Index: test/mjsunit/harmony/proxies-with-unscopables.js |
diff --git a/test/mjsunit/harmony/proxies-with-unscopables.js b/test/mjsunit/harmony/proxies-with-unscopables.js |
new file mode 100644 |
index 0000000000000000000000000000000000000000..d81d015d6298c4efc72eeca2cdf0232029cc37c2 |
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+++ b/test/mjsunit/harmony/proxies-with-unscopables.js |
@@ -0,0 +1,193 @@ |
+// Copyright 2014 the V8 project authors. All rights reserved. |
+// Use of this source code is governed by a BSD-style license that can be |
+// found in the LICENSE file. |
+ |
+// Flags: --harmony-unscopables |
+// Flags: --harmony-proxies |
+ |
+ |
+// TODO(arv): Once proxies can intercept symbols, add more tests. |
+ |
+ |
+function TestBasics() { |
+ var log = []; |
+ |
+ var proxy = Proxy.create({ |
+ getPropertyDescriptor: function(key) { |
+ log.push(key); |
+ if (key === 'x') { |
+ return { |
+ value: 1, |
+ configurable: true |
+ }; |
+ } |
+ return undefined; |
+ } |
+ }); |
+ |
+ var x = 'local'; |
+ |
+ with (proxy) { |
+ assertEquals(1, x); |
+ } |
+ |
+ // One 'x' for HasBinding and two for GetBindingValue |
+ assertEquals(['assertEquals', 'x', 'x', 'x'], log); |
+} |
+TestBasics(); |
+ |
+ |
+function TestInconsistent() { |
+ var log = []; |
+ var calls = 0; |
+ |
+ var proxy = Proxy.create({ |
+ getPropertyDescriptor: function(key) { |
+ log.push(key); |
+ if (key === 'x' && calls < 2) { |
+ calls++; |
+ return { |
+ value: 1, |
+ configurable: true |
+ }; |
+ } |
+ return undefined; |
+ } |
+ }); |
+ |
+ var x = 'local'; |
+ |
+ with (proxy) { |
+ assertEquals(void 0, x); |
+ } |
+ |
+ // One 'x' for HasBinding and two for GetBindingValue |
+ assertEquals(['assertEquals', 'x', 'x', 'x'], log); |
+} |
+TestInconsistent(); |
+ |
+ |
+function TestInconsistent2() { |
+ var log = []; |
+ var calls = 0; |
+ |
+ var proxy = Proxy.create({ |
+ getPropertyDescriptor: function(key) { |
+ log.push(key); |
+ if (key === 'x' && calls < 1) { |
+ calls++; |
+ return { |
+ value: 1, |
+ configurable: true |
+ }; |
+ } |
+ return undefined; |
+ } |
+ }); |
+ |
+ var x = 'local'; |
+ |
+ with (proxy) { |
+ assertEquals(void 0, x); |
+ } |
+ |
+ // One 'x' for HasBinding and one for GetBindingValue, the second one from |
+ // previous test is not called since the proxy reported that there is no 'x' |
+ // property when we did GetBindingValue. |
+ assertEquals(['assertEquals', 'x', 'x'], log); |
+} |
+TestInconsistent2(); |
+ |
+ |
+function TestUseProxyAsUnscopables() { |
+ var x = 1; |
+ var object = { |
+ x: 2 |
+ }; |
+ var calls = 0; |
+ var proxy = Proxy.create({ |
+ has: function(key) { |
+ calls++; |
+ assertEquals('x', key); |
+ return calls === 3; |
+ }, |
+ getPropertyDescriptor: function(key) { |
+ assertUnreachable(); |
+ } |
+ }); |
+ |
+ object[Symbol.unscopables] = proxy; |
+ |
+ with (object) { |
+ assertEquals(2, x); |
+ assertEquals(1, x); |
+ } |
+ |
+ // HasBinding, GetBindingValue, HasBinding |
+ assertEquals(3, calls); |
+} |
+TestUseProxyAsUnscopables(); |
+ |
+ |
+function TestThrowInHasOwnUnscopables() { |
+ var x = 1; |
+ var object = { |
+ x: 2 |
+ }; |
+ |
+ function CustomError() {} |
+ |
+ var calls = 0; |
+ var proxy = Proxy.create({ |
+ has: function(key) { |
+ if (calls++ === 0) { |
+ throw new CustomError(); |
+ } |
+ assertUnreachable(); |
+ }, |
+ getPropertyDescriptor: function(key) { |
+ assertUnreachable(); |
+ } |
+ }); |
+ |
+ object[Symbol.unscopables] = proxy; |
+ |
+ assertThrows(function() { |
+ with (object) { |
+ x; |
+ } |
+ }, CustomError); |
+} |
+TestThrowInHasOwnUnscopables(); |
+ |
+ |
+function TestThrowInHasOwnUnscopables2() { |
+ var x = 1; |
+ var object = { |
+ x: 2 |
+ }; |
+ |
+ function CustomError() {} |
+ |
+ var calls = 0; |
+ var proxy = Proxy.create({ |
+ has: function(key) { |
+ if (calls++ === 1) { |
+ throw new CustomError(); |
+ } |
+ return false; |
+ }, |
+ getPropertyDescriptor: function(key) { |
+ assertUnreachable(); |
+ } |
+ }); |
+ |
+ object[Symbol.unscopables] = proxy; |
+ |
+ assertThrows(function() { |
+ with (object) { |
+ x; |
+ } |
+ }, CustomError); |
+} |
+TestThrowInHasOwnUnscopables2(); |