在测试驱动开发中，单元测试非常重要，而测试代码的分支覆盖率和行覆盖率同样重要，目前比较流行的单元测试工具为junit，而覆盖率测试工具cobertura非常好用，现在将2者集成到一块，个人感觉在现实的开发中还是比较实际的，下面看一下集成的过程。
1、工程目录如下：
2、编写类
public class OperateType {
public static final String ADD = "add";
public static final String SUB = "subtract";
public static final String MULT = "multiply";
public static final String DIV = "divide";
public String getType(int typeNumber) {
if (typeNumber == 1) {
return ADD;
} else if (typeNumber == 2) {
return SUB;
} else if (typeNumber == 3) {
return MULT;
} else if (typeNumber == 4) {
return DIV;
} else {
return null;
}
}
}
编写测试类
public class OperateTypeTest {
private OperateType operateType ;
@Before
public void setUp() throws Exception {
operateType = new OperateType();
}
@After
public void tearDown() throws Exception {
operateType = null;
}
@Test
public void testGetType() {
//要达到测试的覆盖率，需要进行充分的验证，所以需要验证5个
Assert.assertEquals(OperateType.ADD,operateType.getType(1));
Assert.assertEquals(OperateType.SUB,operateType.getType(2));
Assert.assertEquals(OperateType.MULT,operateType.getType(3));
Assert.assertEquals(OperateType.DIV,operateType.getType(4));
Assert.assertEquals(null,operateType.getType(5));
}
}
3、配置cobertura信息
build.properties
# The source code for the examples can be found in this directory
src.dir=../src/main/java
test.dir=../src/test/java
# The path to cobertura.jar
cobertura.dir=../cobertura
# Classes generated by the javac compiler are deposited in this directory
classes.dir=classes
# Instrumented classes are deposited into this directory
instrumented.dir=instrumented
# All reports go into this directory
reports.dir=reports
# Unit test reports from JUnit are deposited into this directory
reports.xml.dir=${reports.dir}/junit-xml
reports.html.dir=${reports.dir}/junit-html
# Coverage reports are deposited into these directories
coverage.xml.dir=${reports.dir}/cobertura-xml
coverage.html.dir=${reports.dir}/cobertura-html
bulid.xml
<?xml version="1.0" encoding="UTF-8"?> <project name="cobertura.examples.basic" default="coverage" basedir="."> <description> Cobertura - http://cobertura.sourceforge.net/ Copyright (C) 2003 jcoverage ltd. Copyright (C) 2005 Mark Doliner <[email protected]> Cobertura is licensed under the GNU General Public License Cobertura comes with ABSOLUTELY NO WARRANTY </description> <property file="build.properties" /> <property name="project.lib.dir" location="../lib" /> <!-- <property name="cobertura.dir" location="../cobertura" /> --> <!-- cobertura lib path --> <path id="cobertura.classpath"> <fileset dir="${cobertura.dir}"> <include name="lib/*.jar" /> </fileset> </path> <!-- project lib path --> <path id="project.classpath"> <fileset dir="${project.lib.dir}"> <include name="*.jar" /> </fileset> </path> <taskdef classpathref="cobertura.classpath" resource="tasks.properties"/> <!--Clean task--> <target name="clean" description="Remove all files created by the build/test process."> <delete dir="${classes.dir}" /> <delete dir="${instrumented.dir}" /> <delete dir="${reports.dir}" /> <delete file="cobertura.log" /> <delete file="cobertura.ser" /> </target> <!--int task--> <target name="init"> <mkdir dir="${classes.dir}" /> <mkdir dir="${instrumented.dir}" /> <mkdir dir="${reports.xml.dir}" /> <mkdir dir="${reports.html.dir}" /> <mkdir dir="${coverage.xml.dir}" /> <mkdir dir="${coverage.html.dir}" /> </target> <!--compile task--> <target name="compile" depends="init"> <javac encoding="UTF-8" srcdir="${src.dir}" destdir="${classes.dir}" debug="true"> <classpath> <path refid="project.classpath"/> <path refid="cobertura.classpath"/> </classpath> </javac> <javac srcdir="${test.dir}" destdir="${classes.dir}" debug="true"> <classpath> <path refid="project.classpath"/> <path refid="cobertura.classpath"/> </classpath> </javac> </target> <target name="instrument" depends="init,compile"> <!-- Remove the coverage data file and any old instrumentation. --> <delete file="cobertura.ser"/> <delete dir="${instrumented.dir}" /> <!-- Instrument the application classes, writing the instrumented classes into ${build.instrumented.dir}. --> <cobertura-instrument todir="${instrumented.dir}"> <!-- The following line causes instrument to ignore any source line containing a reference to log4j, for the purposes of coverage reporting. --> <ignore regex="org.apache.log4j.*" /> <fileset dir="${classes.dir}"> <!-- Instrument all the application classes, but don't instrument the test classes. ******************************************* --> <include name="com/example/OperateType.class" /> </fileset> </cobertura-instrument> </target> <target name="test" depends="init,compile"> <junit fork="yes" dir="${basedir}" failureProperty="test.failed"> <!-- Note the classpath order: instrumented classes are before the original (uninstrumented) classes. This is important. --> <classpath location="${instrumented.dir}" /> <classpath location="${classes.dir}" /> <!-- The instrumented classes reference classes used by the Cobertura runtime, so Cobertura and its dependencies must be on your classpath. --> <classpath refid="project.classpath" /> <classpath refid="cobertura.classpath" /> <formatter type="xml" /> <test name="${testcase}" todir="${reports.xml.dir}" if="testcase" /> <batchtest todir="${reports.xml.dir}" unless="testcase"> <fileset dir="${test.dir}"> <!-- Instrument all the test classes, but don't instrument the application classes. ******************************************* --> <include name="com/example/OperateTypeTest.java" /> </fileset> </batchtest> </junit> <junitreport todir="${reports.xml.dir}"> <fileset dir="${reports.xml.dir}"> <include name="TEST-*.xml" /> </fileset> <report format="frames" todir="${reports.html.dir}" /> </junitreport> </target> <target name="coverage-check"> <cobertura-check branchrate="34" totallinerate="100" /> </target> <target name="coverage-report"> <!-- Generate an XML file containing the coverage data using the "srcdir" attribute. --> <cobertura-report srcdir="${src.dir}" destdir="${coverage.xml.dir}" format="xml" /> </target> <target name="alternate-coverage-report"> <!-- Generate a series of HTML files containing the coverage data in a user-readable form using nested source filesets. --> <cobertura-report destdir="${coverage.html.dir}"> <fileset dir="${src.dir}"> <include name="**/*.java"/> </fileset> </cobertura-report> </target> <target name="coverage" depends="clean,init,compile,instrument,test,coverage-report,alternate-coverage-report" description="Compile, instrument ourself, run the tests and generate JUnit and coverage reports."/> </project>
运行ant，脚本，产生报告，包括junit的报告和覆盖率的报告
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