tree 4e7bdae0c4493269bd03b81e90cde56a8acc63d3
parent 25dba84cf7cae753d192f470d82c457bfcdb4290
author Seokho Song <0xdevssh@gmail.com> 1617802624 -0700
committer Blink WPT Bot <blink-w3c-test-autoroller@chromium.org> 1617804021 -0700

CSSNumericValue.add and sub must throw TypeException when type different

According to the spec [1], CSSNumericValue.add must throw the exception
on types are different. CSSNumericValue.sub uses CSSMathSum
with negating, So it is samely required throw the exception.

Therefore, add ThrowTypeErrorIfValueIsNull() helper function
which receive the value and exception_state for throw TypeException
after checking the value is nullptr.

[1] https://drafts.css-houdini.org/css-typed-om-1/#dom-cssnumericvalue-add

Bug: 1193923
Change-Id: Ic131e641d2e3251d119eca04a0ce55f194596710
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2798149
Commit-Queue: Seokho Song <0xdevssh@gmail.com>
Reviewed-by: Mason Freed <masonf@chromium.org>
Reviewed-by: Rune Lillesveen <futhark@chromium.org>
Cr-Commit-Position: refs/heads/master@{#869972}