| // META: global=window,dedicatedworker,jsshell |
| |
| "use strict"; |
| // https://webidl.spec.whatwg.org/#es-namespaces |
| // https://webassembly.github.io/spec/js-api/#namespacedef-webassembly |
| |
| test(() => { |
| assert_own_property(WebAssembly, Symbol.toStringTag); |
| |
| const propDesc = Object.getOwnPropertyDescriptor(WebAssembly, Symbol.toStringTag); |
| assert_equals(propDesc.value, "WebAssembly", "value"); |
| assert_equals(propDesc.writable, false, "writable"); |
| assert_equals(propDesc.enumerable, false, "enumerable"); |
| assert_equals(propDesc.configurable, true, "configurable"); |
| }, "@@toStringTag exists on the namespace object with the appropriate descriptor"); |
| |
| test(() => { |
| assert_equals(WebAssembly.toString(), "[object WebAssembly]"); |
| assert_equals(Object.prototype.toString.call(WebAssembly), "[object WebAssembly]"); |
| }, "Object.prototype.toString applied to the namespace object"); |
| |
| test(t => { |
| assert_own_property(WebAssembly, Symbol.toStringTag, "Precondition: @@toStringTag on the namespace object"); |
| t.add_cleanup(() => { |
| Object.defineProperty(WebAssembly, Symbol.toStringTag, { value: "WebAssembly" }); |
| }); |
| |
| Object.defineProperty(WebAssembly, Symbol.toStringTag, { value: "Test" }); |
| assert_equals(WebAssembly.toString(), "[object Test]"); |
| assert_equals(Object.prototype.toString.call(WebAssembly), "[object Test]"); |
| }, "Object.prototype.toString applied after modifying the namespace object's @@toStringTag"); |
| |
| test(t => { |
| assert_own_property(WebAssembly, Symbol.toStringTag, "Precondition: @@toStringTag on the namespace object"); |
| t.add_cleanup(() => { |
| Object.defineProperty(WebAssembly, Symbol.toStringTag, { value: "WebAssembly" }); |
| }); |
| |
| assert_true(delete WebAssembly[Symbol.toStringTag]); |
| assert_equals(WebAssembly.toString(), "[object Object]"); |
| assert_equals(Object.prototype.toString.call(WebAssembly), "[object Object]"); |
| }, "Object.prototype.toString applied after deleting @@toStringTag"); |