Add Collections.isNullOrEmpty #KT-23279

2018-02-20 10:03:27 -06:00
parent 6a140fb9ed
commit 292f69936b
2 changed files with 26 additions and 0 deletions
@@ -51,6 +51,18 @@ class Collections {
            assertPrints(collection.orEmpty(), "[a, b, c]")
        }

+        @Sample
+        fun collectionIsNullOrEmpty() {
+            val nullCollection: Collection<Any>? = null
+            assertTrue(nullCollection.isNullOrEmpty())
+
+            val emptyCollection: Collection<Any>? = listOf()
+            assertTrue(emptyCollection.isNullOrEmpty())
+
+            val collection: Collection<Char>? = listOf('a', 'b', 'c')
+            assertFalse(collection.isNullOrEmpty())
+        }
+
        @Sample
        fun collectionContainsAll() {
            val collection = mutableListOf('a', 'b')