Index: test/codegen/corelib/hashcode_test.dart |
diff --git a/test/codegen/corelib/hashcode_test.dart b/test/codegen/corelib/hashcode_test.dart |
new file mode 100644 |
index 0000000000000000000000000000000000000000..41a272f6de8537253fe3567266edad68c0d5c474 |
--- /dev/null |
+++ b/test/codegen/corelib/hashcode_test.dart |
@@ -0,0 +1,48 @@ |
+// Copyright (c) 2013, the Dart 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. |
+ |
+import "package:expect/expect.dart"; |
+ |
+class Override { |
+ int hash; |
+ int get superHash => super.hashCode; |
+ int get hashCode => hash; |
+ |
+ int foo() => hash; // Just some function that can be closurized. |
+ |
+ bool operator==(Object other) => |
+ other is Override && (other as Override).hash == hash; |
+} |
+ |
+int bar() => 42; // Some global function. |
+ |
+main() { |
+ var o = new Object(); |
+ var hash = o.hashCode; |
+ // Doesn't change. |
+ Expect.equals(hash, o.hashCode); |
+ Expect.equals(hash, identityHashCode(o)); |
+ |
+ var c = new Override(); |
+ int identityHash = c.superHash; |
+ hash = (identityHash == 42) ? 37 : 42; |
+ c.hash = hash; |
+ Expect.equals(hash, c.hashCode); |
+ Expect.equals(identityHash, identityHashCode(c)); |
+ |
+ // These classes don't override hashCode. |
+ var samples = [0, 0x10000000, 1.5, -0, null, true, false, const Object()]; |
+ for (var v in samples) { |
+ print(v); |
+ Expect.equals(v.hashCode, identityHashCode(v)); |
+ } |
+ // These do, or might do, but we can still use hashCodeOf and get the same |
+ // result each time. |
+ samples = ["string", "", (x) => 42, c.foo, bar]; |
+ for (var v in samples) { |
+ print(v); |
+ Expect.equals(v.hashCode, v.hashCode); |
+ Expect.equals(identityHashCode(v), identityHashCode(v)); |
+ } |
+} |