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import (
"fmt"
"io/ioutil"
"log"
"os"
"testing"
"time"
pb "git.autistici.org/ai3/tools/replds2/proto"
)
type testMap struct {
m map[string]*pb.Node
}
func (m *testMap) set(node *pb.Node) error {
m.m[node.Path] = node
return nil
}
func (m *testMap) dump(f func(*pb.Node) error) error {
for _, node := range m.m {
if err := f(node); err != nil {
return err
}
}
return nil
}
func TestLog(t *testing.T) {
// Make smaller log files
maxLogSize = 1024 * 1024
dir, err := ioutil.TempDir("", "")
if err != nil {
t.Fatal(err)
}
defer os.RemoveAll(dir)
m := &testMap{m: make(map[string]*pb.Node)}
l, err := openLog(dir, m.set, m.dump)
if err != nil {
t.Fatal(err)
}
// Create a bunch of entries, with repeated updates.
log.Printf(">>> writing test entries...")
numEntries := 100000
maxSz := 5000
for i := 0; i < numEntries; i++ {
node := &pb.Node{
Path: fmt.Sprintf("/path/to/%08d", (i % maxSz)),
Version: int64(time.Now().Unix()),
Data: []byte("just some random data, blah blah, blah blah!"),
}
if err := l.Write(node); err != nil {
t.Fatal(err)
}
m.set(node)
}
// We should be now on log #8.
if l.curIdx != 8 {
t.Fatalf("expected to be on log #9, actually #%d", l.curIdx)
}
log.Printf(">>> forcing a checkpoint...")
if err := l.Rotate(true, m.dump); err != nil {
t.Fatal(err)
}
// Ensure that there is a single log file post checkpoint.
if n := len(listLogfiles(l.path)); n != 1 {
t.Fatalf("expected just a single log after checkpoint, found %d", n)
}
// Now we close the log, and re-open it.
log.Printf(">>> closing and re-opening log...")
l.Close()
m = &testMap{m: make(map[string]*pb.Node)}
l, err = openLog(dir, m.set, m.dump)
if err != nil {
t.Fatal(err)
}
testPath := fmt.Sprintf("/path/to/%08d", 10)
value, ok := m.m[testPath]
if !ok {
t.Fatalf("expected value not found post reload")
}
// Modify the log, close it and reopen it, expecting it to be
// dirty, and re-checkpointing on open.
log.Printf(">>> writing new data, closing and re-opening log...")
l.Write(&pb.Node{
Path: testPath,
Version: int64(time.Now().Unix()),
Data: []byte("new data"),
})
l.Close()
m = &testMap{m: make(map[string]*pb.Node)}
l, err = openLog(dir, m.set, m.dump)
if err != nil {
t.Fatal(err)
}
value, ok = m.m[testPath]
if !ok {
t.Fatal("expected value not found post reload")
}
if s := string(value.Data); s != "new data" {
t.Fatalf("data of %s is wrong post-reload: %s", testPath, s)
}
l.Close()
}