Just another update

Task/URL-decoding/Scala/url-decoding.scala

@@ -1,4 +1,16 @@
-import java.net._
-val encoded="http%3A%2F%2Ffoo%20bar%2F"
-val decoded=URLDecoder.decode(encoded, "UTF-8")
-println(decoded)   // -> http://foo bar/
+import java.net.{URLDecoder, URLEncoder}
+import scala.compat.Platform.currentTime
+
+object UrlCoded extends App {
+  val original = """http://foo bar/"""
+  val encoded: String = URLEncoder.encode(original, "UTF-8")
+
+  assert(encoded == "http%3A%2F%2Ffoo+bar%2F", s"Original: $original not properly encoded: $encoded")
+
+  val percentEncoding = encoded.replace("+", "%20")
+  assert(percentEncoding == "http%3A%2F%2Ffoo%20bar%2F", s"Original: $original not properly percent-encoded: $percentEncoding")
+
+  assert(URLDecoder.decode(encoded, "UTF-8") == URLDecoder.decode(percentEncoding, "UTF-8"))
+
+  println(s"Successfully completed without errors. [total ${currentTime - executionStart} ms]")
+}