From 598277ecde6e55610af3a148f33777c8d7613454 Mon Sep 17 00:00:00 2001
From: Torleif Berger <torleif@outlook.com>
Date: Wed, 29 Jan 2020 12:16:40 +0100
Subject: [PATCH] [New] `jsx-pascal-case`: Support unicode characters

Fixes #1654
---
 lib/rules/jsx-pascal-case.js       | 8 ++++++--
 package.json                       | 3 ++-
 tests/lib/rules/jsx-pascal-case.js | 6 +++++-
 3 files changed, 13 insertions(+), 4 deletions(-)

diff --git a/lib/rules/jsx-pascal-case.js b/lib/rules/jsx-pascal-case.js
index 43472c4067..e6e1339cc2 100644
--- a/lib/rules/jsx-pascal-case.js
+++ b/lib/rules/jsx-pascal-case.js
@@ -6,6 +6,7 @@
 'use strict';
 
 const elementType = require('jsx-ast-utils/elementType');
+const XRegExp = require('xregexp');
 const docsUrl = require('../util/docsUrl');
 const jsxUtil = require('../util/jsx');
 
@@ -13,8 +14,11 @@ const jsxUtil = require('../util/jsx');
 // Constants
 // ------------------------------------------------------------------------------
 
-const PASCAL_CASE_REGEX = /^(.*[.])*([A-Z]|[A-Z]+[a-z0-9]+(?:[A-Z0-9]+[a-z0-9]*)*)$/;
-const ALL_CAPS_TAG_REGEX = /^[A-Z0-9]+([A-Z0-9_]*[A-Z0-9]+)?$/;
+// eslint-disable-next-line no-new
+const hasU = (function hasU() { try { new RegExp('o', 'u'); return true; } catch (e) { return false; } }());
+
+const PASCAL_CASE_REGEX = XRegExp('^(.*[.])*([\\p{Lu}]|[\\p{Lu}]+[\\p{Ll}0-9]+(?:[\\p{Lu}0-9]+[\\p{Ll}0-9]*)*)$', hasU ? 'u' : '');
+const ALL_CAPS_TAG_REGEX = XRegExp('^[\\p{Lu}0-9]+([\\p{Lu}0-9_]*[\\p{Lu}0-9]+)?$', hasU ? 'u' : '');
 
 // ------------------------------------------------------------------------------
 // Rule Definition
diff --git a/package.json b/package.json
index 46ee88f440..7a440dfa71 100644
--- a/package.json
+++ b/package.json
@@ -37,7 +37,8 @@
     "object.values": "^1.1.1",
     "prop-types": "^15.7.2",
     "resolve": "^1.14.2",
-    "string.prototype.matchall": "^4.0.2"
+    "string.prototype.matchall": "^4.0.2",
+    "xregexp": "^4.2.4"
   },
   "devDependencies": {
     "@types/eslint": "^6.1.3",
diff --git a/tests/lib/rules/jsx-pascal-case.js b/tests/lib/rules/jsx-pascal-case.js
index 68f0806780..8428783818 100644
--- a/tests/lib/rules/jsx-pascal-case.js
+++ b/tests/lib/rules/jsx-pascal-case.js
@@ -47,7 +47,11 @@ ruleTester.run('jsx-pascal-case', rule, {
   }, {
     code: '<T3StComp0Nent />'
   }, {
-    code: '<T />'
+    code: '<Éurströmming />'
+  }, {
+    code: '<Año />'
+  }, {
+    code: '<Søknad />'
   }, {
     code: '<T />',
     parser: parsers.BABEL_ESLINT