feat(test): add --groups flag (#51)

Author: Julien-R44

commands/Test.ts

@@ -73,6 +73,12 @@ export default class Test extends BaseCommand {
   @flags.array({ description: 'Filter tests by title' })
   public tests: string[]
 
+  /**
+   * Filter by group title
+   */
+  @flags.array({ description: 'Filter tests by group title' })
+  public groups: string[]
+
   /**
    * Customize tests timeout
    */
@@ -118,6 +124,10 @@ export default class Test extends BaseCommand {
       filters['--tests'] = this.tests
     }
 
+    if (this.groups) {
+      filters['--groups'] = this.groups
+    }
+
     return filters
   }