It's quiet plain to me this question doesn't really concern the Spring framework, but as I've read the testing reference [1] I wondered what integration testing is about? If all components work as expected why should fail something when "glueing" those together?

Are there any further statements describing integration testing except Wikipedia [2].

greets

[1]: http://www.springframework.org/docs/...e/testing.html
[2]: http://en.wikipedia.org/wiki/Integration_testing