eclipse覆盖率插件——EclEmma的安装和使用

水深无声 2024-05-31 04:36 85阅读 0赞

**目录**

一.EclEmma 插件的安装

二.EclEmma 插件的使用

补充：覆盖情况的眼色指示

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在[上一节][Link 1]中我们介绍了如何使用junit进行单元测试，单元测试通常以覆盖率作为完成标准，因此，测试时，我们有必要了解当前测试用例对被测代码的覆盖情况，人工分析覆盖情况费时耗力，并不可取，本节介绍eclipse插件——EclEmma 覆盖率插件，通过它可以实时了解测试用例对被测程序的覆盖情况。

### 一.EclEmma 插件的安装 ###

1.点击菜单 help -> eclipse marketplace;

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2Nhb2hvbmd4aW5n_size_16_color_FFFFFF_t_70][]  
2.在弹出窗口上输入搜索条件 “ecl”后，点击回车键  
3.在结果中找到 EclEmma Java Code Coverage 3.1.3 安装

![a00eeb6fc7f242479969d28baf672ff3.png][]

### 二.EclEmma 插件的使用 ###

打开单元测试用例文件，点击工具条上的 带覆盖率执行按钮，

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2Nhb2hvbmd4aW5n_size_16_color_FFFFFF_t_70 1][]

执行结果如下：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2Nhb2hvbmd4aW5n_size_16_color_FFFFFF_t_70 2][]

可以打开覆盖率窗口查看覆盖率结果

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2Nhb2hvbmd4aW5n_size_16_color_FFFFFF_t_70 3][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2Nhb2hvbmd4aW5n_size_16_color_FFFFFF_t_70 4][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2Nhb2hvbmd4aW5n_size_16_color_FFFFFF_t_70 5][]

### 补充：覆盖情况的眼色指示 ###

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2Nhb2hvbmd4aW5n_size_16_color_FFFFFF_t_70 6][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2Nhb2hvbmd4aW5n_size_16_color_FFFFFF_t_70 7][]

cfgDemo(1,2,3) 覆盖38行条件x>1的假分支，由于短路效应，第二个条件b==0不会被执行  
cfgDemo(4,0,3) 覆盖38行条件x>1的真分支，b==0的真分支  
cfgDemo(4,1,3) 覆盖38行条件x>1的真分支，b==0的假分支

至此，38行的两个条件的真假分支均覆盖，所以38行显示为绿色

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[Link 1]: https://mp.csdn.net/mp_blog/creation/editor/118896064
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