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store_test.go
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store_test.go
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package appdash
import (
"flag"
"fmt"
"log"
"math/rand"
"reflect"
"sort"
"strings"
"testing"
"time"
)
func TestMemoryStore_Collect_notFound(t *testing.T) {
ms := storeT{t, NewMemoryStore()}
if x, err := ms.Trace(123); err != ErrTraceNotFound {
t.Errorf("Trace(123): got trace %+v and err %#v, want ErrTraceNotFound", x, err)
}
}
func TestMemoryStore_Collect_one(t *testing.T) {
ms := storeT{t, NewMemoryStore()}
t.Log("collect trace 1")
ms.MustCollect(SpanID{1, 1, 0})
want1 := &Trace{Span: Span{ID: SpanID{1, 1, 0}}}
if x := ms.MustTrace(1); !reflect.DeepEqual(x, want1) {
t.Errorf("Trace(1): got trace %+v, want %+v", x, want1)
}
}
func TestMemoryStore_Collect_collectSameTwice(t *testing.T) {
ms := storeT{t, NewMemoryStore()}
t.Log("collect trace 1")
ms.MustCollect(SpanID{1, 1, 0})
t.Log("collect trace 1 again")
ms.MustCollect(SpanID{1, 1, 0})
want1 := &Trace{Span: Span{ID: SpanID{1, 1, 0}}}
if x := ms.MustTrace(1); !reflect.DeepEqual(x, want1) {
t.Errorf("Trace(1): got trace %+v, want %+v", x, want1)
}
}
func TestMemoryStore_Collect_collectSameChildTwice(t *testing.T) {
ms := storeT{t, NewMemoryStore()}
t.Log("collect trace 1")
ms.MustCollect(SpanID{1, 1, 0})
t.Log("collect trace 2")
ms.MustCollect(SpanID{1, 2, 1}, Annotation{Key: "k1"})
ms.MustCollect(SpanID{1, 2, 1}, Annotation{Key: "k2"})
want1 := &Trace{
Span: Span{ID: SpanID{1, 1, 0}},
Sub: []*Trace{
{Span: Span{SpanID{1, 2, 1}, Annotations{{Key: "k1"}, {Key: "k2"}}}},
},
}
if x := ms.MustTrace(1); !reflect.DeepEqual(x, want1) {
t.Errorf("Trace(1): got trace %+v, want %+v", x, want1)
}
}
func TestMemoryStore_Collect_collectTwo(t *testing.T) {
ms := storeT{t, NewMemoryStore()}
t.Log("collect trace 1")
ms.MustCollect(SpanID{1, 1, 0})
t.Log("collect trace 2")
ms.MustCollect(SpanID{2, 1, 0})
want2 := &Trace{Span: Span{ID: SpanID{2, 1, 0}}}
if x := ms.MustTrace(2); !reflect.DeepEqual(x, want2) {
t.Errorf("Trace(2): got trace %+v, want %+v", x, want2)
}
want1 := &Trace{Span: Span{ID: SpanID{1, 1, 0}}}
if x := ms.MustTrace(1); !reflect.DeepEqual(x, want1) {
t.Errorf("Trace(1): got trace %+v, want %+v", x, want1)
}
if x := ms.MustTrace(2); !reflect.DeepEqual(x, want2) {
t.Errorf("Trace(2): got trace %+v, want %+v", x, want2)
}
}
func TestMemoryStore_Collect_oneChild(t *testing.T) {
ms := storeT{t, NewMemoryStore()}
t.Log("collect trace 1")
ms.MustCollect(SpanID{1, 1, 0})
t.Log("collect trace 1 child")
ms.MustCollect(SpanID{1, 2, 1})
want1 := &Trace{
Span: Span{ID: SpanID{1, 1, 0}},
Sub: []*Trace{
{
Span: Span{ID: SpanID{1, 2, 1}},
},
},
}
if x := ms.MustTrace(1); !reflect.DeepEqual(x, want1) {
t.Errorf("Trace(1): got trace %+v, want %+v", x, want1)
}
}
func TestMemoryStore_Collect_childCollectedBeforeRoot(t *testing.T) {
ms := storeT{t, NewMemoryStore()}
t.Log("collect trace 1 child")
ms.MustCollect(SpanID{1, 2, 1})
want1 := &Trace{Span: Span{ID: SpanID{1, 2, 1}}}
if x := ms.MustTrace(1); !reflect.DeepEqual(x, want1) {
t.Errorf("Trace(1): got trace %+v, want %+v", x, want1)
}
t.Log("collect trace 1 root")
ms.MustCollect(SpanID{1, 1, 0})
want1 = &Trace{
Span: Span{ID: SpanID{1, 1, 0}},
Sub: []*Trace{
{
Span: Span{ID: SpanID{1, 2, 1}},
},
},
}
if x := ms.MustTrace(1); !reflect.DeepEqual(x, want1) {
t.Errorf("Trace(1): got trace %+v, want %+v", x, want1)
}
}
func TestMemoryStore_Collect_childrenCollectedInReverse(t *testing.T) {
ms := storeT{t, NewMemoryStore()}
t.Log("collect trace 1 child 4")
ms.MustCollect(SpanID{1, 4, 3})
want4 := &Trace{Span: Span{ID: SpanID{1, 4, 3}}}
if x := ms.MustTrace(1); !reflect.DeepEqual(x, want4) {
t.Errorf("Trace(1): got trace %+v, want %+v", x, want4)
}
t.Log("collect trace 1 child 3")
ms.MustCollect(SpanID{1, 3, 2})
want3 := &Trace{
Span: Span{ID: SpanID{1, 3, 2}},
Sub: []*Trace{
{
Span: Span{ID: SpanID{1, 4, 3}},
},
},
}
if x := ms.MustTrace(1); !reflect.DeepEqual(x, want3) {
t.Errorf("Trace(1): got trace %+v, want %+v", x, want3)
}
t.Log("collect trace 1 child 2")
ms.MustCollect(SpanID{1, 2, 1})
want2 := &Trace{
Span: Span{ID: SpanID{1, 2, 1}},
Sub: []*Trace{
{
Span: Span{ID: SpanID{1, 3, 2}},
Sub: []*Trace{
{
Span: Span{ID: SpanID{1, 4, 3}},
},
},
},
},
}
if x := ms.MustTrace(1); !reflect.DeepEqual(x, want2) {
t.Errorf("Trace(1): got trace %+v, want %+v", x, want2)
}
t.Log("collect trace 1 root")
ms.MustCollect(SpanID{1, 1, 0})
want1 := &Trace{
Span: Span{ID: SpanID{1, 1, 0}},
Sub: []*Trace{
{
Span: Span{ID: SpanID{1, 2, 1}},
Sub: []*Trace{
{
Span: Span{ID: SpanID{1, 3, 2}},
Sub: []*Trace{
{
Span: Span{ID: SpanID{1, 4, 3}},
},
},
},
},
},
},
}
if x := ms.MustTrace(1); !reflect.DeepEqual(x, want1) {
t.Errorf("Trace(1): got trace %+v, want %+v", x, want1)
}
}
func TestMemoryStore_Collect_fuzz(t *testing.T) {
if testing.Short() {
t.Skip()
}
ms := storeT{t, NewMemoryStore()}
const n = 2000
spanIDs := make([]SpanID, n)
for i := 0; i < n; i++ {
var parent ID
if i != 0 {
parent = ID(rand.Intn(n) + 1)
}
spanIDs[i] = SpanID{1, ID(i + 1), parent}
}
t.Logf("collecting %d spans, checking for errors and panics", n)
for _, spanID := range spanIDs {
ms.MustCollect(spanID)
}
x := ms.MustTrace(1)
if want := (SpanID{1, 1, 0}); x.Span.ID != want {
t.Errorf("Trace(1): got SpanID %+v, want %+v", x.Span.ID, want)
}
}
var (
traceTreePerm = flag.Int("test.trace-tree-perm", -1, "if > 0, only run this permutation in TestMemoryStore_Collect_traceTreeRearrangement")
)
func TestMemoryStore_Collect_traceTreeRearrangement(t *testing.T) {
if testing.Short() {
t.Skip()
}
const (
spans = 50
perms = 10
)
for n := 1; n <= spans; n++ {
t.Logf("testing rearrangement with n=%d spans, %d permutations", n, perms)
for seed := int64(0); seed < perms; seed++ {
if *traceTreePerm != -1 && int64(*traceTreePerm) != seed {
continue
}
ms := storeT{t, NewMemoryStore()}
// ms.Store.(*MemoryStore).log = true
perm := rand.New(rand.NewSource(seed)).Perm(n)
spanIDs := make([]SpanID, n) // random order
traces := make(map[ID]*Trace, n)
for j := 0; j < n; j++ {
var parent ID
if j == 0 {
parent = 0 // root
} else if j == 1 {
parent = ID(1) // parent is root
} else if j <= n/2 {
parent = ID(j - 1) // parent is predecessor
} else {
parent = ID(n / 2) // fixed parent
}
id := SpanID{1, ID(j + 1), parent}
spanIDs[perm[j]] = id
traces[id.Span] = &Trace{Span: Span{ID: id}}
}
for _, x := range traces {
parentID := x.Span.ID.Parent
if parentID == 0 {
continue // root
}
parent, present := traces[parentID]
if !present {
t.Fatalf("parent %v not found", uint64(parentID))
}
parent.Sub = append(parent.Sub, x)
}
// t.Logf("collecting %d spans in random order", n)
for _, spanID := range spanIDs {
ms.MustCollect(spanID)
}
want := traces[1] // root
x := ms.MustTrace(1)
// Sort order of children for comparison.
want.sortSubRecursive()
x.sortSubRecursive()
if diff := compareTraces(x, want); len(diff) > 0 {
t.Errorf("seed=%d: Trace(1): trees differed:\n%s\n\ngot tree\n%s\n\nwant tree\n%s", seed, strings.Join(diff, "\n"), x, want)
}
}
}
}
func (t *Trace) sortSubRecursive() {
sort.Sort(tracesByIDSpan(t.Sub))
for _, st := range t.Sub {
st.sortSubRecursive()
}
}
func TestRecentStore(t *testing.T) {
const age = time.Millisecond * 10
ms := NewMemoryStore()
rs := &storeT{t, &RecentStore{DeleteStore: ms, MinEvictAge: age}}
rs.MustCollect(SpanID{1, 2, 3})
rs.MustCollect(SpanID{2, 3, 4})
traces, _ := ms.Traces()
if len(traces) != 2 {
t.Errorf("got traces %v, want %d total", traces, 2)
}
time.Sleep(2 * age)
rs.MustCollect(SpanID{3, 4, 5})
time.Sleep(2 * age)
traces, _ = ms.Traces()
if len(traces) != 1 {
t.Errorf("got traces %v, want %d total", traces, 1)
}
if trace, want := traces[0].ID, (SpanID{3, 4, 5}); trace != want {
t.Errorf("got trace %v, want %v", trace, want)
}
}
func compareTraces(a, b *Trace) (diff []string) {
var cmp func(parent ID, a, b *Trace)
cmp = func(parent ID, a, b *Trace) {
same := true
if !reflect.DeepEqual(a.Span, b.Span) {
diff = append(diff, fmt.Sprintf("%x: spans differed: %+v != %+v", uint64(parent), a.Span, b.Span))
same = false
}
if len(a.Sub) != len(b.Sub) {
diff = append(diff, fmt.Sprintf("%x: children len differed: %d != %d", uint64(parent), len(a.Sub), len(b.Sub)))
same = false
}
if same {
for i, asub := range a.Sub {
bsub := b.Sub[i]
cmp(a.Span.ID.Span, asub, bsub)
}
}
}
cmp(0, a, b)
return diff
}
type storeT struct {
t *testing.T
Store
}
func (s storeT) MustCollect(id SpanID, as ...Annotation) {
if err := s.Store.Collect(id, as...); err != nil {
s.t.Fatalf("Collect(%+v, %v): %s", id, as, err)
}
}
func (s storeT) MustTrace(id ID) *Trace {
t, err := s.Store.Trace(id)
if err != nil {
s.t.Fatalf("Trace(%v): %s", id, err)
}
return t
}
func init() {
log.SetFlags(0)
}