|
| 1 | +package fsutil |
| 2 | + |
| 3 | +import ( |
| 4 | + "os" |
| 5 | + "path/filepath" |
| 6 | + "testing" |
| 7 | +) |
| 8 | + |
| 9 | +func TestAtomicWriteCreatesFile(t *testing.T) { |
| 10 | + t.Parallel() |
| 11 | + dir := t.TempDir() |
| 12 | + path := filepath.Join(dir, "test.json") |
| 13 | + |
| 14 | + data := []byte(`{"key":"value"}`) |
| 15 | + if err := AtomicWrite(path, data); err != nil { |
| 16 | + t.Fatalf("AtomicWrite: %v", err) |
| 17 | + } |
| 18 | + |
| 19 | + got, err := os.ReadFile(path) |
| 20 | + if err != nil { |
| 21 | + t.Fatalf("ReadFile: %v", err) |
| 22 | + } |
| 23 | + if string(got) != string(data) { |
| 24 | + t.Fatalf("content mismatch: %q", got) |
| 25 | + } |
| 26 | +} |
| 27 | + |
| 28 | +func TestAtomicWritePermissions0600(t *testing.T) { |
| 29 | + t.Parallel() |
| 30 | + dir := t.TempDir() |
| 31 | + path := filepath.Join(dir, "perms.json") |
| 32 | + |
| 33 | + if err := AtomicWrite(path, []byte("secret")); err != nil { |
| 34 | + t.Fatalf("AtomicWrite: %v", err) |
| 35 | + } |
| 36 | + |
| 37 | + info, err := os.Stat(path) |
| 38 | + if err != nil { |
| 39 | + t.Fatalf("Stat: %v", err) |
| 40 | + } |
| 41 | + if perm := info.Mode().Perm(); perm != 0600 { |
| 42 | + t.Fatalf("expected 0600, got %04o", perm) |
| 43 | + } |
| 44 | +} |
| 45 | + |
| 46 | +func TestAtomicWriteOverwrite(t *testing.T) { |
| 47 | + t.Parallel() |
| 48 | + dir := t.TempDir() |
| 49 | + path := filepath.Join(dir, "overwrite.json") |
| 50 | + |
| 51 | + if err := AtomicWrite(path, []byte("first")); err != nil { |
| 52 | + t.Fatalf("first write: %v", err) |
| 53 | + } |
| 54 | + if err := AtomicWrite(path, []byte("second")); err != nil { |
| 55 | + t.Fatalf("second write: %v", err) |
| 56 | + } |
| 57 | + |
| 58 | + got, err := os.ReadFile(path) |
| 59 | + if err != nil { |
| 60 | + t.Fatalf("ReadFile: %v", err) |
| 61 | + } |
| 62 | + if string(got) != "second" { |
| 63 | + t.Fatalf("expected 'second', got %q", got) |
| 64 | + } |
| 65 | + |
| 66 | + // Permissions still 0600 after overwrite |
| 67 | + info, _ := os.Stat(path) |
| 68 | + if perm := info.Mode().Perm(); perm != 0600 { |
| 69 | + t.Fatalf("expected 0600 after overwrite, got %04o", perm) |
| 70 | + } |
| 71 | +} |
| 72 | + |
| 73 | +func TestAtomicWriteNoTempFileRemains(t *testing.T) { |
| 74 | + t.Parallel() |
| 75 | + dir := t.TempDir() |
| 76 | + path := filepath.Join(dir, "clean.json") |
| 77 | + |
| 78 | + if err := AtomicWrite(path, []byte("data")); err != nil { |
| 79 | + t.Fatalf("AtomicWrite: %v", err) |
| 80 | + } |
| 81 | + |
| 82 | + if _, err := os.Stat(path + ".tmp"); !os.IsNotExist(err) { |
| 83 | + t.Fatal("temp file should not exist after successful write") |
| 84 | + } |
| 85 | +} |
| 86 | + |
| 87 | +func TestAtomicWriteEmptyData(t *testing.T) { |
| 88 | + t.Parallel() |
| 89 | + dir := t.TempDir() |
| 90 | + path := filepath.Join(dir, "empty.json") |
| 91 | + |
| 92 | + if err := AtomicWrite(path, []byte{}); err != nil { |
| 93 | + t.Fatalf("AtomicWrite empty: %v", err) |
| 94 | + } |
| 95 | + |
| 96 | + got, err := os.ReadFile(path) |
| 97 | + if err != nil { |
| 98 | + t.Fatalf("ReadFile: %v", err) |
| 99 | + } |
| 100 | + if len(got) != 0 { |
| 101 | + t.Fatalf("expected empty file, got %d bytes", len(got)) |
| 102 | + } |
| 103 | +} |
| 104 | + |
| 105 | +func TestAtomicWriteLargeData(t *testing.T) { |
| 106 | + t.Parallel() |
| 107 | + dir := t.TempDir() |
| 108 | + path := filepath.Join(dir, "large.json") |
| 109 | + |
| 110 | + data := make([]byte, 1<<20) // 1MB |
| 111 | + for i := range data { |
| 112 | + data[i] = byte(i % 256) |
| 113 | + } |
| 114 | + |
| 115 | + if err := AtomicWrite(path, data); err != nil { |
| 116 | + t.Fatalf("AtomicWrite: %v", err) |
| 117 | + } |
| 118 | + |
| 119 | + got, err := os.ReadFile(path) |
| 120 | + if err != nil { |
| 121 | + t.Fatalf("ReadFile: %v", err) |
| 122 | + } |
| 123 | + if len(got) != len(data) { |
| 124 | + t.Fatalf("size mismatch: %d != %d", len(got), len(data)) |
| 125 | + } |
| 126 | +} |
| 127 | + |
| 128 | +func TestAtomicWriteBadDirectory(t *testing.T) { |
| 129 | + t.Parallel() |
| 130 | + err := AtomicWrite("/nonexistent/dir/file.json", []byte("data")) |
| 131 | + if err == nil { |
| 132 | + t.Fatal("expected error for nonexistent directory") |
| 133 | + } |
| 134 | +} |
| 135 | + |
| 136 | +func TestAppendSyncCreatesFile(t *testing.T) { |
| 137 | + t.Parallel() |
| 138 | + dir := t.TempDir() |
| 139 | + path := filepath.Join(dir, "append.log") |
| 140 | + |
| 141 | + if err := AppendSync(path, []byte("line1\n")); err != nil { |
| 142 | + t.Fatalf("AppendSync: %v", err) |
| 143 | + } |
| 144 | + |
| 145 | + got, err := os.ReadFile(path) |
| 146 | + if err != nil { |
| 147 | + t.Fatalf("ReadFile: %v", err) |
| 148 | + } |
| 149 | + if string(got) != "line1\n" { |
| 150 | + t.Fatalf("expected 'line1\\n', got %q", got) |
| 151 | + } |
| 152 | +} |
| 153 | + |
| 154 | +func TestAppendSyncAppends(t *testing.T) { |
| 155 | + t.Parallel() |
| 156 | + dir := t.TempDir() |
| 157 | + path := filepath.Join(dir, "multi.log") |
| 158 | + |
| 159 | + if err := AppendSync(path, []byte("a\n")); err != nil { |
| 160 | + t.Fatalf("first AppendSync: %v", err) |
| 161 | + } |
| 162 | + if err := AppendSync(path, []byte("b\n")); err != nil { |
| 163 | + t.Fatalf("second AppendSync: %v", err) |
| 164 | + } |
| 165 | + |
| 166 | + got, err := os.ReadFile(path) |
| 167 | + if err != nil { |
| 168 | + t.Fatalf("ReadFile: %v", err) |
| 169 | + } |
| 170 | + if string(got) != "a\nb\n" { |
| 171 | + t.Fatalf("expected 'a\\nb\\n', got %q", got) |
| 172 | + } |
| 173 | +} |
| 174 | + |
| 175 | +func TestAppendSyncPermissions0600(t *testing.T) { |
| 176 | + t.Parallel() |
| 177 | + dir := t.TempDir() |
| 178 | + path := filepath.Join(dir, "perms.log") |
| 179 | + |
| 180 | + if err := AppendSync(path, []byte("x")); err != nil { |
| 181 | + t.Fatalf("AppendSync: %v", err) |
| 182 | + } |
| 183 | + |
| 184 | + info, err := os.Stat(path) |
| 185 | + if err != nil { |
| 186 | + t.Fatalf("Stat: %v", err) |
| 187 | + } |
| 188 | + if perm := info.Mode().Perm(); perm != 0600 { |
| 189 | + t.Fatalf("expected 0600, got %04o", perm) |
| 190 | + } |
| 191 | +} |
| 192 | + |
| 193 | +func TestAppendSyncBadDirectory(t *testing.T) { |
| 194 | + t.Parallel() |
| 195 | + err := AppendSync("/nonexistent/dir/file.log", []byte("data")) |
| 196 | + if err == nil { |
| 197 | + t.Fatal("expected error for nonexistent directory") |
| 198 | + } |
| 199 | +} |
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