TryWorld
edab6ed492
* fix(settings): preserve unreadable configuration * fix(settings): make saves atomic and recover empty files
55 lines
1.4 KiB
Go
55 lines
1.4 KiB
Go
//go:build windows
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package settings
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import (
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"bytes"
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"errors"
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"os"
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"testing"
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"golang.org/x/sys/windows"
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)
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func TestSaveKeepsReadBlockedSettings(t *testing.T) {
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t.Setenv("XDG_CONFIG_HOME", t.TempDir())
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if err := os.MkdirAll(Dir(), 0o755); err != nil {
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t.Fatal(err)
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}
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original := []byte(`{"theme":"dark","githubToken":"SYNTHETIC_PRIVATE_TOKEN"}`)
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if err := os.WriteFile(Path(), original, 0o600); err != nil {
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t.Fatal(err)
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}
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name, err := windows.UTF16PtrFromString(Path())
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if err != nil {
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t.Fatal(err)
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}
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// Writes remain possible, but a reader cannot open this existing file.
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h, err := windows.CreateFile(name, windows.GENERIC_WRITE,
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windows.FILE_SHARE_WRITE|windows.FILE_SHARE_DELETE, nil,
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windows.OPEN_EXISTING, windows.FILE_ATTRIBUTE_NORMAL, 0)
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if err != nil {
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t.Fatal(err)
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}
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closed := false
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t.Cleanup(func() {
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if !closed {
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windows.CloseHandle(h)
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}
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})
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if _, err := os.ReadFile(Path()); !errors.Is(err, windows.ERROR_SHARING_VIOLATION) {
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t.Fatalf("the read restriction was not established: %v", err)
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}
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saved := Save(Settings{Theme: "light"})
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if err := windows.CloseHandle(h); err != nil {
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t.Fatal(err)
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}
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closed = true
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if !errors.Is(saved, windows.ERROR_SHARING_VIOLATION) {
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t.Errorf("Save returned %v, want the read-sharing error", saved)
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}
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if after, err := os.ReadFile(Path()); err != nil || !bytes.Equal(after, original) {
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t.Errorf("the read-blocked settings were overwritten: %v", err)
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}
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}
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