完善task & 补充测试

.licenserc.json

@@ -1,5 +1,9 @@
 {
   "**/*.go": "// Copyright 2021 ecodeclub",
   "**/*.{yml}": "# Copyright 2021 ecodeclub",
-  "**/*.sh": "# Copyright 2021 ecodeclub"
+  "**/*.sh": "# Copyright 2021 ecodeclub",
+
+  "ignore": [
+    "mocks"
+  ]
 }

channel/email/email.go

@@ -17,9 +17,12 @@ package email
 import (
 	"context"
 	"crypto/tls"
+	"fmt"
 	"net"
 	"net/smtp"
 
+	"github.com/ecodeclub/notify-go/pkg/log"
+
 	"github.com/ecodeclub/ekit/slice"
 	"github.com/ecodeclub/notify-go/pkg/notifier"
 	"github.com/jordan-wright/email"
@@ -58,7 +61,10 @@ func NewEmailChannel(cfg Config) *ChannelEmailImpl {
 }
 
 func (c *ChannelEmailImpl) Execute(ctx context.Context, deli notifier.Delivery) error {
-	var err error
+	var (
+		err    error
+		logger = log.FromContext(ctx)
+	)
 	msgContent := c.initEmailContent(deli.Content)
 
 	c.email.To = slice.Map[notifier.Receiver, string](deli.Receivers, func(idx int, src notifier.Receiver) string {
@@ -72,6 +78,7 @@ func (c *ChannelEmailImpl) Execute(ctx context.Context, deli notifier.Delivery)
 	c.email.HTML = []byte(msgContent.Html)
 	c.email.Text = []byte(msgContent.Text)
 
+	logger.Info("email execute", "params", fmt.Sprintf("to[%v], from[%s]", c.email.To, c.email.From))
 	ch := make(chan struct{})
 	go func() {
 		defer func() {
@@ -85,9 +92,11 @@ func (c *ChannelEmailImpl) Execute(ctx context.Context, deli notifier.Delivery)
 	select {
 	case <-ctx.Done():
 		err = ctx.Err()
+		logger.Error("email execute err", "err", err.Error())
 	case <-ch:
 		if err != nil {
 			err = errors.Wrap(err, "failed to send mail")
+			logger.Error("email execute err", "err", err.Error())
 		}
 	}
 

channel/push/push.go

@@ -21,6 +21,8 @@ import (
 	"strconv"
 	"time"
 
+	"github.com/ecodeclub/notify-go/pkg/log"
+
 	"github.com/ecodeclub/ekit/slice"
 	"github.com/ecodeclub/notify-go/pkg/notifier"
 	"github.com/ecodeclub/notify-go/pkg/ral"
@@ -81,6 +83,8 @@ func NewPushChannel(c Config, client ral.Client) *ChannelPushImpl {
 }
 
 func (pc *ChannelPushImpl) Execute(ctx context.Context, deli notifier.Delivery) error {
+	var logger = log.FromContext(ctx)
+
 	token, err := pc.getToken(ctx)
 	if err != nil {
 		return err
@@ -110,6 +114,7 @@ func (pc *ChannelPushImpl) Execute(ctx context.Context, deli notifier.Delivery)
 	var resp map[string]any
 	err = pc.client.Ral(ctx, "Send", req, &resp, map[string]any{})
 
+	logger.Auto("res", err, "resp", resp)
 	return err
 }
 
@@ -118,7 +123,11 @@ func (pc *ChannelPushImpl) Name() string {
 }
 
 func (pc *ChannelPushImpl) getToken(ctx context.Context) (token string, err error) {
+	var logger = log.FromContext(ctx)
+
 	ts, sign := pc.getSign()
+	logger.Debug("get sign", "timestamp", ts, "sign", sign)
+
 	req := ral.Request{
 		Header: map[string]string{"content-type": "application/json;charset=utf-8"},
 		Body: map[string]interface{}{
@@ -140,6 +149,8 @@ func (pc *ChannelPushImpl) getToken(ctx context.Context) (token string, err erro
 	if !ok {
 		err = errors.New("[push] 获取token失败")
 	}
+
+	logger.Debug("get token", "token", token)
 	return
 }
 

go.mod

@@ -7,10 +7,14 @@ require (
 	github.com/IBM/sarama v1.41.1
 	github.com/ecodeclub/ekit v0.0.8
 	github.com/go-resty/resty/v2 v2.7.0
+	github.com/gorhill/cronexpr v0.0.0-20180427100037-88b0669f7d75
 	github.com/jordan-wright/email v4.0.1-0.20210109023952-943e75fe5223+incompatible
 	github.com/kevinburke/twilio-go v0.0.0-20221122012537-65f3dd7539e2
 	github.com/pborman/uuid v1.2.0
 	github.com/pkg/errors v0.8.1
+	github.com/stretchr/testify v1.8.4
+	go.uber.org/mock v0.3.0
+	moul.io/http2curl v1.0.0
 	xorm.io/xorm v1.3.2
 )
 
@@ -41,7 +45,9 @@ require (
 	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
 	github.com/modern-go/reflect2 v1.0.2 // indirect
 	github.com/pierrec/lz4/v4 v4.1.18 // indirect
+	github.com/pmezard/go-difflib v1.0.0 // indirect
 	github.com/rcrowley/go-metrics v0.0.0-20201227073835-cf1acfcdf475 // indirect
+	github.com/rogpeppe/go-internal v1.11.0 // indirect
 	github.com/syndtr/goleveldb v1.0.0 // indirect
 	github.com/ttacon/builder v0.0.0-20170518171403-c099f663e1c2 // indirect
 	github.com/ttacon/libphonenumber v1.2.1 // indirect
@@ -50,5 +56,6 @@ require (
 	golang.org/x/sync v0.3.0 // indirect
 	golang.org/x/text v0.12.0 // indirect
 	google.golang.org/protobuf v1.26.0 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
 	xorm.io/builder v0.3.11-0.20220531020008-1bd24a7dc978 // indirect
 )

go.sum

@@ -125,7 +125,10 @@ github.com/google/renameio v0.1.0/go.mod h1:KWCgfxg9yswjAJkECMjeO8J8rahYeXnNhOm4
 github.com/google/uuid v1.0.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
 github.com/google/uuid v1.3.0 h1:t6JiXgmwXMjEs8VusXIJk2BXHsn+wx8BZdTaoZ5fu7I=
 github.com/google/uuid v1.3.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
+github.com/gopherjs/gopherjs v0.0.0-20181017120253-0766667cb4d1 h1:EGx4pi6eqNxGaHF6qqu48+N2wcFQ5qg5FXgOdqsJ5d8=
 github.com/gopherjs/gopherjs v0.0.0-20181017120253-0766667cb4d1/go.mod h1:wJfORRmW1u3UXTncJ5qlYoELFm8eSnnEO6hX4iZ3EWY=
+github.com/gorhill/cronexpr v0.0.0-20180427100037-88b0669f7d75 h1:f0n1xnMSmBLzVfsMMvriDyA75NB/oBgILX2GcHXIQzY=
+github.com/gorhill/cronexpr v0.0.0-20180427100037-88b0669f7d75/go.mod h1:g2644b03hfBX9Ov0ZBDgXXens4rxSxmqFBbhvKv2yVA=
 github.com/gorilla/context v1.1.1/go.mod h1:kBGZzfjB9CEq2AlWe17Uuf7NDRt0dE0s8S51q0aT7Yg=
 github.com/gorilla/mux v1.6.2/go.mod h1:1lud6UwP+6orDFRuTfBEV8e9/aOM/c4fVVCaMa2zaAs=
 github.com/gorilla/mux v1.7.3/go.mod h1:1lud6UwP+6orDFRuTfBEV8e9/aOM/c4fVVCaMa2zaAs=
@@ -234,6 +237,7 @@ github.com/json-iterator/go v1.1.7/go.mod h1:KdQUCv79m/52Kvf8AW2vK1V8akMuk1QjK/u
 github.com/json-iterator/go v1.1.8/go.mod h1:KdQUCv79m/52Kvf8AW2vK1V8akMuk1QjK/uOdHXbAo4=
 github.com/json-iterator/go v1.1.12 h1:PV8peI4a0ysnczrg+LtxykD8LfKY9ML6u2jnxaEnrnM=
 github.com/json-iterator/go v1.1.12/go.mod h1:e30LSqwooZae/UwlEbR2852Gd8hjQvJoHmT4TnhNGBo=
+github.com/jtolds/gls v4.20.0+incompatible h1:xdiiI2gbIgH/gLH7ADydsJ1uDOEzR8yvV7C0MuV77Wo=
 github.com/jtolds/gls v4.20.0+incompatible/go.mod h1:QJZ7F/aHp+rZTRtaJ1ow/lLfFfVYBRgL+9YlvaHOwJU=
 github.com/julienschmidt/httprouter v1.2.0/go.mod h1:SYymIcj16QtmaHHD7aYtjjsJG7VTCxuUUipMqKk8s4w=
 github.com/kballard/go-shellquote v0.0.0-20180428030007-95032a82bc51 h1:Z9n2FFNUXsshfwJMBgNA0RU6/i7WVaAegv3PtuIHPMs=
@@ -252,9 +256,13 @@ github.com/konsorten/go-windows-terminal-sequences v1.0.1/go.mod h1:T0+1ngSBFLxv
 github.com/konsorten/go-windows-terminal-sequences v1.0.2/go.mod h1:T0+1ngSBFLxvqU3pZ+m/2kptfBszLMUkC4ZK/EgS/cQ=
 github.com/kr/logfmt v0.0.0-20140226030751-b84e30acd515/go.mod h1:+0opPa2QZZtGFBFZlji/RkVcI2GknAs/DXo4wKdlNEc=
 github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORNo=
+github.com/kr/pretty v0.3.0 h1:WgNl7dwNpEZ6jJ9k1snq4pZsg7DOEN8hP9Xw0Tsjwk0=
+github.com/kr/pretty v0.3.0/go.mod h1:640gp4NfQd8pI5XOwp5fnNeVWj67G7CFk/SaSQn7NBk=
 github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
 github.com/kr/pty v1.1.8/go.mod h1:O1sed60cT9XZ5uDucP5qwvh+TE3NnUj51EiZO/lmSfw=
 github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
+github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
+github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE=
 github.com/lib/pq v1.0.0/go.mod h1:5WUZQaWbwv1U+lTReE5YruASi9Al49XbQIvNi/34Woo=
 github.com/lib/pq v1.1.0/go.mod h1:5WUZQaWbwv1U+lTReE5YruASi9Al49XbQIvNi/34Woo=
 github.com/lib/pq v1.2.0/go.mod h1:5WUZQaWbwv1U+lTReE5YruASi9Al49XbQIvNi/34Woo=
@@ -360,6 +368,8 @@ github.com/remyoudompheng/bigfft v0.0.0-20200410134404-eec4a21b6bb0 h1:OdAsTTz6O
 github.com/remyoudompheng/bigfft v0.0.0-20200410134404-eec4a21b6bb0/go.mod h1:qqbHyh8v60DhA7CoWK5oRCqLrMHRGoxYCSS9EjAz6Eo=
 github.com/rogpeppe/fastuuid v0.0.0-20150106093220-6724a57986af/go.mod h1:XWv6SoW27p1b0cqNHllgS5HIMJraePCO15w5zCzIWYg=
 github.com/rogpeppe/go-internal v1.3.0/go.mod h1:M8bDsm7K2OlrFYOpmOWEs/qY81heoFRclV5y23lUDJ4=
+github.com/rogpeppe/go-internal v1.11.0 h1:cWPaGQEPrBb5/AsnsZesgZZ9yb1OQ+GOISoDNXVBh4M=
+github.com/rogpeppe/go-internal v1.11.0/go.mod h1:ddIwULY96R17DhadqLgMfk9H9tvdUzkipdSkR5nkCZA=
 github.com/rs/xid v1.2.1/go.mod h1:+uKXf+4Djp6Md1KODXJxgGQPKngRmWyn10oCKFzNHOQ=
 github.com/rs/zerolog v1.13.0/go.mod h1:YbFCdg8HfsridGWAh22vktObvhZbQsZXe4/zB0OKkWU=
 github.com/rs/zerolog v1.15.0/go.mod h1:xYTKnLHcpfU2225ny5qZjxnj9NvkumZYjJHlAThCjNc=
@@ -375,7 +385,9 @@ github.com/shurcooL/sanitized_anchor_name v1.0.0/go.mod h1:1NzhyTcUVG4SuEtjjoZeV
 github.com/sirupsen/logrus v1.2.0/go.mod h1:LxeOpSwHxABJmUn/MG1IvRgCAasNZTLOkJPxbbu5VWo=
 github.com/sirupsen/logrus v1.4.1/go.mod h1:ni0Sbl8bgC9z8RoU9G6nDWqqs/fq4eDPysMBDgk/93Q=
 github.com/sirupsen/logrus v1.4.2/go.mod h1:tLMulIdttU9McNUspp0xgXVQah82FyeX6MwdIuYE2rE=
+github.com/smartystreets/assertions v0.0.0-20180927180507-b2de0cb4f26d h1:zE9ykElWQ6/NYmHa3jpm/yHnI4xSofP+UP6SpjHcSeM=
 github.com/smartystreets/assertions v0.0.0-20180927180507-b2de0cb4f26d/go.mod h1:OnSkiWE9lh6wB0YB77sQom3nweQdgAjqCqsofrRNTgc=
+github.com/smartystreets/goconvey v1.6.4 h1:fv0U8FUIMPNf1L9lnHLvLhgicrIVChEkdzIKYqbNC9s=
 github.com/smartystreets/goconvey v1.6.4/go.mod h1:syvi0/a8iFYH4r/RixwvyeAJjdLS9QV7WQ/tjFTllLA=
 github.com/soheilhy/cmux v0.1.4/go.mod h1:IM3LyeVVIOuxMH7sFAkER9+bJ4dT7Ms6E4xg4kGIyLM=
 github.com/sony/gobreaker v0.4.1/go.mod h1:ZKptC7FHNvhBz7dN2LGjPVBz2sZJmc0/PkyDJOjmxWY=
@@ -422,6 +434,8 @@ go.uber.org/atomic v1.3.2/go.mod h1:gD2HeocX3+yG+ygLZcrzQJaqmWj9AIm7n08wl/qW/PE=
 go.uber.org/atomic v1.4.0/go.mod h1:gD2HeocX3+yG+ygLZcrzQJaqmWj9AIm7n08wl/qW/PE=
 go.uber.org/atomic v1.5.0/go.mod h1:sABNBOSYdrvTF6hTgEIbc7YasKWGhgEQZyfxyTvoXHQ=
 go.uber.org/atomic v1.6.0/go.mod h1:sABNBOSYdrvTF6hTgEIbc7YasKWGhgEQZyfxyTvoXHQ=
+go.uber.org/mock v0.3.0 h1:3mUxI1No2/60yUYax92Pt8eNOEecx2D3lcXZh2NEZJo=
+go.uber.org/mock v0.3.0/go.mod h1:a6FSlNadKUHUa9IP5Vyt1zh4fC7uAwxMutEAscFbkZc=
 go.uber.org/multierr v1.1.0/go.mod h1:wR5kodmAFQ0UK8QlbwjlSNy0Z68gJhDJUG5sjR94q/0=
 go.uber.org/multierr v1.3.0/go.mod h1:VgVr7evmIr6uPjLBxg28wmKNXyqE9akIJ5XnfpiKl+4=
 go.uber.org/multierr v1.5.0/go.mod h1:FeouvMocqHpRaaGuG9EjoKcStLC43Zu/fmqdUMPcKYU=
@@ -458,8 +472,8 @@ golang.org/x/mod v0.0.0-20190513183733-4bf6d317e70e/go.mod h1:mXi4GBBbnImb6dmsKG
 golang.org/x/mod v0.1.1-0.20191105210325-c90efee705ee/go.mod h1:QqPTAvyqsEbceGzBzNggFXnrqF1CaUcvgkdR5Ot7KZg=
 golang.org/x/mod v0.3.0/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA=
 golang.org/x/mod v0.6.0-dev.0.20220419223038-86c51ed26bb4/go.mod h1:jJ57K6gSWd91VN4djpZkiMVwK6gcyfeH4XE8wZrZaV4=
-golang.org/x/mod v0.8.0 h1:LUYupSeNrTNCGzR/hVBk2NHZO4hXcVaW1k4Qx7rjPx8=
-golang.org/x/mod v0.8.0/go.mod h1:iBbtSCu2XBx23ZKBPSOrRkjjQPZFPuis4dIYUhu/chs=
+golang.org/x/mod v0.11.0 h1:bUO06HqtnRcc/7l71XBe4WcqTZ+3AH1J59zWDDwLKgU=
+golang.org/x/mod v0.11.0/go.mod h1:iBbtSCu2XBx23ZKBPSOrRkjjQPZFPuis4dIYUhu/chs=
 golang.org/x/net v0.0.0-20180724234803-3673e40ba225/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20180826012351-8a410e7b638d/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
 golang.org/x/net v0.0.0-20180906233101-161cd47e91fd/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
@@ -596,6 +610,8 @@ google.golang.org/protobuf v1.26.0/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQ
 gopkg.in/alecthomas/kingpin.v2 v2.2.6/go.mod h1:FMv+mEhP44yOT+4EoQTLFTRgOQ1FBLkstjWtayDeSgw=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk=
+gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c/go.mod h1:JHkPIbrfpd72SG/EVd6muEfDQjcINNoR0C8j2r3qZ4Q=
 gopkg.in/cheggaaa/pb.v1 v1.0.25/go.mod h1:V/YB90LKu/1FcN3WVnfiiE5oMCibMjukxqG/qStrOgw=
 gopkg.in/errgo.v2 v2.1.0/go.mod h1:hNsd1EY+bozCKY1Ytp96fpM3vjJbqLJn88ws8XvfDNI=
 gopkg.in/fsnotify.v1 v1.4.7 h1:xOHLXZwVvI9hhs+cLKq5+I5onOuwQLhQwiu63xxlHs4=
@@ -726,6 +742,8 @@ modernc.org/tcl v1.8.13/go.mod h1:V+q/Ef0IJaNUSECieLU4o+8IScapxnMyFV6i/7uQlAY=
 modernc.org/token v1.0.0 h1:a0jaWiNMDhDUtqOj09wvjWWAqd3q7WpBulmL9H2egsk=
 modernc.org/token v1.0.0/go.mod h1:UGzOrNV1mAFSEB63lOFHIpNRUVMvYTc6yu1SMY/XTDM=
 modernc.org/z v1.2.19/go.mod h1:+ZpP0pc4zz97eukOzW3xagV/lS82IpPN9NGG5pNF9vY=
+moul.io/http2curl v1.0.0 h1:6XwpyZOYsgZJrU8exnG87ncVkU1FVCcTRpwzOkTDUi8=
+moul.io/http2curl v1.0.0/go.mod h1:f6cULg+e4Md/oW1cYmwW4IWQOVl2lGbmCNGOHvzX2kE=
 sigs.k8s.io/yaml v1.1.0/go.mod h1:UJmg0vDUVViEyp3mgSv9WPwZCDxu4rQW1olrI1uml+o=
 sourcegraph.com/sourcegraph/appdash v0.0.0-20190731080439-ebfcffb1b5c0/go.mod h1:hI742Nqp5OhwiqlzhgfbWU4mW4yO10fP+LoT9WOswdU=
 xorm.io/builder v0.3.11-0.20220531020008-1bd24a7dc978 h1:bvLlAPW1ZMTWA32LuZMBEGHAUOcATZjzHcotf3SWweM=

pkg/iterator/iterator.go

@@ -0,0 +1,44 @@
+// Copyright 2021 ecodeclub
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package iterator
+
+type ListIter[T []E, E any] struct {
+	val    T
+	length int
+	index  int
+}
+
+var _ Iterable[any] = &ListIter[[]any, any]{}
+
+func (it *ListIter[T, E]) Next() (E, bool) {
+	var e E
+	if it.index >= it.length {
+		return e, true
+	}
+	res := it.val[it.index]
+	it.index++
+	return res, false
+}
+
+func NewListIter[T []E, E any](array T) *ListIter[T, E] {
+	if array == nil {
+		return &ListIter[T, E]{}
+	}
+	return &ListIter[T, E]{
+		val:    array,
+		length: len(array),
+		index:  0,
+	}
+}

pkg/iterator/iterator_test.go

@@ -0,0 +1,61 @@
+// Copyright 2021 ecodeclub
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package iterator
+
+import (
+	"reflect"
+	"testing"
+)
+
+type MyStr string
+
+func equal[T []E, E any](t *testing.T, it *ListIter[T, E], want T) {
+	res := make([]E, 0, 10)
+	for {
+		got, done := it.Next()
+		if done {
+			break
+		}
+		res = append(res, got)
+	}
+	if !reflect.DeepEqual(res, want) {
+		t.Errorf("Next() got = %v, want %v", res, want)
+	}
+}
+
+func TestListIter_Nil(t *testing.T) {
+	var a []int
+	lr := NewListIter(a)
+	want := make([]int, 0, 10)
+	equal[[]int, int](t, lr, want)
+}
+
+func TestListIter_Empty(t *testing.T) {
+	lr := NewListIter([]int{})
+	want := make([]int, 0, 10)
+	equal[[]int, int](t, lr, want)
+}
+
+func TestListIter_Base(t *testing.T) {
+	lr := NewListIter[[]int, int]([]int{1, 2, 3, 4})
+	want := []int{1, 2, 3, 4}
+	equal[[]int, int](t, lr, want)
+}
+
+func TestListIter_TypeAlias(t *testing.T) {
+	lr := NewListIter[[]MyStr, MyStr]([]MyStr{"a", "b", "c", "d"})
+	want := []MyStr{"a", "b", "c", "d"}
+	equal[[]MyStr, MyStr](t, lr, want)
+}

pkg/iterator/type.go

@@ -0,0 +1,19 @@
+// Copyright 2021 ecodeclub
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package iterator
+
+type Iterable[T any] interface {
+	Next() (T, bool)
+}