Apex Developer Guide

Apex Developer Guide
Getting Started with Apex
Writing Apex
Running Apex
Debugging, Testing, and Deploying Apex
Debugging Apex
Testing Apex
Understanding Testing in Apex
What to Test in Apex
What are Apex Unit Tests?
Understanding Test Data
Isolation of Test Data from Organization Data in Unit Tests
Using the isTest(SeeAllData=true) Annotation
Loading Test Data
Common Test Utility Classes for Test Data Creation
Using Test Setup Methods
Run Unit Test Methods
Testing Best Practices
Testing Example
Testing and Code Coverage
Code Coverage Best Practices
Build a Mocking Framework with the Stub API
Deploying Apex
Distributing Apex Using Managed Packages
Apex Language Reference
Appendices
Glossary
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Using the isTest(SeeAllData=true) Annotation

Annotate your test class or test method with IsTest(SeeAllData=true) to open up data access to records in your organization.
This example shows how to define a test class with the @isTest(SeeAllData=true) annotation. All the test methods in this class have access to all data in the organization.
This second example shows how to apply the @isTest(SeeAllData=true) annotation on a test method. Because the test method’s class isn’t annotated, you have to annotate the method to enable access to all data for the method. The second test method doesn’t have this annotation, so it can access only the data it creates. In addition, it can access objects that are used to manage your organization, such as users.
Considerations for the @IsTest(SeeAllData=true) Annotation
  • If a test class is defined with the @isTest(SeeAllData=true) annotation, the annotation applies to all its test methods whether the test methods are defined with the @isTest annotation or the (deprecated) testMethod keyword.
  • The @isTest(SeeAllData=true) annotation is used to open up data access when applied at the class or method level. However, if the containing class has been annotated with @isTest(SeeAllData=true), annotating a method with @isTest(SeeAllData=false) is ignored for that method. In this case, that method still has access to all the data in the organization. Annotating a method with @isTest(SeeAllData=true) overrides, for that method, an @isTest(SeeAllData=false) annotation on the class.
  • @isTest(SeeAllData=true) and @isTest(isParallel=true) annotations cannot be used together on the same Apex method.