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litestream_test.go
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litestream_test.go
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package litestream_test
import (
"encoding/binary"
"encoding/hex"
"testing"
"github.com/benbjohnson/litestream"
_ "github.com/mattn/go-sqlite3"
)
func TestChecksum(t *testing.T) {
// Ensure a WAL header, frame header, & frame data can be checksummed in one pass.
t.Run("OnePass", func(t *testing.T) {
input, err := hex.DecodeString("377f0682002de218000010000000000052382eac857b1a4e00000002000000020d000000080fe0000ffc0ff80ff40ff00fec0fe80fe40fe00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000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if err != nil {
t.Fatal(err)
}
s0, s1 := litestream.Checksum(binary.LittleEndian, 0, 0, input)
if got, want := [2]uint32{s0, s1}, [2]uint32{0xdc2f3e84, 0x540488d3}; got != want {
t.Fatalf("Checksum()=%x, want %x", got, want)
}
})
// Ensure we get the same result as OnePass even if we split up into multiple calls.
t.Run("Incremental", func(t *testing.T) {
// Compute checksum for beginning of WAL header.
s0, s1 := litestream.Checksum(binary.LittleEndian, 0, 0, MustDecodeHexString("377f0682002de218000010000000000052382eac857b1a4e"))
if got, want := [2]uint32{s0, s1}, [2]uint32{0x81153b65, 0x87178e8f}; got != want {
t.Fatalf("Checksum()=%x, want %x", got, want)
}
// Continue checksum with WAL frame header & frame contents.
s0a, s1a := litestream.Checksum(binary.LittleEndian, s0, s1, MustDecodeHexString("0000000200000002"))
s0b, s1b := litestream.Checksum(binary.LittleEndian, s0a, s1a, MustDecodeHexString(`0d000000080fe0000ffc0ff80ff40ff00fec0fe80fe40fe000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000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if got, want := [2]uint32{s0b, s1b}, [2]uint32{0xdc2f3e84, 0x540488d3}; got != want {
t.Fatalf("Checksum()=%x, want %x", got, want)
}
})
}
func TestGenerationsPath(t *testing.T) {
t.Run("OK", func(t *testing.T) {
if got, want := litestream.GenerationsPath("foo"), "foo/generations"; got != want {
t.Fatalf("GenerationsPath()=%v, want %v", got, want)
}
})
t.Run("NoPath", func(t *testing.T) {
if got, want := litestream.GenerationsPath(""), "generations"; got != want {
t.Fatalf("GenerationsPath()=%v, want %v", got, want)
}
})
}
func TestGenerationPath(t *testing.T) {
t.Run("OK", func(t *testing.T) {
if got, err := litestream.GenerationPath("foo", "0123456701234567"); err != nil {
t.Fatal(err)
} else if want := "foo/generations/0123456701234567"; got != want {
t.Fatalf("GenerationPath()=%v, want %v", got, want)
}
})
t.Run("ErrNoGeneration", func(t *testing.T) {
if _, err := litestream.GenerationPath("foo", ""); err == nil || err.Error() != `generation required` {
t.Fatalf("expected error: %v", err)
}
})
}
func TestSnapshotsPath(t *testing.T) {
t.Run("OK", func(t *testing.T) {
if got, err := litestream.SnapshotsPath("foo", "0123456701234567"); err != nil {
t.Fatal(err)
} else if want := "foo/generations/0123456701234567/snapshots"; got != want {
t.Fatalf("SnapshotsPath()=%v, want %v", got, want)
}
})
t.Run("ErrNoGeneration", func(t *testing.T) {
if _, err := litestream.SnapshotsPath("foo", ""); err == nil || err.Error() != `generation required` {
t.Fatalf("unexpected error: %v", err)
}
})
}
func TestSnapshotPath(t *testing.T) {
t.Run("OK", func(t *testing.T) {
if got, err := litestream.SnapshotPath("foo", "0123456701234567", 1000); err != nil {
t.Fatal(err)
} else if want := "foo/generations/0123456701234567/snapshots/000003e8.snapshot.lz4"; got != want {
t.Fatalf("SnapshotPath()=%v, want %v", got, want)
}
})
t.Run("ErrNoGeneration", func(t *testing.T) {
if _, err := litestream.SnapshotPath("foo", "", 1000); err == nil || err.Error() != `generation required` {
t.Fatalf("unexpected error: %v", err)
}
})
}
func TestWALPath(t *testing.T) {
t.Run("OK", func(t *testing.T) {
if got, err := litestream.WALPath("foo", "0123456701234567"); err != nil {
t.Fatal(err)
} else if want := "foo/generations/0123456701234567/wal"; got != want {
t.Fatalf("WALPath()=%v, want %v", got, want)
}
})
t.Run("ErrNoGeneration", func(t *testing.T) {
if _, err := litestream.WALPath("foo", ""); err == nil || err.Error() != `generation required` {
t.Fatalf("unexpected error: %v", err)
}
})
}
func TestWALSegmentPath(t *testing.T) {
t.Run("OK", func(t *testing.T) {
if got, err := litestream.WALSegmentPath("foo", "0123456701234567", 1000, 1001); err != nil {
t.Fatal(err)
} else if want := "foo/generations/0123456701234567/wal/000003e8_000003e9.wal.lz4"; got != want {
t.Fatalf("WALPath()=%v, want %v", got, want)
}
})
t.Run("ErrNoGeneration", func(t *testing.T) {
if _, err := litestream.WALSegmentPath("foo", "", 1000, 0); err == nil || err.Error() != `generation required` {
t.Fatalf("unexpected error: %v", err)
}
})
}
func TestFindMinSnapshotByGeneration(t *testing.T) {
infos := []litestream.SnapshotInfo{
{Generation: "29cf4bced74e92ab", Index: 0},
{Generation: "5dfeb4aa03232553", Index: 24},
}
if got, want := litestream.FindMinSnapshotByGeneration(infos, "29cf4bced74e92ab"), &infos[0]; got != want {
t.Fatalf("info=%#v, want %#v", got, want)
}
}
func MustDecodeHexString(s string) []byte {
b, err := hex.DecodeString(s)
if err != nil {
panic(err)
}
return b
}