A while ago I answered the following question on SearchSoftwareQuality.com’s Ask The Software Quality Expert: Questions & Answers.

I'm working as an IT engineer and I have a software integration testing question. I have very low-level requirements which match directly to a function or some statements of function -- that is, a group of requirements matches to one function. I want to do software integration testing for the above requirements. Can you please suggest to me how integration testing is possible? I want to know the testing approach.

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When talking about your question with Dale Emery, Dale pointed out that for him, one of the fundamental ideas for integration testing is the idea of disagreement between various parts of the system. That is, if we believe part X does its specific function well (hopefully based on some level of unit testing) and part Y does its specific function well, then when we put them together and test we're looking for ways in which there is conflict or unintended consequences between the two. The less certain we are about the different parts we'll be testing, or the lower our confidence in how those two parts will interact, the more integration testing we might want to do.

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A while ago I answered the following question on SearchSoftwareQuality.com’s Ask The Software Quality Expert: Questions & Answers.

Can you please tell me which tools are suitable for load and stress testing?

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I've found all of those tools to be good solutions, depending on what I was testing. Along with each of those tools, I often use a host of monitoring tools, anything from the simple like Perfmon to the complex like CA Wily Introscope . If I had to choose one for Web services testing, I'd probably choose soapUI. If I had to choose one for websites, I like IBM Rational Performance Tester. For everything else under the sun, HP Mercury LoadRunner probably has a plug-in that supports it. In general I prefer open source to commercial, but if the commercial solution is a better solution for my problem, I'll pay up.

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