Add a basic testing framework (#18)

Author: Karolina-Bogacka

src/main/scala/eu/neverblink/jelly/cli/App.scala

@@ -2,6 +2,7 @@ package eu.neverblink.jelly.cli
 
 import caseapp.*
 import eu.neverblink.jelly.cli.command.*
+import eu.neverblink.jelly.cli.command.rdf.*
 
 /** Main entrypoint.
   */
@@ -11,4 +12,5 @@ object App extends CommandsEntryPoint:
   override def commands: Seq[Command[?]] = Seq(
     FoolAround,
     Version,
+    RdfFromJelly,
   )

src/main/scala/eu/neverblink/jelly/cli/command/rdf/RdfFromJelly.scala

@@ -0,0 +1,16 @@
+package eu.neverblink.jelly.cli.command.rdf
+import caseapp.*
+import eu.neverblink.jelly.cli.JellyCommand
+
+case class FromJellyRdfOptions()
+
+object RdfFromJelly extends JellyCommand[FromJellyRdfOptions]:
+  override def names: List[List[String]] = List(
+    List("rdf", "from-jelly"),
+  )
+
+  override def run(options: FromJellyRdfOptions, remainingArgs: RemainingArgs): Unit =
+    // This is a placeholder for the actual implementation
+    println("rdf from-jelly")
+    println(options)
+    println(remainingArgs)

src/test/scala/eu/neverblink/jelly/cli/command/RdfFromJellySpec.scala

@@ -0,0 +1,12 @@
+package eu.neverblink.jelly.cli.command
+
+import eu.neverblink.jelly.cli.command.helpers.*
+import org.scalatest.matchers.should.Matchers
+import org.scalatest.wordspec.AnyWordSpec
+
+class RdfFromJellySpec extends AnyWordSpec with Matchers with CleanUpFilesAfterTest:
+  "rdf from-jelly command" should {
+    "be able to convert a Jelly file to NTriples" in {
+      val jellyFile = DataGenHelper.generateJellyFile(3)
+    }
+  }

src/test/scala/eu/neverblink/jelly/cli/command/helpers/CleanUpFilesAfterTest.scala

@@ -0,0 +1,11 @@
+package eu.neverblink.jelly.cli.command.helpers
+
+import org.scalatest.BeforeAndAfterEach
+import org.scalatest.wordspec.AnyWordSpec
+
+trait CleanUpFilesAfterTest extends BeforeAndAfterEach {
+  this: AnyWordSpec =>
+  override def afterEach(): Unit = {
+    DataGenHelper.cleanUpFile()
+  }
+}

src/test/scala/eu/neverblink/jelly/cli/command/helpers/DataGenHelper.scala

@@ -0,0 +1,50 @@
+package eu.neverblink.jelly.cli.command.helpers
+
+import eu.ostrzyciel.jelly.convert.jena.riot.JellyLanguage
+import org.apache.jena.rdf.model.{Model, ModelFactory, ResourceFactory}
+import org.apache.jena.riot.RDFDataMgr
+
+import java.io.FileOutputStream
+import java.nio.file.{Files, Paths}
+import scala.util.Using
+
+/*
+ * This class will be used to generate test data
+ */
+object DataGenHelper:
+
+  private val testFile = "testInput.jelly"
+
+  /*
+   * This method generates a triple model with nTriples
+   * @param nTriples number of triples to generate
+   * @return Model
+   */
+  def generateTripleModel(nTriples: Int): Model =
+    val model = ModelFactory.createDefaultModel()
+    val subStr = "http://example.org/subject"
+    val predStr = "http://example.org/predicate"
+    val objStr = "http://example.org/object"
+    val tripleList = (1 to nTriples).map { i =>
+      val sub = ResourceFactory.createResource(s"$subStr/$i")
+      val pred = ResourceFactory.createProperty(s"$predStr/$i")
+      val obj = ResourceFactory.createResource(s"$objStr/$i")
+      val stat = ResourceFactory.createStatement(sub, pred, obj)
+      model.add(stat)
+    }
+    model
+
+  /* This method generates a Jelly file with nTriples
+   * @param nTriples number of triples to generate
+   * @param fileName name of the file to generate
+   */
+  def generateJellyFile(nTriples: Int): Unit =
+    val model = generateTripleModel(nTriples)
+    // TODO: Add configurable generation for different variants of Jelly (small strict etc)
+    Using.resource(FileOutputStream(testFile)) { file =>
+      RDFDataMgr.write(file, model, JellyLanguage.JELLY)
+    }
+
+  /* This method cleans up the file after the test*/
+  def cleanUpFile(): Unit =
+    Files.deleteIfExists(Paths.get(testFile))