Remove multiple implicitly calls. Still getting: Pojo does not take parameters

Author: fpopic

build.sbt

@@ -5,7 +5,14 @@ inThisBuild(
   Seq(
     version := "0.1",
     scalaVersion := "2.13.5",
-    scalacOptions ++= "-Ymacro-annotations" :: "-language:experimental.macros" :: Nil
+    scalacOptions ++= Seq(
+      "-Ymacro-annotations",
+      "-language:experimental.macros",
+      //"-Xlog-implicits",
+      "-Ymacro-debug-lite"
+    ),
+    // for nicer error messages
+    addCompilerPlugin("io.tryp" % "splain" % "0.5.8" cross CrossVersion.patch)
   )
 )
 
@@ -28,6 +35,7 @@ lazy val `scala-macros-usage` = (project in file("scala-macros-usage"))
     libraryDependencies ++= Seq(
       scalaPbRuntime,
       beamSdksJavaCore,
-      beamRunnersDirectJava
+      beamRunnersDirectJava,
+      scalaTest
     )
   )

project/Dependencies.scala

@@ -7,4 +7,6 @@ object Dependencies {
   val beamVersion = "2.28.0"
   val beamSdksJavaCore = "org.apache.beam" % "beam-sdks-java-core" % beamVersion
   val beamRunnersDirectJava = "org.apache.beam" % "beam-runners-direct-java" % beamVersion % Runtime
+
+  val scalaTest = "org.scalatest" %% "scalatest" % "3.2.7" % Test
 }

scala-macros-usage/src/main/scala/com/github/fpopic/scalamacros/AnnotationMacroUsage.scala

@@ -0,0 +1,33 @@
+package com.github.fpopic.scalamacros.beam
+
+import org.apache.beam.sdk.coders.Coder
+import org.scalatest.flatspec.AnyFlatSpec
+import org.scalatest.matchers.should.Matchers
+
+import java.io.{ByteArrayInputStream, ByteArrayOutputStream}
+
+class DefMacroCoderSpec extends AnyFlatSpec with Matchers {
+
+  behavior of "DefMacroCoder"
+
+  private case class Pojo(s: String, i: Int, l: List[Int])
+  // TODO try with nested class (check magnolia)
+  // e.g case class Nojo(a: String, p: Pojo)
+
+  it should "generate a coder and serialize/deserialize properly the value." in {
+
+    val coder: Coder[Pojo] = DefMacroCoder.productCoder[Pojo]
+
+    val pojo = Pojo(s = "4", i = 1, l = List(2, 3))
+
+    val encoded: Array[Byte] = {
+      val os = new ByteArrayOutputStream()
+      coder.encode(pojo, os)
+      os.toByteArray
+    }
+    val decoded: Pojo = coder.decode(new ByteArrayInputStream(encoded))
+
+    pojo shouldBe decoded
+  }
+
+}