Coverage minima: add more fine-grained control

Along with existing overall coverage, add parameters for statement and
branch minima at the package and file level.

README.md

@@ -337,6 +337,10 @@ Read [SBT SCoverage Plugin documentation](https://github.com/scoverage/sbt-scove
                 <configuration>
                     <minimumCoverage>95</minimumCoverage>
                     <minimumCoverageBranchTotal>90</minimumCoverageBranchTotal>
+                    <minimumCoverageStmtPerPackage>90</minimumCoverageStmtPerPackage>
+                    <minimumCoverageBranchPerPackage>85</minimumCoverageBranchPerPackage>
+                    <minimumCoverageStmtPerFile>85</minimumCoverageStmtPerFile>
+                    <minimumCoverageBranchPerFile>80</minimumCoverageBranchPerFile>
                     <failOnMinimumCoverage>true</failOnMinimumCoverage>
                 </configuration>
                 <executions>

src/it/test_coverage_minima/module03/pom.xml

@@ -22,6 +22,10 @@
                     <aggregate>true</aggregate>
                     <minimumCoverage>100</minimumCoverage>
                     <minimumCoverageBranchTotal>100</minimumCoverageBranchTotal>
+                    <minimumCoverageStmtPerPackage>100</minimumCoverageStmtPerPackage>
+                    <minimumCoverageBranchPerPackage>100</minimumCoverageBranchPerPackage>
+                    <minimumCoverageStmtPerFile>100</minimumCoverageStmtPerFile>
+                    <minimumCoverageBranchPerFile>100</minimumCoverageBranchPerFile>
                 </configuration>
                 <executions>
                     <execution>

src/it/test_coverage_minima/pom.xml

@@ -49,6 +49,10 @@
                     <aggregate>true</aggregate> <!-- for aggregated report -->
                     <minimumCoverage>95</minimumCoverage>
                     <minimumCoverageBranchTotal>90</minimumCoverageBranchTotal>
+                    <minimumCoverageStmtPerPackage>90</minimumCoverageStmtPerPackage>
+                    <minimumCoverageBranchPerPackage>85</minimumCoverageBranchPerPackage>
+                    <minimumCoverageStmtPerFile>85</minimumCoverageStmtPerFile>
+                    <minimumCoverageBranchPerFile>80</minimumCoverageBranchPerFile>
                     <failOnMinimumCoverage>false</failOnMinimumCoverage>
                 </configuration>
                 <executions>

src/it/test_coverage_minima/validate.groovy

@@ -23,6 +23,10 @@ try {
             """
             |[ERROR] Coverage is below minimum [50.00% < 95.00%]: Statement:Total
             |[INFO] Coverage is 100%: Branch:Total!
+            |[ERROR] Coverage is below minimum [0.00% < 90.00%]: Statement:Package:pkg02
+            |[ERROR] Coverage is below minimum [0.00% < 85.00%]: Branch:Package:pkg02
+            |[ERROR] Coverage is below minimum [0.00% < 85.00%]: Statement:File:HelloService1.scala
+            |[ERROR] Coverage is below minimum [0.00% < 80.00%]: Branch:File:HelloService1.scala
             |""".stripMargin()
     )
     checkModule(logText, "module03",

src/main/java/org/scoverage/plugin/SCoverageCheckMojo.java

@@ -20,6 +20,8 @@
 import java.io.File;
 import java.util.Arrays;
 import java.util.List;
+import java.util.function.Function;
+import java.util.function.Predicate;
 
 import org.apache.maven.plugin.AbstractMojo;
 import org.apache.maven.plugin.MojoFailureException;
@@ -96,6 +98,54 @@ public class SCoverageCheckMojo
     @Parameter( property = "scoverage.minimumCoverageBranchTotal", defaultValue = "0" )
     private Double minimumCoverageBranchTotal;
 
+    /**
+     * Required minimum per-package statement coverage.
+     * <br>
+     * <br>
+     * See <a href="https://github.com/scoverage/sbt-scoverage#minimum-coverage">https://github.com/scoverage/sbt-scoverage#minimum-coverage</a> for additional documentation.
+     * <br>
+     *
+     * @since 2.0.1
+     */
+    @Parameter( property = "scoverage.minimumCoverageStmtPerPackage", defaultValue = "0" )
+    private Double minimumCoverageStmtPerPackage;
+
+    /**
+     * Required minimum per-package branch coverage.
+     * <br>
+     * <br>
+     * See <a href="https://github.com/scoverage/sbt-scoverage#minimum-coverage">https://github.com/scoverage/sbt-scoverage#minimum-coverage</a> for additional documentation.
+     * <br>
+     *
+     * @since 2.0.1
+     */
+    @Parameter( property = "scoverage.minimumCoverageBranchPerPackage", defaultValue = "0" )
+    private Double minimumCoverageBranchPerPackage;
+
+    /**
+     * Required minimum per-file statement coverage.
+     * <br>
+     * <br>
+     * See <a href="https://github.com/scoverage/sbt-scoverage#minimum-coverage">https://github.com/scoverage/sbt-scoverage#minimum-coverage</a> for additional documentation.
+     * <br>
+     *
+     * @since 2.0.1
+     */
+    @Parameter( property = "scoverage.minimumCoverageStmtPerFile", defaultValue = "0" )
+    private Double minimumCoverageStmtPerFile;
+
+    /**
+     * Required minimum per-file branch coverage.
+     * <br>
+     * <br>
+     * See <a href="https://github.com/scoverage/sbt-scoverage#minimum-coverage">https://github.com/scoverage/sbt-scoverage#minimum-coverage</a> for additional documentation.
+     * <br>
+     *
+     * @since 2.0.1
+     */
+    @Parameter( property = "scoverage.minimumCoverageBranchPerFile", defaultValue = "0" )
+    private Double minimumCoverageBranchPerFile;
+
     /**
      * Fail the build if minimum coverage was not reached.
      * <br>
@@ -188,6 +238,10 @@ public void execute() throws MojoFailureException
 
         boolean ok = checkCoverage( getLog(), "Total", coverage,
                                     minimumCoverage, minimumCoverageBranchTotal, true );
+        ok = checkCoverage( getLog(), "Package:", coverage.packages(), x -> x.name(),
+                            minimumCoverageStmtPerPackage, minimumCoverageBranchPerPackage ) && ok;
+        ok = checkCoverage( getLog(), "File:", coverage.files(), x -> x.filename(),
+                            minimumCoverageStmtPerFile, minimumCoverageBranchPerFile ) && ok;
 
         if ( !ok && failOnMinimumCoverage )
         {
@@ -205,6 +259,17 @@ private static boolean is100( Double d )
         return Math.abs( 100 - d ) <= 0.00001d;
     }
 
+    private static <T extends CoverageMetrics >
+        boolean checkCoverage( Log logger, String metricPrefix,
+                               scala.collection.Iterable< T > metrics,
+                               Function< T, String > toName,
+                               double minStmt, double minBranch )
+    {
+        return minStmt <= 0 && minBranch <= 0 || checkAll(metrics, cov ->
+            checkCoverage(logger, metricPrefix + toName.apply(cov), cov, minStmt, minBranch, false)
+        );
+    }
+
     private static boolean checkCoverage( Log logger, String metric, CoverageMetrics metrics,
                                           double minStmt, double minBranch, boolean logSuccessInfo )
     {
@@ -261,4 +326,17 @@ private static void logSuccess( Log logger, String message, boolean logSuccessIn
         }
     }
 
+    private static <T> boolean checkAll( scala.collection.Iterable<T> iterable, Predicate<T> predicate )
+    {
+        boolean ok = true;
+        for ( T elem : CollectionConverters.asJava( iterable ) )
+        {
+            if ( !predicate.test( elem ) )
+            {
+                ok = false;
+            }
+        }
+        return ok;
+    }
+
 }