Hi All,
How to write test class for below class.pls help me

public class searchres2
{

    public String selectedvalue { get; set; }
    public string country{get;set;}
    public string TypeOfProgram{get;set;}
    public string  CourseSepcialisation1{get;set;}
    public string CourseCategory3{get;set;}
    
    public list<University_Database__c> bank{get;set;}
    Public University_Database__c ban{get;set;}
    public id sh;
    public void login()
    {
        
        bank = [select id,Country1__c,TypeOfProgram__c,Course_Sepcialisation1__c,Course_Category__c from University_Database__c where Country1__c=:country 
                                                                                and TypeOfProgram__c=:TypeOfProgram and Course_Category__c=:CourseCategory3 and Course_Sepcialisation1__c=:CourseSepcialisation1 LIMIT 1000];
    }
    public String getSelected_value() 
    {
        return null;
    }
     public List<SelectOption> getcountryOptions()    
    {    
        List<SelectOption> options =  new List<SelectOption>();    
        options.add(new selectOption('None','--- None ---'));    
        Schema.DescribeFieldResult fieldResult = University_Database__c.Country1__c.getDescribe();    
        List<Schema.picklistEntry> ple = fieldResult.getPicklistValues();    
        for(Schema.picklistEntry f:ple)    
          {
            options.add(new selectOption(f.getLabel(),f.getValue()));
           
         }  
        return options;
    }
     public List<SelectOption> getTypeOfProgramOptions()    
    {    
        List<SelectOption> options =  new List<SelectOption>();    
        options.add(new selectOption('None','--- None ---'));    
        Schema.DescribeFieldResult fieldResult = University_Database__c.TypeOfProgram__c.getDescribe();    
        List<Schema.picklistEntry> ple = fieldResult.getPicklistValues();    
        for(Schema.picklistEntry f:ple)    
          {
            options.add(new selectOption(f.getLabel(),f.getValue()));
           
         }  
        return options;
    }
    public List<SelectOption> getCourseCategory3Options()    
    {    
        List<SelectOption> options =  new List<SelectOption>();    
        options.add(new selectOption('None','--- None ---'));    
        Schema.DescribeFieldResult fieldResult = University_Database__c.Course_Category__c.getDescribe();    
        List<Schema.picklistEntry> ple = fieldResult.getPicklistValues();    
        for(Schema.picklistEntry f:ple)    
          {
            options.add(new selectOption(f.getLabel(),f.getValue()));
           
         }  
        return options;
    } 
                
}