added mutation testing with pitest as a separate task (too slow because there are almost only IntTests)

build.gradle

@@ -27,6 +27,7 @@ plugins {
     id "io.spring.dependency-management" version "1.0.6.RELEASE"
     id "com.moowork.node" version "1.2.0"
     id 'org.liquibase.gradle' version '2.0.1'
+    id 'info.solidsoft.pitest' version '1.4.0'
     //jhipster-needle-gradle-plugins - JHipster will add additional gradle plugins here
 }
 
@@ -59,6 +60,22 @@ dependencyManagement {
   }
 }
 
+pitest {
+    targetClasses = ['org.hostsharing.hsadminng.*']
+    excludedClasses = ['*IntTest']
+    threads = 4
+
+    // Do not set these limit even lower, they are already pretty bad values!
+    // 83%*73% means that only ~60% of the code properly covered by automated tests.
+    mutationThreshold = 73
+    coverageThreshold = 83
+
+    timeoutFactor = 3.0
+    outputFormats = ['XML', 'HTML']
+    timestampedReports = false
+    verbose = false
+}
+
 defaultTasks 'bootRun'
 
 group = 'org.hostsharing.hsadminng'
@@ -120,6 +137,7 @@ jacoco {
 
 test.finalizedBy jacocoTestReport
 check.dependsOn jacocoTestCoverageVerification
+check.dependsOn 'pitest'
 
 // Only for purely JHipster/MapStruct generated classes.
 // Please do NOT add any self coded classes!