需求：为RemoteAction写TestClass

如果有如下的RemoteAction方法

    @RemoteAction
    public static List<Map<String, String>> searchUsers(String term) {
        List<Map<String, String>> results = new List<Map<String, String>>();
        if (String.isEmpty(term)) {
            return results;
        }
        String searchTerm = '%' + term + '%';
        system.debug(term);
        List<User> users = [SELECT Id, Name FROM User WHERE Name LIKE :searchTerm LIMIT 10];
        
        for (User user : users) {
            Map<String, String> userData = new Map<String, String>{
                'value' => user.Name,
                'label' => user.Name
            };
            results.add(userData);
        }
        
        return results;
    }

TestClass的写法

    @isTest
    static void testSearchUsers()
    {
        Profile p = [SELECT Id FROM Profile WHERE Name='システム管理者' limit 1];

        User userItem = new User(Alias = 'st', Email='standarduser@testorg.com',
        EmailEncodingKey='UTF-8', LastName='ABC', LanguageLocaleKey='en_US',
        LocaleSidKey='en_US', ProfileId = p.Id ,
        TimeZoneSidKey='America/Los_Angeles', Username='systemadTest001@testorg.com',
        CommunityNickname = 'Test');
        insert userItem;

        Test.startTest();
        PostingMapController.searchUsers(userItem.LastName);
        Test.stopTest();
        
        //当然了，需要在最后写上System.assertEquals();来验证执行结果是否正确
        
    }