refactor(msg_gateway): restructure and rename message_gateway aligned with custom_example

backend/plugins/domain/msg_gateway/service/dispatch_test.go

@@ -0,0 +1,46 @@
+// Copyright 2026 Arctel.net
+// SPDX-License-Identifier: Apache-2.0
+
+package service_test
+
+import (
+	"Wavelet/plugins/domain/msg_gateway/dao"
+	"Wavelet/plugins/domain/msg_gateway/model/entity"
+	"Wavelet/plugins/domain/msg_gateway/service"
+	"context"
+	"path/filepath"
+	"testing"
+
+	"github.com/glebarez/sqlite"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+	"gorm.io/gorm"
+)
+
+type dispatchTestDB struct{ db *gorm.DB }
+
+func (m *dispatchTestDB) GORM() *gorm.DB                  { return m.db }
+func (m *dispatchTestDB) DB(ctx context.Context) *gorm.DB { return m.db.WithContext(ctx) }
+func (m *dispatchTestDB) Named(_ string) *gorm.DB         { return m.db }
+
+func TestBotDispatchValidatePayload(t *testing.T) {
+	h := &service.BotDispatchHandler{}
+	_, err := h.ValidatePayload([]byte(`{}`))
+	require.Error(t, err)
+	_, err = h.ValidatePayload([]byte(`{"text":"hello"}`))
+	require.NoError(t, err)
+}
+
+func TestBotDispatchNoChannels(t *testing.T) {
+	testDB, err := gorm.Open(sqlite.Open(filepath.Join(t.TempDir(), "dispatch.db")), &gorm.Config{})
+	require.NoError(t, err)
+	require.NoError(t, testDB.AutoMigrate(&entity.MessageChannel{}, &entity.MessageBinding{}))
+	dao.SetDBServiceForTest(&dispatchTestDB{db: testDB})
+	t.Cleanup(func() { dao.SetDBServiceForTest(nil) })
+
+	h := &service.BotDispatchHandler{}
+	res, err := h.Execute(context.Background(), []byte(`{"text":"hello"}`))
+	require.NoError(t, err)
+	require.NotNil(t, res)
+	assert.Contains(t, res.Message, "成功 0")
+}