Junit itself does not have a special place. Here is a six test items that are for different test objects or can be said to be a target. Test Case: This is the most common, that is, testing the program code. Test Suite: This higher level, you can test multiple classes at once. Its effect is the same as each of the plurality of TestCases, respectively. JDBC FixTure: This is a test for database links. (I used to use, I don't understand.) I learned the default JDBC database. JNDI FIXTURE: This is equivalent to a container test. If the main content is to test the FixTure that stores links. When programming, some commonly used links are often placed in a stuff similar to the container, so that if you call repeated calls, you can call the container address, then specifically point to the link inside. Is this a management? ^ _ ^ Comparision fixture: This is also a relatively small Dongdong. Custom fixTure: This is a custom setting. Just generate a framework.