fix: Update test configuration for Angular 15 compatibility

  - Replace require.context with explicit spec imports to fix webpack issues
  - Add lcov reporter to karma configuration

Author: t-ho

projects/ngx-ui-loader/karma.conf.js

@@ -29,7 +29,8 @@ module.exports = function (config) {
       subdir: '.',
       reporters: [
         { type: 'html' },
-        { type: 'text-summary' }
+        { type: 'text-summary' },
+        { type: 'lcov' }
       ]
     },
     reporters: ['progress', 'kjhtml'],

projects/ngx-ui-loader/src/test.ts

@@ -8,24 +8,14 @@ import {
   platformBrowserDynamicTesting,
 } from '@angular/platform-browser-dynamic/testing';
 
-declare const require: {
-  context(
-    path: string,
-    deep?: boolean,
-    filter?: RegExp
-  ): {
-    <T>(id: string): T;
-    keys(): string[];
-  };
-};
-
 // First, initialize the Angular testing environment.
 getTestBed().initTestEnvironment(
   BrowserDynamicTestingModule,
   platformBrowserDynamicTesting()
 );
 
-// Then we find all the tests.
-const context = require.context('./', true, /\.spec\.ts$/);
-// And load the modules.
-context.keys().map(context);
+// Import all spec files explicitly for Angular 15 compatibility
+import './lib/core/ngx-ui-loader.component.spec';
+import './lib/core/ngx-ui-loader.service.spec';
+import './lib/http/ngx-ui-loader-http.interceptor.spec';
+import './lib/utils/functions.spec';