EMMA-代码覆盖率测试工具

最近在做代码覆盖率测试集成，看了一些文章，此处只做整理，方便以后查询使用。

ps：前人种树，后人乘凉，感谢！

查看的一些文章：

http://www.cnblogs.com/morebetter/archive/2013/06/26/3156756.html
http://www.ibm.com/developerworks/cn/opensource/os-cn-emma/
http://lishiguang.iteye.com/blog/1123641
http://colin2wang.iteye.com/blog/627618
http://m.blog.csdn.net/blog/dawnming/7943589
http://www.tuicool.com/articles/3YJRfuU
http://blog.sina.com.cn/s/blog_4692ea0a0101iusi.html
http://jingyan.baidu.com/article/49ad8bce6b392a5834d8fa0e.html
http://www.cnblogs.com/morebetter/archive/2013/06/26/3156756.html

以下为对上边文章的搜集和验证：

//0.插装准备
将emma.jar 放到 “../java/jre/lib/ext” 下面。
//1.插装
// 1.1对类文件插装命令
java emma instr -m overwrite -ip D:/Appium/UATProj/testUpload/WebRoot/WEB-INF/classes/org/yyx/upload -Dmetadata.out.file=D:/emma/testUpload/coverage.em
// 1.2对 JAR 包插装命令
java emma instr -m overwrite -cp D:/emma/emma.jar -Dmetadata.out.file=D:/emma/testUpload/coverage.em
// 1.3对 WAR/EAR 包插装命令
java emma instr -m overwrite -ip D:/emma/MyDWRSample.war -Dmetadata.out.file=D:/emma/MyDWRSample/coverage.em
// 1.4选择插装命令
java emma instr -m overwrite -cp TestWs.jar -ix +org.wstest.service.* -Dmetadata.out.file=/root/emma/Number_coverage.em
// 1.5合并元数据
java emma merge -input c:/coverage1.em,c:/coverage2.em -out c:/coverage.em
//2.运行测试用例
//3.收集覆盖率信息
// 3.1从本地收集
java emma ctl -connect localhost:47653 -command coverage.get,D:/emma/testUpload/coverage.ec
// 3.2从远程机器上收集
java emma ctl -connect 192.168.61.123:47653 -command coverage.dump,D:/emma/testUpload/coverage.ec
//4.生成覆盖率报告
java emma report -r html -in D:/emma/testUpload/coverage.em,D:/emma/testUpload/coverage.ec - Dreport.html.out.file=c:/emma/testUpload/coverage.html -Dreport.metrics=class:80,method:75
//5.清除内存中覆盖率信息命令
java emma ctl -connect localhost:47653-command coverage.reset
//6.合并覆盖率结果命令
java emma merge –input coverage1.ec,coverage2.ec,coverage3.ec –output coverage.ec

ps:
a.本次关注点
1.插装-对类文件插装命令 2.运行测试用例 3.收集覆盖率信息 4.生成覆盖率报告
b.使用emma时遇到几个问题
1、没法直接操作war包，如果对war包进行instr，提示说处理了0个文件，所以只好把war包解压以后再处理
2、在windows下tomcat不能自动得到coverage.ec文件，需要使用命令手动获取。


//插装  运行  收集
1.
cd D:\eclipse-standard-kepler-SR2-win32\apache-tomcat-6.0.35\webapps

java emma instr -m overwrite -ip testUploado\WEB-INF\classes\org\yyx\upload\ -Dmetadata.out.file=coverage.em
java emma ctl -connect localhost:47653 -command coverage.get,coverage.ec

ok!

java emma instr -m overwrite -ip testUploado\WEB-INF\classes -Dmetadata.out.file=coverage.em
java emma ctl -connect localhost:47653 -command coverage.get,coverage.ec

ok!

java emma instr -m overwrite -ip testUploado\WEB-INF\classes -Dmetadata.out.file=D:/emma/testUpload/coverage.em
java emma ctl -connect localhost:47653 -command coverage.get,D:/emma/testUpload/coverage.ec

ok!

2.
java emma instr -m overwrite -ip D:\eclipse-standard-kepler-SR2-win32\apache-tomcat-6.0.35\webapps\testUploado\WEB-INF\classes -Dmetadata.out.file=D:/emma/testUpload/coverage.em
java emma ctl -connect localhost:47653 -command coverage.get,D:/emma/testUpload/coverage.ec

ok!


3.
cd D:\eclipse-standard-kepler-SR2-win32\apache-tomcat-6.0.35\webapps\testUploado\WEB-INF

java emma instr -m overwrite -ip classes -Dmetadata.out.file=D:/emma/testUpload/coverage.em
java emma ctl -connect localhost:47653 -command coverage.get,D:/emma/testUpload/coverage.ec

ok!

4.
cd D:\eclipse-standard-kepler-SR2-win32\apache-tomcat-6.0.35\webapps\testUploado

java emma instr -m overwrite -ip WEB-INF\classes -Dmetadata.out.file=D:/emma/testUpload/coverage.em
java emma ctl -connect localhost:47653 -command coverage.get,D:/emma/testUpload/coverage.ec

ok!

5.
java emma instr -m overwrite -ip testUploado.war -Dmetadata.out.file=c:\coverage.em

fall!

本次测试说明：
对于war包插装，emma搞不定，没有说得那没牛

6.
(Tomcat Project)
java emma instr -m overwrite -ip D:\eclipse-standard-kepler-SR2-win32\apache-tomcat-6.0.35\webapps\testUpload\WEB-INF\classes -Dmetadata.out.file=D:/emma/testUpload/coverage.em
java emma ctl -connect localhost:47653 -command coverage.get,D:/emma/testUpload/coverage.ec

fall!

(Dynamic Web Projec)
java emma instr -m overwrite -ip D:\eclipse-standard-kepler-SR2-win32\apache-tomcat-6.0.35\webapps\testUploadz\WEB-INF\classes -Dmetadata.out.file=D:/emma/testUpload/coverage.em
java emma ctl -connect localhost:47653 -command coverage.get,D:/emma/testUpload/coverage.ec

ok!

本次测试说明：
eclipse新建Web项目时，必须建立为Dynamic Web Project项目,
而不能使用tomcat插件建立Tomcat Project，
否则收集覆盖率信息时报错：
"emma ctl:coverage.get: RPC failure while executing [coverage.get]
Exception in thread "main" com.vladium.emma.EMMARuntimeException: coverage.get:
RPC failure while executing [coverage.get]
at com.vladium.emma.ctl.CtlProcessor._run(CtlProcessor.java:242)"

没有尝试直接通过ant或maven打包是否有问题，有待检验

//生成
java emma report -r html -sp D:\eclipse-standard-kepler-SR2-win32\apache-tomcat-6.0.35\webapps\testUploadz\src -in D:\emma\testUpload\bak6\coverage.em,D:\emma\testUpload\bak6\coverage.ec -Dreport.html.out.encoding=utf-8 -Dreport.html.out.file=D:\emma\testUpload\bak6\coverage.html -Dreport.metrics=class:80,method:75

ps：
1.emma在jdk1.7以上版本运行问题及解决方案 ：
-XX:+UseSplitVerifier
语法：
java -XX:+UseSplitVerifier emma report -r html -sp D:\eclipse-standard-kepler-SR2-win32\apache-tomcat-6.0.35\webapps\testUploadz\src -in D:\emma\testUpload\bak6\coverage.em,D:\emma\testUpload\bak6\coverage.ec -Dreport.html.out.encoding=utf-8 -Dreport.html.out.file=D:\emma\testUpload\bak6\coverage.html -Dreport.metrics=class:80,method:75

2.内存不够解决方案：
-Xmx500m -Xms256m
语法：
java -Xmx500m -Xms256m emma report -r html -sp D:\eclipse-standard-kepler-SR2-win32\apache-tomcat-6.0.35\webapps\testUploadz\src -in D:\emma\testUpload\bak6\coverage.em,D:\emma\testUpload\bak6\coverage.ec -Dreport.html.out.encoding=utf-8 -Dreport.html.out.file=D:\emma\testUpload\bak6\coverage.html -Dreport.metrics=class:80,method:75

3.解决emma的coverage report 代码文件乱码的问题
下载emma-2.0.5312-src.zip   http://pkgs.fedoraproject.org/repo/pkgs/emma/
修改core\java12\com\vladium\emma\report\html\ReportGenerator.java的embedSrcFile方法
修改前
in = new BufferedReader (new FileReader (srcFile), IO_BUF_SIZE);
修改后
in = new BufferedReader (new java.io.InputStreamReader(new java.io.FileInputStream(srcFile), m_settings.getOutEncoding ()), IO_BUF_SIZE);
修改后编译，解压emma.jar并替换其中相应的文件重新打包即可。可直接替换emma-2.1.5320版本jar文件，已测试。
采用此jar后，可在java emma report 命令中传入-Dreport.html.out.encoding=utf-8 ,也可直接修改emma.jar中emma_default.properties文件的report.html.out.encoding: ISO-8859-1，改为你程序所使用的编码格式即可。