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

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
+}