코드 커버리지 측정

• JaCoCo를 써보자.
• https://www.eclemma.org/jacoco/trunk/doc/index.html
• http://www.semdesigns.com/Company/Publications/TestCoverage.pdf

pom.xml에 플러그인 추가

<plugin>
    <groupId>org.jacoco</groupId>
    <artifactId>jacoco-maven-plugin</artifactId>
    <version>0.8.4</version>
    <executions>
        <execution>
            <goals>
                <goal>prepare-agent</goal>
            </goals>
        </execution>
        <execution>
            <id>report</id>
            <phase>prepare-package</phase>
            <goals>
                <goal>report</goal>
            </goals>
        </execution>
    </executions>
</plugin>

메이븐 빌드

mvn clean verify

커버리지 만족 못할시 빌드 실패하도록 설정

<execution>
    <id>jacoco-check</id>
    <goals>
        <goal>check</goal>
    </goals>
    <configuration>
        <rules>
            <rule>
                <element>PACKAGE</element>
                <limits>
                    <limit>
                        <counter>LINE</counter>
                        <value>COVEREDRATIO</value>
                        <minimum>0.50</minimum>
                    </limit>
                </limits>
            </rule>
        </rules>
    </configuration>
</execution>

바이트 코드 조작

아무것도 없는 Moja에서 “Rabbit”을 꺼내는 마술

바이트코드 조작 라이브러리