Hi frnds,
Need some help for me 
to write a test class for the below class 

public class EF_GetUserDetailFormOkta_Search_AC
{

       //public String apiEndpoint = OKTA_EndPoint__c.getValues('OKTA').Site_URL__c;
       //public String result      = '[]';
       //public String authToken   = OKTA_EndPoint__c.getValues('OKTA').Auth_token__c;
     
        public string apiEndpoint   = 'http://ec2-user@ec2-54-219-23-118.us-west-1.compute.amazonaws.com:8090/allergan.oktapreview.com/api/v1/';
        public string authToken     = 'SSWS 006BBGUE4NNIpFNpdqUm8EWLELIQuQu-SoasGMeWnV';
        public Integer timeoutOKTA      = 60000; 


   
   
    public string strSearchData {get; set;}
    public List<string> lstData {get; set;}
    public List<WrapUserDetail> lstWrapAllData {get; set;}
   
    public boolean isUserNameSelected{get; set;}
    public boolean isFirstNameSelected{get; set;}
    public boolean isLastNameSelected{get; set;}
    public boolean isEmailSelected{get; set;}
    public boolean isEmployeeIDSelected{get; set;}
    public boolean isCPIDSelected{get; set;}
    public boolean isManagerIDSelected{get; set;}
   
    public class WrapUserDetail
    {
        public string strUserName {get; set;}
        public string strFirstName {get; set;}
        public string strLastName {get; set;}
        public string strTitle {get; set;}
        public string strEmail {get; set;}
        public string strEmployeeID {get; set;}
        public string strCPID {get; set;}
        public string strManager {get; set;}
        public string strLocation {get; set;}
        public string strUserOktaID {get; set;}
       
       
        public WrapUserDetail(string UserOktaID,string UserName, string FirstName, string LastName, string Title, string Email, string EmployeeID, string CPID, string Manager, string Location)
        {
            strUserOktaID = UserOktaID;
            strUserName = UserName;
            strFirstName = FirstName;
            strLastName = LastName;
            strTitle = Title;
            strEmail = Email;
            strEmployeeID = EmployeeID;
            strCPID = CPID;
            strManager = Manager;
            strLocation = Location;
        }
    }
   
    public EF_GetUserDetailFormOkta_Search_AC()
    {
        lstData = new List<string>();
        strSearchData = '';
    }
    public void SearchData()
    {
        lstWrapAllData = new List<WrapUserDetail>();
        string QueryFilter  = CreateSearchString();
        string result = getUserList(QueryFilter);
        List<object> lstAllData = (List<object>)JSON.deserializeUntyped(result);
        system.debug('lstAllDatalstAllDatalstAllData:: ' + lstAllData);
        for(object obj : lstAllData)
        {
           
            Map<string, Object> mapData = (Map<string, Object>)obj;
           
            Map<string, Object> mapProfile = (Map<string, Object>)mapData.get('profile');
            //strUserOktaID
            WrapUserDetail objWrapUserDetail = new WrapUserDetail((string)mapProfile.get('id'),(string)mapProfile.get('AGNLoginID'), (string)mapProfile.get('firstName'), (string)mapProfile.get('lastName'),
                                                                    (string)mapProfile.get('title'), (string)mapProfile.get('email'), (string)mapProfile.get('employeeID'),
                                                                    (string)mapProfile.get('IDMCPID'), (string)mapProfile.get('manager'), (string)mapProfile.get('IDMCORALLocation'));
           
            lstWrapAllData.add(objWrapUserDetail);
        }
    }
   
    /**
     * @author         Krzysztof Wasniowski <k.wasniowski@polsource.com>
     * @version        1.0
     * @date           12/1/2013
     * @description    Returns list of users maching given filter defintion from OCTA API
     * @param          string filterDefinition Filter definition, f.ex: (userName pr or name.givenName eq Edward)
     * @return         string API response (json string)
     * @throws         EF_OKTA_APIException throws an exception is response is not 200 or filter definition is empty
     */
    public String getUserList(string filterDefinition)
    {
        String result       = '[]';
       
        Http h              = new Http();
        HttpRequest req     = new HttpRequest();
        String queryParams  = '?filter=' + EncodingUtil.urlEncode(filterDefinition.trim(), 'UTF-8');
       
        system.debug('queryParamsqueryParamsqueryParams::::New ' + queryParams);
       
        req.setMethod('GET');
        req.setHeader('Accept', 'application/json');
        //req.setTimeout(timeoutOKTA);
        req.setEndpoint(apiEndpoint + '/users' + queryParams);
        req.setHeader('Authorization', authToken);
       
        system.debug('reqreqreqreq:::New ' + req);
       
        HttpResponse res = h.send(req);
        system.debug('resresresres:::New ' + res);
       
        if (200 == res.getStatusCode()) {
            result = res.getBody();
        }
       
        return result;
    }
   
    public string CreateSearchString()
    {
        string strQueryStringToReturn = '';
       
        if(isUserNameSelected)
        {
            if(strQueryStringToReturn != '')
                strQueryStringToReturn += ' or ';
           
            strQueryStringToReturn += 'profile.AGNLoginID co ' + '\'' + strSearchData + '\'';
        }
        if(isFirstNameSelected)
        {   
            if(strQueryStringToReturn != '')
                strQueryStringToReturn += ' or ';
           
            strQueryStringToReturn += 'profile.firstName co ' + '\'' + strSearchData + '\'';
        }
        if(isLastNameSelected)
        {   
            if(strQueryStringToReturn != '')
                strQueryStringToReturn += ' or ';
           
            strQueryStringToReturn += 'profile.lastName co ' + '\'' + strSearchData + '\'';
        }
        if(isEmailSelected)
        {   
            if(strQueryStringToReturn != '')
                strQueryStringToReturn += ' or ';
           
            strQueryStringToReturn += 'profile.email co ' + '\'' + strSearchData + '\'';
        }
        if(isEmployeeIDSelected)
        {   
            if(strQueryStringToReturn != '')
                strQueryStringToReturn += ' or ';
           
            strQueryStringToReturn += 'profile.employeeID co ' + '\'' + strSearchData + '\'';
        }
        if(isCPIDSelected)
        {   
            if(strQueryStringToReturn != '')
                strQueryStringToReturn += ' or ';
           
            strQueryStringToReturn += 'profile.IDMCPID co ' + '\'' + strSearchData + '\'';
        }
        if(isManagerIDSelected)
        {   
            if(strQueryStringToReturn != '')
                strQueryStringToReturn += ' or ';
           
            strQueryStringToReturn += 'profile.managerID co ' + '\'' + strSearchData + '\'';
        }
       
        system.debug('strQueryStringToReturn:::: ' + strQueryStringToReturn);
        return strQueryStringToReturn;
    }
}


Thanks in Advance