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Test Info:

function testStrict(sb) {
"use strict";
Assert.equal(sb.eval("typeof wrappedCtor()"), "string");
Assert.equal(sb.eval("typeof new wrappedCtor()"), "object");
}
function run_test() {
var sb = new Cu.Sandbox(null);
var dateCtor = sb.Date;
sb.wrappedCtor = Cu.exportFunction(function wrapper(val) {
"use strict";
var constructing = this.constructor == wrapper;
return constructing ? new dateCtor(val) : dateCtor(val);
}, sb);
Assert.equal(typeof Date(), "string");
Assert.equal(typeof new Date(), "object");
Assert.equal(sb.eval("typeof wrappedCtor()"), "string");
Assert.equal(sb.eval("typeof new wrappedCtor()"), "object");
testStrict(sb);
}