Apex SandboxPostCopy example

SandboxPostCopyUpd.cls

global without sharing class SandboxPostCopyUpd implements SandboxPostCopy {
    global void runApexClass(SandboxContext context) {
        LIst<Contact> ConList = [SELECT ID FROM CONTACT];
        for (Contact con : ConList) {
            con.Email = 'dummy@example.com';
        }
        update ConList;
    }
}

SandboxPostCopyUpd_test.cls

@isTest
public class SandboxPostCopyUpd_test {
	static testMethod void testSandboxPostCopyScript() {
        Account acct = new Account (Name='Acme');
        insert acct;
        Contact con = new Contact (FirstName='Yamada',LastName='Taro',AccountId=acct.Id,Email='Yamada@example.com');
        insert con;
		Test.testSandboxPostCopyScript(new SandboxPostCopyUpd(), '00D000000001111', '00D000000002222', 'sandboxName');
		System.assertEquals(0,[SELECT count() FROM CONTACT WHERE Email !='dummy@example.com']);
    }
}