Find the source code location of the Fabric ledger file

The source code location of Fabric's account book file is as follows:

There is a test file in this directory. Use the following commands to test and observe the test results.

The test log shows that a folder /tmp/lstoreXXXXX will be created during the test. However, after the test is over, this folder cannot be seen. The reason is that there is a statement in the test function of store_test.go that deletes this folder. After commenting this sentence and testing again, you can see the ledger file generated by the test.