From d1655f065f7c5537a3b12f77281748689a253a87 Mon Sep 17 00:00:00 2001
From: AB024LL <miroslav.pojer@absa.africa>
Date: Mon, 21 Nov 2022 10:37:00 +0100
Subject: [PATCH] #532 - Add code coverage support - Jacoco - added new plugin
 dependency - extended readme.md file with how to get code coverage report -
 extended build logic to add JaCoCo non-default settings

---
 README.md           | 19 +++++++++++++++++++
 build.sbt           | 22 ++++++++++++++++++++++
 project/plugins.sbt |  1 +
 3 files changed, 42 insertions(+)

diff --git a/README.md b/README.md
index 8bb5cf790..6608048a8 100644
--- a/README.md
+++ b/README.md
@@ -125,6 +125,15 @@ of that project for the detailed guide how to run the examples locally and on a
 When running `mvn clean package` in `examples/spark-cobol-app` an uber jar will be created. It can be used to run
 jobs via `spark-submit` or `spark-shell`. 
 
+## How to generate Code coverage report
+```sbt
+sbt ++{scala_version} jacoco
+```
+Code coverage will be generated on path:
+```
+{project-root}/cobrix/{module}/target/scala-{scala_version}/jacoco/report/html
+```
+
 ### Reading Cobol binary files from HDFS/local and querying them 
 
 1. Create a Spark ```SQLContext```
@@ -1423,6 +1432,16 @@ For multisegment variable lengths tests:
 ![](performance/images/exp3_multiseg_wide_time.svg) ![](performance/images/exp3_multiseg_wide_efficiency.svg)    
 ![](performance/images/exp3_multiseg_wide_records_throughput.svg) ![](performance/images/exp3_multiseg_wide_mb_throughput.svg)
 
+
+### How to generate Code coverage report
+```sbt
+sbt jacoco
+```
+Code coverage will be generated on path:
+```
+{local-path}\fixed-width\target\scala-2.XY\jacoco\report\html
+```
+
 ## FAQ
 
 This is a new section where we are going to post common questions and workarounds from GitHub issues raised by our users.  
diff --git a/build.sbt b/build.sbt
index 647bb079e..3ba6a64ec 100644
--- a/build.sbt
+++ b/build.sbt
@@ -17,6 +17,7 @@
 import Dependencies._
 import BuildInfoTemplateSettings._
 import ScalacOptions._
+import com.github.sbt.jacoco.report.JacocoReportSettings
 
 lazy val scala211 = "2.11.12"
 lazy val scala212 = "2.12.17"
@@ -38,6 +39,15 @@ ThisBuild / autoScalaLibrary := false
 
 lazy val printSparkVersion = taskKey[Unit]("Print Spark version spark-cobol is building against.")
 
+lazy val commonJacocoReportSettings: JacocoReportSettings = JacocoReportSettings(
+  formats = Seq(JacocoReportFormats.HTML, JacocoReportFormats.XML)
+)
+
+lazy val commonJacocoExcludes: Seq[String] = Seq(
+//  "za.co.absa.cobrix.spark.cobol.reader.FixedLenTextReader*", // class and related objects
+//  "za.co.absa.cobrix.spark.cobol.reader.RowHandler" // class only
+)
+
 lazy val cobrix = (project in file("."))
   .disablePlugins(sbtassembly.AssemblyPlugin)
   .settings(
@@ -56,6 +66,10 @@ lazy val cobolParser = (project in file("cobol-parser"))
     libraryDependencies ++= CobolParserDependencies :+ getScalaDependency(scalaVersion.value),
     releasePublishArtifactsAction := PgpKeys.publishSigned.value,
     assemblySettings
+  )
+  .settings(
+    jacocoReportSettings := commonJacocoReportSettings.withTitle("cobrix:cobol-parser Jacoco Report"),
+    jacocoExcludes := commonJacocoExcludes
   ).enablePlugins(AutomateHeaderPlugin)
 
 lazy val cobolConverters = (project in file("cobol-converters"))
@@ -64,6 +78,10 @@ lazy val cobolConverters = (project in file("cobol-converters"))
       name := "cobol-converters",
       libraryDependencies ++= CobolConvertersDependencies :+ getScalaDependency(scalaVersion.value),
       releasePublishArtifactsAction := PgpKeys.publishSigned.value
+  )
+  .settings(
+    jacocoReportSettings := commonJacocoReportSettings.withTitle("cobrix:cobol-converters Jacoco Report"),
+    jacocoExcludes := commonJacocoExcludes
   ).dependsOn(cobolParser)
   .enablePlugins(AutomateHeaderPlugin)
 
@@ -83,6 +101,10 @@ lazy val sparkCobol = (project in file("spark-cobol"))
     releasePublishArtifactsAction := PgpKeys.publishSigned.value,
     assemblySettings
   )
+  .settings(
+    jacocoReportSettings := commonJacocoReportSettings.withTitle("cobrix:spark-cobol Jacoco Report"),
+    jacocoExcludes := commonJacocoExcludes
+  )
   .dependsOn(cobolParser)
   .enablePlugins(AutomateHeaderPlugin)
 
diff --git a/project/plugins.sbt b/project/plugins.sbt
index 3990830be..dcd570e5d 100644
--- a/project/plugins.sbt
+++ b/project/plugins.sbt
@@ -3,3 +3,4 @@ addSbtPlugin("com.jsuereth"      % "sbt-pgp"       % "2.0.0")
 addSbtPlugin("de.heikoseeberger" % "sbt-header"    % "5.2.0")
 addSbtPlugin("com.github.sbt"    % "sbt-release"   % "1.1.0")
 addSbtPlugin("com.eed3si9n"      % "sbt-assembly"  % "0.15.0")
+addSbtPlugin("com.github.sbt"    % "sbt-jacoco"    % "3.4.0")