Hi

I am really struggling trying to write the test class for this class, if anyone can help  or point me in the right direction it would be greatly appreciated.

Thanks

public class CaseArticleSfdcController{
    Case record;
    CaseArticle[] articles;
    String[] caseArticleIds;
    String fields;
    String caselanguage;
    Public String zzLang;
    Map<Id,List<FAQ__kav>> faqs;
   
    public Map<Id,List<FAQ__kav>> getFaqs(){
    zzLang=Caselanguage;
        if(faqs==null){
            if( hasArticles() ){
                String flds='';
                if( hasFields() ) flds=','+String.join(getFieldsArray(),',');
                String selectClause='SELECT Id'+flds+' ';
                String fromClause='FROM FAQ__kav ';
                String whereClause='WHERE Language = \'' + zzLang +'\' and IsVisibleInPkb= true and PublishStatus=\'Online\' and KnowledgeArticleId IN (\''+ String.join(getKnowledgeArticleIds(),'\',\'') +'\')';

//                String whereClause='WHERE Language = \'en_US\' and PublishStatus=\'Online\' and KnowledgeArticleId IN (\''+ String.join(getKnowledgeArticleIds(),'\',\'') +'\')';
               

                String qry=selectClause    +    fromClause    +    whereClause;
                Map<Id,List<FAQ__kav>> faqMap=new Map<Id,List<FAQ__kav>>();
                List<Faq__kav> results;
                system.debug('-----qry: '+qry);
                try{
                    results=database.query(qry);
                }catch(CaseArticleException e){
                   
                    ApexPages.addMessages(e);
                }
                if(results!=null){
                    for(Faq__kav f : results){
                        if(!faqMap.containsKey(f.KnowledgeArticleId)) faqMap.put(f.KnowledgeArticleId,new List<FAQ__kav>());
                        faqMap.get(f.KnowledgeArticleId).add(f);
                    }
                    faqs=faqMap;
                }
            } else ApexPages.addMessages(new CaseArticleException('Missing articles'));
        }
        return faqs;
    }
    public String[] getCaseArticleIds(){
        return caseArticleIds;
    }
    public void setCaseArticleIds(String[] s){
        caseArticleIds=s;
    }
    private List<String> getKnowledgeArticleIds(){
        if(    hasArticles()    ){
            List<String> ids=new List<String>();
            for(CaseArticle ca : getArticles())
                ids.add(ca.KnowledgeArticleId);
            return ids;
        } return null;
    }
    public Boolean hasArticles() {
        return getArticles()!=null;
    }
    public Case getRecord(){
        return record;
    }
    public void setRecord(Case c){
        record=c;
    }
    private CaseArticle[] getArticles(){
        if( articles==null ) {
            try{
                articles=[select id, KnowledgeArticleId,CaseId from CaseArticle where CaseId=:record.id];
            } catch(CaseArticleException e){
                ApexPages.addMessages(e);
            }
        }
        return articles;
    }
    private String[] getFieldsArray(){
        if(getFields()!=null)    return getFields().split(',');
        return null;
    }
    public Boolean hasFields(){
        return getFields()!=null;
    }
    public String getFields(){
        return fields;
    }
    public void setFields(String s){
        fields=s;
    }
   
    public String getCaseLanguage(){
        return caselanguage;
    }
    public void setCaseLanguage(String s){
        caselanguage=s;   
    }
    public class CaseArticleException extends Exception{}

  public static Boolean isRunningTest {
    set;
    get {
        if (isRunningTest == null) isRunningTest = false;
        return isRunningTest;
    }
  }   

}