test: use T.TempDir to create temporary test directory
#1918
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The directory created by `T.TempDir` is automatically removed when the test and all its subtests complete. Reference: https://pkg.go.dev/testing#T.TempDir Signed-off-by: Eng Zer Jun <engzerjun@gmail.com>
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Description
We can write less code by using the
T.TempDirfunction from thetestingpackage to create temporary directory. The directory created byT.TempDiris automatically removed when the test and all its subtests complete.Reference: https://pkg.go.dev/testing#T.TempDir
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