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91 lines
1.8 KiB
91 lines
1.8 KiB
package common
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import (
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"bytes"
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"io/ioutil"
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"math/rand"
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"os"
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"testing"
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"time"
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)
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func TestWriteFileAtomic(t *testing.T) {
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var (
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seed = rand.New(rand.NewSource(time.Now().UnixNano()))
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data = []byte(RandStr(seed.Intn(2048)))
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old = RandBytes(seed.Intn(2048))
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perm os.FileMode = 0600
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)
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f, err := ioutil.TempFile("/tmp", "write-atomic-test-")
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if err != nil {
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t.Fatal(err)
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}
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defer os.Remove(f.Name())
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if err := ioutil.WriteFile(f.Name(), old, 0664); err != nil {
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t.Fatal(err)
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}
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if err := WriteFileAtomic(f.Name(), data, perm); err != nil {
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t.Fatal(err)
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}
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rData, err := ioutil.ReadFile(f.Name())
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if err != nil {
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t.Fatal(err)
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}
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if !bytes.Equal(data, rData) {
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t.Fatalf("data mismatch: %v != %v", data, rData)
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}
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stat, err := os.Stat(f.Name())
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if err != nil {
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t.Fatal(err)
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}
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if have, want := stat.Mode().Perm(), perm; have != want {
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t.Errorf("have %v, want %v", have, want)
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}
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}
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func TestGoPath(t *testing.T) {
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// restore original gopath upon exit
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path := os.Getenv("GOPATH")
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defer func() {
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_ = os.Setenv("GOPATH", path)
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}()
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err := os.Setenv("GOPATH", "~/testgopath")
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if err != nil {
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t.Fatal(err)
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}
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path = GoPath()
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if path != "~/testgopath" {
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t.Fatalf("should get GOPATH env var value, got %v", path)
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}
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os.Unsetenv("GOPATH")
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path = GoPath()
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if path != "~/testgopath" {
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t.Fatalf("subsequent calls should return the same value, got %v", path)
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}
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}
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func TestGoPathWithoutEnvVar(t *testing.T) {
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// restore original gopath upon exit
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path := os.Getenv("GOPATH")
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defer func() {
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_ = os.Setenv("GOPATH", path)
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}()
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os.Unsetenv("GOPATH")
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// reset cache
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gopath = ""
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path = GoPath()
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if path == "" || path == "~/testgopath" {
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t.Fatalf("should get nonempty result of calling go env GOPATH, got %v", path)
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}
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}
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