Merge pull request 'meter: move metrics handling in broker implementations' (#215) from metrics into master

Reviewed-on: #215

broker/memory.go

@@ -3,6 +3,7 @@ package broker
 import (
 	"context"
 	"sync"
+	"time"
 
 	"go.unistack.org/micro/v4/logger"
 	"go.unistack.org/micro/v4/metadata"
@@ -134,13 +135,22 @@ func (m *memoryBroker) publish(ctx context.Context, msgs []*Message, opts ...Pub
 		eh := m.opts.ErrorHandler
 
 		for t, ms := range msgTopicMap {
+			ts := time.Now()
+
+			m.opts.Meter.Counter(PublishMessageInflight, "endpoint", t).Add(len(ms))
+			m.opts.Meter.Counter(SubscribeMessageInflight, "endpoint", t).Add(len(ms))
+
 			m.RLock()
 			subs, ok := m.subscribers[t]
 			m.RUnlock()
 			if !ok {
+				m.opts.Meter.Counter(PublishMessageTotal, "endpoint", t, "status", "failure").Add(len(ms))
+				m.opts.Meter.Counter(PublishMessageInflight, "endpoint", t).Add(-len(ms))
+				m.opts.Meter.Counter(SubscribeMessageInflight, "endpoint", t).Add(-len(ms))
 				continue
 			}
 
+			m.opts.Meter.Counter(PublishMessageTotal, "endpoint", t, "status", "success").Add(len(ms))
 			for _, sub := range subs {
 				if sub.opts.BatchErrorHandler != nil {
 					beh = sub.opts.BatchErrorHandler
@@ -152,37 +162,65 @@ func (m *memoryBroker) publish(ctx context.Context, msgs []*Message, opts ...Pub
 				switch {
 				// batch processing
 				case sub.batchhandler != nil:
+
 					if err = sub.batchhandler(ms); err != nil {
+						m.opts.Meter.Counter(SubscribeMessageTotal, "endpoint", t, "status", "failure").Inc()
 						ms.SetError(err)
 						if beh != nil {
 							_ = beh(ms)
 						} else if m.opts.Logger.V(logger.ErrorLevel) {
 							m.opts.Logger.Error(m.opts.Context, err.Error())
 						}
-					} else if sub.opts.AutoAck {
-						if err = ms.Ack(); err != nil {
-							m.opts.Logger.Errorf(m.opts.Context, "ack failed: %v", err)
+					} else {
+						if sub.opts.AutoAck {
+							if err = ms.Ack(); err != nil {
+								m.opts.Logger.Errorf(m.opts.Context, "ack failed: %v", err)
+								m.opts.Meter.Counter(SubscribeMessageTotal, "endpoint", t, "status", "failure").Inc()
+							} else {
+								m.opts.Meter.Counter(SubscribeMessageTotal, "endpoint", t, "status", "success").Inc()
+							}
+						} else {
+							m.opts.Meter.Counter(SubscribeMessageTotal, "endpoint", t, "status", "success").Inc()
 						}
 					}
+					m.opts.Meter.Counter(PublishMessageInflight, "endpoint", t).Add(-len(ms))
+					m.opts.Meter.Counter(SubscribeMessageInflight, "endpoint", t).Add(-len(ms))
 					// single processing
 				case sub.handler != nil:
 					for _, p := range ms {
 						if err = sub.handler(p); err != nil {
+							m.opts.Meter.Counter(SubscribeMessageTotal, "endpoint", t, "status", "failure").Inc()
 							p.SetError(err)
 							if eh != nil {
 								_ = eh(p)
 							} else if m.opts.Logger.V(logger.ErrorLevel) {
 								m.opts.Logger.Error(m.opts.Context, err.Error())
 							}
-						} else if sub.opts.AutoAck {
-							if err = p.Ack(); err != nil {
-								m.opts.Logger.Errorf(m.opts.Context, "ack failed: %v", err)
+						} else {
+							if sub.opts.AutoAck {
+								if err = p.Ack(); err != nil {
+									m.opts.Logger.Errorf(m.opts.Context, "ack failed: %v", err)
+									m.opts.Meter.Counter(SubscribeMessageTotal, "endpoint", t, "status", "failure").Inc()
+								} else {
+									m.opts.Meter.Counter(SubscribeMessageTotal, "endpoint", t, "status", "success").Inc()
+								}
+							} else {
+								m.opts.Meter.Counter(SubscribeMessageTotal, "endpoint", t, "status", "success").Inc()
 							}
 						}
+						m.opts.Meter.Counter(PublishMessageInflight, "endpoint", t).Add(-1)
+						m.opts.Meter.Counter(SubscribeMessageInflight, "endpoint", t).Add(-1)
 					}
 				}
+
 			}
+			te := time.Since(ts)
+			m.opts.Meter.Summary(PublishMessageLatencyMicroseconds, "endpoint", t).Update(te.Seconds())
+			m.opts.Meter.Histogram(PublishMessageDurationSeconds, "endpoint", t).Update(te.Seconds())
+			m.opts.Meter.Summary(SubscribeMessageLatencyMicroseconds, "endpoint", t).Update(te.Seconds())
+			m.opts.Meter.Histogram(SubscribeMessageDurationSeconds, "endpoint", t).Update(te.Seconds())
 		}
+
 	}
 
 	return nil

broker/options.go

@@ -12,6 +12,25 @@ import (
 	"go.unistack.org/micro/v4/tracer"
 )
 
+var (
+	// PublishMessageDurationSeconds specifies meter metric name
+	PublishMessageDurationSeconds = "publish_message_duration_seconds"
+	// PublishMessageLatencyMicroseconds specifies meter metric name
+	PublishMessageLatencyMicroseconds = "publish_message_latency_microseconds"
+	// PublishMessageTotal specifies meter metric name
+	PublishMessageTotal = "publish_message_total"
+	// PublishMessageInflight specifies meter metric name
+	PublishMessageInflight = "publish_message_inflight"
+	// SubscribeMessageDurationSeconds specifies meter metric name
+	SubscribeMessageDurationSeconds = "subscribe_message_duration_seconds"
+	// SubscribeMessageLatencyMicroseconds specifies meter metric name
+	SubscribeMessageLatencyMicroseconds = "subscribe_message_latency_microseconds"
+	// SubscribeMessageTotal specifies meter metric name
+	SubscribeMessageTotal = "subscribe_message_total"
+	// SubscribeMessageInflight specifies meter metric name
+	SubscribeMessageInflight = "subscribe_message_inflight"
+)
+
 // Options struct
 type Options struct {
 	// Tracer used for tracing

meter/wrapper/wrapper.go

@@ -27,22 +27,6 @@ var (
 	ServerRequestTotal = "server_request_total"
 	// ServerRequestInflight specifies meter metric name
 	ServerRequestInflight = "server_request_inflight"
-	// PublishMessageDurationSeconds specifies meter metric name
-	PublishMessageDurationSeconds = "publish_message_duration_seconds"
-	// PublishMessageLatencyMicroseconds specifies meter metric name
-	PublishMessageLatencyMicroseconds = "publish_message_latency_microseconds"
-	// PublishMessageTotal specifies meter metric name
-	PublishMessageTotal = "publish_message_total"
-	// PublishMessageInflight specifies meter metric name
-	PublishMessageInflight = "publish_message_inflight"
-	// SubscribeMessageDurationSeconds specifies meter metric name
-	SubscribeMessageDurationSeconds = "subscribe_message_duration_seconds"
-	// SubscribeMessageLatencyMicroseconds specifies meter metric name
-	SubscribeMessageLatencyMicroseconds = "subscribe_message_latency_microseconds"
-	// SubscribeMessageTotal specifies meter metric name
-	SubscribeMessageTotal = "subscribe_message_total"
-	// SubscribeMessageInflight specifies meter metric name
-	SubscribeMessageInflight = "subscribe_message_inflight"
 
 	labelSuccess  = "success"
 	labelFailure  = "failure"
@@ -230,37 +214,7 @@ func (w *wrapper) Stream(ctx context.Context, req client.Request, opts ...client
 }
 
 func (w *wrapper) Publish(ctx context.Context, p client.Message, opts ...client.PublishOption) error {
-	endpoint := p.Topic()
-
-	labels := make([]string, 0, 4)
-	labels = append(labels, labelEndpoint, endpoint)
-
-	w.opts.Meter.Counter(PublishMessageInflight, labels...).Inc()
-	ts := time.Now()
-	err := w.Client.Publish(ctx, p, opts...)
-	te := time.Since(ts)
-	w.opts.Meter.Counter(PublishMessageInflight, labels...).Dec()
-
-	w.opts.Meter.Summary(PublishMessageLatencyMicroseconds, labels...).Update(te.Seconds())
-	w.opts.Meter.Histogram(PublishMessageDurationSeconds, labels...).Update(te.Seconds())
-
-	if err == nil {
-		labels = append(labels, labelStatus, labelSuccess)
-	} else {
-		labels = append(labels, labelStatus, labelFailure)
-	}
-	w.opts.Meter.Counter(PublishMessageTotal, labels...).Inc()
-
-	return err
-}
-
-// NewHandlerWrapper create new server handler wrapper
-// deprecated
-func NewHandlerWrapper(opts ...Option) server.HandlerWrapper {
-	handler := &wrapper{
-		opts: NewOptions(opts...),
-	}
-	return handler.HandlerFunc
+	return w.Client.Publish(ctx, p, opts...)
 }
 
 // NewServerHandlerWrapper create new server handler wrapper
@@ -302,46 +256,3 @@ func (w *wrapper) HandlerFunc(fn server.HandlerFunc) server.HandlerFunc {
 		return err
 	}
 }
-
-// NewSubscriberWrapper create server subscribe wrapper
-// deprecated
-func NewSubscriberWrapper(opts ...Option) server.SubscriberWrapper {
-	handler := &wrapper{
-		opts: NewOptions(opts...),
-	}
-	return handler.SubscriberFunc
-}
-
-func NewServerSubscriberWrapper(opts ...Option) server.SubscriberWrapper {
-	handler := &wrapper{
-		opts: NewOptions(opts...),
-	}
-	return handler.SubscriberFunc
-}
-
-func (w *wrapper) SubscriberFunc(fn server.SubscriberFunc) server.SubscriberFunc {
-	return func(ctx context.Context, msg server.Message) error {
-		endpoint := msg.Topic()
-
-		labels := make([]string, 0, 4)
-		labels = append(labels, labelEndpoint, endpoint)
-
-		w.opts.Meter.Counter(SubscribeMessageInflight, labels...).Inc()
-		ts := time.Now()
-		err := fn(ctx, msg)
-		te := time.Since(ts)
-		w.opts.Meter.Counter(SubscribeMessageInflight, labels...).Dec()
-
-		w.opts.Meter.Summary(SubscribeMessageLatencyMicroseconds, labels...).Update(te.Seconds())
-		w.opts.Meter.Histogram(SubscribeMessageDurationSeconds, labels...).Update(te.Seconds())
-
-		if err == nil {
-			labels = append(labels, labelStatus, labelSuccess)
-		} else {
-			labels = append(labels, labelStatus, labelFailure)
-		}
-		w.opts.Meter.Counter(SubscribeMessageTotal, labels...).Inc()
-
-		return err
-	}
-}

server/server.go

@@ -145,12 +145,11 @@ type Stream interface {
 //
 // Example:
 //
-//      type Greeter struct {}
-//
-//      func (g *Greeter) Hello(context, request, response) error {
-//              return nil
-//      }
+//	type Greeter struct {}
 //
+//	func (g *Greeter) Hello(context, request, response) error {
+//	        return nil
+//	}
 type Handler interface {
 	Name() string
 	Handler() interface{}

service.go

@@ -88,6 +88,7 @@ func (s *service) Name() string {
 // Init initialises options. Additionally it calls cmd.Init
 // which parses command line flags. cmd.Init is only called
 // on first Init.
+//
 //nolint:gocyclo
 func (s *service) Init(opts ...Option) error {
 	var err error

util/addr/addr.go

@@ -58,6 +58,7 @@ func IsLocal(addr string) bool {
 }
 
 // Extract returns a real ip
+//
 //nolint:gocyclo
 func Extract(addr string) (string, error) {
 	// if addr specified then its returned

util/io/redirect.go

@@ -0,0 +1,17 @@
+package io
+
+import (
+	"os"
+	"sync"
+)
+
+var osStderrMu sync.Mutex
+
+var OrigStderr = func() *os.File {
+	fd, err := dupFD(os.Stderr.Fd())
+	if err != nil {
+		panic(err)
+	}
+
+	return os.NewFile(fd, os.Stderr.Name())
+}()

util/io/redirect_test.go

@@ -0,0 +1,40 @@
+package io
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"os"
+	"regexp"
+	"testing"
+	"time"
+)
+
+var ErrorPattern = regexp.MustCompile(`"error"`)
+
+func TestRedirect(t *testing.T) {
+	r, w, err := os.Pipe()
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	ch := make(chan string)
+
+	go func() {
+		buf := bytes.NewBuffer(nil)
+		_, _ = io.Copy(buf, r)
+		ch <- buf.String()
+	}()
+
+	if err = RedirectStderr(w); err != nil {
+		t.Fatal(err)
+	}
+
+	os.Stderr.Write([]byte(`test redirect`))
+	time.Sleep(1 * time.Millisecond)
+	r.Close()
+	str := <-ch
+	if ErrorPattern.MatchString(str) {
+		t.Fatal(fmt.Errorf(str))
+	}
+}

util/io/redirect_unix.go

@@ -0,0 +1,48 @@
+//go:build !windows
+// +build !windows
+
+package io
+
+import (
+	"os"
+
+	"golang.org/x/sys/unix"
+)
+
+// dupFD is used to initialize OrigStderr (see stderr_redirect.go).
+func dupFD(fd uintptr) (uintptr, error) {
+	// Warning: failing to set FD_CLOEXEC causes the duplicated file descriptor
+	// to leak into subprocesses created by exec.Command. If the file descriptor
+	// is a pipe, these subprocesses will hold the pipe open (i.e., prevent
+	// EOF), potentially beyond the lifetime of this process.
+	//
+	// This can break go test's timeouts. go test usually spawns a test process
+	// with its stdin and stderr streams hooked up to pipes; if the test process
+	// times out, it sends a SIGKILL and attempts to read stdin and stderr to
+	// completion. If the test process has itself spawned long-lived
+	// subprocesses that hold references to the stdin or stderr pipes, go test
+	// will hang until the subprocesses exit, rather defeating the purpose of
+	// a timeout.
+	nfd, err := unix.FcntlInt(fd, unix.F_DUPFD_CLOEXEC, 0)
+	if err != nil {
+		return 0, err
+	}
+	return uintptr(nfd), nil
+}
+
+// RedirectStderr is used to redirect internal writes to fd 2 to the
+// specified file. This is needed to ensure that harcoded writes to fd
+// 2 by e.g. the Go runtime are redirected to a log file of our
+// choosing.
+//
+// We also override os.Stderr for those other parts of Go which use
+// that and not fd 2 directly.
+func RedirectStderr(f *os.File) error {
+	osStderrMu.Lock()
+	defer osStderrMu.Unlock()
+	if err := unix.Dup2(int(f.Fd()), unix.Stderr); err != nil {
+		return err
+	}
+	os.Stderr = f
+	return nil
+}

util/io/redirect_windows.go

@@ -0,0 +1,32 @@
+package io
+
+import (
+	"os"
+
+	"golang.org/x/sys/windows"
+)
+
+// dupFD is used to initialize OrigStderr (see stderr_redirect.go).
+func dupFD(fd uintptr) (uintptr, error) {
+	// Adapted from https://github.com/golang/go/blob/go1.8/src/syscall/exec_windows.go#L303.
+	p := windows.CurrentProcess()
+	var h windows.Handle
+	return uintptr(h), windows.DuplicateHandle(p, windows.Handle(fd), p, &h, 0, true, windows.DUPLICATE_SAME_ACCESS)
+}
+
+// RedirectStderr is used to redirect internal writes to the error
+// handle to the specified file. This is needed to ensure that
+// harcoded writes to the error handle by e.g. the Go runtime are
+// redirected to a log file of our choosing.
+//
+// We also override os.Stderr for those other parts of Go which use
+// that and not fd 2 directly.
+func RedirectStderr(f *os.File) error {
+	osStderrMu.Lock()
+	defer osStderrMu.Unlock()
+	if err := windows.SetStdHandle(windows.STD_ERROR_HANDLE, windows.Handle(f.Fd())); err != nil {
+		return err
+	}
+	os.Stderr = f
+	return nil
+}

util/reflect/struct.go

@@ -493,13 +493,14 @@ func btSplitter(str string) []string {
 }
 
 // queryToMap turns something like a[b][c]=4 into
-//   map[string]interface{}{
-//     "a": map[string]interface{}{
-// 		  "b": map[string]interface{}{
-// 			  "c": 4,
-// 		  },
-// 	  },
-//   }
+//
+//	  map[string]interface{}{
+//	    "a": map[string]interface{}{
+//			  "b": map[string]interface{}{
+//				  "c": 4,
+//			  },
+//		  },
+//	  }
 func queryToMap(param string) (map[string]interface{}, error) {
 	rawKey, rawValue, err := splitKeyAndValue(param)
 	if err != nil {

util/test/sqlmock_test.go

@@ -1,25 +0,0 @@
-package test
-
-import (
-	"fmt"
-	"strings"
-	"testing"
-
-	"github.com/DATA-DOG/go-sqlmock"
-)
-
-func Test_NewSQLRowsFromFile(t *testing.T) {
-	db, c, err := sqlmock.New()
-	if err != nil {
-		t.Fatal(err)
-	}
-	defer db.Close()
-
-	rows, err := NewSQLRowsFromFile(c, "testdata/Call.csv")
-	if err != nil {
-		t.Fatal(err)
-	}
-	if !strings.Contains(fmt.Sprintf("%#+v", rows), `cols:[]string{"DepAgrId", "DepAgrNum", "DepAgrDate", "DepAgrCloseDate", "AccCur", "MainFinaccNum", "MainFinaccName", "MainFinaccId", "MainFinaccOpenDt", "DepAgrStatus", "MainFinaccBal", "DepartCode", "CardAccId"}`) {
-		t.Fatal("invalid cols after import csv")
-	}
-}

util/test/test.go

@@ -1,28 +1,63 @@
 package test
 
 import (
+	"bufio"
+	"bytes"
+	"context"
 	"encoding/csv"
 	"errors"
+	"fmt"
+	"io"
 	"os"
 	"path"
+	"path/filepath"
 	"strings"
 
 	"github.com/DATA-DOG/go-sqlmock"
 	"go.unistack.org/micro/v4/client"
 	"go.unistack.org/micro/v4/codec"
+	"golang.org/x/sync/errgroup"
 )
 
+func getExt(name string) string {
+	ext := filepath.Ext(name)
+	if len(ext) > 0 && ext[0] == '.' {
+		ext = ext[1:]
+	}
+	return ext
+}
+
+func getNameWithoutExt(name string) string {
+	return strings.TrimSuffix(name, filepath.Ext(name))
+}
+
 var ErrUnknownContentType = errors.New("unknown content type")
 
 type Extension struct {
 	Ext []string
 }
 
-var ExtToTypes = map[string][]string{
-	"json":  {"application/json", "application/grpc+json"},
-	"yaml":  {"application/yaml", "application/yml", "text/yaml", "text/yml"},
-	"yml":   {"application/yaml", "application/yml", "text/yaml", "text/yml"},
-	"proto": {"application/grpc", "application/grpc+proto", "application/proto"},
+var (
+	ExtToTypes = map[string][]string{
+		"json":  {"application/json", "application/grpc+json"},
+		"yaml":  {"application/yaml", "application/yml", "text/yaml", "text/yml"},
+		"yml":   {"application/yaml", "application/yml", "text/yaml", "text/yml"},
+		"proto": {"application/grpc", "application/grpc+proto", "application/proto"},
+	}
+
+	DefaultExts = []string{"csv", "json", "yaml", "yml", "proto"}
+)
+
+func clientCall(ctx context.Context, c client.Client, req client.Request, rsp interface{}) error {
+	return nil
+}
+
+func NewResponseFromFile(rspfile string) (*codec.Frame, error) {
+	rspbuf, err := os.ReadFile(rspfile)
+	if err != nil {
+		return nil, err
+	}
+	return &codec.Frame{Data: rspbuf}, nil
 }
 
 func NewRequestFromFile(c client.Client, reqfile string) (client.Request, error) {
@@ -32,10 +67,7 @@ func NewRequestFromFile(c client.Client, reqfile string) (client.Request, error)
 	}
 
 	endpoint := path.Base(path.Dir(reqfile))
-	ext := path.Ext(reqfile)
-	if len(ext) > 0 && ext[0] == '.' {
-		ext = ext[1:]
-	}
+	ext := getExt(reqfile)
 
 	var ct string
 	if cts, ok := ExtToTypes[ext]; ok {
@@ -56,26 +88,189 @@ func NewRequestFromFile(c client.Client, reqfile string) (client.Request, error)
 	return req, nil
 }
 
-func NewSQLRowsFromFile(c sqlmock.Sqlmock, file string) (*sqlmock.Rows, error) {
-	fp, err := os.Open(file)
+func SQLFromFile(m sqlmock.Sqlmock, name string) error {
+	fp, err := os.Open(name)
 	if err != nil {
-		return nil, err
+		return err
 	}
 	defer fp.Close()
-
-	r := csv.NewReader(fp)
-	r.Comma = '\t'
-	r.Comment = '#'
-
-	records, err := r.ReadAll()
-	if err != nil {
-		return nil, err
-	}
-
-	rows := c.NewRows(records[0])
-	for idx := 1; idx < len(records); idx++ {
-		rows.FromCSVString(strings.Join(records[idx], ";"))
-	}
-
-	return rows, nil
+	return SQLFromReader(m, fp)
+}
+
+func SQLFromBytes(m sqlmock.Sqlmock, buf []byte) error {
+	return SQLFromReader(m, bytes.NewReader(buf))
+}
+
+func SQLFromString(m sqlmock.Sqlmock, buf string) error {
+	return SQLFromReader(m, strings.NewReader(buf))
+}
+
+func SQLFromReader(m sqlmock.Sqlmock, r io.Reader) error {
+	var rows *sqlmock.Rows
+	var exp *sqlmock.ExpectedQuery
+	br := bufio.NewReader(r)
+
+	for {
+		s, err := br.ReadString('\n')
+		if err != nil && err != io.EOF {
+			return err
+		} else if err == io.EOF && len(s) == 0 {
+			return nil
+		}
+
+		if s[0] != '#' {
+			r := csv.NewReader(strings.NewReader(s))
+			r.Comma = ','
+			var records [][]string
+			records, err = r.ReadAll()
+			if err != nil {
+				return err
+			}
+			if rows == nil {
+				rows = m.NewRows(records[0])
+			} else {
+				for idx := 0; idx < len(records); idx++ {
+					rows.FromCSVString(strings.Join(records[idx], ","))
+				}
+			}
+			continue
+		}
+
+		if rows != nil {
+			exp.WillReturnRows(rows)
+			rows = nil
+		}
+
+		switch {
+		case strings.HasPrefix(strings.ToLower(s[2:]), "begin"):
+			m.ExpectBegin()
+		case strings.HasPrefix(strings.ToLower(s[2:]), "commit"):
+			m.ExpectCommit()
+		case strings.HasPrefix(strings.ToLower(s[2:]), "rollback"):
+			m.ExpectRollback()
+		case strings.HasPrefix(strings.ToLower(s[2:]), "exec "):
+			m.ExpectExec(s[2+len("exec "):])
+		case strings.HasPrefix(strings.ToLower(s[2:]), "query "):
+			exp = m.ExpectQuery(s[2+len("query "):])
+		}
+	}
+}
+
+func RunWithClientExpectResults(ctx context.Context, c client.Client, m sqlmock.Sqlmock, dir string, exts []string) error {
+	tcases, err := GetCases(dir, exts)
+	if err != nil {
+		return err
+	}
+	g, gctx := errgroup.WithContext(ctx)
+	if !strings.Contains(dir, "parallel") {
+		g.SetLimit(1)
+	}
+
+	for _, tcase := range tcases {
+		for _, dbfile := range tcase.dbfiles {
+			if err = SQLFromFile(m, dbfile); err != nil {
+				return err
+			}
+		}
+
+		for idx := 0; idx < len(tcase.reqfiles); idx++ {
+			g.TryGo(func() error {
+				req, err := NewRequestFromFile(c, tcase.reqfiles[idx])
+				if err != nil {
+					return err
+				}
+				rsp, err := NewResponseFromFile(tcase.rspfiles[idx])
+				if err != nil {
+					return err
+				}
+				data := &codec.Frame{}
+				err = c.Call(gctx, req, data, client.WithContentType(req.ContentType()))
+				if err != nil {
+					return err
+				}
+				if !bytes.Equal(rsp.Data, data.Data) {
+					return fmt.Errorf("rsp not equal test %s != %s", rsp.Data, data.Data)
+				}
+				return nil
+			})
+		}
+	}
+	return g.Wait()
+}
+
+func RunWithClientExpectErrors(ctx context.Context, c client.Client, dir string) error {
+	g, gctx := errgroup.WithContext(ctx)
+	if !strings.Contains(dir, "parallel") {
+		g.SetLimit(1)
+	}
+	_ = gctx
+	g.TryGo(func() error {
+		// rsp := &codec.Frame{}
+		// return c.Call(ctx, req, rsp, client.WithContentType(req.ContentType()))
+		return nil
+	})
+	return g.Wait()
+}
+
+type Case struct {
+	dbfiles  []string
+	reqfiles []string
+	rspfiles []string
+}
+
+func GetCases(dir string, exts []string) ([]Case, error) {
+	var tcases []Case
+	entries, err := os.ReadDir(dir)
+	if len(entries) == 0 && err != nil {
+		return tcases, err
+	}
+
+	if exts == nil {
+		exts = DefaultExts
+	}
+
+	var dirs []string
+	var dbfiles, reqfiles, rspfiles []string
+
+	for _, entry := range entries {
+		if entry.IsDir() {
+			dirs = append(dirs, filepath.Join(dir, entry.Name()))
+			continue
+		}
+		if info, err := entry.Info(); err != nil {
+			return tcases, err
+		} else if !info.Mode().IsRegular() {
+			continue
+		}
+
+		for _, ext := range exts {
+			if getExt(entry.Name()) == ext {
+				name := getNameWithoutExt(entry.Name())
+				switch {
+				case strings.HasSuffix(name, "_db"):
+					dbfiles = append(dbfiles, filepath.Join(dir, entry.Name()))
+				case strings.HasSuffix(name, "_req"):
+					reqfiles = append(reqfiles, filepath.Join(dir, entry.Name()))
+				case strings.HasSuffix(name, "_rsp"):
+					rspfiles = append(rspfiles, filepath.Join(dir, entry.Name()))
+				}
+			}
+		}
+	}
+
+	if len(reqfiles) > 0 && len(rspfiles) > 0 {
+		tcases = append(tcases, Case{dbfiles: dbfiles, reqfiles: reqfiles, rspfiles: rspfiles})
+	}
+
+	for _, dir = range dirs {
+		ntcases, err := GetCases(dir, exts)
+		if len(ntcases) == 0 && err != nil {
+			return tcases, err
+		} else if len(ntcases) == 0 {
+			continue
+		}
+		tcases = append(tcases, ntcases...)
+	}
+
+	return tcases, nil
 }

util/test/test_test.go

@@ -0,0 +1,72 @@
+package test
+
+import (
+	"context"
+	"testing"
+
+	"github.com/DATA-DOG/go-sqlmock"
+)
+
+func Test_SQLFromFile(t *testing.T) {
+	ctx := context.TODO()
+	db, c, err := sqlmock.New()
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer db.Close()
+
+	if err = SQLFromFile(c, "testdata/result/01_firstcase/Call_db.csv"); err != nil {
+		t.Fatal(err)
+	}
+
+	tx, err := db.BeginTx(ctx, nil)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	rows, err := tx.QueryContext(ctx, "select * from test;")
+	if err != nil {
+		t.Fatal(err)
+	}
+	for rows.Next() {
+		var id int64
+		var name string
+		err = rows.Scan(&id, &name)
+		if err != nil {
+			t.Fatal(err)
+		}
+		if id != 1 || name != "test" {
+			t.Fatalf("invalid rows %v %v", id, name)
+		}
+	}
+
+	if err = rows.Close(); err != nil {
+		t.Fatal(err)
+	}
+
+	if err = rows.Err(); err != nil {
+		t.Fatal(err)
+	}
+
+	if err = tx.Commit(); err != nil {
+		t.Fatal(err)
+	}
+	if err = c.ExpectationsWereMet(); err != nil {
+		t.Fatal(err)
+	}
+}
+
+func Test_GetCases(t *testing.T) {
+	files, err := GetCases("testdata/", nil)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if len(files) == 0 {
+		t.Fatalf("no files matching")
+	}
+
+	if n := len(files); n != 1 {
+		t.Fatalf("invalid number of test cases %d", n)
+	}
+}

util/test/testdata/result/01_firstcase/Call_db.csv

@@ -0,0 +1,5 @@
+# begin
+# query select \* from test;
+id,name
+1,test
+# commit

util/test/testdata/result/01_firstcase/Call_req.json

@@ -0,0 +1 @@
+{}

util/test/testdata/result/01_firstcase/Call_rsp.json

@@ -0,0 +1 @@
+{}

util/text/text.go

@@ -1,6 +1,5 @@
 package text
 
-
 func DetectEncoding(text string) map[string]int {
 	charsets := map[string]int{
 		"UTF-8":      0,
@@ -77,7 +76,7 @@ func DetectEncoding(text string) map[string]int {
 			charsets["MAC"] += uppercase
 		}
 
-	  last_simb = char
+		last_simb = char
 	}
 
 	return charsets