[Fix] jsx-no-literals: properly handle HTML entities when allowed

When an HTML entity such as — is checked with ESLint, the `value`
property becomes the actual unicode character instead of the raw
literal.

This means if `—` is in the allowed strings array, and `—`
is in the code being checked, the actual value used in the JSXText check
will be `—`, which will not match against `—`, so it causes a
false positive error.

When checking against the set of allowed strings, this will now check
both the `value` and the `raw` properties of the node. For `—`, the
`raw` property will still be `—`.

If _either_ of these match the list of allowed values, then no error
will be returned.

Fixes #3130

Co-authored-by: Joe Attardi <attardi@synopsys.com>
Co-authored-by: Ross <52366381+ROSSROSALES@users.noreply.github.com>

lib/rules/jsx-no-literals.js

@@ -89,9 +89,11 @@ module.exports = {
     }
 
     function getValidation(node) {
-      if (config.allowedStrings.has(trimIfString(node.value))) {
+      const values = [trimIfString(node.raw), trimIfString(node.value)];
+      if (values.some((value) => config.allowedStrings.has(value))) {
         return false;
       }
+
       const parent = getParentIgnoringBinaryExpressions(node);
 
       function isParentNodeStandard() {

tests/lib/rules/jsx-no-literals.js

@@ -284,6 +284,18 @@ ruleTester.run('jsx-no-literals', rule, {
         <img alt='blank image'></img>
       `,
     },
+    {
+      code: `
+        <div>&mdash;</div>
+      `,
+      options: [{ noStrings: true, allowedStrings: ['&mdash;', '—'] }],
+    },
+    {
+      code: `
+        <div>—</div>
+      `,
+      options: [{ noStrings: true, allowedStrings: ['&mdash;', '—'] }],
+    },
   ]),
 
   invalid: parsers.all([