feat: add task assignment sharing

backend/internal/tasks/service_test.go

@@ -0,0 +1,62 @@
+package tasks
+
+import (
+	"fmt"
+	"testing"
+
+	"github.com/glebarez/sqlite"
+	"github.com/stretchr/testify/require"
+	"gorm.io/gorm"
+	"senlinai-agent/backend/internal/domain"
+)
+
+func TestAssigneeOnlySeesExplicitlySharedObjects(t *testing.T) {
+	database := newTestDB(t)
+	assigneeID := uint(2)
+	task := domain.Task{ProjectID: 1, CreatedBy: 1, AssigneeID: &assigneeID, Title: "处理合同"}
+	note := domain.Note{ProjectID: 1, CreatedBy: 1, Title: "合同背景", Markdown: "只在共享后可见"}
+	require.NoError(t, database.Create(&task).Error)
+	require.NoError(t, database.Create(&note).Error)
+	service := NewService(database)
+
+	before, err := service.VisibleLinkedObjects(task.ID, assigneeID)
+	require.NoError(t, err)
+	require.Empty(t, before)
+
+	require.NoError(t, service.ShareObject(task.ID, "note", note.ID))
+	after, err := service.VisibleLinkedObjects(task.ID, assigneeID)
+	require.NoError(t, err)
+	require.Len(t, after, 1)
+	require.Equal(t, "note", after[0].ObjectType)
+	require.Equal(t, note.ID, after[0].ObjectID)
+}
+
+func TestShareObjectRejectsUnsupportedType(t *testing.T) {
+	database := newTestDB(t)
+	service := NewService(database)
+
+	err := service.ShareObject(1, "ai_session", 9)
+
+	require.ErrorContains(t, err, "unsupported shared object type")
+}
+
+func TestAssignRecordsProjectEvent(t *testing.T) {
+	database := newTestDB(t)
+	task := domain.Task{ProjectID: 7, CreatedBy: 1, Title: "安排评审"}
+	require.NoError(t, database.Create(&task).Error)
+	service := NewService(database)
+
+	require.NoError(t, service.Assign(task.ID, 2))
+
+	var event domain.ProjectEvent
+	require.NoError(t, database.Where("project_id = ? AND entity_type = ? AND entity_id = ?", 7, "task", task.ID).First(&event).Error)
+	require.Equal(t, "task_assigned", event.EventType)
+}
+
+func newTestDB(t *testing.T) *gorm.DB {
+	t.Helper()
+	database, err := gorm.Open(sqlite.Open(fmt.Sprintf("file:%s?mode=memory&cache=shared", t.Name())), &gorm.Config{})
+	require.NoError(t, err)
+	require.NoError(t, domain.AutoMigrate(database))
+	return database
+}