Second-Generation Managed Packaging Developer Guide
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Example of a Post Install Script
The following sample post install script performs
these actions on package install/upgrade.
-
If the previous version is null, that is, the package is being installed for the first time, the script:
- Creates a new Account called Newco and verifies that it was created.
- Creates a new instance of the custom object Survey, called Client Satisfaction Survey.
- Sends an email message to the subscriber confirming installation of the package.
- If the previous version is 1.0, the script creates a new instance of Survey called ”Upgrading from Version 1.0”.
- If the package is an upgrade, the script creates a new instance of Survey called ”Sample Survey during Upgrade”.
- If the upgrade is being pushed, the script creates a new instance of Survey called ”Sample Survey during Push”.
public class PostInstallClass implements InstallHandler {
global void onInstall(InstallContext context) {
if(context.previousVersion() == null) {
Account a = new Account(name='Newco');
insert(a);
Survey__c obj = new Survey__c(name='Client Satisfaction Survey');
insert obj;
User u = [Select Id, Email from User where Id =:context.installerID()];
String toAddress= u.Email;
String[] toAddresses = new String[]{toAddress};
Messaging.SingleEmailMessage mail =
new Messaging.SingleEmailMessage();
mail.setToAddresses(toAddresses);
mail.setReplyTo('support@package.dev');
mail.setSenderDisplayName('My Package Support');
mail.setSubject('Package install successful');
mail.setPlainTextBody('Thanks for installing the package.');
Messaging.sendEmail(new Messaging.Email[] { mail });
}
else
if(context.previousVersion().compareTo(new Version(1,0)) == 0) {
Survey__c obj = new Survey__c(name='Upgrading from Version 1.0');
insert(obj);
}
if(context.isUpgrade()) {
Survey__c obj = new Survey__c(name='Sample Survey during Upgrade');
insert obj;
}
if(context.isPush()) {
Survey__c obj = new Survey__c(name='Sample Survey during Push');
insert obj;
}
}
}
You can test a post install script using the new
testInstall method of the Test class. This method takes the following arguments.
- A class that implements the InstallHandler interface.
- A Version object that specifies the version number of the existing package.
- An optional Boolean value that is true if the installation is a push. The default is false.
This sample shows how to test a post install script
implemented in the PostInstallClass Apex
class.
@isTest
static void testInstallScript() {
PostInstallClass postinstall = new PostInstallClass();
Test.testInstall(postinstall, null);
Test.testInstall(postinstall, new Version(1,0), true);
List<Account> a = [Select id, name from Account where name ='Newco'];
System.assertEquals(1, a.size(), 'Account not found');
}