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-rw-r--r--js/src/tests/ecma_6/Object/propertyIsEnumerable-proxy.js59
1 files changed, 59 insertions, 0 deletions
diff --git a/js/src/tests/ecma_6/Object/propertyIsEnumerable-proxy.js b/js/src/tests/ecma_6/Object/propertyIsEnumerable-proxy.js
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index 000000000..a1dda90e0
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+++ b/js/src/tests/ecma_6/Object/propertyIsEnumerable-proxy.js
@@ -0,0 +1,59 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+function logProxy(object) {
+ var log = [];
+ var handler = {
+ getOwnPropertyDescriptor(target, propertyKey) {
+ log.push(propertyKey);
+ return Object.getOwnPropertyDescriptor(target, propertyKey);
+ }
+ };
+ var proxy = new Proxy(object, new Proxy(handler, {
+ get(target, propertyKey, receiver) {
+ if (!(propertyKey in target)) {
+ throw new Error(`Unexpected call to trap: "${propertyKey}"`);
+ }
+ return target[propertyKey];
+ }
+ }));
+ return {proxy, log};
+}
+
+var properties = ["string-property"];
+if (typeof Symbol === 'function')
+ properties.push(Symbol("symbol-property"));
+
+for (var property of properties) {
+ // Test 1: property is not present on object
+ var {proxy, log} = logProxy({});
+ var result = Object.prototype.propertyIsEnumerable.call(proxy, property);
+ assertEq(result, false);
+ assertDeepEq(log, [property]);
+
+ // Test 2: property is present on object and enumerable
+ var {proxy, log} = logProxy({[property]: 0});
+ var result = Object.prototype.propertyIsEnumerable.call(proxy, property);
+ assertEq(result, true);
+ assertDeepEq(log, [property]);
+
+ // Test 3: property is present on object, but not enumerable
+ var {proxy, log} = logProxy(Object.defineProperty({[property]: 0}, property, {enumerable: false}));
+ var result = Object.prototype.propertyIsEnumerable.call(proxy, property);
+ assertEq(result, false);
+ assertDeepEq(log, [property]);
+
+ // Test 4: property is present on prototype object
+ var {proxy, log} = logProxy(Object.create({[property]: 0}));
+ var result = Object.prototype.propertyIsEnumerable.call(proxy, property);
+ assertEq(result, false);
+ assertDeepEq(log, [property]);
+
+ // Test 5: property is present on prototype object, prototype is proxy object
+ var {proxy, log} = logProxy({[property]: 0});
+ var result = Object.prototype.propertyIsEnumerable.call(Object.create(proxy), property);
+ assertEq(result, false);
+ assertDeepEq(log, []);
+}
+
+reportCompare(0, 0);