Add Sequence.orEmpty #KT-16552 Fixed

2018-06-15 16:25:14 +09:00
parent 2ce0bca34e
commit c4b785de36
3 changed files with 28 additions and 0 deletions
@@ -7,6 +7,7 @@ import kotlin.coroutines.experimental.buildSequence

@RunWith(Enclosed::class)
 class Sequences {
+
    class Building {

        @Sample
@@ -158,6 +159,17 @@ class Sequences {

    }

+    class Usage {
+
+        @Sample
+        fun sequenceOrEmpty() {
+            val nullSequence: Sequence<Int>? = null
+            assertPrints(nullSequence.orEmpty().toList(), "[]")
+
+            val sequence: Sequence<Int>? = sequenceOf(1, 2, 3)
+            assertPrints(sequence.orEmpty().toList(), "[1, 2, 3]")
+        }
+    }

    class Transformations {