test: add PageScene unit tests

[wyu71]

Add 16 Google Test cases for PageScene class in cdrawscene.cpp, covering firstItem, getGroupTree, getGroupTreeInfo, and isCurrentZMovable methods with various scene states.

为cdrawscene.cpp中PageScene类的firstItem、getGroupTree、 getGroupTreeInfo和isCurrentZMovable方法补充16个Google Test 单元测试用例，覆盖空场景、分组、图层操作等多种场景。

Log: 补充PageScene类单元测试
Influence: 提升PageScene类4个方法的测试覆盖率，验证图元
查找、分组树获取及图层移动等功能的正确性。

Summary by Sourcery

Tests:

• Add unit coverage for PageScene item lookup, group-tree generation, group-tree information, and z-order movability across empty, grouped, and multi-item scene states.

[sourcery-ai]

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[sourcery-ai]

Reviewer's Guide

Adds 16 Google Test cases in tests/test_pagescene.cpp that exercise PageScene::firstItem, getGroupTree, getGroupTreeInfo, and isCurrentZMovable across empty, item-containing, grouped, and layered scene states using application-level view and drawing helpers.

File-Level Changes

Change	Details	Files
Add Google Test coverage for PageScene item lookup behavior.	Exercise empty scenes and scenes containing drawable items. Cover penetrability and Bezier-item filtering branches. Verify a non-null item is returned for hit-tested shapes.	tests/test_pagescene.cpp
Add tests for group-tree construction and serialization-oriented group information.	Validate empty, ungrouped, and grouped scene trees. Exercise root and valid-group inputs. Cover EDuplicate and ESaveToDDf modes and release returned tree data.	tests/test_pagescene.cpp
Add tests for current-layer movement eligibility.	Verify no-selection and single-item scenes cannot move layers. Verify a middle-Z item can move both up and down.	tests/test_pagescene.cpp
Build integration-style PageScene fixtures through the application UI and expose internals for direct assertions.	Create views and shapes using existing test helpers and simulated grouping shortcuts. Access protected/private scene members by temporarily redefining access specifiers. Assert scene, group, item, and tree state with Google Test.	tests/test_pagescene.cpp

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[github-actions]

CLA Assistant Lite bot All contributors have signed the CLA ✍️ ✅

[wyu71]

I have read the CLA Document and I hereby sign the CLA.

[deepin-ci-robot]

deepin pr auto review

🤖 AI 代码审查报告

总体评分： 97 分 (通过阈值: 70分)

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📊 总体评价

项目	结果
审查结论	代码审查通过
评分详情	总体评分 97 分，大于 70 分通过阈值，代码质量符合要求。本次提交为 PageScene 类新增 16 个单元测试，覆盖 firstItem、getGroupTree、getGroupTreeInfo 和 isCurrentZMovable 方法，测试逻辑清晰，无安全漏洞，仅存在测试代码重复的轻微质量问题。

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🔍 详细分析

1. 语法逻辑 ✅

评价： 优秀 ✅ 通过

潜在问题：
✅ 未发现明显问题

建议： 语法正确，逻辑清晰。测试用例覆盖了空场景、单项场景、多项场景、分组场景等多种边界条件，ASSERT_NE/EXPECT_EQ/EXPECT_NE/EXPECT_TRUE/EXPECT_FALSE 等断言使用恰当。指针使用前均做了空指针检查（ASSERT_NE），资源管理规范（releaseBzItemsTreeInfo 释放树信息）。

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2. 代码质量 ✅

评价： 良好 ✅ 通过

潜在问题：

1. tests/test_pagescene.cpp:1 - 16个测试用例中重复的初始化代码（createNewViewByShortcutKey、获取view/scene、ASSERT_NE检查），应使用TEST_F测试夹具提取
2. tests/test_pagescene.cpp:170 - 多个测试中创建矩形图元并分组的代码重复（创建2个矩形+Ctrl+G分组），可提取为辅助函数

建议： 建议使用 Google Test 的 TEST_F 夹具机制提取公共初始化代码（createNewViewByShortcutKey、获取view/scene），减少重复；将重复的创建图元和分组操作提取为辅助函数（如 createRectAndGroup）。

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3. 代码性能 ✅

评价： 优秀 ✅ 通过

潜在问题：
✅ 未发现明显问题

建议： 性能良好，资源使用合理。每个测试仅创建必要的对象，无不必要的计算或循环。

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4. 代码安全 🔒

评价： 优秀 ✅ 通过

🔐 发现 0 个安全漏洞

安全漏洞详情：
✅ 未发现安全漏洞

建议： 存在0个安全漏洞，安全合规。测试代码无用户输入处理、无注入风险、无硬编码凭证。#define protected/public 为 C++ 测试常用模式，非安全漏洞。

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💡 改进建议代码示例

// 推荐使用 TEST_F 测试夹具减少重复代码
class PageSceneTest : public ::testing::Test {
protected:
    PageView *view = nullptr;
    PageScene *scene = nullptr;

    void SetUp() override {
        createNewViewByShortcutKey();
        view = getCurView();
        ASSERT_NE(view, nullptr);
        scene = view->drawScene();
        ASSERT_NE(scene, nullptr);
    }

    // 辅助函数：创建矩形图元并分组
    void createRectsAndGroup(int count) {
        for (int i = 0; i < count; ++i) {
            drawApp->setCurrentTool(rectangle);
            createItemByMouse(view, false,
                QPoint(100 + i * 200, 100 + i * 200),
                QPoint(200 + i * 200, 200 + i * 200), false);
        }
        view->slotOnSelectAll();
        DTestEventList e;
        e.addKeyPress(Qt::Key_G, Qt::ControlModifier, 100);
        e.addKeyRelease(Qt::Key_G, Qt::ControlModifier, 100);
        e.simulate(view->viewport());
    }
};

TEST_F(PageSceneTest, EmptyScene_ReturnsNullptr) {
    QGraphicsItem *result = scene->firstItem(QPointF(100, 100),
        QList<QGraphicsItem *>(), false, false, false, false, false, 0);
    EXPECT_EQ(result, nullptr);
}

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本报告由 AI 代码审查工具自动生成

[deepin-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: lzwind, wyu71

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