {
_error.should.be.an.Error;
/timed out/i.test( _error.message );
_done();
}, 100, timeout );