<!DOCTYPE html>
<html>
<body>
<div></div>
<div></div>
<script src="../../../resources/js-test-pre.js"></script>
<script>
description("Checks that Range.compareBoundaryPoints() throw if the compareHow parameter is invalid");

var range = document.createRange();
range.selectNode(document.getElementsByTagName("div")[0]);
var sourceRange = document.createRange();
sourceRange.selectNode(document.getElementsByTagName("div")[1]);

// Valid values.
shouldBe("range.compareBoundaryPoints(Range.START_TO_START, sourceRange)", "-1");
shouldBe("range.compareBoundaryPoints(Range.START_TO_END, sourceRange)", "-1");
shouldBe("range.compareBoundaryPoints(Range.END_TO_END, sourceRange)", "-1");
shouldBe("range.compareBoundaryPoints(Range.END_TO_START, sourceRange)", "-1");
shouldBe("range.compareBoundaryPoints(65536, sourceRange)", "-1"); // 65536 should wrap around to 0.

// Invalid values.
shouldThrowErrorName("range.compareBoundaryPoints(-1, sourceRange)", "NotSupportedError");
shouldThrowErrorName("range.compareBoundaryPoints(4, sourceRange)", "NotSupportedError");
shouldThrowErrorName("range.compareBoundaryPoints(100, sourceRange)", "NotSupportedError");
shouldThrowErrorName("range.compareBoundaryPoints(65535, sourceRange)", "NotSupportedError");
</script>
<script src="../../../resources/js-test-post.js"></script>
</body>
</html>