Knowledgebase‐Diffblue Cover tools - saayam-for-all/docs GitHub Wiki
Use Diffblue Cover tools to generate JUnit automatically
We need to add the JUnit dependency and the jacoco-maven-plugin in the pom.xml.
<dependency>
<groupId>org.junit.jupiter</groupId>
<artifactId>junit-jupiter</artifactId>
<version>5.8.2</version>
</dependency>
<!-- Jacoco plugin -->
<plugin>
<groupId>org.jacoco</groupId>
<artifactId>jacoco-maven-plugin</artifactId>
<version>0.8.8</version>
<executions>
<execution>
<goals>
<goal>prepare-agent</goal>
</goals>
</execution>
<execution>
<id>report</id>
<phase>test</phase>
<goals>
<goal>report</goal>
</goals>
</execution>
<execution>
<id>post-unit-test</id>
<phase>test</phase>
<goals>
<goal>report</goal>
</goals>
<configuration>
<!-- Sets the path to the file which contains the execution data. -->
<dataFile>target/jacoco.exec</dataFile>
<!-- Sets the output directory for the code coverage report. -->
<outputDirectory>target/jacoco-ut</outputDirectory>
</configuration>
</execution>
</executions>
</plugin>
In IntelliJ, go to the Plugins and install Diffblue Cover.
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After restarting IntelliJ, go to the Java development directory, choose the Java class you want to test, right-click it, and select “Write Tests” from the menu. Diffblue Cover will automatically generate tests for the existing methods in the class.
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Once the tests are generated, you can find the corresponding JUnit test files in the test directory.
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Finally, in the Terminal run mvn clean test
to execute the covertage tests. I have configured the jacoco-maven-plugin
in the pom.xml
to output the coverage report to the target/jacoco-ut
directory. You can view the test report by using the command open target/jacoco-ut/index.html
.
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