Backport List/Map/Set.copyOf factories
Test: tools/test.py --dex_vm all --no-internal -v *Backport*Test*
Test: tools/test.py --no-internal -v *GenerateBackportMethods*
Change-Id: I18521bbdfd8b72eaaa78b4cc09ea5d06a44ec6f3
diff --git a/src/test/examplesJava10/backport/SetBackportJava10Main.java b/src/test/examplesJava10/backport/SetBackportJava10Main.java
new file mode 100644
index 0000000..b8fb356
--- /dev/null
+++ b/src/test/examplesJava10/backport/SetBackportJava10Main.java
@@ -0,0 +1,74 @@
+// Copyright (c) 2019, the R8 project authors. Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+package backport;
+
+import java.util.Arrays;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Set;
+
+public class SetBackportJava10Main {
+
+ public static void main(String[] args) {
+ testCopyOf();
+ }
+
+ private static void testCopyOf() {
+ Object anObject0 = new Object();
+ Object anObject1 = new Object();
+ List<Object> original = Arrays.asList(anObject0, anObject1);
+ Set<Object> copy = Set.copyOf(original);
+ assertEquals(2, copy.size());
+ assertEquals(new HashSet<>(original), copy);
+ assertTrue(copy.contains(anObject0));
+ assertTrue(copy.contains(anObject1));
+ assertMutationNotAllowed(copy);
+
+ // Mutate the original backing collection and ensure it's not reflected in copy.
+ Object newObject = new Object();
+ original.set(0, newObject);
+ assertFalse(copy.contains(newObject));
+
+ // Ensure duplicates are allowed and are de-duped.
+ assertEquals(Set.of(1, 2), Set.copyOf(List.of(1, 2, 1, 2)));
+
+ try {
+ Set.copyOf(null);
+ throw new AssertionError();
+ } catch (NullPointerException expected) {
+ }
+ try {
+ Set.copyOf(Arrays.asList(1, null, 2));
+ throw new AssertionError();
+ } catch (NullPointerException expected) {
+ }
+ }
+
+ private static void assertMutationNotAllowed(Set<Object> ofObject) {
+ try {
+ ofObject.add(new Object());
+ throw new AssertionError();
+ } catch (UnsupportedOperationException expected) {
+ }
+ }
+
+ private static void assertTrue(boolean value) {
+ if (!value) {
+ throw new AssertionError("Expected <true> but was <false>");
+ }
+ }
+
+ private static void assertFalse(boolean value) {
+ if (value) {
+ throw new AssertionError("Expected <false> but was <true>");
+ }
+ }
+
+ private static void assertEquals(Object expected, Object actual) {
+ if (expected != actual && !expected.equals(actual)) {
+ throw new AssertionError("Expected <" + expected + "> but was <" + actual + ">");
+ }
+ }
+}
