<!doctype html>
<script src="../../resources/testharness.js"></script>
<script src="../../resources/testharnessreport.js"></script>
<style>
  svg { background-color: lightblue }
  div { width: 500px; background-color: blue; padding: 1em }
</style>
<div>
  <svg viewBox="0 0 100 100"></svg>
</div>
<script>
    var dec_test = async_test("Test SVG dimensions after container width has shrunk");
    var inc_test = async_test("Test SVG dimensions after container width has grown");
    onload = function() {
        requestAnimationFrame(function() {
            document.querySelector('div').style.width = "1000px";
            inc_test.step(function() {
                var rect = document.querySelector('svg').getBoundingClientRect();
                assert_equals(rect.width, 1000);
                assert_equals(rect.height, 1000);
            });
            inc_test.done();
            document.querySelector('div').style.width = "100px";
            dec_test.step(function() {
                var rect = document.querySelector('svg').getBoundingClientRect();
                assert_equals(rect.width, 100);
                assert_equals(rect.height, 100);
            });
            dec_test.done();
        });
    };
</script>