Upgrade Chai to 5.x (#6197)

package.json

@@ -120,13 +120,12 @@
     "@rollup/plugin-terser": "^0.4.4",
     "@rollup/pluginutils": "^5.1.0",
     "c8": "^9.1.0",
-    "chai": "^4.3.10",
+    "chai": "^5.1.0",
     "eslint": "^8.57.0",
     "fflate": "^0.8.2",
     "global-jsdom": "^24.0.0",
     "jsdom": "^24.0.0",
     "karma": "^6.4.3",
-    "karma-chai": "^0.1.0",
     "karma-chrome-launcher": "^3.2.0",
     "karma-mocha": "^2.0.1",
     "karma-sinon": "^1.0.5",

tests/karma.conf.cjs

@@ -9,6 +9,8 @@ module.exports = function (config) {
 
         // list of files / patterns to load in the browser
         files: [
+            { pattern: 'node_modules/chai/chai.js', type: 'module' },
+            { pattern: 'tests/setup.js', type: 'module' },
             'build/playcanvas.js',
 
             // test files - change this to a specific file in order to run a single suite
@@ -37,11 +39,10 @@ module.exports = function (config) {
 
         // frameworks to use
         // available frameworks: https://npmjs.org/browse/keyword/karma-adapter
-        frameworks: ['mocha', 'chai', 'sinon'],
+        frameworks: ['mocha', 'sinon'],
 
         plugins: [
             'karma-mocha',
-            'karma-chai',
             'karma-sinon',
             'karma-chrome-launcher',
             'karma-spec-reporter'

tests/setup.js

@@ -0,0 +1,3 @@
+import { expect } from '../node_modules/chai/chai.js';
+
+window.expect = expect;