@isTest
private class OperationResultTest {

    @IsTest
    static void testSuccess() {
        User u = [SELECT Id FROM User WHERE IsActive = TRUE LIMIT 1];
        System.runAs(u) {
            OperationResult r = OperationResult.success('test');
            System.assertEquals(true, r.success);
            System.assertEquals('Completed successfully', r.message);
            System.assertEquals('test', r.data);
        }
    }

    @IsTest
    static void testError() {
        User u = [SELECT Id FROM User WHERE IsActive = TRUE LIMIT 1];
        System.runAs(u) {
            OperationResult r = OperationResult.error('test');
            System.assertEquals(false, r.success);
            System.assertEquals('test', r.message);
        }
    }
}