canvas.measureText.width returns int sometimes

[andrey-zakharov]

According to MDN: TextMetrics.width is double.
Its true for dart almost all the time. But attached test fails.
width gives 13 as integer for canvas font "13px Roboto" and text "00":

import 'package:test/test.dart';
import 'dart:html';

main() {
  test("TextMetrics.width", () {
    var canvas = document.createElement('canvas');
    var context = canvas.getContext('2d');
    context.font = '13px Roboto';
    expect( context.measureText("test").width.runtimeType, double );
    expect( context.measureText("00").width.runtimeType, double );
  });
}

textmetrics_test.dart.txt

[andrey-zakharov]

It gives me

pub run test -pdartium  test/textmetrics_test.dart 
00:03 +0 -1: TextMetrics.width                                                                     
  Expected: ?:<double>
    Actual: ?:<int>

  package:test                expect
  textmetrics_test.dart 10:5  main.<fn>

00:03 +0 -1: Some tests failed.                

[zoechi]

JavaScript has only double only Dart distinguishes between int and double.
I think this is a dup of ##24882

[kevmoo]

The type of width is num – one shouldn't assume it's either double or int, per @zoechi

https://api.dartlang.org/1.13.0/dart-html/TextMetrics-class.html