actully my calss and test calss is  

public class weeksreportctrl1
{
public list<countofweek> weekcounts{set;get;}
public list<weekname> weeknames{set;get;}
public class weekname{
Public String Wname{set;get;}
}
public class weekcount{
public Integer w1{get;set;}
public weekcount(){
w1=0;
}
}
public class countofweek{
Public String Name{set;get;}
public list<weekcount> weekobjcount{set;get;}
public countofweek(){
weekobjcount=new list<weekcount>();
}
}

public list<Lead> Dateenterdlist=new list<Lead>();
public list<Lead> Basicslist=new list<Lead>();
public list<Lead> Appinlist=new list<Lead>();
public list<Lead> Integererviewlist=new list<Lead>();
public list<opportunity> Docslist=new list<opportunity>();
public list<lead> leadslist=new list<lead>();
public map<string,id> recordt=new map<string,id>();
public weeksreportctrl1()
{
weekcounts=new list<countofweek>();
weeknames=new list<weekname>();
if(weekcounts.size()>0)
weekcounts.clear();
Date dtoday;
Date d24;
Date dstart;
Date dend;

if(system.today().month()>=2&&system.today().month()<=7){
dtoday=Date.newInstance(system.today().year(),1,30);
d24=Date.newInstance(system.today().year(),7,29);
dstart=dtoday;
dend=d24;
}
else if((system.today().month()>=8&&system.today().month()<=12)){
dtoday=Date.newInstance(system.today().year(),7,30);
d24=Date.newInstance(system.today().year()+1,1,27);
dstart=dtoday;
dend=d24;
}
else if(system.today().month()==1){
dtoday=Date.newInstance(system.today().year()-1,7,30);
d24=Date.newInstance(system.today().year(),1,27);
dstart=dtoday;
dend=d24;
}
for(recordtype r:[select id,Name from recordtype where SobjectType='lead'])
if(r!=null)
recordt.put(r.name,r.id);

for(recordtype r:[select id,Name from recordtype where SobjectType='opportunity'])
if(r!=null)
recordt.put(r.name,r.id);
//system.debug(r.name);

/*for(opportunity opp:[select Cancelled__c from opportunity where Cancelled__c>=:dtoday and Cancelled__c<=:d24 and Cancelled__c!=:null and recordtypeid=:recordt.get('ILP Signup Type') limit 50000])
{
Dateenterdlist.add(opp);
}
for(opportunity opp:[select Basics__c from opportunity where Basics__c>=:dtoday and Basics__c<=:d24 and Basics__c!=:null and recordtypeid=:recordt.get('ILP Signup Type') limit 50000])
{
Basicslist.add(opp);
}
for(opportunity opp:[select App_in__c from opportunity where App_in__c>=:dtoday and App_in__c<=:d24 and App_in__c!=:null and recordtypeid=:recordt.get('ILP Signup Type') limit 50000])
{
Appinlist.add(opp);
}
for(opportunity opp:[select Interview__c from opportunity where Interview__c>=:dtoday and Interview__c<=:d24 and Interview__c!=null and recordtypeid=:recordt.get('ILP Signup Type') limit 50000])
{
Integererviewlist.add(opp);
}*/
for(Lead opp:[select Cancelled__c from Lead where Cancelled__c>=:dtoday and Cancelled__c<=:d24 and Cancelled__c!=:null and recordtypeid=:recordt.get('ILP Volunteer Lead') and type__c=:'ILP Volunteer Teacher' limit 50000])
{
Dateenterdlist.add(opp);
}
for(Lead opp:[select Basics__c from Lead where Basics__c>=:dtoday and Basics__c<=:d24 and Basics__c!=:null and recordtypeid=:recordt.get('ILP Volunteer Lead') and type__c=:'ILP Volunteer Teacher' limit 50000])
{
Basicslist.add(opp);
}
for(Lead opp:[select App_in__c from Lead where App_in__c>=:dtoday and App_in__c<=:d24 and App_in__c!=:null and recordtypeid=:recordt.get('ILP Volunteer Lead') and type__c=:'ILP Volunteer Teacher' limit 50000])
{
Appinlist.add(opp);
}
for(Lead opp:[select Interview__c from Lead where Interview__c>=:dtoday and Interview__c<=:d24 and Interview__c!=null and recordtypeid=:recordt.get('ILP Volunteer Lead') and type__c=:'ILP Volunteer Teacher' limit 50000])
{
Integererviewlist.add(opp);
}
for(opportunity opp:[select Docs_in__c from opportunity where Docs_in__c>=:dtoday and Docs_in__c<=:d24 and Docs_in__c!=:null and recordtypeid=:recordt.get('ILP Signup Type') limit 50000])
{
Docslist.add(opp);
}
for(lead l:[select Createddate from lead where createddate>=:dtoday and createddate<=:d24 and recordtypeid=:recordt.get('ILP Volunteer Lead') limit 50000])
{
leadslist.add(l);
}

Date dhstart=dstart;
while(dhstart<=dend){
Date dt1;

dt1=dhstart;

dhstart=dt1.adddays(7);

string result =string.valueof(dt1);
weekname wn=new weekname();
wn.Wname=result.substring(5,7)+'/'+result.substring(8,10);
weeknames.add(wn);
}
if(leadslist.size()>0||leadslist.size()==0){
countofweek c=new countofweek();
c.Name='ILP Volunteer Leads';
Date dl=dstart;
while(dl<=dend){
weekcount wc=new weekcount();
Date dt1;
dt1=dl;
dl=dt1.adddays(7);
for(lead opp:leadslist){
if(opp.Createddate!=null){
if(opp.Createddate>=dt1 && opp.Createddate<dl){
wc.w1=wc.w1+1;
}
}
}
c.weekobjcount.add(wc);
}
weekcounts.add(c);
}
if(Basicslist.size()>0||Basicslist.size()==0){
countofweek c=new countofweek();
c.Name='Basics';
Date Db=dstart;

while(Db<=dend){

weekcount wc=new weekcount();
Date dt1;
dt1=Db;
db=dt1.adddays(7);
for(Lead opp:Basicslist){
if(opp.Basics__c!=null){
if(opp.Basics__c>=dt1 &&opp.Basics__c<db){
wc.w1=wc.w1+1;
}
}
}
c.weekobjcount.add(wc);
}
weekcounts.add(c);
}
if(Integererviewlist.size()>0||Integererviewlist.size()==0){
countofweek c=new countofweek();
c.Name='Interview';
Date Di=dstart;
while(Di<=dend){
weekcount wc=new weekcount();
Date dt1;
dt1=Di;
Di=dt1.adddays(7);
for(Lead opp:Integererviewlist){
if(opp.Interview__c!=null){
if(opp.Interview__c>=dt1 &&opp.Interview__c<Di){
wc.w1=wc.w1+1;
}
}
}
c.weekobjcount.add(wc);
}
weekcounts.add(c);
}
if(Appinlist.size()>0||Appinlist.size()==0){
countofweek c=new countofweek();
c.Name='App In';

date dapp=dstart;
while(dapp<=dend){
weekcount wc=new weekcount();
Date dt1;
dt1=Dapp;
dapp=dt1.adddays(7);
for(Lead opp:Appinlist){
if(opp.App_in__c!=null){
if(opp.App_in__c>=dt1 &&opp.App_in__c<dapp){
wc.w1=wc.w1+1;
}
}
}
c.weekobjcount.add(wc);
}
weekcounts.add(c);
}

if(Docslist.size()>0||Docslist.size()==0){
countofweek c=new countofweek();
c.Name='Docs-in';
Date Dd2=dstart;
while(Dd2<=dend){
weekcount wc=new weekcount();
Date dt1;
dt1=dd2;
Dd2=dt1.adddays(7);
for(opportunity opp:Docslist){
if(opp.Docs_in__c!=null){
if(opp.Docs_in__c>=dt1 && opp.Docs_in__c<Dd2){
wc.w1=wc.w1+1;
}
}
}
c.weekobjcount.add(wc);
}
weekcounts.add(c);
}
if(Dateenterdlist.size()>0||Dateenterdlist.size()==0){
countofweek c=new countofweek();
c.Name='Cancelled';
date dde=dstart;

while(dde<=dend){
weekcount wc=new weekcount();
Date dt1;
dt1=dde;
dde=dt1.adddays(7);

for(Lead opp:Dateenterdlist){
if(opp.Cancelled__c!=null){
if(opp.Cancelled__c>=dt1 &&opp.Cancelled__c<dde){
wc.w1=wc.w1+1;

}
}

}
c.weekobjcount.add(wc);
}
weekcounts.add(c);
}

}
public list<countofweek> getwlist()
{
return weekcounts;
}
public list<weekname> getweeknames1()
{
if(weeknames.size()>0)
return weeknames;
else
return null;
}
public Pagereference excel()
{
pagereference pr=new pagereference('/apex/WeekReport_Excel');

return pr;
}
public Pagereference epdf()
{
pagereference pr=new pagereference('/apex/WeekReport_Pdf');

return pr;
}

public static testmethod void weekreporttest(){
opportunity opp=new opportunity(Name='abctest',closedate=system.today(),StageName='Prospecting',Interview__c=system.now(),Basics__c=system.now(),Cancelled__c=system.now());
insert opp;
lead l=new lead(Lastname='abc',Company='bcd');
insert l;
weeksreportctrl1 w=new weeksreportctrl1();
w.getwlist();
w.getweeknames1();
w.excel();
w.epdf();
}
}

 and i  got 83%   without errors