I woke up in the morning, is it in the sky, is it 7 o'clock? One look at the table, six o'clock, it wakes up. This is a test. I want to enter "Test", my hand knocked "Test" on the keyboard, eyes look at the screen Show "Test". This is also a test. There is still a back word, there is a test, and there are clothes, etc.
Test is not a new business, in life, in fact, we have been doing testing. (So testing should accompany software development iterative development "full process - demand, division analysis, design, and coding.)
Test, including measurement and trial. Measurement, mainly for quantization requirements. Trial, corresponding to non-quantization standards.
There are two tests, one is to test your own work (such as Unit Test), the other is to test the work of others (established Test Team). Why do you want to test a group? Independence is to better ensure objectivity and Improvement. So a perfect software development should include both tests.
