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1cd7490281
Perform chmod before rename with the atomic file writer. Ensure writeErr is set on short write and file is removed on write error. Signed-off-by: Derek McGowan <derek@mcgstyle.net> (github: dmcgowan)
39 lines
957 B
Go
39 lines
957 B
Go
package ioutils
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import (
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"bytes"
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"io/ioutil"
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"os"
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"path/filepath"
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"testing"
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)
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func TestAtomicWriteToFile(t *testing.T) {
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tmpDir, err := ioutil.TempDir("", "atomic-writers-test")
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if err != nil {
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t.Fatalf("Error when creating temporary directory: %s", err)
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}
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defer os.RemoveAll(tmpDir)
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expected := []byte("barbaz")
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if err := AtomicWriteFile(filepath.Join(tmpDir, "foo"), expected, 0666); err != nil {
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t.Fatalf("Error writing to file: %v", err)
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}
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actual, err := ioutil.ReadFile(filepath.Join(tmpDir, "foo"))
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if err != nil {
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t.Fatalf("Error reading from file: %v", err)
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}
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if bytes.Compare(actual, expected) != 0 {
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t.Fatalf("Data mismatch, expected %q, got %q", expected, actual)
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}
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st, err := os.Stat(filepath.Join(tmpDir, "foo"))
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if err != nil {
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t.Fatalf("Error statting file: %v", err)
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}
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if expected := os.FileMode(0666); st.Mode() != expected {
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t.Fatalf("Mode mismatched, expected %o, got %o", expected, st.Mode())
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}
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}
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