// // Tests that merge iterator over a wal returns points order correctly.
func TestMergeIteragor_Single(t *testing.T) {
dir := MustTempDir()
defer os.RemoveAll(dir)
v1 := tsm1.NewValue(time.Unix(1, 0), float64(1))
v2 := tsm1.NewValue(time.Unix(2, 0), float64(2))
points := map[string][]tsm1.Value{
"cpu,host=A#!~#value": []tsm1.Value{v1, v2},
}
entries := []tsm1.WALEntry{
&tsm1.WriteWALEntry{
Values: points,
},
}
r := MustWALSegment(dir, entries)
iter, err := tsm1.NewWALKeyIterator(r)
if err != nil {
t.Fatalf("unexpected error creating WALKeyIterator: %v", err)
}
// Read should return a chunk of 1 value
m := tsm1.NewMergeIterator(iter, 1)
var readValues bool
for _, p := range points {
if !m.Next() {
t.Fatalf("expected next, got false")
}
key, values, err := m.Read()
if err != nil {
t.Fatalf("unexpected error reading: %v", err)
}
if got, exp := key, "cpu,host=A#!~#value"; got != exp {
t.Fatalf("key mismatch: got %v, exp %v", got, exp)
}
if got, exp := len(values), 1; got != exp {
t.Fatalf("values length mismatch: got %v, exp %v", got, exp)
}
readValues = true
assertValueEqual(t, values[0], p[0])
}
if !readValues {
t.Fatalf("failed to read any values")
}
}
// // Tests that the merge iterator does not pull in deleted WAL entries.
func TestMergeIteragor_DeletedKeys(t *testing.T) {
dir := MustTempDir()
defer os.RemoveAll(dir)
v1 := tsm1.NewValue(time.Unix(1, 0), float64(1))
v2 := tsm1.NewValue(time.Unix(1, 0), float64(1))
v3 := tsm1.NewValue(time.Unix(2, 0), float64(2))
v4 := tsm1.NewValue(time.Unix(2, 0), float64(2))
v5 := tsm1.NewValue(time.Unix(1, 0), float64(3)) // overwrites p1
points1 := map[string][]tsm1.Value{
"cpu,host=A#!~#value": []tsm1.Value{v1, v3},
"cpu,host=B#!~#value": []tsm1.Value{v2},
}
points2 := map[string][]tsm1.Value{
"cpu,host=A#!~#value": []tsm1.Value{v5},
"cpu,host=B#!~#value": []tsm1.Value{v4},
}
entries := []tsm1.WALEntry{
&tsm1.WriteWALEntry{
Values: points1,
},
&tsm1.WriteWALEntry{
Values: points2,
},
&tsm1.DeleteWALEntry{
Keys: []string{"cpu,host=A#!~#value"},
},
}
r := MustWALSegment(dir, entries)
iter, err := tsm1.NewWALKeyIterator(r)
if err != nil {
t.Fatalf("unexpected error creating WALKeyIterator: %v", err)
}
m := tsm1.NewMergeIterator(iter, 2)
var data = []struct {
key string
points []tsm1.Value
}{
{"cpu,host=B#!~#value", []tsm1.Value{v2, v4}},
}
for _, p := range data {
if !m.Next() {
t.Fatalf("expected next, got false")
}
key, values, err := m.Read()
if err != nil {
t.Fatalf("unexpected error reading: %v", err)
}
if got, exp := key, p.key; got != exp {
t.Fatalf("key mismatch: got %v, exp %v", got, exp)
}
if got, exp := len(values), len(p.points); got != exp {
t.Fatalf("values length mismatch: got %v, exp %v", got, exp)
}
for i, point := range p.points {
assertValueEqual(t, values[i], point)
}
}
}