Cross-build for Scala.js

build.sbt

@@ -12,13 +12,15 @@ val compilerOptions = Seq(
   "-Ywarn-numeric-widen"
 )
 
-val circeVersion = "0.14.1"
+val circeVersion = "0.15.0-M1"
 val fs2Version = "3.0.6"
 val jawnVersion = "1.2.0"
 val previousCirceFs2Version = "0.13.0"
 
 val scalaTestVersion = "3.2.9"
 val scalaTestPlusVersion = "3.2.9.0"
+val catsEffectTestingVersion = "1.1.1"
+val scalacheckEffectVersion = "1.0.2"
 
 val scala212 = "2.12.14"
 val scala213 = "2.13.6"
@@ -60,20 +62,23 @@ val allSettings = baseSettings ++ publishSettings
 
 val docMappingsApiDir = settingKey[String]("Subdirectory in site target directory for API docs")
 
-val fs2 = project
+val fs2 = crossProject(JVMPlatform, JSPlatform)
+  .crossType(CrossType.Pure)
   .in(file("."))
   .settings(allSettings)
   .settings(
     moduleName := "circe-fs2",
     mimaPreviousArtifacts := Set("io.circe" %% "circe-fs2" % previousCirceFs2Version),
     libraryDependencies ++= Seq(
-      "co.fs2" %% "fs2-core" % fs2Version,
-      "io.circe" %% "circe-jawn" % circeVersion,
-      "io.circe" %% "circe-generic" % circeVersion % Test,
-      "io.circe" %% "circe-testing" % circeVersion % Test,
-      "org.scalatest" %% "scalatest" % scalaTestVersion % Test,
-      "org.scalatestplus" %% "scalacheck-1-15" % scalaTestPlusVersion % Test,
-      "org.typelevel" %% "jawn-parser" % jawnVersion
+      "co.fs2" %%% "fs2-core" % fs2Version,
+      "io.circe" %%% "circe-jawn" % circeVersion,
+      "io.circe" %%% "circe-generic" % circeVersion % Test,
+      "io.circe" %%% "circe-testing" % circeVersion % Test,
+      "org.scalatest" %%% "scalatest" % scalaTestVersion % Test,
+      "org.scalatestplus" %%% "scalacheck-1-15" % scalaTestPlusVersion % Test,
+      "org.typelevel" %%% "cats-effect-testing-scalatest" % catsEffectTestingVersion % Test,
+      "org.typelevel" %%% "scalacheck-effect" % scalacheckEffectVersion,
+      "org.typelevel" %%% "jawn-parser" % jawnVersion
     ),
     ghpagesNoJekyll := true,
     docMappingsApiDir := "api",

project/plugins.sbt

@@ -8,3 +8,5 @@ addSbtPlugin("com.typesafe.sbt" % "sbt-site" % "1.4.1")
 addSbtPlugin("org.scalameta" % "sbt-scalafmt" % "2.4.3")
 addSbtPlugin("org.scalastyle" %% "scalastyle-sbt-plugin" % "1.0.0")
 addSbtPlugin("org.scoverage" % "sbt-scoverage" % "1.8.2")
+addSbtPlugin("org.portable-scala" % "sbt-scalajs-crossproject" % "1.1.0")
+addSbtPlugin("org.scala-js" % "sbt-scalajs" % "1.6.0")

src/test/scala/io/circe/fs2/CirceSuite.scala

@@ -1,18 +1,28 @@
 package io.circe.fs2
 
+import cats.effect.testing.scalatest.AssertingSyntax
+import cats.effect.testing.scalatest.EffectTestSupport
+import cats.effect.unsafe.IORuntime
 import cats.instances.AllInstances
-import cats.syntax.{ AllSyntax, EitherOps }
-import io.circe.testing.{ ArbitraryInstances, EqInstances }
-import org.scalatest.flatspec.AnyFlatSpec
-import org.scalatestplus.scalacheck.{ Checkers, ScalaCheckDrivenPropertyChecks }
+import cats.syntax.AllSyntax
+import cats.syntax.EitherOps
+import io.circe.testing.ArbitraryInstances
+import io.circe.testing.EqInstances
+import org.scalatest.flatspec.AsyncFlatSpec
+import org.scalatestplus.scalacheck.Checkers
+import org.scalatestplus.scalacheck.ScalaCheckDrivenPropertyChecks
 import org.typelevel.discipline.Laws
+
 import scala.language.implicitConversions
+import cats.effect.unsafe.IORuntimeConfig
 
 /**
  * An opinionated stack of traits to improve consistency and reduce boilerplate in circe tests.
  */
 trait CirceSuite
-    extends AnyFlatSpec
+    extends AsyncFlatSpec
+    with AssertingSyntax
+    with EffectTestSupport
     with ScalaCheckDrivenPropertyChecks
     with AllInstances
     with AllSyntax
@@ -23,6 +33,8 @@ trait CirceSuite
 
   implicit def prioritizedCatsSyntaxEither[A, B](eab: Either[A, B]): EitherOps[A, B] = new EitherOps(eab)
 
+  implicit def ioRuntime = IORuntime(executionContext, executionContext, IORuntime.global.scheduler, () => (), IORuntimeConfig())
+
   def checkLaws(name: String, ruleSet: Laws#RuleSet): Unit = ruleSet.all.properties.zipWithIndex.foreach {
     case ((id, prop), 0) => name should s"obey $id" in Checkers.check(prop)
     case ((id, prop), _) => it should s"obey $id" in Checkers.check(prop)

src/test/scala/io/circe/fs2/Fs2Suite.scala

@@ -1,13 +1,22 @@
 package io.circe.fs2
 
-import _root_.fs2.{ Pipe, Stream, text }
+import _root_.fs2.Pipe
+import _root_.fs2.Stream
+import _root_.fs2.text
 import cats.effect.IO
-import cats.effect.unsafe.implicits._
-import io.circe.{ DecodingFailure, Json, ParsingFailure }
+import io.circe.DecodingFailure
+import io.circe.Json
+import io.circe.ParsingFailure
 import io.circe.fs2.examples._
 import io.circe.generic.auto._
 import io.circe.syntax._
+import org.scalacheck.Prop
+import org.scalacheck.effect.PropF
+import org.scalatest.compatible.Assertion
+import org.scalatest.enablers.WheneverAsserting
+import org.scalatest.exceptions.DiscardedEvaluationException
 import org.typelevel.jawn.AsyncParser
+
 import scala.collection.immutable.{ Stream => StdStream }
 
 class Fs2Suite extends CirceSuite {
@@ -34,14 +43,21 @@ class Fs2Suite extends CirceSuite {
   }
 
   "stringParser" should "parse single value" in {
-    forAll { (foo: Foo) =>
+    PropF.forAllF { (foo: Foo) =>
       val stream = serializeFoos(AsyncParser.SingleValue, Stream.emit(foo))
-      assert(
-        stream.through(stringParser(AsyncParser.SingleValue)).compile.toVector.attempt.unsafeRunSync() === Right(
-          Vector(foo.asJson)
+      stream
+        .through(stringParser(AsyncParser.SingleValue))
+        .compile
+        .toVector
+        .attempt
+        .map(r =>
+          assert(
+            r === Right(
+              Vector(foo.asJson)
+            )
+          )
         )
-      )
-    }
+    }.check().map(r => assert(r.passed))
   }
 
   "byteArrayParser" should "parse bytes wrapped in array" in {
@@ -53,31 +69,27 @@ class Fs2Suite extends CirceSuite {
   }
 
   "byteParser" should "parse single value" in {
-    forAll { (foo: Foo) =>
+    PropF.forAllF { (foo: Foo) =>
       val stream = serializeFoos(AsyncParser.SingleValue, Stream.emit(foo))
-      assert(
-        stream
-          .through(text.utf8Encode)
-          .through(byteParser(AsyncParser.SingleValue))
-          .compile
-          .toVector
-          .attempt
-          .unsafeRunSync() === Right(Vector(foo.asJson))
-      )
-    }
+      stream
+        .through(text.utf8Encode)
+        .through(byteParser(AsyncParser.SingleValue))
+        .compile
+        .toVector
+        .attempt
+        .map(r => assert(r === Right(Vector(foo.asJson))))
+    }.check().map(r => assert(r.passed))
   }
 
   "byteParser" should "parse single value, when run twice" in {
-    forAll { (foo: Foo) =>
+    PropF.forAllF { (foo: Foo) =>
       val stream = serializeFoos(AsyncParser.SingleValue, Stream.emit(foo))
 
       val parseOnce =
         stream.through(text.utf8Encode).through(byteParser(AsyncParser.SingleValue)).compile.toVector
 
-      parseOnce.attempt.unsafeRunSync()
-
-      assert(parseOnce.attempt.unsafeRunSync() == Right(Vector(foo.asJson)))
-    }
+      (parseOnce.attempt >> parseOnce.attempt).map(r => assert(r == Right(Vector(foo.asJson))))
+    }.check().map(r => assert(r.passed))
   }
 
   "byteArrayParserC" should "parse bytes wrapped in array" in {
@@ -89,32 +101,38 @@ class Fs2Suite extends CirceSuite {
   }
 
   "byteParserC" should "parse single value" in {
-    forAll { (foo: Foo) =>
+    PropF.forAllF { (foo: Foo) =>
       val stream = serializeFoos(AsyncParser.SingleValue, Stream.emit(foo))
-      assert(
-        stream
-          .through(text.utf8Encode)
-          .chunks
-          .through(byteParserC(AsyncParser.SingleValue))
-          .compile
-          .toVector
-          .attempt
-          .unsafeRunSync() === Right(Vector(foo.asJson))
-      )
-    }
+      stream
+        .through(text.utf8Encode)
+        .chunks
+        .through(byteParserC(AsyncParser.SingleValue))
+        .compile
+        .toVector
+        .attempt
+        .map(r => assert(r === Right(Vector(foo.asJson))))
+    }.check().map(r => assert(r.passed))
   }
 
   "decoder" should "decode enumerated JSON values" in
-    forAll { (fooStdStream: StdStream[Foo], fooVector: Vector[Foo]) =>
+    PropF.forAllF { (fooStdStream: StdStream[Foo], fooVector: Vector[Foo]) =>
       val stream = serializeFoos(AsyncParser.UnwrapArray, fooStream(fooStdStream, fooVector))
       val foos = fooStdStream ++ fooVector
 
-      assert(
-        stream.through(stringArrayParser).through(decoder[IO, Foo]).compile.toVector.attempt.unsafeRunSync() === Right(
-          foos.toVector
+      stream
+        .through(stringArrayParser)
+        .through(decoder[IO, Foo])
+        .compile
+        .toVector
+        .attempt
+        .map(r =>
+          assert(
+            r === Right(
+              foos.toVector
+            )
+          )
         )
-      )
-    }
+    }.check().map(r => assert(r.passed))
 
   "stringArrayParser" should "return ParsingFailure" in {
     testParsingFailure(_.through(stringArrayParser))
@@ -141,7 +159,7 @@ class Fs2Suite extends CirceSuite {
   }
 
   "decoder" should "return DecodingFailure" in
-    forAll { (fooStdStream: StdStream[Foo], fooVector: Vector[Foo]) =>
+    PropF.forAllF { (fooStdStream: StdStream[Foo], fooVector: Vector[Foo]) =>
       sealed trait Foo2
       case class Bar2(x: String) extends Foo2
 
@@ -152,29 +170,41 @@ class Fs2Suite extends CirceSuite {
           .compile
           .toVector
           .attempt
-          .unsafeRunSync()
 
-        assert(result.isLeft && result.left.get.isInstanceOf[DecodingFailure])
+        result.map(r => assert(r.isLeft && r.left.get.isInstanceOf[DecodingFailure]))
       }
-    }
+    }.check().map(r => assert(r.passed))
 
   private def testParser(mode: AsyncParser.Mode, through: Pipe[IO, String, Json]) =
-    forAll { (fooStdStream: StdStream[Foo], fooVector: Vector[Foo]) =>
+    PropF.forAllF { (fooStdStream: StdStream[Foo], fooVector: Vector[Foo]) =>
       val stream = serializeFoos(mode, fooStream(fooStdStream, fooVector))
       val foos = (fooStdStream ++ fooVector).map(_.asJson)
 
-      assert(stream.through(through).compile.toVector.attempt.unsafeRunSync() === Right(foos.toVector))
-    }
+      stream.through(through).compile.toVector.attempt.map(r => assert(r === Right(foos.toVector)))
+    }.check().asserting(r => assert(r.passed))
 
   private def testParsingFailure(through: Pipe[IO, String, Json]) =
-    forAll { (stringStdStream: StdStream[String], stringVector: Vector[String]) =>
-      val result = Stream("}")
-        .append(stringStream(stringStdStream, stringVector))
-        .through(through)
-        .compile
-        .toVector
-        .attempt
-        .unsafeRunSync()
-      assert(result.isLeft && result.left.get.isInstanceOf[ParsingFailure])
+    PropF.forAllF { (stringStdStream: StdStream[String], stringVector: Vector[String]) =>
+      val result =
+        Stream("}").append(stringStream(stringStdStream, stringVector)).through(through).compile.toVector.attempt
+      result.map(result => assert(result.isLeft && result.left.get.isInstanceOf[ParsingFailure]))
+    }.check().asserting(r => assert(r.passed))
+
+  private implicit def assertionToProp: IO[Assertion] => PropF[IO] = { assertion =>
+    assertion.as(PropF.Result[IO](Prop.True, Nil, Set.empty, Set.empty): PropF[IO]).handleError {
+      case _: DiscardedEvaluationException => PropF.Result[IO](Prop.Undecided, Nil, Set.empty, Set.empty)
+      case t                               => PropF.Result[IO](Prop.Exception(t), Nil, Set.empty, Set.empty)
     }
+  }
+
+  private implicit def assertingNatureOfIO: WheneverAsserting[IO[Assertion]] { type Result = IO[Assertion] } =
+    new WheneverAsserting[IO[Assertion]] {
+      type Result = IO[Assertion]
+      def whenever(condition: Boolean)(fun: => IO[Assertion]): IO[Assertion] =
+        if (!condition)
+          IO.raiseError[Assertion](new DiscardedEvaluationException)
+        else
+          fun
+    }
+
 }