1 files changed, 28 insertions, 0 deletions
diff --git a/testing/web-platform/tests/html/semantics/embedded-content/media-elements/track/track-element/vtt-cue-float-precision.html b/testing/web-platform/tests/html/semantics/embedded-content/media-elements/track/track-element/vtt-cue-float-precision.html
new file mode 100644
index 0000000000..9cb5824279
--- /dev/null
+++ b/testing/web-platform/tests/html/semantics/embedded-content/media-elements/track/track-element/vtt-cue-float-precision.html
@@ -0,0 +1,28 @@
+<!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>