add JaCoCo coverage reporting

Author: while1618

.github/workflows/spring-boot.yml

@@ -31,17 +31,17 @@ jobs:
           distribution: "temurin"
           cache: maven
 
-      - name: Build
-        run: ./mvnw -B clean install -DskipTests
-
       - name: Lint
         run: ./mvnw -B spotless:check
 
-      - name: Unit tests
-        run: ./mvnw -B test
+      - name: Test
+        run: ./mvnw -B clean verify
 
-      - name: Integration tests
-        run: ./mvnw -B failsafe:integration-test failsafe:verify
+      - name: Upload JaCoCo report
+        uses: actions/upload-artifact@v4
+        with:
+          name: jacoco-report
+          path: backend/spring-boot/target/site/jacoco/
 
   push-image:
     needs: build

CLAUDE.md

@@ -14,8 +14,8 @@ Bugzkit is a production-ready full-stack web application template with a Spring
 |---|---------------------------------------------------------|
 | Build (skip tests) | `./mvnw -B clean install -DskipTests`                   |
 | Run (dev profile) | `./mvnw spring-boot:run -Dspring-boot.run.profiles=dev` |
-| Unit tests | `./mvnw -B test`                                        |
-| Integration tests | `./mvnw -B failsafe:integration-test failsafe:verify`   |
+| All tests + coverage | `./mvnw -B clean verify` (report: `target/site/jacoco/`) |
+| Unit tests only | `./mvnw -B test`                                        |
 | Format check | `./mvnw -B spotless:check`                              |
 | Format fix | `./mvnw spotless:apply`                                 |
 

backend/spring-boot/pom.xml

@@ -214,22 +214,64 @@
           </annotationProcessorPaths>
         </configuration>
       </plugin>
+      <plugin>
+        <groupId>org.apache.maven.plugins</groupId>
+        <artifactId>maven-failsafe-plugin</artifactId>
+        <executions>
+          <execution>
+            <goals>
+              <goal>integration-test</goal>
+              <goal>verify</goal>
+            </goals>
+          </execution>
+        </executions>
+      </plugin>
       <plugin>
         <groupId>org.jacoco</groupId>
         <artifactId>jacoco-maven-plugin</artifactId>
         <version>${jacoco.version}</version>
         <executions>
           <execution>
+            <id>prepare-agent</id>
             <goals>
               <goal>prepare-agent</goal>
             </goals>
           </execution>
           <execution>
-            <id>generate-code-coverage-report</id>
-            <phase>test</phase>
+            <id>prepare-agent-integration</id>
+            <goals>
+              <goal>prepare-agent-integration</goal>
+            </goals>
+          </execution>
+          <execution>
+            <id>merge-coverage</id>
+            <phase>post-integration-test</phase>
+            <goals>
+              <goal>merge</goal>
+            </goals>
+            <configuration>
+              <fileSets>
+                <fileSet>
+                  <directory>${project.build.directory}</directory>
+                  <includes>
+                    <include>jacoco.exec</include>
+                    <include>jacoco-it.exec</include>
+                  </includes>
+                </fileSet>
+              </fileSets>
+              <destFile>${project.build.directory}/jacoco-merged.exec</destFile>
+            </configuration>
+          </execution>
+          <execution>
+            <id>report</id>
+            <phase>verify</phase>
             <goals>
               <goal>report</goal>
             </goals>
+            <configuration>
+              <dataFile>${project.build.directory}/jacoco-merged.exec</dataFile>
+              <outputDirectory>${project.reporting.outputDirectory}/jacoco</outputDirectory>
+            </configuration>
           </execution>
         </executions>
       </plugin>