使用JUnit 和Jacoco进行单元测试

Jacoco配置

<dependency>
            <groupId>org.jacoco</groupId>
            <artifactId>jacoco-maven-plugin</artifactId>
            <version>0.8.0</version>
 </dependency>

<!--检查代码覆盖率的插件配置-->
            <plugin>
                <groupId>org.jacoco</groupId>
                <artifactId>jacoco-maven-plugin</artifactId>
                <version>0.8.0</version>
                <executions>
                    <execution>
                        <id>prepare-agent</id>
                        <goals>
                            <goal>prepare-agent</goal>
                        </goals>
                    </execution>
                    <execution>
                        <id>check</id>
                        <goals>
                            <goal>check</goal>
                        </goals>
                    </execution>
                    <execution>
                        <id>report</id>
                        <phase>prepare-package</phase>
                        <goals>
                            <goal>report</goal>
                        </goals>
                    </execution>
                </executions>

                <!-- Configuration 里面写配置信息 -->
                <configuration>
                    <!-- rules里面指定覆盖规则 -->
                    <rules>
                        <rule implementation="org.jacoco.maven.RuleConfiguration">
                            <element>BUNDLE</element>
                            <limits>
                                <!-- 指定方法覆盖到10% -->
                                <limit implementation="org.jacoco.report.check.Limit">
                                    <counter>METHOD</counter>
                                    <value>COVEREDRATIO</value>
                                    <minimum>0.10</minimum>
                                </limit>
                                <!-- 指定指令覆盖到10% -->
                                <limit implementation="org.jacoco.report.check.Limit">
                                    <counter>INSTRUCTION</counter>
                                    <value>COVEREDRATIO</value>
                                    <minimum>0.10</minimum>
                                </limit>
                                <!-- 指定行覆盖到10% -->
                                <limit implementation="org.jacoco.report.check.Limit">
                                    <counter>LINE</counter>
                                    <value>COVEREDRATIO</value>
                                    <minimum>0.10</minimum>
                                </limit>
                                <!-- 指定类覆盖到100%，不能遗失任何类, 为0时指最大可丢失数为0, 即覆盖率为100% -->
                                <limit implementation="org.jacoco.report.check.Limit">
                                    <counter>CLASS</counter>
                                    <value>MISSEDCOUNT</value>
                                    <maximum>100</maximum>
                                </limit>

                            </limits>
                        </rule>
                    </rules>
                </configuration>
            </plugin>

安装Junit插件

---------测试小例子

----运行