56 lines
1.3 KiB
Go
56 lines
1.3 KiB
Go
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// SPDX-License-Identifier: MIT
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package fsx
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import (
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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 TestWriteFileAtomicCreatesAndReplaces(t *testing.T) {
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dir := t.TempDir()
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path := filepath.Join(dir, "nested", "file.json")
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if err := WriteFileAtomic(path, []byte("first"), 0o600); err != nil {
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t.Fatalf("WriteFileAtomic: %v", err)
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}
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got, err := os.ReadFile(path)
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if err != nil {
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t.Fatalf("ReadFile: %v", err)
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}
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if string(got) != "first" {
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t.Fatalf("content = %q, want %q", got, "first")
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}
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info, err := os.Stat(path)
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if err != nil {
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t.Fatalf("Stat: %v", err)
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}
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if info.Mode().Perm() != 0o600 {
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t.Fatalf("perm = %o, want 600", info.Mode().Perm())
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}
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if err := WriteFileAtomic(path, []byte("second"), 0o600); err != nil {
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t.Fatalf("second WriteFileAtomic: %v", err)
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}
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got, _ = os.ReadFile(path)
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if string(got) != "second" {
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t.Fatalf("content = %q, want %q", got, "second")
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}
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}
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func TestWriteFileAtomicLeavesNoTempFiles(t *testing.T) {
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dir := t.TempDir()
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path := filepath.Join(dir, "state.json")
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if err := WriteFileAtomic(path, []byte("x"), 0o644); err != nil {
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t.Fatalf("WriteFileAtomic: %v", err)
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}
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entries, err := os.ReadDir(dir)
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if err != nil {
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t.Fatalf("ReadDir: %v", err)
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}
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if len(entries) != 1 || entries[0].Name() != "state.json" {
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t.Fatalf("unexpected directory contents: %v", entries)
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}
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}
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