pom.xml: enable pitest mutation testing plugin

README.md

@@ -38,6 +38,7 @@ desired value.
 * huntbugs.version
 * jacoco-maven-plugin.version
 * highwheel-maven.version
+* pitest.version
 * maven-jxr-plugin.version
 * jacoco-class-line-covered-ratio
 * jacoco-class-instruction-covered-ratio
@@ -197,7 +198,46 @@ classes.
 
 ### Configuration
 
-The plugin will `analyse` the project during the `compile` phase.
+The plugin will `analyse` the project during the `verify` phase.
+
+## Pitest Plugin
+
+The [Pitest Plugin](http://pitest.org/)
+provides mutation testing for classes found in the generated `target`
+directory.
+
+### Configuration
+
+The plugin with perform mutation tests during the `verify` phase.
+
+By default, classed named `Immutable*`, will not be included.
+(e.g. classes generated by `org.immutables:value`)
+
+The following properties can adjust the default configuration.
+
+#### `pitest.skip`
+
+Default is `false`.
+
+Set this to `true` to disable the **Pitest Plugin**.
+
+#### `pitest.coverage`
+
+Default is `0`%. (i.e. disabled)
+
+Line coverage at which to fail build.
+
+#### `pitest.mutation`
+
+Default is `0`%. (i.e. disabled)
+
+Mutation score threshold at which to fail build.
+
+#### `pitest.failWhenNoMutations`
+
+Default is `true`.
+
+Set this to `false` to not fail build when there are no mutations.
 
 ## Digraph Dependency Plugin
 

pom.xml

@@ -60,12 +60,17 @@
         <huntbugs.version>0.0.11</huntbugs.version>
         <jacoco-maven-plugin.version>0.7.9</jacoco-maven-plugin.version>
         <highwheel-maven.version>1.2</highwheel-maven.version>
+        <pitest.version>1.2.0</pitest.version>
         <maven-jxr-plugin.version>2.5</maven-jxr-plugin.version>
 
         <jacoco-class-line-covered-ratio>0.50</jacoco-class-line-covered-ratio>
         <jacoco-class-instruction-covered-ratio>0.80</jacoco-class-instruction-covered-ratio>
         <jacoco-class-missed-count-maximum>0</jacoco-class-missed-count-maximum>
         <java.version>1.8</java.version>
+        <pitest.coverage>0</pitest.coverage>
+        <pitest.mutation>0</pitest.mutation>
+        <pitest.skip>false</pitest.skip>
+        <pitest.failWhenNoMutations>true</pitest.failWhenNoMutations>
     </properties>
 
     <developers>
@@ -361,6 +366,28 @@
                     </execution>
                 </executions>
             </plugin><!-- highwheel-maven -->
+
+            <plugin>
+                <groupId>org.pitest</groupId>
+                <artifactId>pitest-maven</artifactId>
+                <version>${pitest.version}</version>
+                <executions>
+                    <execution>
+                        <phase>verify</phase>
+                        <goals>
+                            <goal>mutationCoverage</goal>
+                        </goals>
+                    </execution>
+                </executions>
+                <configuration>
+                    <skip>${pitest.skip}</skip>
+                    <timestampedReports>false</timestampedReports>
+                    <excludedClasses>*.Immutable*</excludedClasses>
+                    <coverageThreshold>${pitest.coverage}</coverageThreshold>
+                    <mutationThreshold>${pitest.mutation}</mutationThreshold>
+                    <failWhenNoMutations>${pitest.failWhenNoMutations}</failWhenNoMutations>
+                </configuration>
+            </plugin><!-- pitest-maven -->
         </plugins>
     </build>
 
@@ -390,6 +417,18 @@
                     <linkXRef>true</linkXRef>
                 </configuration>
             </plugin><!-- maven-pmd-plugin -->
+            <plugin>
+                <groupId>org.pitest</groupId>
+                <artifactId>pitest-maven</artifactId>
+                <version>${pitest.version}</version>
+                <reportSets>
+                    <reportSet>
+                        <reports>
+                            <report>report</report>
+                        </reports>
+                    </reportSet>
+                </reportSets>
+            </plugin><!-- pitest-maven -->
         </plugins>
     </reporting>