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test: use T.TempDir to create temporary test directory #1315

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merged 1 commit into from Aug 30, 2022
Merged

test: use T.TempDir to create temporary test directory #1315

merged 1 commit into from Aug 30, 2022

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Juneezee
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A testing cleanup.

This pull request replaces ioutil.TempDir with t.TempDir. We can use the T.TempDir function from the testing package to create temporary directory. The directory created by T.TempDir is automatically removed when the test and all its subtests complete.

This saves us at least 2 lines (error check, and cleanup) on every instance, or in some cases adds cleanup that we forgot.

Reference: https://pkg.go.dev/testing#T.TempDir

func TestFoo(t *testing.T) {
	// before
	tmpDir, err := ioutil.TempDir("", "")
	require.NoError(t, err)
	defer os.RemoveAll(tmpDir)

	// now
	tmpDir := t.TempDir()
}

This commit replaces `ioutil.TempDir` with `t.TempDir` in tests. The
directory created by `t.TempDir` is automatically removed when the test
and all its subtests complete.

Prior to this commit, temporary directory created using `ioutil.TempDir`
needs to be removed manually by calling `os.RemoveAll`, which is omitted
in some tests. The error handling boilerplate e.g.
	defer func() {
		if err := os.RemoveAll(dir); err != nil {
			t.Fatal(err)
		}
	}
is also tedious, but `t.TempDir` handles this for us nicely.

Reference: https://pkg.go.dev/testing#T.TempDir
Signed-off-by: Eng Zer Jun <engzerjun@gmail.com>
@Juneezee Juneezee marked this pull request as ready for review August 29, 2022 17:41
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@vrothberg vrothberg left a comment

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LGTM, thank you!

@giuseppe PTAL

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@giuseppe giuseppe left a comment

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LGTM

@giuseppe giuseppe merged commit a3c0839 into containers:main Aug 30, 2022
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3 participants