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go/packages: make a copy of the config.Env slice in the test.

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Before this change, we were "saving" config.Env and then appending
to it to create a new slice, like so:

  savedEnv := config.Env
  ...
  // for each test case
    config.Env = append(savedEnv, additionalValue)

but we're modifying savedEnv during each env. Even though it might
work, it's not doing what we expect. Clean this up.

Change-Id: Idcf8199d836241df2b934308863512c566c0c485
Reviewed-on: https://go-review.googlesource.com/c/tools/+/200769
Run-TryBot: Michael Matloob <matloob@golang.org>
Run-TryBot: Rebecca Stambler <rstambler@golang.org>
Reviewed-by: Rebecca Stambler <rstambler@golang.org>
This commit is contained in:
Michael Matloob 2019-10-11 16:49:23 -04:00
parent 7667e13ae9
commit 4c025a95b2
1 changed files with 4 additions and 2 deletions
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6
go/packages/packages_test.go
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@ -1951,7 +1951,6 @@ EOF
} else {
pathWithDriver = binDir
}
coreEnv := exported.Config.Env
for _, test := range []struct {
desc string
path string
@ -1979,7 +1978,10 @@ EOF
oldPath := os.Getenv(pathKey)
os.Setenv(pathKey, test.path)
defer os.Setenv(pathKey, oldPath)
exported.Config.Env = append(coreEnv, "GOPACKAGESDRIVER="+test.driver)
// Clone exported.Config
config := exported.Config
config.Env = append([]string{}, exported.Config.Env...)
config.Env = append(config.Env, "GOPACKAGESDRIVER="+test.driver)
pkgs, err := packages.Load(exported.Config, "golist")
if err != nil {
t.Fatal(err)