[BUG]: update table rules when a table element takes a role rather than "table" role

[shunguoy]

Project

accessibility-checker-engine

Browser

No response

Operating system

No response

Description

A <table> element can take any role based on ARIA in HTML spec. When a native <table> element takes a role other than a "table" role, the table is no longer a table anymore, and the requirements for this non-table ARIA role should not follow the native table-element rules, but rather the overriding ARIA role specified by the author rules.

For example, the following violations might be false positives when AIRA role = "non-table":

• Table has no headers identified, reported by table_headers_exists rule.
• "An explicit ARIA 'role' is not valid for <tr> element within an ARIA role 'xxx' per the ARIA in HTML specification" by table_aria_descendants rule.

Steps to reproduce

Refer to ACT test case for an example.

[philljenkins]

@shunguoy I tweaked the description

[shunguoy]

Triage: need to revisit: table_ariadescendant, table_caption, table_headers, table_summary
but table_layout, table_scope, table_structure are fine.

No issue was reported from IBM cloud or Carbon, except one from a legacy app using Dojo.