[SalesForce] Unit testing code which has logic around last login date of user

Spring '16 Release Notes document a new system method supporting this:

Test.setCreatedDate(recordId, createdDatetime)

Sets CreatedDate for a test-context sObject.

This will definitely complement the loadData() and deserialize() techniques.

Account account = new Account(Name = 'Test');
insert account;

Datetime yesterday = Datetime.now().addDays(-1);
Test.setCreatedDate(account.Id, yesterday);

I know this is a 'hack' but you may be able to call your batchable class methods inside your testmethod without running in a Database.executeBatch(...); method call. I have done this for a customer who needed higher test coverage; their batch apex was simple and didn't require the batchable context to be set.

TestCode:-

    MyBatchableClass mbc = new MyBatchableClass();

        List<MySObject__c> scope = {list of previously inserted objects};
        mbc.execute(null, scope);
        Test.startTest();
        WebServiceMockImpl mock = new WebServiceMockImpl();

        Test.setMock(WebServiceMock.class, mock);
        //Webservice call out in here
        mbc.finish(null);

        Test.stopTest();