improve the syncMap.Iterate test to make it 100% reproducible (#970)

* improve the syncMap.Iterate test to make it 100% reproducible

* rename store/mocks/Store.go

* rename mocks/store to mock/store

go.mod

@@ -37,6 +37,7 @@ require (
 	github.com/nlopes/slack v0.6.0
 	github.com/oxtoacart/bpool v0.0.0-20190530202638-03653db5a59c
 	github.com/pkg/errors v0.8.1
+	github.com/stretchr/testify v1.4.0
 	go.uber.org/zap v1.12.0 // indirect
 	golang.org/x/crypto v0.0.0-20191108234033-bd318be0434a
 	golang.org/x/net v0.0.0-20191109021931-daa7c04131f5

go.sum

@@ -360,6 +360,7 @@ github.com/src-d/gcfg v1.4.0 h1:xXbNR5AlLSA315x2UO+fTSSAXCDf+Ar38/6oyGbDKQ4=
 github.com/src-d/gcfg v1.4.0/go.mod h1:p/UMsR43ujA89BJY9duynAwIpvqEujIH/jFlfL7jWoI=
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/objx v0.1.1/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/objx v0.2.0 h1:Hbg2NidpLE8veEBkEZTL3CvlkUIVzuU9jDplZO54c48=
 github.com/stretchr/objx v0.2.0/go.mod h1:qt09Ya8vawLte6SNmTgCsAVtYtaKzEcn8ATUoHMkEqE=
 github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
 github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=

store/mock/store.go

@@ -0,0 +1,103 @@
+// Code generated by mockery v1.0.0. DO NOT EDIT.
+
+package mock
+
+import mock "github.com/stretchr/testify/mock"
+import store "github.com/micro/go-micro/store"
+
+// Store is an autogenerated mock type for the Store type
+type Store struct {
+	mock.Mock
+}
+
+// Delete provides a mock function with given fields: key
+func (_m *Store) Delete(key ...string) error {
+	_va := make([]interface{}, len(key))
+	for _i := range key {
+		_va[_i] = key[_i]
+	}
+	var _ca []interface{}
+	_ca = append(_ca, _va...)
+	ret := _m.Called(_ca...)
+
+	var r0 error
+	if rf, ok := ret.Get(0).(func(...string) error); ok {
+		r0 = rf(key...)
+	} else {
+		r0 = ret.Error(0)
+	}
+
+	return r0
+}
+
+// List provides a mock function with given fields:
+func (_m *Store) List() ([]*store.Record, error) {
+	ret := _m.Called()
+
+	var r0 []*store.Record
+	if rf, ok := ret.Get(0).(func() []*store.Record); ok {
+		r0 = rf()
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).([]*store.Record)
+		}
+	}
+
+	var r1 error
+	if rf, ok := ret.Get(1).(func() error); ok {
+		r1 = rf()
+	} else {
+		r1 = ret.Error(1)
+	}
+
+	return r0, r1
+}
+
+// Read provides a mock function with given fields: key
+func (_m *Store) Read(key ...string) ([]*store.Record, error) {
+	_va := make([]interface{}, len(key))
+	for _i := range key {
+		_va[_i] = key[_i]
+	}
+	var _ca []interface{}
+	_ca = append(_ca, _va...)
+	ret := _m.Called(_ca...)
+
+	var r0 []*store.Record
+	if rf, ok := ret.Get(0).(func(...string) []*store.Record); ok {
+		r0 = rf(key...)
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).([]*store.Record)
+		}
+	}
+
+	var r1 error
+	if rf, ok := ret.Get(1).(func(...string) error); ok {
+		r1 = rf(key...)
+	} else {
+		r1 = ret.Error(1)
+	}
+
+	return r0, r1
+}
+
+// Write provides a mock function with given fields: rec
+func (_m *Store) Write(rec ...*store.Record) error {
+	_va := make([]interface{}, len(rec))
+	for _i := range rec {
+		_va[_i] = rec[_i]
+	}
+	var _ca []interface{}
+	_ca = append(_ca, _va...)
+	ret := _m.Called(_ca...)
+
+	var r0 error
+	if rf, ok := ret.Get(0).(func(...*store.Record) error); ok {
+		r0 = rf(rec...)
+	} else {
+		r0 = ret.Error(0)
+	}
+
+	return r0
+}

sync/map_test.go

@@ -4,14 +4,13 @@ import (
 	"testing"
 	"time"
 
-	store "github.com/micro/go-micro/store"
+	"github.com/micro/go-micro/store"
-	mem_store "github.com/micro/go-micro/store/memory"
+	store_mock "github.com/micro/go-micro/store/mock"
 	mem_lock "github.com/micro/go-micro/sync/lock/memory"
+	"github.com/stretchr/testify/mock"
 )
 
 func TestIterate(t *testing.T) {
-	s1 := mem_store.NewStore()
-	s2 := mem_store.NewStore()
 	recA := &store.Record{
 		Key:   "A",
 		Value: nil,
@@ -20,10 +19,12 @@ func TestIterate(t *testing.T) {
 		Key:   "B",
 		Value: nil,
 	}
-	s1.Write(recA)
+	s1 := &store_mock.Store{}
-	s1.Write(recB)
+	s2 := &store_mock.Store{}
-	s2.Write(recB)
+	s1.On("List").Return([]*store.Record{recA, recB}, nil)
-	s2.Write(recA)
+	s2.On("List").Return([]*store.Record{recB, recA}, nil)
+	s1.On("Write", mock.Anything).Return(nil)
+	s2.On("Write", mock.Anything).Return(nil)
 
 	f := func(key, val interface{}) error {
 		time.Sleep(1 * time.Millisecond)