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Ganesh PrasathGanesh Prasath 

Apex class for a trigger

Hi All ,

Am new to Apex programmin , with some help ive written the following Apex trigger but I need to write the test class and I got the code covereage error as 0% , any help would be much appreciated.


trigger TaskTrigger on Task (after update , before insert) {
    
    set<string> Emails = new set<string>();
    list<contact>ContactList = [select id, email from contact];
    
    for(contact c: [select id, Email from contact])
    {
        Emails.add(c.Email);
    }
    
    list<contact>NewContactList = new list<contact>();
    for(task t : trigger.new)
    
  {
        if( t.Type == 'Visits') //This IF conditions checks whether task type is Meeting or not

    if (t.New_Key_Contact_s_Email_address__c <> null)
  { 
    
    {
        if((Emails.contains(t.New_Key_Contact_s_Email_address__c) == true) )
            {
            t.New_Key_Contact_s_First_Name__c.addError('This contact already exists');
            t.New_Key_Contact_s_Last_Name__c.addError('This contact already exists');
            t.New_Key_Contact_s_Email_address__c.addError('This Email already exists');
            }
        else
        {
            contact c = new contact();
            c.FirstName = t.New_Key_Contact_s_First_Name__c;
            c.LastName = t.New_Key_Contact_s_Last_Name__c;
            c.Position__c = t.New_Key_Contact_s_Position__c;
            c.Email = t.New_Key_Contact_s_Email_address__c;
            NewContactList.add(c);
        }
    }

Regards
Ganesh
Best Answer chosen by Ganesh Prasath
Amit Chaudhary 8Amit Chaudhary 8
Please check below post for test classes. I hope that will help you


Please try below code.
@isTest 
public class TaskTriggerTest 
{
	static testMethod void testMethodOne() 
	{
		Account acc= new Account();
		acc.Name='Test Account';
		insert acc;
		
		Contact cont = new Contact();
		cont.FirstName ='FirstName';
		cont.LastName ='LastName';
		cont.accountid = acc.id;
		cont.email ='LastName@test.com';
		insert cont; 

		Task tsk = new Task();
        tsk.WhatID = acc.id;
        tsk.whoid = cont.id;
        tsk.Subject='Donni';
        tsk.Status='Completed';
        tsk.Priority='Normal';
        tsk.Type ='Visits';
        tsk.New_Key_Contact_s_Email_address__c='FirstName@test.com';
        insert t; 
	}

	static testMethod void testMethodTwo() 
	{
		Account acc= new Account();
		acc.Name='Test Account';
		insert acc;
		
		Contact cont = new Contact();
		cont.FirstName ='FirstName';
		cont.LastName ='LastName';
		cont.accountid = acc.id;
		cont.email ='LastName@test.com';
		insert cont; 

		Task tsk = new Task();
        tsk.WhatID = acc.id;
        tsk.whoid = cont.id;
        tsk.Subject='Donni';
        tsk.Status='Completed';
        tsk.Priority='Normal';
        tsk.Type ='Visits';
        tsk.New_Key_Contact_s_Email_address__c='LastName@test.com';
		try
		{
			insert t; 
		}Catch(Exception ee)
		{}	
	}
	
}
Please follow below salesforce Best Practice for Test Classes :-

1. Test class must start with @isTest annotation if class class version is more than 25
2. Test environment support @testVisible , @testSetUp as well
3. Unit test is to test particular piece of code working properly or not .
4. Unit test method takes no argument ,commit no data to database ,send no email ,flagged with testMethod keyword .
5. To deploy to production at-least 75% code coverage is required
6. System.debug statement are not counted as a part of apex code limit.
7. Test method and test classes are not counted as a part of code limit
9. We should not focus on the  percentage of code coverage ,we should make sure that every use case should covered including positive, negative,bulk and single record .
Single Action -To verify that the the single record produces the correct an expected result .
Bulk action -Any apex record trigger ,class or extension must be invoked for 1-200 records .
Positive behavior : Test every expected behavior occurs through every expected permutation , i,e user filled out every correctly data and not go past the limit .
Negative Testcase :-Not to add future date , Not to specify negative amount.
Restricted User :-Test whether a user with restricted access used in your code .
10. Test class should be annotated with @isTest .
11 . @isTest annotation with test method  is equivalent to testMethod keyword .
12. Test method should static and no void return type .
13. Test class and method default access is private ,no matter to add access specifier .
14. classes with @isTest annotation can't be a interface or enum .
15. Test method code can't be invoked by non test request .
16. Stating with salesforce API 28.0 test method can not reside inside non test classes .
17. @Testvisible annotation to make visible private methods inside test classes.
18. Test method can not be used to test web-service call out . Please use call out mock .
19. You can't  send email from test method.
20.User, profile, organization, AsyncApexjob, Corntrigger, RecordType, ApexClass, ApexComponent ,ApexPage we can access without (seeAllData=true) .
21. SeeAllData=true will not work for API 23 version eailer .
22. Accessing static resource test records in test class e,g List<Account> accList=Test.loadData(Account,SobjectType,'ResourceName').
23. Create TestFactory class with @isTest annotation to exclude from organization code size limit .
24. @testSetup to create test records once in a method  and use in every test method in the test class .
25. We can run unit test by using Salesforce Standard UI,Force.com IDE ,Console ,API.
26. Maximum number of test classes run per 24 hour of period is  not grater of 500 or 10 multiplication of test classes of your organization.
27. As apex runs in system mode so the permission and record sharing are not taken into account . So we need to use system.runAs to enforce record sharing .
28. System.runAs will not enforce user permission or field level permission .
29. Every test to runAs count against the total number of DML issued in the process .


Please let us know if this post will help you

 

All Answers

Rupali PophaliyaRupali Pophaliya
Refer this for writing test methods for trigger:

https://developer.salesforce.com/page/How_To_Test_Your_Apex_Triggers
sslodhi87sslodhi87
Hi Ganesh,

You need to create and update the task record in test class, that will call your trigger automatically.

Thanks
Amit Chaudhary 8Amit Chaudhary 8
Please check below post for test classes. I hope that will help you


Please try below code.
@isTest 
public class TaskTriggerTest 
{
	static testMethod void testMethodOne() 
	{
		Account acc= new Account();
		acc.Name='Test Account';
		insert acc;
		
		Contact cont = new Contact();
		cont.FirstName ='FirstName';
		cont.LastName ='LastName';
		cont.accountid = acc.id;
		cont.email ='LastName@test.com';
		insert cont; 

		Task tsk = new Task();
        tsk.WhatID = acc.id;
        tsk.whoid = cont.id;
        tsk.Subject='Donni';
        tsk.Status='Completed';
        tsk.Priority='Normal';
        tsk.Type ='Visits';
        tsk.New_Key_Contact_s_Email_address__c='FirstName@test.com';
        insert t; 
	}

	static testMethod void testMethodTwo() 
	{
		Account acc= new Account();
		acc.Name='Test Account';
		insert acc;
		
		Contact cont = new Contact();
		cont.FirstName ='FirstName';
		cont.LastName ='LastName';
		cont.accountid = acc.id;
		cont.email ='LastName@test.com';
		insert cont; 

		Task tsk = new Task();
        tsk.WhatID = acc.id;
        tsk.whoid = cont.id;
        tsk.Subject='Donni';
        tsk.Status='Completed';
        tsk.Priority='Normal';
        tsk.Type ='Visits';
        tsk.New_Key_Contact_s_Email_address__c='LastName@test.com';
		try
		{
			insert t; 
		}Catch(Exception ee)
		{}	
	}
	
}
Please follow below salesforce Best Practice for Test Classes :-

1. Test class must start with @isTest annotation if class class version is more than 25
2. Test environment support @testVisible , @testSetUp as well
3. Unit test is to test particular piece of code working properly or not .
4. Unit test method takes no argument ,commit no data to database ,send no email ,flagged with testMethod keyword .
5. To deploy to production at-least 75% code coverage is required
6. System.debug statement are not counted as a part of apex code limit.
7. Test method and test classes are not counted as a part of code limit
9. We should not focus on the  percentage of code coverage ,we should make sure that every use case should covered including positive, negative,bulk and single record .
Single Action -To verify that the the single record produces the correct an expected result .
Bulk action -Any apex record trigger ,class or extension must be invoked for 1-200 records .
Positive behavior : Test every expected behavior occurs through every expected permutation , i,e user filled out every correctly data and not go past the limit .
Negative Testcase :-Not to add future date , Not to specify negative amount.
Restricted User :-Test whether a user with restricted access used in your code .
10. Test class should be annotated with @isTest .
11 . @isTest annotation with test method  is equivalent to testMethod keyword .
12. Test method should static and no void return type .
13. Test class and method default access is private ,no matter to add access specifier .
14. classes with @isTest annotation can't be a interface or enum .
15. Test method code can't be invoked by non test request .
16. Stating with salesforce API 28.0 test method can not reside inside non test classes .
17. @Testvisible annotation to make visible private methods inside test classes.
18. Test method can not be used to test web-service call out . Please use call out mock .
19. You can't  send email from test method.
20.User, profile, organization, AsyncApexjob, Corntrigger, RecordType, ApexClass, ApexComponent ,ApexPage we can access without (seeAllData=true) .
21. SeeAllData=true will not work for API 23 version eailer .
22. Accessing static resource test records in test class e,g List<Account> accList=Test.loadData(Account,SobjectType,'ResourceName').
23. Create TestFactory class with @isTest annotation to exclude from organization code size limit .
24. @testSetup to create test records once in a method  and use in every test method in the test class .
25. We can run unit test by using Salesforce Standard UI,Force.com IDE ,Console ,API.
26. Maximum number of test classes run per 24 hour of period is  not grater of 500 or 10 multiplication of test classes of your organization.
27. As apex runs in system mode so the permission and record sharing are not taken into account . So we need to use system.runAs to enforce record sharing .
28. System.runAs will not enforce user permission or field level permission .
29. Every test to runAs count against the total number of DML issued in the process .


Please let us know if this post will help you

 
This was selected as the best answer
Ganesh PrasathGanesh Prasath
Hi Amit , 

Thanks a a lot for the reply , Ive understood what has to be written for an Apex test class for a trigger.

Thanks a lot. 
Ganesh