Hi Team,

Can you pleae help me out test class for below class which is calling in case trigger before trigger.

Please help me out on this?

public class AH_HN_Stage_Validations {
    public static void validateStatus(List<Case> vListCase){
        for(Case eachCurrentCase : vListCase){
            String skipErrorMessage = 'You are not allowed to skip a stage. Please follow the workflow.';
            Case oldCase = (Case)Trigger.oldMap.get(eachCurrentCase.Id);
            Id recordtypeAPOId = Schema.SObjectType.Case.getRecordTypeInfosByName().get('APO').getRecordTypeId();
            Id recordtypeEARId = Schema.SObjectType.Case.getRecordTypeInfosByName().get('EAR').getRecordTypeId();
            
            If(eachCurrentCase.RecordTypeId == recordtypeAPOId || eachCurrentCase.RecordTypeId == recordtypeEARId){
                //Status validation for - QC1
                If(eachCurrentCase.Status == 'QC1'){
                    If(eachCurrentCase.Status == 'QC1' && oldCase.Status=='MRP'){
                        eachCurrentCase.addError(skipErrorMessage);
                    }                                
                }
                //Status validation for - Physician Expert Review
                If(eachCurrentCase.Status == 'Physician Expert Review'){
                    If(eachCurrentCase.Status == 'Physician Expert Review' && (oldCase.Status=='MRP' || oldCase.Status=='Narrative')){
                        eachCurrentCase.addError(skipErrorMessage);
                    }                                
                }
                //Status validation for - QC2
                If(eachCurrentCase.Status == 'QC2'){
                    If(eachCurrentCase.Status == 'QC2' && (oldCase.Status=='MRP' || oldCase.Status=='Narrative' || oldCase.Status=='QC1')){
                        eachCurrentCase.addError(skipErrorMessage);
                    }                                
                }
                //Status validation for - AH MD Review
                If(eachCurrentCase.Status == 'AH MD Review'){
                    If(eachCurrentCase.Status == 'AH MD Review' && (oldCase.Status=='MRP' || oldCase.Status=='Narrative' || oldCase.Status=='QC1' || oldCase.Status=='Physician Expert Review')){
                        eachCurrentCase.addError(skipErrorMessage);
                    }                                
                }
                //Status validation for - Report Sent
                If(eachCurrentCase.Status == 'Report Sent'){
                    If(eachCurrentCase.Status == 'Report Sent' && (oldCase.Status=='MRP' || oldCase.Status=='Narrative' || oldCase.Status=='QC1' || oldCase.Status=='Physician Expert Review' || oldCase.Status=='QC2')){
                        eachCurrentCase.addError(skipErrorMessage);
                    }                                
                }
                //Status validation for - Peer Consult
                    If(eachCurrentCase.Status == 'Peer Consult  '){
                        If(eachCurrentCase.Status == 'Peer Consult' && (oldCase.Status=='MRP' || oldCase.Status=='Narrative' || oldCase.Status=='QC1' || oldCase.Status=='Physician Expert Review' || oldCase.Status=='QC2' || oldCase.Status=='AH MD Review')){
                        eachCurrentCase.addError(skipErrorMessage);
                    }                                
                }
                //Status validation for - QC3
                If(eachCurrentCase.Status == 'QC3'){
                    If(eachCurrentCase.Status == 'QC3' && (oldCase.Status=='MRP' || oldCase.Status=='Narrative' || oldCase.Status=='QC1' || oldCase.Status=='Physician Expert Review' || oldCase.Status=='QC2' || oldCase.Status=='AH MD Review' || oldCase.Status=='Report Sent')){
                        eachCurrentCase.addError(skipErrorMessage);
                    }                                
                }
                //Status validation for - Peer Consult Review Sent
                If(eachCurrentCase.Status == 'Peer Consult Review Sent'){
                    If(eachCurrentCase.Status == 'Peer Consult Review Sent' && (oldCase.Status=='MRP' || oldCase.Status=='Narrative' || oldCase.Status=='QC1' || oldCase.Status=='Physician Expert Review' || oldCase.Status=='QC2' || oldCase.Status=='AH MD Review' || oldCase.Status=='Report Sent' || oldCase.Status=='Peer Consult')){
                        eachCurrentCase.addError(skipErrorMessage);
                    }                                
                }
                //Status validation for - Closed
                If(eachCurrentCase.Status == 'Closed' && oldCase.Status!='Peer Consult'){
                     If(eachCurrentCase.Status == 'Closed' &&  eachCurrentCase.Close_Reason__c==null && (oldCase.Status=='MRP' || oldCase.Status=='Narrative' || oldCase.Status=='QC1' || oldCase.Status=='Physician Expert Review' || oldCase.Status=='QC2' || oldCase.Status=='AH MD Review' || oldCase.Status=='Report Sent' || oldCase.Status=='QC3')){
                        eachCurrentCase.addError(skipErrorMessage);
                    }                                
                }
            }
        }
    }
    
    //MRP_MR_Review_Validations
    public static void MRPvalidate(List<Case> vListCase){
        for(Case eachCurrentCase : vListCase){
            String skipErrorMessage = 'Please complete MR Review.';
            Case oldCase = (Case)Trigger.oldMap.get(eachCurrentCase.Id);
            Id recordtypeAPOId = Schema.SObjectType.Case.getRecordTypeInfosByName().get('APO').getRecordTypeId();
            Id recordtypeEARId = Schema.SObjectType.Case.getRecordTypeInfosByName().get('EAR').getRecordTypeId();
            
            Id guestRecordtypeId = Schema.SObjectType.Task.getRecordTypeInfosByName().get('AH MR Review').getRecordTypeId();
            
            If(eachCurrentCase.RecordTypeId == recordtypeAPOId || eachCurrentCase.RecordTypeId == recordtypeEARId && eachCurrentCase.status != oldCase.status){
                If(eachCurrentCase.Status == 'Narrative' && [select Id, Status,(select id from Tasks Where RecordTypeId =:guestRecordtypeId) from Case Where Id =: eachCurrentCase.Id].Tasks.size()==0){
                    eachCurrentCase.addError(skipErrorMessage);               
                }    
            }
        }
    }
    //Narrative_Fields_Vaidations
    public static void narrativeValidate(List<Case> vListCase){
        for(Case eachCurrentCase : vListCase){
            String skipErrorMessage = 'Please fill clinical Narration.';
            Case oldCase = (Case)Trigger.oldMap.get(eachCurrentCase.Id);
            Id recordtypeAPOId = Schema.SObjectType.Case.getRecordTypeInfosByName().get('APO').getRecordTypeId();
            Id recordtypeEARId = Schema.SObjectType.Case.getRecordTypeInfosByName().get('EAR').getRecordTypeId();
            
            If(eachCurrentCase.RecordTypeId == recordtypeAPOId || eachCurrentCase.RecordTypeId == recordtypeEARId && eachCurrentCase.status != oldCase.status){
                If(eachCurrentCase.Status == 'QC1' && (eachCurrentCase.Clinical_Narrative__c == null && eachCurrentCase.Clinical_Summary__c == null)){
                    eachCurrentCase.addError(skipErrorMessage);               
                }    
            }
        }
    }
//Qc1 Fields_Vaidations
    public static void QC1validate(List<Case> vListCase){
        for(Case eachCurrentCase : vListCase){
            String skipErrorMessage = 'Please complete QC1 related task';
            Case oldCase = (Case)Trigger.oldMap.get(eachCurrentCase.Id);
            Id recordtypeAPOId = Schema.SObjectType.Case.getRecordTypeInfosByName().get('APO').getRecordTypeId();
            Id recordtypeEARId = Schema.SObjectType.Case.getRecordTypeInfosByName().get('EAR').getRecordTypeId();
            //Id guestRecordtypeId = Schema.SObjectType.Task.getRecordTypeInfosByName().get('AH Qualitycheck').getRecordTypeId();
            If(eachCurrentCase.RecordTypeId == recordtypeAPOId || eachCurrentCase.RecordTypeId == recordtypeEARId && eachCurrentCase.status != oldCase.status){
                If(eachCurrentCase.Status == 'Physician Expert Review' && [select Id, Status,(select id,status,Activity_Type__c from Tasks Where status='Open' and Activity_Type__c='QC1') from Case Where Id =: eachCurrentCase.Id].Tasks.size()>0){
                    eachCurrentCase.addError(skipErrorMessage);               
                }    
            }
        }
    }


    //Physician Review Fields_Vaidations
    public static void PhysicianexpertValidate(List<Case> vListCase){
        for(Case eachCurrentCase : vListCase){
            String skipErrorMessage = 'Please update the Physician clinical Review.';
            Case oldCase = (Case)Trigger.oldMap.get(eachCurrentCase.Id);
            Id recordtypeAPOId = Schema.SObjectType.Case.getRecordTypeInfosByName().get('APO').getRecordTypeId();
            Id recordtypeEARId = Schema.SObjectType.Case.getRecordTypeInfosByName().get('EAR').getRecordTypeId();
            Id PhyRewRecTypeId = Schema.SObjectType.Physician_Review__c.getRecordTypeInfosByName().get('Clinical Review').getRecordTypeId();
            If(eachCurrentCase.RecordTypeId == recordtypeAPOId || eachCurrentCase.RecordTypeId == recordtypeEARId && eachCurrentCase.status != oldCase.status){
            if(eachCurrentCase.status=='QC2' && [select Id, Status,(select id, Name from  Physician_Reviews__r Where RecordTypeId =:PhyRewRecTypeId) from Case Where Id =:eachCurrentCase.Id].Physician_Reviews__r.size()==0){
                    //Case varActualCaseRecord2 = (Case)Trigger.newMap.get(vCase1.Id); 
                    eachCurrentCase.adderror(skipErrorMessage );
                }
                  
            }
        }
    }
   //QC2 Validations   
     public static void QC2validate(List<Case> vListCase){
        for(Case eachCurrentCase : vListCase){
            String skipErrorMessage = 'Please complete QC2 related task';
            Case oldCase = (Case)Trigger.oldMap.get(eachCurrentCase.Id);
            Id recordtypeAPOId = Schema.SObjectType.Case.getRecordTypeInfosByName().get('APO').getRecordTypeId();
            Id recordtypeEARId = Schema.SObjectType.Case.getRecordTypeInfosByName().get('EAR').getRecordTypeId();
            If(eachCurrentCase.RecordTypeId == recordtypeAPOId || eachCurrentCase.RecordTypeId == recordtypeEARId && eachCurrentCase.status != oldCase.status){
                If(eachCurrentCase.Status == 'AH MD Review' && [select Id, Status,(select id from Tasks Where status='Open'and Activity_Type__c='QC2') from Case Where Id =: eachCurrentCase.Id].Tasks.size()>0){
                    eachCurrentCase.addError(skipErrorMessage);               
                }    
            }
        }
    }
    
    //AH MD Review Validations    
     public static void AHMDReviewvalidate(List<Case> vListCase){
        /*for(Case eachCurrentCase : vListCase){
             String skipErrorMessage = 'Please complete AH MD review related task';
            Case oldCase = (Case)Trigger.oldMap.get(eachCurrentCase.Id);
            Id recordtypeAPOId = Schema.SObjectType.Case.getRecordTypeInfosByName().get('APO').getRecordTypeId();
            Id recordtypeEARId = Schema.SObjectType.Case.getRecordTypeInfosByName().get('EAR').getRecordTypeId();            
            If(eachCurrentCase.RecordTypeId == recordtypeAPOId || eachCurrentCase.RecordTypeId == recordtypeEARId && eachCurrentCase.status != oldCase.status){
                If(eachCurrentCase.Status == 'Report Sent' && [select Id, Status,(select id from Tasks Where status='Completed' and Activity_Type__c='MD Review') from Case Where Id =: eachCurrentCase.Id].Tasks.size()==0){
                    eachCurrentCase.addError(skipErrorMessage);               
                }   
            }
        }*/
    }

    //Peer consult Validations 
   public static void Peerconsultvalidate(List<Case> vListCase){
        for(Case eachCurrentCase : vListCase){         
            Case oldCase = (Case)Trigger.oldMap.get(eachCurrentCase.Id);
            Id recordtypeAPOId = Schema.SObjectType.Case.getRecordTypeInfosByName().get('APO').getRecordTypeId();
            Id recordtypeEARId = Schema.SObjectType.Case.getRecordTypeInfosByName().get('EAR').getRecordTypeId();            
            If((eachCurrentCase.RecordTypeId == recordtypeAPOId || eachCurrentCase.RecordTypeId == recordtypeEARId)&& eachCurrentCase.status != oldCase.status){
                If(eachCurrentCase.Status == 'Peer Consult'){                   
                   /* If(eachCurrentCase.Peer_Consult_Required__c=='Yes'){
                       eachCurrentCase.Status = 'QC3';
                    }*/
                    
                    If(eachCurrentCase.Peer_Consult_Required__c=='No'){
                        eachCurrentCase.Status = 'Closed';
                        eachCurrentCase.Sub_Status__c='Completed';
                        //Closedvalidation(vListCase);
                    }      
             }
        }
      }      
    } 
    
     //Peerconsult Validations   
     public static void Peerconsultvalidations(List<Case> vListCase){
        for(Case eachCurrentCase : vListCase){
            String skipErrorMessage = 'Please update the Physician P2P Review.';
            Case oldCase = (Case)Trigger.oldMap.get(eachCurrentCase.Id);
            Id recordtypeAPOId = Schema.SObjectType.Case.getRecordTypeInfosByName().get('APO').getRecordTypeId();
            Id recordtypeEARId = Schema.SObjectType.Case.getRecordTypeInfosByName().get('EAR').getRecordTypeId();
            Id PhyRewRecTypeId = Schema.SObjectType.Physician_Review__c.getRecordTypeInfosByName().get('P2P Review').getRecordTypeId();
            If(eachCurrentCase.RecordTypeId == recordtypeAPOId || eachCurrentCase.RecordTypeId == recordtypeEARId && eachCurrentCase.status != oldCase.status){
                If(eachCurrentCase.Status == 'QC3' && [select Id, Status,(select id, Name from  Physician_Reviews__r Where RecordTypeId =:PhyRewRecTypeId) from Case Where Id =:eachCurrentCase.Id].Physician_Reviews__r.size()==0){
                eachCurrentCase.addError(skipErrorMessage);               
                }    
            }
        }
    }

    //QC3 Validations
     public static void QC3validate(List<Case> vListCase){
        for(Case eachCurrentCase : vListCase){
            String skipErrorMessage = 'Please complete QC3 related task';
            Case oldCase = (Case)Trigger.oldMap.get(eachCurrentCase.Id);
            Id recordtypeAPOId = Schema.SObjectType.Case.getRecordTypeInfosByName().get('APO').getRecordTypeId();
            Id recordtypeEARId = Schema.SObjectType.Case.getRecordTypeInfosByName().get('EAR').getRecordTypeId();
            
            If(eachCurrentCase.RecordTypeId == recordtypeAPOId || eachCurrentCase.RecordTypeId == recordtypeEARId && eachCurrentCase.status != oldCase.status){
                If(eachCurrentCase.Status == 'Peer Consult Review Sent' && [select Id, Status,(select id from Tasks Where status='Open' and Activity_Type__c='QC3') from Case Where Id =: eachCurrentCase.Id].Tasks.size()>0){
                    eachCurrentCase.addError(skipErrorMessage);               
                }    
            }
        }
    }
    
    //Closed Validations    
     public static void Closedvalidation(List<Case> vListCase){
        for(Case eachCurrentCase : vListCase){
            String skipErrorMessage = 'Outcome must be completed in order to close case.';
            Case oldCase = (Case)Trigger.oldMap.get(eachCurrentCase.Id);
            Id recordtypeAPOId = Schema.SObjectType.Case.getRecordTypeInfosByName().get('APO').getRecordTypeId();
            Id recordtypeEARId = Schema.SObjectType.Case.getRecordTypeInfosByName().get('EAR').getRecordTypeId();            
            If(eachCurrentCase.RecordTypeId == recordtypeAPOId || eachCurrentCase.RecordTypeId == recordtypeEARId && eachCurrentCase.status != oldCase.status){
               if(eachCurrentCase.Status=='Closed'){
                       eachCurrentCase.Sub_Status__c='Completed';
                    If(eachCurrentCase.Sub_Status__c =='Completed' &&  (eachCurrentCase.Humanistic_Outcomes__c==null || eachCurrentCase.Appropriate_Use_of_Healthcare__c==null || eachCurrentCase.Area_of_Cost_Savings__c==null || eachCurrentCase.Outcome_of_Review__c==null)){
                        eachCurrentCase.adderror(skipErrorMessage);
                    } 
               }
            }
        }
    }
}

Regards,
Isha