1. If I have a class A with four methods of addition, deletion, modification and query, do I have to write all four methods in one test class when I write a unit test?
2. If written in a test class, then

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3. Then inserting data in step 2 can be done a lot
4. Edit, the query will certainly be done according to the conditions, then how to combine the parameters in the input parameters? I understand whether there are any complete examples written by
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