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// Copyright (c) HashiCorp, Inc.
// SPDX-License-Identifier: MPL-2.0
package raft
import (
"bytes"
"io"
"reflect"
"testing"
)
func TestInmemSnapshotStoreImpl(t *testing.T) {
var impl interface{} = &InmemSnapshotStore{}
if _, ok := impl.(SnapshotStore); !ok {
t.Fatalf("InmemSnapshotStore not a SnapshotStore")
}
}
func TestInmemSnapshotSinkImpl(t *testing.T) {
var impl interface{} = &InmemSnapshotSink{}
if _, ok := impl.(SnapshotSink); !ok {
t.Fatalf("InmemSnapshotSink not a SnapshotSink")
}
}
func TestInmemSS_CreateSnapshot(t *testing.T) {
snap := NewInmemSnapshotStore()
// Check no snapshots
snaps, err := snap.List()
if err != nil {
t.Fatalf("err: %v", err)
}
if len(snaps) != 0 {
t.Fatalf("did not expect any snapshots: %v", snaps)
}
// Create a new sink
var configuration Configuration
configuration.Servers = append(configuration.Servers, Server{
Suffrage: Voter,
ID: ServerID("my id"),
Address: ServerAddress("over here"),
})
_, trans := NewInmemTransport(NewInmemAddr())
sink, err := snap.Create(SnapshotVersionMax, 10, 3, configuration, 2, trans)
if err != nil {
t.Fatalf("err: %v", err)
}
// The sink is not done, should not be in a list!
snaps, err = snap.List()
if err != nil {
t.Fatalf("err: %v", err)
}
if len(snaps) != 1 {
t.Fatalf("should always be 1 snapshot: %v", snaps)
}
// Write to the sink
_, err = sink.Write([]byte("first\n"))
if err != nil {
t.Fatalf("err: %v", err)
}
_, err = sink.Write([]byte("second\n"))
if err != nil {
t.Fatalf("err: %v", err)
}
// Done!
err = sink.Close()
if err != nil {
t.Fatalf("err: %v", err)
}
// Should have a snapshot!
snaps, err = snap.List()
if err != nil {
t.Fatalf("err: %v", err)
}
if len(snaps) != 1 {
t.Fatalf("expect a snapshots: %v", snaps)
}
// Check the latest
latest := snaps[0]
if latest.Index != 10 {
t.Fatalf("bad snapshot: %v", *latest)
}
if latest.Term != 3 {
t.Fatalf("bad snapshot: %v", *latest)
}
if !reflect.DeepEqual(latest.Configuration, configuration) {
t.Fatalf("bad snapshot: %v", *latest)
}
if latest.ConfigurationIndex != 2 {
t.Fatalf("bad snapshot: %v", *latest)
}
if latest.Size != 13 {
t.Fatalf("bad snapshot: %v", *latest)
}
// Read the snapshot
_, r, err := snap.Open(latest.ID)
if err != nil {
t.Fatalf("err: %v", err)
}
// Read out everything
var buf bytes.Buffer
if _, err := io.Copy(&buf, r); err != nil {
t.Fatalf("err: %v", err)
}
if err := r.Close(); err != nil {
t.Fatalf("err: %v", err)
}
// Ensure a match
if bytes.Compare(buf.Bytes(), []byte("first\nsecond\n")) != 0 {
t.Fatalf("content mismatch")
}
}
func TestInmemSS_OpenSnapshotTwice(t *testing.T) {
snap := NewInmemSnapshotStore()
// Create a new sink
var configuration Configuration
configuration.Servers = append(configuration.Servers, Server{
Suffrage: Voter,
ID: ServerID("my id"),
Address: ServerAddress("over here"),
})
_, trans := NewInmemTransport(NewInmemAddr())
sink, err := snap.Create(SnapshotVersionMax, 10, 3, configuration, 2, trans)
if err != nil {
t.Fatalf("err: %v", err)
}
// Write to the sink
_, err = sink.Write([]byte("data\n"))
if err != nil {
t.Fatalf("err: %v", err)
}
err = sink.Close()
if err != nil {
t.Fatalf("err: %v", err)
}
// Read the snapshot a first time
_, r, err := snap.Open(sink.ID())
if err != nil {
t.Fatalf("err: %v", err)
}
// Read out everything
var buf1 bytes.Buffer
if _, err = io.Copy(&buf1, r); err != nil {
t.Fatalf("err: %v", err)
}
if err = r.Close(); err != nil {
t.Fatalf("err: %v", err)
}
// Ensure a match
if bytes.Compare(buf1.Bytes(), []byte("data\n")) != 0 {
t.Fatalf("content mismatch")
}
// Read the snapshot a second time.
_, r, err = snap.Open(sink.ID())
if err != nil {
t.Fatalf("err: %v", err)
}
// Read out everything again
var buf2 bytes.Buffer
if _, err := io.Copy(&buf2, r); err != nil {
t.Fatalf("err: %v", err)
}
if err := r.Close(); err != nil {
t.Fatalf("err: %v", err)
}
// Ensure it's still the same content
if bytes.Compare(buf2.Bytes(), []byte("data\n")) != 0 {
t.Fatalf("content mismatch")
}
}
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