[stdlib] Don't test internal APIs in validation

Swift SVN r22190

test/stdlib/Unicode.swift

@@ -0,0 +1,45 @@
+//===--- Unicode.swift ----------------------------------------------------===//
+//
+// This source file is part of the Swift.org open source project
+//
+// Copyright (c) 2014 - 2015 Apple Inc. and the Swift project authors
+// Licensed under Apache License v2.0 with Runtime Library Exception
+//
+// See http://swift.org/LICENSE.txt for license information
+// See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
+//
+//===----------------------------------------------------------------------===//
+// RUN: %target-build-swift -Xfrontend -disable-access-control %s -o %t.out
+// RUN: %target-run %t.out
+
+import StdlibUnittest
+
+var UnicodeInternals = TestSuite("UnicodeInternals")
+
+UnicodeInternals.test("copy") {
+  var u8: [UTF8.CodeUnit] = [ 0, 1, 2, 3, 4, 5 ]
+  var u16: [UTF16.CodeUnit] = [ 6, 7, 8, 9, 10, 11 ]
+
+  u16.withUnsafeMutableBufferPointer {
+    (u16)->() in
+    let p16 = u16.baseAddress
+
+    u8.withUnsafeMutableBufferPointer {
+      (u8)->() in
+      let p8 = u8.baseAddress
+
+      UTF16.copy(p8, destination: p16, count: 3)
+      expectEqual([ 0, 1, 2, 9, 10, 11 ], Array(u16))
+
+      UTF16.copy(p16 + 3, destination: p8, count: 3)
+      expectEqual([ 9, 10, 11, 3, 4, 5 ], Array(u8))
+
+      UTF16.copy(p16, destination: p16 + 3, count: 3)
+      expectEqual([ 0, 1, 2, 0, 1, 2 ], Array(u16))
+
+      UTF16.copy(p8, destination: p8 + 3, count: 3)
+      expectEqual([ 9, 10, 11, 9, 10, 11 ], Array(u8))
+    }
+  }
+}
+