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Bug 975042 - Tests. r=peterv

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We try to make this test machinery reusable for future Xrayable JS objects.
This commit is contained in:
Bobby Holley 2014-03-23 11:02:14 -03:00
parent 03d7299cd4
commit a8f19c6cea
1 changed files with 54 additions and 1 deletions
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55
js/xpconnect/tests/chrome/test_xrayToJS.xul
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@ -32,7 +32,7 @@ https://bugzilla.mozilla.org/show_bug.cgi?id=933681
'WeakMap', 'Map', 'Set'];
function go() {
var iwin = document.getElementById('ifr').contentWindow;
window.iwin = document.getElementById('ifr').contentWindow;
// Test constructors that can be instantiated with zero arguments.
for (var c of simpleConstructors) {
@ -101,6 +101,8 @@ https://bugzilla.mozilla.org/show_bug.cgi?id=933681
is(iwin.eval(toEval).b.foo, 'bar', "eval-ed object looks right");
is(iwin.eval(toEval).f(), iwin, "evaled function works right");
testDate();
// We could also test DataView and Iterator here for completeness, but it's
// more trouble than it's worth.
@ -108,8 +110,59 @@ https://bugzilla.mozilla.org/show_bug.cgi?id=933681
SimpleTest.finish();
}
function filterOut(array, props) {
return array.filter(p => props.indexOf(p) == -1);
}
function testXray(classname, xray, xray2, propsToSkip) {
propsToSkip = propsToSkip || [];
let xrayProto = Object.getPrototypeOf(xray);
let localProto = window[classname].prototype;
let protoProps = filterOut(Object.getOwnPropertyNames(localProto), propsToSkip).sort();
let protoMethods = protoProps.filter(name => typeof localProto[name] == 'function' &&
name != 'constructor');
ok(protoMethods.length > 0, "Need something to test");
is(xrayProto, iwin[classname].prototype, "Xray proto is correct");
is(xrayProto, xray.__proto__, "Proto accessors agree");
is(Object.getPrototypeOf(xrayProto), iwin.Object.prototype, "proto proto is correct");
for (let name of protoMethods) {
info("Running tests for property: " + name);
ok(xrayProto.hasOwnProperty(name), "proto should have the property as own");
ok(!xray.hasOwnProperty(name), "instance should not have the property as own");
let method = xrayProto[name];
is(typeof method, 'function', "Methods from Xrays are functions");
is(global(method), window, "Methods from Xrays are local");
ok(method instanceof Function, "instanceof works on methods from Xrays");
is(xrayProto[name], method, "Holder caching works properly");
is(xray[name], method, "Proto props resolve on the instance");
let local = localProto[name];
is(method.length, local.length, "Function.length identical");
if (method.length == 0) {
is(xray[name]() + "", local.call(xray) + "",
"Xray and local method results stringify identically");
is(xray[name]() + "", xray.wrappedJSObject[name]() + "",
"Xray and waived method results stringify identically");
}
}
is(Object.getOwnPropertyNames(xrayProto).sort().toSource(),
protoProps.toSource(), "getOwnPropertyNames works");
is(xrayProto.constructor, iwin[classname], "constructor property works");
xrayProto.expando = 42;
is(xray.expando, 42, "Xrayed instances see proto expandos");
is(xray2.expando, 42, "Xrayed instances see proto expandos");
}
function testDate() {
// toGMTString is handled oddly in the engine. We don't bother to support
// it over Xrays.
//
// We don't yet support self-hosted functions on Xrays. See bug 972987.
let propsToSkip = ['toGMTString', 'toLocaleString',
'toLocaleDateString', 'toLocaleTimeString'];
testXray('Date', new iwin.Date(), new iwin.Date(), propsToSkip);
}
]]>
</script>