Add Gen.genIP4

Author: japgolly

doc/changelog/1.1.0.md

@@ -11,5 +11,7 @@
     GenJson(4).sample()
   ```
 
+* Added `Gen.ip4: Gen[java.net.InetAddress]` for generating random IP4 addresses
+
 * Update Scala.js to 1.10
 * Update Scala 3 to 3.1

gen/shared/src/main/scala/nyaya/gen/Gen.scala

@@ -2,6 +2,7 @@ package nyaya.gen
 
 import cats.data._
 import cats.{Distributive, Eval, Functor, Monad, Traverse, ~>}
+import java.net.InetAddress
 import java.time.ZoneId
 import java.util.UUID
 import scala.annotation.{switch, tailrec}
@@ -879,6 +880,13 @@ object Gen {
   def dateTime(implicit genNow: Gen[Now]): DateTimeBuilder =
     DateTimeBuilder.default(genNow)
 
+  // ------------------
+  // Networking related
+  // ------------------
+
+  lazy val ip4: Gen[InetAddress] =
+    Gen.byte.arraySeq(4).map(a => InetAddress.getByAddress(a.toArray))
+
   // --------------------------------------------------------------
   // Traverse using plain Scala collections and CanBuildFrom (fast)
   // --------------------------------------------------------------