Add samples for contentToString and contentDeepToString array operations

libraries/stdlib/samples/test/samples/collections/arrays.kt

@@ -0,0 +1,48 @@
+/*
+ * Copyright 2010-2017 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package samples.collections
+
+import samples.*
+import kotlin.test.*
+
+
+@RunWith(Enclosed::class)
+class Arrays {
+
+    class ContentOperations {
+
+        @Sample
+        fun contentToString() {
+            val array = arrayOf("apples", "oranges", "lime")
+
+            assertPrints(array.contentToString(), "[apples, oranges, lime]")
+        }
+
+        @Sample
+        fun contentDeepToString() {
+            val matrix = arrayOf(
+                    intArrayOf(3, 7, 9),
+                    intArrayOf(0, 1, 0),
+                    intArrayOf(2, 4, 8)
+            )
+
+            assertPrints(matrix.contentDeepToString(), "[[3, 7, 9], [0, 1, 0], [2, 4, 8]]")
+        }
+
+    }
+
+}