Only change aria-pressed if it's not an input-based radio or checkbox group

* Only change aria-pressed if it's not an input-based radio or checkbox group

aria-pressed="true"/aria-pressed="false" is really only useful for
making on/off toggles out of, say, `<button>` elements. the attribute is
useless (and potentially confusing/conflicting) on, say, `<label>`
elements for an existing `<input type="radio">` or similar.

* Add unit test for buttons.js and radio/checkbox inputs in button groups

1 files changed, 6 insertions, 2 deletions

diff --git a/js/src/button.js b/js/src/button.js
index 76c5cdd15f..6295d0db05 100644
--- a/js/src/button.js
+++ b/js/src/button.js
@@ -66,6 +66,7 @@ const Button = (($) => {
 
     toggle() {
       let triggerChangeEvent = true
+      let addAriaPressed = true
       const rootElement      = $(this._element).closest(
         Selector.DATA_TOGGLE
       )[0]
@@ -94,12 +95,15 @@ const Button = (($) => {
           }
 
           input.focus()
+          addAriaPressed = false
         }
 
       }
 
-      this._element.setAttribute('aria-pressed',
-        !$(this._element).hasClass(ClassName.ACTIVE))
+      if (addAriaPressed) {
+        this._element.setAttribute('aria-pressed',
+          !$(this._element).hasClass(ClassName.ACTIVE))
+      }
 
       if (triggerChangeEvent) {
         $(this._element).toggleClass(ClassName.ACTIVE)