Testing is that the integrated a part of Apex or the other application development. In Apex, we’ve separate test classes to develop for all the unit testing.

Test Classes

In SFDC, the code must have 75% code coverage so as to be deployed to Production. This code coverage is performed by the test classes. Test classes are the code snippets which test the functionality of other Apex class.
Let us write a test class for one among our codes which we’ve written previously. we’ll write test class to hide our Trigger and Helper class code. Below is that the trigger and helper class which must be covered.

// Trigger with Helper Class
trigger Customer_After_Insert on APEX_Customer__c (after update) {
CustomerTriggerHelper.createInvoiceRecords(Trigger.new, trigger.oldMap);
//Trigger calls the helper class and doesn't have any code in Trigger
}

// Helper Class:
public class CustomerTriggerHelper {
public static void createInvoiceRecords (List

customerList, Map oldMapCustomer) {
List InvoiceList = new List();

for (APEX_Customer__c objCustomer: customerList) {
if (objCustomer.APEX_Customer_Status__c == 'Active' &&
oldMapCustomer.get(objCustomer.id).APEX_Customer_Status__c == 'Inactive') {

// condition to see the old value and new value
APEX_Invoice__c objInvoice = new APEX_Invoice__c();
objInvoice.APEX_Status__c = 'Pending';
objInvoice.APEX_Customer__c = objCustomer.id;
InvoiceList.add(objInvoice);
}
}
insert InvoiceList; // DML to insert the Invoice List in SFDC
}
}

Creating Test Class

In this section, we’ll understand the way to create a Test Class.
Data Creation
We need to make data for test class in our test class itself. Test class by default doesn’t have access to organization data but if you set @isTest(seeAllData = true), then it’ll have the access to organization’s data also .
@isTest annotation
By using this annotation, you declared that this is often a test class and it’ll not be counted against the organization’s total code limit.
testMethod keyword
Unit test methods are the methods which don’t take arguments, commit no data to the database, send no emails, and are declared with the testMethod keyword or the isTest annotation within the method definition. Also, test methods must be defined in test classes, that is, classes annotated with isTest.
We have used the ‘myUnitTest’ test method in our examples.
Test.startTest() and Test.stopTest()
These are the quality test methods which are available for test classes. These methods contain the event or action that we’ll be simulating our test. Like during this example, we’ll test our trigger and helper class to simulate the hearth trigger by updating the records as we’ve done to start out and stop block. This also provides separate governor limit to the code which is in start and stop block.
System.assert()
This method checks the specified output with the particular . during this case, we expect an Invoice record to be inserted so we added assert to see an equivalent .
Example

/**
* This class contains unit tests for validating the behavior of Apex classes
* and triggers.
*
* Unit tests are class methods that verify whether a specific piece
* of code is functioning properly. Unit test methods take no arguments,
* commit no data to the database, and are flagged with the testMethod
* keyword within the method definition.
*
* All test methods in a corporation are executed whenever Apex code is deployed
* to a production organization to verify correctness, ensure code
* coverage, and stop regressions. All Apex classes are
* required to possess a minimum of 75% code coverage so as to be deployed
* to a production organization. additionally , all triggers must have some code coverage.
*
* The @isTest class annotation indicates this class only contains test
* methods. Classes defined with the @isTest annotation don't count against
* the organization size limit for all Apex scripts.
*
* See the Apex Language Reference for more information about Testing and Code Coverage.
*/

@isTest
private class CustomerTriggerTestClass {
static testMethod void myUnitTest() {
//Create Data for Customer Objet
APEX_Customer__c objCust = new APEX_Customer__c();
objCust.Name = 'Test Customer';
objCust.APEX_Customer_Status__c = 'Inactive';
insert objCust;

// Now, our trigger will fire on After update event so update the Records
Test.startTest(); // Starts the scope of test
objCust.APEX_Customer_Status__c = 'Active';
update objCust;
Test.stopTest(); // Ends the scope of test

// Now check if it's giving desired results using system.assert
// Statement.New invoice should be created
List invList = [SELECT Id, APEX_Customer__c FROM
APEX_Invoice__c WHERE APEX_Customer__c = :objCust.id];
system.assertEquals(1,invList.size());
// Check if one record is made in Invoivce sObject
}
}

Running the Test Class

Follow the steps given below to run the test class −
Step 1 − attend Apex classes ⇒ click on the category name ‘CustomerTriggerTestClass’.
Step 2 − Click on Run Test button as shown.

Step 3 − Check status

Step 4 − Now check the category and trigger that we’ve written the test
Class

Trigger

Our testing is successful and completed.
So, this brings us to the end of blog. This Tecklearn ‘How to perform Unit Testing in Apex’ blog helps you with commonly asked questions if you are looking out for a job in Salesforce. If you wish to learn Salesforce and build a career in Salesforce domain, then check out our interactive, Salesforce Certification Training: Admin 201 and App Builder, that comes with 24*7 support to guide you throughout your learning period. Please find the link for course details:

Salesforce Certification Training: Admin 201 and App Builder

Salesforce Certification Training: Admin 201 and App Builder

About the Course

Salesforce Certification Training course will help you pass the Salesforce Administrator Exam (Admin 201) and the Salesforce App Builder (Dev 401) Exam. Concepts on Force.com Platform, AppExchange, SFDC Security Model, Service Cloud, Sales Cloud, Lightning App Builder, Salesforce Reports & Dashboard can be mastered in this Salesforce Training course. You can also configure the platform, manage users, find better ways to use the platform’s features, build applications with Salesforce Lightning, and more. Further, in this Salesforce certification training course, you will master App builder, Apex, Visualforce, etc.

Why Should you take Salesforce Admin 201 and App Builder Training?

• As per Indeed.com data, 200% global jump in Salesforce jobs since Jan 2016. Salesforce Certified Administrators earn an annual average salary of $87,000 but can go as high as $160,000 depending on their knowledge, skills, and experience.
• More than 200,000 companies worldwide use Salesforce platform. Salesforce leads the CRM market with 19.5 percent of market share – Forbes.
• The global CRM software market will reach US$40.26 billion in 2023, up from US$36.9 billion (2020) – Statista.

What you will Learn in this Course?

Salesforce Fundamentals
• Introduction to CRM concepts and Cloud computing
• Salesforce.com Overview and Fundamentals
• Understanding Salesforce Platform
Understanding Salesforce Platform
• Understanding Salesforce Terminologies and Introducing the force.com platform
• Understanding Salesforce Metadata and API
• Describe the capabilities of the core CRM objects in the Salesforce schema
• Identify common scenarios for extending an org using the AppExchange
• About Salesforce Certification
Introduction to Sales Cloud
• Sales Cloud
• Sales Process
• Sales Productivity Features
• Lead Management
• Lead auto response
• Lead assignment
• Web to lead
• Accounts and Contacts Management
• Opportunities
• Campaign Management
Security Model, User Management and Its Features
• Security Model Mind Map
• System Level or Org Level Security
• User Administration and Troubleshooting
• Permission Sets
• Profile Management
• User Actions
• Assigning Permission
• Session settings
• Activations
• Page layout assignment
• Tab setting
• Field level security
Object, Record and Field Level Features
• Custom Object
• Custom Field
• Data Types
• Relationship among Objects
• Working with App and Tabs
Data Handling and Processing
• Data Import and Export with Salesforce
• Insert, Update and Delete Data with Salesforce
• Export Data with UI
• Export Data using Data Loader Tool
Deployment
• SandBox
• Moving Data from SB to Production – Deployment
• Types of SandBox
• Change Sets
• Types of Change Sets
Application Cycle
• Milestones
• Sandboxes
• Change Sets
• Packages
Reports and Dashboards
Declarative Implementation in Salesforce
Salesforce Development and Apex Programming
• Apex Programming
• Apex Classes
• Apex Settings
• SOQL – Salesforce Object Query Language
• DML Commands
• Apex Class in Detail
• Apex Triggers
• Apex Testing
• Access Specifier in Salesforce
• Testing
Lightning in Salesforce
• Lightning Components
• Lightning Component Capabilities
• Lightning Components vs. Visualforce
Visual Force in Salesforce
• Standard Visualforce controller and controller extensions,
• Visualforce Page
• Understanding the MVC Pattern
• Tools for Visualforce Development
• Visual Force Components
WorkFlows in Salesforce
• Work Flows in Salesforce
• Types of Work Flows
• Work Flows Rules
About Preparation of Salesforce 201 and App Builder Certification exams

Got a question for us? Please mention it in the comments section and we will get back to you.

688