The unit tests run as the user that started the test. You can also use the System.runAs method to run the code as different users. See the example below which creates a new user and then runs the code as that user.
@isTest
private class TestRunAs {
public static testMethod void testRunAs() {
// Setup test data
// This code runs as the system user
Profile p = [SELECT Id FROM Profile WHERE Name='Standard User'];
User u = new User(Alias = 'standt', Email='[email protected]',
EmailEncodingKey='UTF-8', LastName='Testing', LanguageLocaleKey='en_US',
LocaleSidKey='en_US', ProfileId = p.Id,
TimeZoneSidKey='America/Los_Angeles', UserName='[email protected]');
System.runAs(u) {
// The following code runs as user 'u'
System.debug('Current User: ' + UserInfo.getUserName());
System.debug('Current Profile: ' + UserInfo.getProfileId());
}
}
}