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diff --git a/dom/tests/mochitest/bugs/test_instanceof_error_message.html b/dom/tests/mochitest/bugs/test_instanceof_error_message.html new file mode 100644 index 0000000000..05dfa602f7 --- /dev/null +++ b/dom/tests/mochitest/bugs/test_instanceof_error_message.html @@ -0,0 +1,111 @@ +<!DOCTYPE HTML> +<html> +<!-- +https://bugzilla.mozilla.org/show_bug.cgi?id=1530413 +--> +<head> + <meta charset="utf-8"> + <title>Test for Bug 1530413</title> + <script src="/tests/SimpleTest/SimpleTest.js"></script> + <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/> + <script type="application/javascript"> + add_task(() => { + var Cu = SpecialPowers.Cu; + try { + // Test case 1 + ({} instanceof {}); + ok(false, "Should throw a type error"); + } catch (e) { + is(e.message, "({}) is not a function", "We should get a correct error message when calling instanceof"); + } + // Test case 2 + try { + ({} instanceof document); + ok(false, "Should throw a type error"); + } catch (e) { + is(e.message, "document is not a function", "We should get a correct error message when calling instanceof"); + } + // Test case 3 + try { + ({} instanceof new Proxy(document, {})); + ok(false, "Should throw a type error"); + } catch (e) { + is(e.message, "(new Proxy(...)) is not a function", "We should get a correct error message when calling instanceof"); + } + // Test case 4 - Verify invoking instanceof on an object from a different compartment yields the same error + var sandbox = SpecialPowers.unwrap(Cu.Sandbox(this, { sameZoneAs: this, freshCompartment: true, wantXrays: false })); + sandbox.window = window; + sandbox.crossCompartmentObject = {}; // object created in the test compartment + try { + Cu.evalInSandbox("({} instanceof window);", sandbox); + ok(false, "Should throw a type error"); + } catch (e) { + is(e.message, "window is not a function", "We should get a correct error message when calling instanceof"); + } + + // Test case 5 - Verify we get the same error when the LHS is an object created in a different compartment + try { + Cu.evalInSandbox("(crossCompartmentObject instanceof window);", sandbox); + ok(false, "Should throw a type error"); + } catch (e) { + is(e.message, "window is not a function", "We should get a correct error message when calling instanceof"); + } + + // Test case 6 - Test that we are correctly wrapping the window into sandbox's compartment + window[Symbol.hasInstance] = function(instance) { + instance.window = this; + return true; + } + var x = Cu.evalInSandbox("(crossCompartmentObject instanceof window);", sandbox); + ok(x, "Symbol.hasInstance for window should return true"); + is(sandbox.crossCompartmentObject.window, window, "We shouldn't leak the window"); + delete window[Symbol.hasInstance]; + Cu.nukeSandbox(sandbox); + + // Test case 7 - Test instanceof with RHS being a same-origin Xray to a Window + sandbox = SpecialPowers.unwrap(Cu.Sandbox(this, { sameZoneAs: this, freshCompartment: true})); + sandbox.window = window; + sandbox.crossCompartmentObject = {}; + + window[Symbol.hasInstance] = function(instance) { + instance.window = this; + return true; + } + try { + Cu.evalInSandbox("(crossCompartmentObject instanceof window);", sandbox); + ok(false, "Should throw a type error"); + } catch (e) { + is(e.message, "window is not a function", + "We should get a correct error thrown when the RHS of instanceof is an Xray to a Window."); + } + delete window[Symbol.hasInstance]; + Cu.nukeSandbox(sandbox); + + // Test case 8 - Test instanceof with RHS being a same-origin Xray waiver + sandbox = SpecialPowers.unwrap(Cu.Sandbox(this, { sameZoneAs: this, freshCompartment: true})); + sandbox.window = window; + sandbox.crossCompartmentObject = {}; + sandbox.waiveXrays = SpecialPowers.wrapFor(Cu.waiveXrays, sandbox); + + window[Symbol.hasInstance] = function(instance) { + instance.window = this; + return true; + } + Cu.evalInSandbox("(crossCompartmentObject instanceof waiveXrays(window));", sandbox); + ok(x, "Symbol.hasInstance for window should return true"); + is(sandbox.crossCompartmentObject.window, window, + "The window pointed to by the crossCompartmentObject should be the same as the window in our compartment"); + delete window[Symbol.hasInstance]; + Cu.nukeSandbox(sandbox); + }); + </script> +</head> +<body> +<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1530413">Mozilla Bug 1530413</a> +<p id="display"></p> +<div id="content" style="display: none"> +</div> +<pre id="test"> +</pre> +</body> +</html>
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