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/ListBackportJava10Main.java b/src/test/examplesJava10/backport/ListBackportJava10Main.java
new file mode 100644
index 0000000..376f67a
--- /dev/null
+++ b/src/test/examplesJava10/backport/ListBackportJava10Main.java
@@ -0,0 +1,67 @@
+// 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.List;
+
+public class ListBackportJava10Main {
+
+ 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);
+ List<Object> copy = List.copyOf(original);
+ assertEquals(2, copy.size());
+ assertEquals(original, copy);
+ assertSame(anObject0, copy.get(0));
+ assertSame(anObject1, copy.get(1));
+ assertMutationNotAllowed(copy);
+
+ // Mutate the original backing collection and ensure it's not reflected in copy.
+ original.set(0, new Object());
+ assertSame(anObject0, copy.get(0));
+
+ try {
+ List.copyOf(null);
+ throw new AssertionError();
+ } catch (NullPointerException expected) {
+ }
+ try {
+ List.copyOf(Arrays.asList(1, null, 2));
+ throw new AssertionError();
+ } catch (NullPointerException expected) {
+ }
+ }
+
+ private static void assertMutationNotAllowed(List<Object> ofObject) {
+ try {
+ ofObject.add(new Object());
+ throw new AssertionError();
+ } catch (UnsupportedOperationException expected) {
+ }
+ try {
+ ofObject.set(0, new Object());
+ throw new AssertionError();
+ } catch (UnsupportedOperationException expected) {
+ }
+ }
+
+ private static void assertSame(Object expected, Object actual) {
+ if (expected != actual) {
+ throw new AssertionError("Expected <" + expected + "> but was <" + actual + ">");
+ }
+ }
+
+ private static void assertEquals(Object expected, Object actual) {
+ if (expected != actual && !expected.equals(actual)) {
+ throw new AssertionError("Expected <" + expected + "> but was <" + actual + ">");
+ }
+ }
+}
diff --git a/src/test/examplesJava10/backport/MapBackportJava10Main.java b/src/test/examplesJava10/backport/MapBackportJava10Main.java
new file mode 100644
index 0000000..95413e9
--- /dev/null
+++ b/src/test/examplesJava10/backport/MapBackportJava10Main.java
@@ -0,0 +1,82 @@
+// 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.HashMap;
+import java.util.Map;
+
+public class MapBackportJava10Main {
+
+ public static void main(String[] args) {
+ testCopyOf();
+ }
+
+ private static void testCopyOf() {
+ Object key0 = new Object();
+ Object value0 = new Object();
+ Object key1 = new Object();
+ Object value1 = new Object();
+ Map<Object, Object> original = new HashMap<>();
+ original.put(key0, value0);
+ original.put(key1, value1);
+ Map<Object, Object> copy = Map.copyOf(original);
+ assertEquals(2, copy.size());
+ assertEquals(original, copy);
+ assertSame(value0, copy.get(key0));
+ assertSame(value1, copy.get(key1));
+ assertMutationNotAllowed(copy);
+
+ // Mutate the original backing collection and ensure it's not reflected in copy.
+ original.put(key0, new Object());
+ assertSame(value0, copy.get(key0));
+
+ try {
+ Map.copyOf(null);
+ throw new AssertionError();
+ } catch (NullPointerException expected) {
+ }
+ try {
+ Map<Object, Object> map = new HashMap<>();
+ map.put(null, new Object());
+ Map.copyOf(map);
+ throw new AssertionError();
+ } catch (NullPointerException expected) {
+ }
+ try {
+ Map<Object, Object> map = new HashMap<>();
+ map.put(new Object(), null);
+ Map.copyOf(map);
+ throw new AssertionError();
+ } catch (NullPointerException expected) {
+ }
+ }
+
+ private static void assertMutationNotAllowed(Map<Object, Object> ofObject) {
+ try {
+ ofObject.put(new Object(), new Object());
+ throw new AssertionError();
+ } catch (UnsupportedOperationException expected) {
+ }
+ for (Map.Entry<Object, Object> entry : ofObject.entrySet()) {
+ try {
+ entry.setValue(new Object());
+ throw new AssertionError();
+ } catch (UnsupportedOperationException expected) {
+ }
+ }
+ }
+
+ private static void assertSame(Object expected, Object actual) {
+ if (expected != actual) {
+ throw new AssertionError("Expected <" + expected + "> but was <" + actual + ">");
+ }
+ }
+
+ private static void assertEquals(Object expected, Object actual) {
+ if (expected != actual && !expected.equals(actual)) {
+ throw new AssertionError("Expected <" + expected + "> but was <" + actual + ">");
+ }
+ }
+}
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 + ">");
+ }
+ }
+}
