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Stuck on Trailhead Challenge for Creating Test Data for Apex Tests
Create an Apex class that returns a list of contacts based on two incoming parameters: one for the number of contacts to generate, and the other for the last name. The list should NOT be inserted into the system, only returned. The first name should be dynamically generated and should be unique for each contact record in the list.The Apex class must be called 'RandomContactFactory' and be in the public scope.
The Apex class should NOT use the @isTest annotation.
The Apex class must have a public static method called 'generateRandomContacts' (without the @testMethod annotation).
The 'generateRandomContacts' method must accept an integer as the first parameter, and a string as the second. The first parameter controls the number of contacts being generated, the second is the last name of the contacts generated.
The 'generateRandomContacts' method should have a return type of List<Contact>.
The 'generateRandomContacts' method must be capable of consistently generating contacts with unique first names.
For example, the 'generateRandomContacts' might return first names based on iterated number (i.e. 'Test 1','Test 2').
The 'generateRandomContacts' method should not insert the contact records into the database.
I create a class as bellow
public class RandomContactFactory{
public static List<Contact> generateRandomContacts(integer n,string lastnames){
list<contact> c= [select FirstName from contact where LastName =: lastnames limit : n ];
return c;
}
}
but i'm getting error as below
Challenge not yet complete... here's what's wrong:
Executing the 'generateRandomContacts' method failed. Either the method does not exist, is not static, or did not return the correct set of Contact records.
Please let me know where the issue?
The Apex class should NOT use the @isTest annotation.
The Apex class must have a public static method called 'generateRandomContacts' (without the @testMethod annotation).
The 'generateRandomContacts' method must accept an integer as the first parameter, and a string as the second. The first parameter controls the number of contacts being generated, the second is the last name of the contacts generated.
The 'generateRandomContacts' method should have a return type of List<Contact>.
The 'generateRandomContacts' method must be capable of consistently generating contacts with unique first names.
For example, the 'generateRandomContacts' might return first names based on iterated number (i.e. 'Test 1','Test 2').
The 'generateRandomContacts' method should not insert the contact records into the database.
I create a class as bellow
public class RandomContactFactory{
public static List<Contact> generateRandomContacts(integer n,string lastnames){
list<contact> c= [select FirstName from contact where LastName =: lastnames limit : n ];
return c;
}
}
but i'm getting error as below
Challenge not yet complete... here's what's wrong:
Executing the 'generateRandomContacts' method failed. Either the method does not exist, is not static, or did not return the correct set of Contact records.
Please let me know where the issue?
Use this code as I was able to complete the challenge.
public with sharing class RandomContactFactory { public static List<Contact> generateRandomContacts( Integer noOfContacts, String lastName ) { List<Contact> contacts = new List<Contact>(); for( Integer i = 0; i < noOfContacts; i++ ) { Contact con = new Contact( FirstName = 'Test '+i, LastName = lastName ); contacts.add( con ); } return contacts; } }Let me know, if you need any other help. If this post helps, please mark it as best answer.
Thanks,
Neetu
All Answers
Use this code as I was able to complete the challenge.
public with sharing class RandomContactFactory { public static List<Contact> generateRandomContacts( Integer noOfContacts, String lastName ) { List<Contact> contacts = new List<Contact>(); for( Integer i = 0; i < noOfContacts; i++ ) { Contact con = new Contact( FirstName = 'Test '+i, LastName = lastName ); contacts.add( con ); } return contacts; } }Let me know, if you need any other help. If this post helps, please mark it as best answer.
Thanks,
Neetu
I completed the Challenge :-)
Satya P
Hi Neetu,
Why "With Sharing" is used in (public with sharing class RandomContactFactory)
What with Sharing is doing here???
It is good practice to use with sharing, as it will impose all your sharing rules created. It will help in preventing yor data to be accessed by users that don't have the permissions.
Thanks,
Neetu
Thanx.................
public static list<contact> generateRandomContacts(integer CON , string LN){
list<contact> CON1 = new list<contact>();
for (integer i=0 ;i<CON ; i++){
contact C = new contact(firstname = 'test' + i , lastname= LN);
CON1.add(C);
}
// return CON1 ;
}
public class RandomContactFactory {
public static List<Contact> generateRandomContacts(Integer numberofcontacts, string l_name){
List<Contact> cnts = new List<Contact>();
for(integer i=0; i<numberofcontacts; i++){
contact cnts1=New contact();
string Name='Test'+i;
cnts1.FirstName=Name;//add the content of name variable to First Name field of contact object
cnts1.LastName=l_name;//add the content of name variable to LastName field of contact object
cnts.Add(cnts1);//add to the list collection, Contact
}
return cnts;//returning the list to the called method
}
}
public class RandomContactFactory { public static List <Contact> generateRandomContacts(Integer numCont, String conLstName) { List<Contact> listContact = new List<Contact>(); for (Integer i=0; i < numCont; i++ ){ Contact con = new Contact(FirstName='Test' +i,LastName='conLstName'); listContact.add(con); } return listContact; } }I've used your code to pass the challenge but in comparison to my code(below), I can see you've written the LastName value as a String; 'conLstName', not variable reference.
Despite this, your code works which defeats the purpose of passing the LastName parameter in the first place. Have I misunderstood the syntax of referencing a string variable?
my code:
public with sharing class RandomContactFactory {
public static List<Contact> generateRandomContacts (Integer iterationSize, String lastName){
Contact[] contacts;
for(Integer i=0 ; i < iterationSize ; i++){
Contact newContact = new Contact (FirstName = 'Test '+i, LastName = lastName);
contacts.add(newContact);
}
return contacts;
}
}
public with sharing class RandomContactFactory {
public static List<Contact> generateRandomContacts (Integer ConNum, String LName){
List<Contact> Cons = new List<Contact>();
for(integer i=0; i<ConNum; i++){
Contact C = new Contact(FirstName='TestContact'+i , LastName=LName);
Cons.add(c);
}
Return Cons;
}
}
public class RandomContactFactory{ public static List<Contact> generateRandomContacts( Integer maxNumberOfContacts, String lName ){ List<Contact> contacts = new List<Contact>(); Integer counter=1; while(counter<=maxNumberOfContacts){ Contact con = new Contact(LastName = lName ); con.FirstName=('Test '+counter); contacts.add(con); counter++; } return contacts; } }I noticed this when I randomly looked at the logs after clicking the button that it was trying to execute the class without a test context.
Although I see that Satyanarayana Pusuluri has a line in his question saying that the Apex class should not use it. But as of today (Apr 17, 2021) it doesn't have it.
Hope this helps.
--Javed
public class RandomContactFactory { public static List<Contact> generateRandomContacts(Integer noofcontacts, String LName){ List<Contact> cons = new List<Contact> (); for(Integer i=0; i< noofcontacts; i++ ){ cons.add(new Contact (FirstName = 'Test' + i,LastName = Lname)); } return cons; } }public with sharing class RandomContactFactory { public static List<Contact> generateRandomContacts(Integer numContacts, String lName) { List<Contact> cons = new List<Contact>(); for(Integer i=0; i<numContacts; i++) { Contact c = new Contact(LastName = lName, FirstName = 'Test ' + i); cons.add(c); } return cons; } }public class RandomContactFactory {
public static List<Contact> generateRandomContacts(Integer numCnt, String lastName){
List<Contact> cnt = new List<Contact>();
for(Integer i=0; i < numCnt; i++) { // If you start the i from 1 since the instructions says Test1, Test2, it will not work
Contact c = new Contact(FirstName='Test' + i, LastName = lastName);
cnt.add(c);
}
return cnt;
}
}
public class RandomContactFactory { public static List<Contact> generateRandomContacts (integer para,string Ln){ List<contact> emtToFullContact = new list<contact>(); for(integer i=0;i<para;i++){ contact con = new contact(); con.Firstname= 'test'+i; con.Lastname= Ln; emtToFullContact.add(con); }return emtToFullContact; } }