Add scalafmt to the repository

.git-blame-ignore-revs

@@ -1,3 +1,7 @@
-# Header whitespace cleanup
+# Header organizing (PR: #959, #963)
 b8564609df3c849b3a258a411e0de645d4e8c7a0
 0b26b5e6dbcf3e6beeca806297f848f41dde899b
+
+# Code formatting (PR: #950)
+ccd98e22a078e1282dbb2c1acfb40fe3afee01b6
+

.scalafmt.conf

@@ -30,5 +30,3 @@ fileOverride {
 project.excludeFilters = [
   "scalafix/*"
 ]
-
-project.includePaths = [] # temporarily disable formatting

bench/src/main/scala/org/scalacheck/bench/GenBench.scala

@@ -16,44 +16,31 @@ import org.scalacheck.Arbitrary.arbitrary
 import org.scalacheck.Gen
 import org.scalacheck.rng.Seed
 
-/**
- * Generator benchmarks
- *
- * Since generators may run very quickly (or very slowly) depending on
- * the seed and size parameter used, we want to make sure these are
- * held constant across runs. Otherwise, we might believe a particular
- * change made a given generator faster (or slower) when in fact we
- * just got lucky (or unlucky).
- *
- * We use `seedCount` to choose how many seeds we will benchmark with.
- * For each seed, we run the given generator. So if `seedCount` is
- * 100, the average time we get is the time to generate values for the
- * 100 seeds we started with.
- *
- * The size parameter also plays a major role in how long generators
- * take. ScalaCheck's default parameters start with 100. You can
- * benchmark additional size parameters to see how changes to this
- * parameter effect generator run time.
- *
- * Finally, a generator's `apply` method may fail to generate a value.
- * This might allow a slow generator that fails 50% of the time to
- * appear faster than other generators that don't fail. Since we
- * expect all generators to be able to succeed, we benchmark using
- * `pureApply`, which will retry up to 100 times before crashing. This
- * way, there's no chance that a flaky generator gets an advantage
- * during benchmarking.
- *
- * In theory, we should do as much work as possible outside the
- * benchmark methods to avoid benchmarking construction time. However,
- * since many generators are constructed inside of `flatMap` calls
- * during generation we do want these constructors to also run as
- * quickly as possible. For that reason, we mostly choose to assemble
- * our generators inside the benchmark methods.
- *
- * Prefer to add new benchmarks instead of modifying existing ones.
- * This will enable us to compare the results for a given benchmark
- * over time.
- */
+/** Generator benchmarks
+  *
+  * Since generators may run very quickly (or very slowly) depending on the seed and size parameter used, we want to
+  * make sure these are held constant across runs. Otherwise, we might believe a particular change made a given
+  * generator faster (or slower) when in fact we just got lucky (or unlucky).
+  *
+  * We use `seedCount` to choose how many seeds we will benchmark with. For each seed, we run the given generator. So if
+  * `seedCount` is 100, the average time we get is the time to generate values for the 100 seeds we started with.
+  *
+  * The size parameter also plays a major role in how long generators take. ScalaCheck's default parameters start with
+  * 100. You can benchmark additional size parameters to see how changes to this parameter effect generator run time.
+  *
+  * Finally, a generator's `apply` method may fail to generate a value. This might allow a slow generator that fails 50%
+  * of the time to appear faster than other generators that don't fail. Since we expect all generators to be able to
+  * succeed, we benchmark using `pureApply`, which will retry up to 100 times before crashing. This way, there's no
+  * chance that a flaky generator gets an advantage during benchmarking.
+  *
+  * In theory, we should do as much work as possible outside the benchmark methods to avoid benchmarking construction
+  * time. However, since many generators are constructed inside of `flatMap` calls during generation we do want these
+  * constructors to also run as quickly as possible. For that reason, we mostly choose to assemble our generators inside
+  * the benchmark methods.
+  *
+  * Prefer to add new benchmarks instead of modifying existing ones. This will enable us to compare the results for a
+  * given benchmark over time.
+  */
 @State(Scope.Benchmark)
 @BenchmarkMode(Array(Mode.AverageTime))
 @OutputTimeUnit(TimeUnit.MICROSECONDS)

build.sbt

@@ -9,10 +9,10 @@ ThisBuild / homepage := Some(url("http://www.scalacheck.org"))
 ThisBuild / licenses := Seq("BSD-3-Clause" -> url("https://opensource.org/licenses/BSD-3-Clause"))
 ThisBuild / developers := List(
   Developer(
-    id    = "rickynils",
-    name  = "Rickard Nilsson",
+    id = "rickynils",
+    name = "Rickard Nilsson",
     email = "rickynils@gmail.com",
-    url   = url("https://github.com/rickynils")
+    url = url("https://github.com/rickynils")
   )
 )
 
@@ -40,8 +40,8 @@ ThisBuild / githubWorkflowAddedJobs ++= Seq(
           "for d in */ ; do cd \"$d\" && sbt test:compile && cd ../ ; done"),
         name = Some("Build examples"))),
     javas = List(Java8),
-    scalas = List((ThisBuild / scalaVersion).value)),
-
+    scalas = List((ThisBuild / scalaVersion).value)
+  ),
   WorkflowJob(
     "bench",
     "Bench",
@@ -50,7 +50,9 @@ ThisBuild / githubWorkflowAddedJobs ++= Seq(
         List("bench/jmh:run -p genSize=0 -p seedCount=0 -bs 1 -wi 0 -i 1 -f 0 -t 1 -r 0 org.scalacheck.bench.GenBench"),
         name = Some("Build benchmark suite"))),
     javas = List(Java8),
-    scalas = List((ThisBuild / scalaVersion).value)))
+    scalas = List((ThisBuild / scalaVersion).value)
+  )
+)
 
 ThisBuild / tlBaseVersion := "1.17"
 ThisBuild / tlMimaPreviousVersions ++= Set(
@@ -63,7 +65,7 @@ ThisBuild / tlMimaPreviousVersions ++= Set(
   "1.15.1",
   "1.15.2",
   "1.15.3",
-  "1.15.4",
+  "1.15.4"
 )
 ThisBuild / tlVersionIntroduced := Map("3" -> "1.15.3")
 
@@ -115,6 +117,6 @@ lazy val bench = project.in(file("bench"))
   .dependsOn(core.jvm)
   .settings(
     name := "scalacheck-bench",
-    fork := true,
+    fork := true
   )
   .enablePlugins(NoPublishPlugin, JmhPlugin)

core/js/src/main/scala/org/scalacheck/Platform.scala

@@ -9,18 +9,18 @@
 
 package org.scalacheck
 
-import Test._
-
 import scala.annotation.nowarn
 import scala.scalajs.reflect.Reflect
 
+import Test._
+
 private[scalacheck] object Platform {
 
   @nowarn("msg=is never used")
   def runWorkers(
-    params: Parameters,
-    workerFun: Int => Result,
-    stop: () => Unit
+      params: Parameters,
+      workerFun: Int => Result,
+      stop: () => Unit
   ): Result = {
     workerFun(0)
   }

core/jvm/src/main/scala/org/scalacheck/Platform.scala

@@ -18,40 +18,41 @@ private[scalacheck] object Platform {
   import util.FreqMap
 
   def runWorkers(
-    params: Parameters,
-    workerFun: Int => Result,
-    stop: () => Unit
+      params: Parameters,
+      workerFun: Int => Result,
+      stop: () => Unit
   ): Result = {
     import params._
 
     def mergeResults(r1: Result, r2: Result): Result = {
       val Result(st1, s1, d1, fm1, _) = r1
       val Result(st2, s2, d2, fm2, _) = r2
       if (st1 != Passed && st1 != Exhausted)
-        Result(st1, s1+s2, d1+d2, fm1++fm2)
+        Result(st1, s1 + s2, d1 + d2, fm1 ++ fm2)
       else if (st2 != Passed && st2 != Exhausted)
-        Result(st2, s1+s2, d1+d2, fm1++fm2)
+        Result(st2, s1 + s2, d1 + d2, fm1 ++ fm2)
       else {
-        if (s1+s2 >= minSuccessfulTests && maxDiscardRatio*(s1+s2) >= (d1+d2))
-          Result(Passed, s1+s2, d1+d2, fm1++fm2)
+        if (s1 + s2 >= minSuccessfulTests && maxDiscardRatio * (s1 + s2) >= (d1 + d2))
+          Result(Passed, s1 + s2, d1 + d2, fm1 ++ fm2)
         else
-          Result(Exhausted, s1+s2, d1+d2, fm1++fm2)
+          Result(Exhausted, s1 + s2, d1 + d2, fm1 ++ fm2)
       }
     }
 
-    if(workers < 2) workerFun(0)
+    if (workers < 2) workerFun(0)
     else {
       import concurrent._
       val tp = java.util.concurrent.Executors.newFixedThreadPool(workers)
       implicit val ec: ExecutionContextExecutor = ExecutionContext.fromExecutor(tp)
       try {
-        val fs = List.range(0,workers) map (idx => Future {
-          params.customClassLoader.foreach(
-            Thread.currentThread.setContextClassLoader(_)
-          )
-          blocking { workerFun(idx) }
-        })
-        val zeroRes = Result(Passed,0,0,FreqMap.empty[Set[Any]])
+        val fs = List.range(0, workers) map (idx =>
+          Future {
+            params.customClassLoader.foreach(
+              Thread.currentThread.setContextClassLoader(_)
+            )
+            blocking { workerFun(idx) }
+          })
+        val zeroRes = Result(Passed, 0, 0, FreqMap.empty[Set[Any]])
         val res =
           if (fs.isEmpty) Future.successful(zeroRes)
           else Future.sequence(fs).map(_.foldLeft(zeroRes)(mergeResults))
@@ -65,7 +66,7 @@ private[scalacheck] object Platform {
 
   @nowarn("msg=is never used")
   def newInstance(name: String, loader: ClassLoader, paramTypes: Seq[Class[_]])(args: Seq[AnyRef]): AnyRef =
-    if(args.nonEmpty) ???
+    if (args.nonEmpty) ???
     else Class.forName(name, true, loader).getDeclaredConstructor().newInstance().asInstanceOf[AnyRef]
 
   def loadModule(name: String, loader: ClassLoader): AnyRef =

core/jvm/src/test/scala/org/scalacheck/ArbitrarySpecification.scala

@@ -26,7 +26,7 @@ object ArbitrarySpecification extends Properties("Arbitrary") {
 
   property("arbChar") =
     Prop.forAll { (c: Char) =>
-      0x0000 <= c && c <= 0xD7FF || 0xE000 <= c && c <= 0xFFFD
+      0x0000 <= c && c <= 0xd7ff || 0xe000 <= c && c <= 0xfffd
     }
 
   property("arbString") =

core/jvm/src/test/scala/org/scalacheck/ChooseSpecification.scala

@@ -9,12 +9,14 @@
 
 package org.scalacheck
 
-import Gen._
-
 import java.time._
 import java.time.temporal.ChronoUnit
 import java.util.Date
-import scala.util.{Try, Success, Failure}
+import scala.util.Failure
+import scala.util.Success
+import scala.util.Try
+
+import Gen._
 
 object ChooseSpecification extends Properties("Choose") with time.OrderingVersionSpecific {
 
@@ -58,9 +60,8 @@ object ChooseSpecification extends Properties("Choose") with time.OrderingVersio
 
   property("choose[ZonedDateTime]") = chooseProp[ZonedDateTime]
 
-  /** Generate a duration which is at least 1 second smaller than the max
-    * duration the type can support. We use this to avoid the incredibly
-    * unlikely event of overflowing in the handle-min-nanos-duration test.
+  /** Generate a duration which is at least 1 second smaller than the max duration the type can support. We use this to
+    * avoid the incredibly unlikely event of overflowing in the handle-min-nanos-duration test.
     */
   lazy val genOneSecondLessThanMaxDuration: Gen[Duration] =
     Gen.choose(Duration.ofSeconds(Long.MinValue), Duration.ofSeconds(Long.MaxValue - 1L, 999999999L))
@@ -78,9 +79,8 @@ object ChooseSpecification extends Properties("Choose") with time.OrderingVersio
       checkChoose(min, max)
     }
 
-  /** Generate an Instant which is at least 1 second smaller than the max
-    * Instant the type can support. We use this to avoid the incredibly
-    * unlikely event of overflowing in the handle-min-nanos-instant test.
+  /** Generate an Instant which is at least 1 second smaller than the max Instant the type can support. We use this to
+    * avoid the incredibly unlikely event of overflowing in the handle-min-nanos-instant test.
     */
   lazy val genOneSecondLessThanMaxInstant: Gen[Instant] =
     Gen.choose(Instant.MIN, Instant.MAX.minusSeconds(1L))

core/jvm/src/test/scala/org/scalacheck/CogenSpecification.scala

@@ -14,15 +14,15 @@ import org.scalacheck.Gen.listOfN
 import org.scalacheck.GenSpecification.arbSeed
 import org.scalacheck.Prop.forAll
 import org.scalacheck.rng.Seed
-import ScalaVersionSpecific._
 
+import java.time._
+import java.util.UUID
 import scala.collection.immutable.SortedMap
 import scala.collection.immutable.SortedSet
-import scala.concurrent.duration.{Duration, FiniteDuration}
+import scala.concurrent.duration.Duration
+import scala.concurrent.duration.FiniteDuration
 import scala.util.Try
-
-import java.time._
-import java.util.UUID
+import ScalaVersionSpecific._
 
 object CogenSpecification extends Properties("Cogen") {
 
@@ -82,7 +82,7 @@ object CogenSpecification extends Properties("Cogen") {
   implicit def arbFunction0[A: Arbitrary]: Arbitrary[() => A] =
     Arbitrary(arbitrary[A].map(() => _))
 
-  implicit def arbCogen[A: Arbitrary : Cogen]: Arbitrary[Cogen[A]] =
+  implicit def arbCogen[A: Arbitrary: Cogen]: Arbitrary[Cogen[A]] =
     Arbitrary(arbitrary[A => A].map(Cogen[A].contramap(_)))
 
   // Cogens should follow these laws.
@@ -94,19 +94,19 @@ object CogenSpecification extends Properties("Cogen") {
     In particular, if the space of the input is larger than the space of the seed (2^256) there is a
     possibility of legitimate collisions, but this is vanishingly small for the sample sizes we are using.
      */
-    def uniqueness[A: Equal : Arbitrary : Cogen]: Prop =
+    def uniqueness[A: Equal: Arbitrary: Cogen]: Prop =
       forAll { (seed: Seed, as: List[A]) =>
         as.map(Cogen[A].perturb(seed, _)).toSet.size == distinct(as).size
       }
 
     // A Cogen should always generate the same output for a given seed and input.
-    def consistency[A: Arbitrary : Cogen]: Prop =
+    def consistency[A: Arbitrary: Cogen]: Prop =
       forAll { (seed: Seed, a: A) =>
         Cogen[A].perturb(seed, a) == Cogen[A].perturb(seed, a)
       }
   }
 
-  def cogenLaws[A: Equal : Arbitrary : Cogen]: Properties =
+  def cogenLaws[A: Equal: Arbitrary: Cogen]: Properties =
     new Properties("cogenLaws") {
       property("uniqueness") = CogenLaws.uniqueness[A]
       property("consistency") = CogenLaws.consistency[A]
@@ -116,16 +116,18 @@ object CogenSpecification extends Properties("Cogen") {
   object ContravariantLaws {
 
     // Contramapping over a Cogen with the identity function should return the Cogen unchanged.
-    def identity[A: Equal : Arbitrary : Cogen]: Prop =
+    def identity[A: Equal: Arbitrary: Cogen]: Prop =
       forAll { (fa: Cogen[A]) =>
         Equal[Cogen[A]].equal(fa.contramap(a => a), fa)
       }
 
     // Contramapping with f and g is the same as contramapping with the composition of f and g.
-    def composition[A, B, C](implicit eq: Equal[Cogen[C]],
-                             arb1: Arbitrary[Cogen[A]],
-                             arb2: Arbitrary[B => A],
-                             arb3: Arbitrary[C => B]): Prop =
+    def composition[A, B, C](implicit
+        eq: Equal[Cogen[C]],
+        arb1: Arbitrary[Cogen[A]],
+        arb2: Arbitrary[B => A],
+        arb3: Arbitrary[C => B]
+    ): Prop =
       forAll { (fa: Cogen[A], f: B => A, g: C => B) =>
         Equal[Cogen[C]].equal(fa.contramap(f).contramap(g), fa.contramap(f compose g))
       }