diff --git a/tests/unit/domain/test_generation_task.py b/tests/unit/domain/test_generation_task.py
new file mode 100644
index 000000000..edca75f5c
--- /dev/null
+++ b/tests/unit/domain/test_generation_task.py
@@ -0,0 +1,208 @@
+"""generation_task 单测.
+
+domain 层生成任务实体纯逻辑模块，0 外部依赖。
+覆盖：枚举、create工厂/校验、列表拷贝。
+"""
+
+from __future__ import annotations
+
+from packages.domain.generation_task import GenerationTask, GenerationTaskStatus
+
+
+class TestGenerationTaskStatus:
+    """GenerationTaskStatus 枚举测试."""
+
+    def test_five_statuses(self):
+        """五种状态."""
+        assert len(GenerationTaskStatus) == 5
+
+    def test_pending(self):
+        assert GenerationTaskStatus.PENDING == "pending"
+
+    def test_running(self):
+        assert GenerationTaskStatus.RUNNING == "running"
+
+    def test_completed(self):
+        assert GenerationTaskStatus.COMPLETED == "completed"
+
+    def test_failed(self):
+        assert GenerationTaskStatus.FAILED == "failed"
+
+    def test_cancelled(self):
+        assert GenerationTaskStatus.CANCELLED == "cancelled"
+
+
+class TestGenerationTaskCreate:
+    """GenerationTask.create 工厂测试."""
+
+    def test_create_minimal(self):
+        """最简创建（project_id + asset_library_id）."""
+        task = GenerationTask.create(project_id="proj1", asset_library_id="lib1")
+        assert task.project_id == "proj1"
+        assert task.asset_library_id == "lib1"
+        assert task.status == GenerationTaskStatus.PENDING
+        assert task.progress == 0.0
+        assert task.result_count == 0
+        assert task.error_message == ""
+        assert task.asset_ids == []
+        assert task.title_ids == []
+        assert task.voice_ids == []
+        assert isinstance(task.id, str)
+        assert len(task.id) > 0
+
+    def test_create_with_all_fields(self):
+        """带全部字段创建."""
+        task = GenerationTask.create(
+            project_id="  proj1  ",
+            asset_library_id="  lib1  ",
+            strategy_id="  strat1  ",
+            voice_library_id="  vlib1  ",
+            template_id="  tpl1  ",
+            asset_ids=["a1", "a2", "a3"],
+            title_ids=["t1", "t2"],
+            voice_ids=["v1"],
+            created_by_user_id="  user1  ",
+            source_edit_plan_id="  plan1  ",
+            asset_select_mode="random",
+            batch_id="batch1",
+        )
+        assert task.project_id == "proj1"
+        assert task.asset_library_id == "lib1"
+        assert task.strategy_id == "strat1"
+        assert task.voice_library_id == "vlib1"
+        assert task.template_id == "tpl1"
+        assert task.asset_ids == ["a1", "a2", "a3"]
+        assert task.title_ids == ["t1", "t2"]
+        assert task.voice_ids == ["v1"]
+        assert task.created_by_user_id == "user1"
+        assert task.source_edit_plan_id == "plan1"
+        assert task.asset_select_mode == "random"
+        assert task.batch_id == "batch1"
+
+    def test_create_with_template_instead_of_project(self):
+        """有 template_id 但 project_id 为空也可以."""
+        task = GenerationTask.create(
+            project_id="",
+            asset_library_id="lib1",
+            template_id="tpl1",
+        )
+        assert task.template_id == "tpl1"
+        assert task.project_id == ""
+
+    def test_create_neither_project_nor_template(self):
+        """project_id 和 template_id 都为空，抛错."""
+        try:
+            GenerationTask.create(project_id="", asset_library_id="lib1")
+            assert False
+        except ValueError as e:
+            assert "project_id" in str(e) and "template_id" in str(e)
+
+    def test_create_whitespace_project_and_template(self):
+        """都是空白也抛错."""
+        try:
+            GenerationTask.create(project_id="   ", asset_library_id="lib1", template_id="   ")
+            assert False
+        except ValueError as e:
+            assert "project_id" in str(e) and "template_id" in str(e)
+
+    def test_create_no_asset_library_and_no_ids(self):
+        """asset_library_id 为空且没有素材列表，抛错."""
+        try:
+            GenerationTask.create(project_id="p1", asset_library_id="")
+            assert False
+        except ValueError as e:
+            assert "asset_library_id" in str(e)
+
+    def test_create_whitespace_asset_library_and_no_ids(self):
+        """空白 asset_library 且无素材列表，抛错."""
+        try:
+            GenerationTask.create(project_id="p1", asset_library_id="   ")
+            assert False
+        except ValueError as e:
+            assert "asset_library_id" in str(e)
+
+    def test_create_with_asset_ids_instead_of_library(self):
+        """用 asset_ids 替代 asset_library_id."""
+        task = GenerationTask.create(
+            project_id="p1",
+            asset_library_id="",
+            asset_ids=["a1", "a2"],
+        )
+        assert task.asset_library_id == ""
+        assert task.asset_ids == ["a1", "a2"]
+
+    def test_create_with_title_ids_instead_of_library(self):
+        """用 title_ids 替代 asset_library_id."""
+        task = GenerationTask.create(
+            project_id="p1",
+            asset_library_id="",
+            title_ids=["t1"],
+        )
+        assert task.title_ids == ["t1"]
+
+    def test_create_with_voice_ids_instead_of_library(self):
+        """用 voice_ids 替代 asset_library_id."""
+        task = GenerationTask.create(
+            project_id="p1",
+            asset_library_id="",
+            voice_ids=["v1"],
+        )
+        assert task.voice_ids == ["v1"]
+
+    def test_create_asset_ids_copied(self):
+        """asset_ids 是拷贝不是引用."""
+        original = ["a1", "a2"]
+        task = GenerationTask.create(project_id="p1", asset_library_id="lib1", asset_ids=original)
+        original.append("a3")
+        assert task.asset_ids == ["a1", "a2"]
+
+    def test_create_title_ids_copied(self):
+        """title_ids 是拷贝不是引用."""
+        original = ["t1"]
+        task = GenerationTask.create(project_id="p1", asset_library_id="lib1", title_ids=original)
+        original.append("t2")
+        assert task.title_ids == ["t1"]
+
+    def test_create_voice_ids_copied(self):
+        """voice_ids 是拷贝不是引用."""
+        original = ["v1"]
+        task = GenerationTask.create(project_id="p1", asset_library_id="lib1", voice_ids=original)
+        original.append("v2")
+        assert task.voice_ids == ["v1"]
+
+    def test_create_none_lists_default_empty(self):
+        """None 列表默认为空."""
+        task = GenerationTask.create(
+            project_id="p1",
+            asset_library_id="lib1",
+            asset_ids=None,
+            title_ids=None,
+            voice_ids=None,
+        )
+        assert task.asset_ids == []
+        assert task.title_ids == []
+        assert task.voice_ids == []
+
+    def test_create_unique_id(self):
+        """不同任务 id 不同."""
+        t1 = GenerationTask.create("p", "l")
+        t2 = GenerationTask.create("p", "l")
+        assert t1.id != t2.id
+
+    def test_create_has_created_at(self):
+        """有创建时间."""
+        task = GenerationTask.create("p", "l")
+        assert task.created_at is not None
+
+    def test_create_defaults_started_completed_none(self):
+        """started_at 和 completed_at 默认 None."""
+        task = GenerationTask.create("p", "l")
+        assert task.started_at is None
+        assert task.completed_at is None
+
+    def test_empty_lists_independent(self):
+        """不同任务的空列表互不影响."""
+        t1 = GenerationTask.create("p", "l")
+        t2 = GenerationTask.create("p", "l")
+        t1.asset_ids.append("x")
+        assert t2.asset_ids == []