Best Practices for Data Generator Based Tests? - ng.asp-net-forum.visual_studio_2005

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	sideout
	Asp.Net User

Best Practices for Data Generator Based Tests?

2/12/2007 4:46:46 PM

0/0

I'm having a bit of a hard time grasping how to make meaningful tests based on the randomly generated data feature of VSTS for DB Professionals vs making my test in a transaction where I feed it initial data and check for an expected outcome.

For example's sake if I had an SP called DivideTwoCols that would divide colA by colB in table0...

If I were making tests with known data, I'd probably make a test using two positives, one negative and one positive, two negatives, colA = 0, colB = 0, and no rows in table0.

If I were just testing randomly generated data how would I know I had my cases covered? would the random test just pick a random row to try it with using select top 1 colA, colB from table0 order by newid()?

I can appreciate throwing in some randomness in testing to check for conditions you may have forgotten to check for, but it seems fairly hit or miss and not a reliable indicator that I'm checking all things properly.

Am I missing some core idea or plan for using random testing? Are there any tutorials, best practices, sites available that go over ideas on random testing with the generator?

	sideout
	Asp.Net User

Re: Best Practices for Data Generator Based Tests?

2/12/2007 5:37:26 PM

0/0

The example in the documentation was so contrived that it did not help me understand the usage any better.

http://msdn2.microsoft.com/en-us/library/aa833283(VS.80).aspx

Based on their example maybe their data generation plan would randomly have Seattle added and the test would pass, or maybe it wouldn't with a different seed or # of rows and the test would fail.

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