Attempt to create Standard Pricebook2 via JSON deserialize... fail sadly...

gistfile1.cls

@IsTest
private with sharing class TestPricebook {
	@IsTest private static void testPricebook()
	{
		System.assertEquals(0, [select Id from Pricebook2 where IsStandard = true].size());		
		Pricebook2 pb = (Pricebook2) JSON.deserialize('{"Name":"Standard", "IsStandard":"true"}', Pricebook2.class);
		System.assertEquals(true, pb.IsStandard);
		insert pb;
		System.assertEquals(1, [select Id from Pricebook2 where IsStandard = true].size());		
	}
}

Haha, I was thinking about trying that out, just didn't get around to it. At least now I know, pity though, it would have been sweet to be able to write tests without SeeAllData on.

I've used JSON deserialize for writing to CreatedDate and and LastModifiedDate fields and it works a treat. I was wondering if it would work for formula fields too, have you tried this?