Jacoco显示0％的覆盖率，即使在使用@PrepareForTest通告时成功执行了测试用例

Question

当我使用@PrepareForTest annaotation时，Jacoco显示0％的覆盖率，甚至测试用例都成功执行。

下面是我的示例代码。我想测试WebOmnibarLookupServiceImpl类公共方法loadWebOmnibarLookupCache（）。在其调用私有方法getWebOmnibarDictionaryKey中。

@RunWith(PowerMockRunner.class)
@PrepareForTest({QueryRequestUpdater.class, WebOmnibarLookupServiceImpl.class})
public class WebOmnibarLookupServiceImplTest {
    @InjectMocks
    private WebOmnibarLookupServiceImpl service = new WebOmnibarLookupServiceImpl();
   @Test
    public void testloadWebOmnibarLookupCache() throws Exception {
        WebOmnibarLookupServiceImpl privateService = PowerMock.createPartialMock(WebOmnibarLookupServiceImpl.class, "getWebOmnibarDictionaryKey");
        PowerMock.expectPrivate(privateService, "getWebOmnibarDictionaryKey", TestData.getSearchQueryRequestDTOForCache()).andReturn(TestData.getWebOmnibarDictionaryKey());
        doReturn(TestData.getSearchResponseObj()).when(webOmnibarDictionaryCache).get(any());
        service.loadWebOmnibarLookupCache(TestData.getSearchQueryRequestDTOForCache());
    }
}

Maven配置：

<profiles>
    <profile>
      <id>sonar-coverage</id>
      <activation>
        <activeByDefault>true</activeByDefault>
      </activation>
      <build>
        <pluginManagement>
          <plugins>
            <plugin>
              <groupId>org.jacoco</groupId>
              <artifactId>jacoco-maven-plugin</artifactId>
              <version>0.7.7.201606060606</version>
            </plugin>
          </plugins>
        </pluginManagement>
        <plugins>
          <plugin>
            <groupId>org.jacoco</groupId>
            <artifactId>jacoco-maven-plugin</artifactId>
            <configuration>
              <append>true</append>
              <excludes>
                <exclude>**/*Config.*</exclude>
                <exclude>**/*Constants.*</exclude>
                <exclude>**/*Enum.*</exclude>
              </excludes>
            </configuration>
            <executions>
              <execution>
                <id>agent-for-ut</id>
                <goals>
                  <goal>prepare-agent</goal>
                </goals>
              </execution>


                <execution>
                  <id>default-instrument</id>
                  <goals>
                    <goal>instrument</goal>
                  </goals>
                </execution>
                <execution>
                  <id>default-restore-instrumented-classes</id>
                  <goals>
                    <goal>restore-instrumented-classes</goal>
                  </goals>
                </execution>
                <execution>
                  <id>report</id>
                  <phase>prepare-package</phase>
                  <goals>
                    <goal>report</goal>
                  </goals>
                  <configuration>
                    <dataFile>${project.build.directory}/coverage.exec</dataFile>
                  </configuration>
                </execution>


              <execution>
                <id>agent-for-it</id>
                <goals>
                  <goal>prepare-agent-integration</goal>
                </goals>
              </execution>
              <execution>
                <id>jacoco-site</id>
                <phase>verify</phase>
                <goals>
                  <goal>report</goal>
                </goals>
              </execution>
            </executions>
          </plugin>
        </plugins>
      </build>
    </profile>
  </profiles>

这里我使用@@ PrepareForTest（{WebOmnibarLookupServiceImpl.class}）来模拟私有方法。在这里，测试成功执行，但是该类的覆盖率显示为0％，只有那些类没有添加，@ PrepareForTest显示覆盖率。执行测试用例时，我在警告消息下方执行命令。

    [WARNING] Classes in bundle 'webanalytics-server' do no match with execution data. For report generation the same class files must be used as at runtime.
    [WARNING] Execution data for class com/shn/webanalytics/service/impl/WebOmnibarLookupServiceImpl does not match.  

Answer 1

我看到您正在使用PowerMock。已知存在jacoco和powermock兼容性的问题。您可以找到更多详细信息here。

解决方案之一是您可以在代码上进行脱机的jacoco检测，而不是在运行时进行检测。

[Here是在maven中进行的离线检测示例之一。