ACT 23a2a8 Image has non-empty accessible name: Pass 6 & 7 test cases do not follow ARIA in HTML spec

[philljenkins]

https://www.w3.org/WAI/standards-guidelines/act/rules/23a2a8/#test-cases

• Pass Example 6
  <img role="presentation" style="width:72px; height:48px; background-image: url(/test-assets/shared/background.png)" />
• Pass Example 7
  <img role="none" src="/test-assets/shared/background.png" />

These test cases do not follow the latest spec in ARIA in HTML https://www.w3.org/TR/html-aria/ (see screenshot below)
which says that

• img without an alt attribute, then No aria-* attributes allowed except aria-hidden="true"
• role=" presentation is only allowed when alt="" is also provided
• img without an alt attribute, then No role other than img, so "presentation" or "none" would not be valid in the test cases
• img with alt="some text" allows many roles, none of which include "presentation" or "none"

So, either the spec needs to change or test cases 6 & 7 need to change.

Background - Equal Access Accessibility Checker

The Checker rules "aria_role_valid" and "img_alt_valid" currently fail both of these test cases with a couple of issue messages each:

• The image has neither an alt attribute nor an ARIA label or title
• ARIA roles must be valid for the element to which they are assigned
• • The ARIA role none is not valid for the element <img>
• • The ARIA role presentation is not valid for the element <img> and may be ignored by the browser since the element may be focusable

The help guidance for "aria_role_valid" says:

What to do

• If a native HTML element fits the intended behavior, use that instead of adding ARIA markup;
• Or, update the role on the element using the guidance in the Document conformance requirements for use of "ARIA" attributes in HTML section of the ARIA in HTML specification. This reference provides details of valid ARIA markup on native HTML elements.

ARIA in HTML https://www.w3.org/TR/html-aria/ (see screenshot below)

[philljenkins]

Close this issue as dup of act-rules/act-rules.github.io#2062