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package integrationtests
import (
"bytes"
"encoding/gob"
"ior/internal/file"
"ior/internal/flamegraph"
"ior/internal/types"
"os"
"path/filepath"
"testing"
"github.com/DataDog/zstd"
)
// writeIorZst creates a minimal .ior.zst file from known data.
// It encodes a pathMap (the same nested-map structure used internally by iorData)
// so that LoadTestResult can decode it via the public flamegraph.LoadFromFile API.
func writeIorZst(t *testing.T, dir string, records []flamegraph.IterRecord) string {
t.Helper()
// Build the nested map matching iorData.paths layout:
// path → traceId → comm → pid → tid → flags → Counter
type (
flagsMap = map[file.Flags]flamegraph.Counter
tidMap = map[uint32]flagsMap
pidMap = map[uint32]tidMap
commMap = map[string]pidMap
traceIdMap = map[types.TraceId]commMap
pathMapType = map[string]traceIdMap
)
paths := make(pathMapType)
for _, r := range records {
if paths[r.Path] == nil {
paths[r.Path] = make(traceIdMap)
}
if paths[r.Path][r.TraceID] == nil {
paths[r.Path][r.TraceID] = make(commMap)
}
if paths[r.Path][r.TraceID][r.Comm] == nil {
paths[r.Path][r.TraceID][r.Comm] = make(pidMap)
}
if paths[r.Path][r.TraceID][r.Comm][r.Pid] == nil {
paths[r.Path][r.TraceID][r.Comm][r.Pid] = make(tidMap)
}
if paths[r.Path][r.TraceID][r.Comm][r.Pid][r.Tid] == nil {
paths[r.Path][r.TraceID][r.Comm][r.Pid][r.Tid] = make(flagsMap)
}
paths[r.Path][r.TraceID][r.Comm][r.Pid][r.Tid][r.Flags] = r.Cnt
}
var buf bytes.Buffer
if err := gob.NewEncoder(&buf).Encode(paths); err != nil {
t.Fatalf("gob encode: %v", err)
}
filePath := filepath.Join(dir, "test.ior.zst")
f, err := os.Create(filePath)
if err != nil {
t.Fatalf("create file: %v", err)
}
defer f.Close()
w := zstd.NewWriter(f)
if _, err := w.Write(buf.Bytes()); err != nil {
t.Fatalf("zstd write: %v", err)
}
if err := w.Close(); err != nil {
t.Fatalf("zstd close: %v", err)
}
return filePath
}
func TestLoadTestResultAllFields(t *testing.T) {
input := []flamegraph.IterRecord{
{
Path: "/tmp/testfile.txt",
TraceID: types.SYS_ENTER_OPENAT,
Comm: "mycomm",
Pid: 1234,
Tid: 5678,
Flags: file.Flags(0), // O_RDONLY
Cnt: flamegraph.Counter{Count: 10, Duration: 500, DurationToPrev: 50, Bytes: 0},
},
{
Path: "/var/log/syslog",
TraceID: types.SYS_ENTER_WRITE,
Comm: "writer",
Pid: 4321,
Tid: 8765,
Flags: file.Flags(1), // O_WRONLY
Cnt: flamegraph.Counter{Count: 3, Duration: 100, DurationToPrev: 10, Bytes: 256},
},
}
dir := t.TempDir()
iorFile := writeIorZst(t, dir, input)
result, err := LoadTestResult(iorFile)
if err != nil {
t.Fatalf("LoadTestResult: %v", err)
}
if len(result.Records) != len(input) {
t.Fatalf("got %d records, want %d", len(result.Records), len(input))
}
// Build a lookup by Path since map iteration order is not deterministic.
byPath := make(map[string]flamegraph.IterRecord, len(result.Records))
for _, rec := range result.Records {
byPath[rec.Path] = rec
}
for _, want := range input {
got, ok := byPath[want.Path]
if !ok {
t.Errorf("record with path %q not found", want.Path)
continue
}
if got.TraceID != want.TraceID {
t.Errorf("path %q: TraceID = %v, want %v", want.Path, got.TraceID, want.TraceID)
}
if got.Comm != want.Comm {
t.Errorf("path %q: Comm = %q, want %q", want.Path, got.Comm, want.Comm)
}
if got.Pid != want.Pid {
t.Errorf("path %q: Pid = %d, want %d", want.Path, got.Pid, want.Pid)
}
if got.Tid != want.Tid {
t.Errorf("path %q: Tid = %d, want %d", want.Path, got.Tid, want.Tid)
}
if got.Flags != want.Flags {
t.Errorf("path %q: Flags = %v, want %v", want.Path, got.Flags, want.Flags)
}
if got.Cnt != want.Cnt {
t.Errorf("path %q: Cnt = %+v, want %+v", want.Path, got.Cnt, want.Cnt)
}
}
}
func TestLoadTestResultMultipleRecordsSamePath(t *testing.T) {
input := []flamegraph.IterRecord{
{
Path: "/tmp/shared.txt",
TraceID: types.SYS_ENTER_READ,
Comm: "reader",
Pid: 100,
Tid: 200,
Flags: file.Flags(0),
Cnt: flamegraph.Counter{Count: 5, Duration: 300, Bytes: 128},
},
{
Path: "/tmp/shared.txt",
TraceID: types.SYS_ENTER_WRITE,
Comm: "reader",
Pid: 100,
Tid: 200,
Flags: file.Flags(1),
Cnt: flamegraph.Counter{Count: 2, Duration: 100, Bytes: 64},
},
}
dir := t.TempDir()
iorFile := writeIorZst(t, dir, input)
result, err := LoadTestResult(iorFile)
if err != nil {
t.Fatalf("LoadTestResult: %v", err)
}
if len(result.Records) != 2 {
t.Fatalf("got %d records, want 2", len(result.Records))
}
// Verify both tracepoints present under the same path.
traceIDs := make(map[types.TraceId]bool)
for _, rec := range result.Records {
if rec.Path != "/tmp/shared.txt" {
t.Errorf("unexpected path %q", rec.Path)
}
traceIDs[rec.TraceID] = true
}
if !traceIDs[types.SYS_ENTER_READ] {
t.Error("missing SYS_ENTER_READ record")
}
if !traceIDs[types.SYS_ENTER_WRITE] {
t.Error("missing SYS_ENTER_WRITE record")
}
}
func TestLoadTestResultEmpty(t *testing.T) {
dir := t.TempDir()
iorFile := writeIorZst(t, dir, nil)
result, err := LoadTestResult(iorFile)
if err != nil {
t.Fatalf("LoadTestResult: %v", err)
}
if len(result.Records) != 0 {
t.Errorf("got %d records, want 0", len(result.Records))
}
}
func TestLoadTestResultFileNotFound(t *testing.T) {
_, err := LoadTestResult("/nonexistent/path/test.ior.zst")
if err == nil {
t.Fatal("expected error for nonexistent file, got nil")
}
}
func TestLoadTestResultInvalidData(t *testing.T) {
dir := t.TempDir()
filePath := filepath.Join(dir, "garbage.ior.zst")
// Write valid zstd containing garbage (not gob-encoded).
f, err := os.Create(filePath)
if err != nil {
t.Fatalf("create file: %v", err)
}
w := zstd.NewWriter(f)
w.Write([]byte("this is not gob data"))
w.Close()
f.Close()
_, err = LoadTestResult(filePath)
if err == nil {
t.Fatal("expected error for invalid gob data, got nil")
}
}
|
