vtt-cue-float-precision.html

Enable keyboard shortcuts

This WPT test may be referenced by the following Test IDs:
- /html/semantics/embedded-content/media-elements/track/track-element/vtt-cue-float-precision.html - WPT Dashboard Interop Dashboard

<!doctype html>

<title>Float precision of VTTCue attributes line, position and size</title>

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

<div id=log></div>

<script>

test(function() {

    var cue = new VTTCue(0, 1, 'text');

    // Assign a value which is exactly representable as double but not float.

    var doubleValue = 1.000000000000004;

    cue.line = doubleValue;

    assert_equals(cue.line, doubleValue);

    cue.position = doubleValue;

    assert_equals(cue.position, doubleValue);

    cue.size = doubleValue;

    assert_equals(cue.size, doubleValue);

    // Assign a value which is exactly representable as float but is non-integral.

    var floatValue = 1.5;

    cue.line = floatValue;

    assert_equals(cue.line, floatValue);

    cue.position = floatValue;

    assert_equals(cue.position, floatValue);

    cue.size = floatValue;

    assert_equals(cue.size, floatValue);

}, document.title+', stored as floats');

</script>