Add explicit tests for helper methods

typelevel · Jun 25, 2020 · 5ea21c1 · 5ea21c1
1 parent d696164
commit 5ea21c1
Show file tree

Hide file tree

Showing 2 changed files with 26 additions and 0 deletions.
diff --git a/kernel/src/main/scala/cats/kernel/Enumerable.scala b/kernel/src/main/scala/cats/kernel/Enumerable.scala
@@ -75,6 +75,8 @@ object BoundedEnumerable {
     cats.kernel.instances.long.catsKernelStdOrderForLong
   implicit def catsKernelBoundedEnumerableForChar: BoundedEnumerable[Char] =
     cats.kernel.instances.char.catsKernelStdOrderForChar
+
+  @inline def apply[A](implicit e: BoundedEnumerable[A]): BoundedEnumerable[A] = e
 }
 
 trait LowerBoundedEnumerable[@sp A] extends PartialNextLowerBounded[A] with Next[A] {

diff --git a/tests/src/test/scala/cats/tests/BoundedEnumerableSuite.scala b/tests/src/test/scala/cats/tests/BoundedEnumerableSuite.scala
@@ -0,0 +1,24 @@
+package cats.tests
+
+import cats.kernel.BoundedEnumerable
+
+
+class BoundedEnumerableSuite extends CatsSuite {
+
+  test("membersAscending") {
+    BoundedEnumerable[Boolean].membersAscending.toList should ===(List(false, true))
+  }
+
+  test("membersDescending") {
+    BoundedEnumerable[Boolean].membersDescending.toList should ===(List(true, false))
+  }
+
+  test("cycleNext") {
+    BoundedEnumerable[Boolean].cycleNext(false) should === (true)
+  }
+
+  test("cyclePrevious") {
+    BoundedEnumerable[Boolean].cyclePrevious(false) should === (true)
+  }
+
+}