Add failing test for Files.walk order

SystemFw · Dec 16, 2021 · 9592a1d · 9592a1d
1 parent ed202fa
commit 9592a1d
Showing 1 changed file with 12 additions and 0 deletions.
diff --git a/io/shared/src/test/scala/fs2/io/file/FilesSuite.scala b/io/shared/src/test/scala/fs2/io/file/FilesSuite.scala
@@ -26,6 +26,7 @@ package file
 import cats.effect.{IO, Resource}
 import cats.kernel.Order
 import cats.syntax.all._
+import cats.kernel.instances.order._
 
 import scala.concurrent.duration._
 
@@ -490,6 +491,17 @@ class FilesSuite extends Fs2Suite with BaseFileSuite {
         .foldMonoid
         .assertEquals(31) // the root + 5 children + 5 files per child directory
     }
+
+    test("returns files in order of traversal") {
+      Stream
+        .resource(tempFilesHierarchy)
+        .flatMap(topDir => Files[IO].walk(topDir))
+        .compile
+        .toList
+        .map { paths =>
+          assertEquals(paths, paths.sorted)
+        }
+    }
   }
 
   test("writeRotate") {