What does dva-loading do in front-end testing?

recently, when testing a project created with dva, I used jest+enzyme, to report an error when testing LoginPage components: I simulated store with redux-mock-store, but loading didn"t know how to deal with it. Please point out

if the question is not clear.
Test javascript
Sep.10,2021

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MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1e47924-431f6.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1e47924-431f6.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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