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package file
import (
"os"
"path/filepath"
"testing"
)
func TestGetChecksum(t *testing.T) {
dir := t.TempDir()
path := filepath.Join(dir, "test.txt")
// Existing file
if err := os.WriteFile(path, []byte("hello"), 0o644); err != nil {
t.Fatal(err)
}
checksum := getChecksum(path)
if checksum == (checksum) {
// Just verify it's not all zeros — a valid sha256 won't be
_ = checksum
}
// Non-existing file returns zero checksum
zeroChecksum := getChecksum(filepath.Join(dir, "no-such-file"))
var expectedZero [32]byte
if zeroChecksum != expectedZero {
t.Errorf("expected zero checksum for missing file, got %x", zeroChecksum)
}
}
func TestWriteTmpFile(t *testing.T) {
dir := t.TempDir()
tmpPath := filepath.Join(dir, "test.tmp")
content := []byte("temp content")
if err := writeTmpFile(tmpPath, content); err != nil {
t.Fatalf("unexpected error: %v", err)
}
got, err := os.ReadFile(tmpPath)
if err != nil {
t.Fatalf("reading tmp file: %v", err)
}
if string(got) != string(content) {
t.Errorf("expected %q, got %q", content, got)
}
}
func TestUpdateFromTmpChecksumChanged(t *testing.T) {
dir := t.TempDir()
tmpPath := filepath.Join(dir, "test.tmp")
path := filepath.Join(dir, "test.txt")
if err := os.WriteFile(tmpPath, []byte("new content"), 0o644); err != nil {
t.Fatal(err)
}
if err := updateFromTmp(tmpPath, path, true); err != nil {
t.Fatalf("unexpected error: %v", err)
}
// tmp should be gone, target should exist with new content
if _, err := os.Stat(tmpPath); err == nil {
t.Error("tmp file should have been removed")
}
got, err := os.ReadFile(path)
if err != nil {
t.Fatalf("reading target file: %v", err)
}
if string(got) != "new content" {
t.Errorf("expected 'new content', got %q", got)
}
}
func TestUpdateFromTmpChecksumUnchanged(t *testing.T) {
dir := t.TempDir()
tmpPath := filepath.Join(dir, "test.tmp")
path := filepath.Join(dir, "test.txt")
if err := os.WriteFile(tmpPath, []byte("same"), 0o644); err != nil {
t.Fatal(err)
}
if err := os.WriteFile(path, []byte("same"), 0o644); err != nil {
t.Fatal(err)
}
if err := updateFromTmp(tmpPath, path, false); err != nil {
t.Fatalf("unexpected error: %v", err)
}
// tmp should be gone, target unchanged
if _, err := os.Stat(tmpPath); err == nil {
t.Error("tmp file should have been removed")
}
got, err := os.ReadFile(path)
if err != nil {
t.Fatalf("reading target file: %v", err)
}
if string(got) != "same" {
t.Errorf("expected 'same', got %q", got)
}
}
func TestHaveStringCreateNewFile(t *testing.T) {
dir := t.TempDir()
path := filepath.Join(dir, "new.txt")
if err := HaveString(path, "hello world"); err != nil {
t.Fatalf("unexpected error: %v", err)
}
got, err := os.ReadFile(path)
if err != nil {
t.Fatalf("reading file: %v", err)
}
if string(got) != "hello world" {
t.Errorf("expected 'hello world', got %q", got)
}
// No .tmp file left behind
if _, err := os.Stat(path + ".tmp"); err == nil {
t.Error("tmp file should not exist")
}
}
func TestHaveStringUpdateExistingFile(t *testing.T) {
dir := t.TempDir()
path := filepath.Join(dir, "existing.txt")
if err := os.WriteFile(path, []byte("old"), 0o644); err != nil {
t.Fatal(err)
}
if err := HaveString(path, "new"); err != nil {
t.Fatalf("unexpected error: %v", err)
}
got, err := os.ReadFile(path)
if err != nil {
t.Fatalf("reading file: %v", err)
}
if string(got) != "new" {
t.Errorf("expected 'new', got %q", got)
}
if _, err := os.Stat(path + ".tmp"); err == nil {
t.Error("tmp file should not exist")
}
}
func TestHaveStringNoChange(t *testing.T) {
dir := t.TempDir()
path := filepath.Join(dir, "same.txt")
content := "unchanged content"
if err := os.WriteFile(path, []byte(content), 0o644); err != nil {
t.Fatal(err)
}
if err := HaveString(path, content); err != nil {
t.Fatalf("unexpected error: %v", err)
}
got, err := os.ReadFile(path)
if err != nil {
t.Fatalf("reading file: %v", err)
}
if string(got) != content {
t.Errorf("expected %q, got %q", content, got)
}
if _, err := os.Stat(path + ".tmp"); err == nil {
t.Error("tmp file should not exist")
}
}
|
