tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
Log | Files | Refs | README | LICENSE

call-construct-hook.js (3281B)

      1 // Tests for invoking JSClass call/construct hooks.
      2 
      3 function testBasic() {
      4    let obj = {fun: newObjectWithCallHook()};
      5    for (var i = 0; i < 1000; i++) {
      6        let res = obj.fun(1, 2, 3);
      7        assertEq(res.this, obj);
      8        assertEq(res.callee, obj.fun);
      9        assertEq(JSON.stringify(res.arguments), "[1,2,3]");
     10        assertEq(res.newTarget, undefined);
     11 
     12        res = new obj.fun(1, 2, 3);
     13        assertEq(res.this, "<is_constructing>");
     14        assertEq(res.callee, obj.fun);
     15        assertEq(JSON.stringify(res.arguments), "[1,2,3]");
     16        assertEq(res.newTarget, obj.fun);
     17    }
     18 }
     19 testBasic();
     20 
     21 function testSpread() {
     22    let obj = {fun: newObjectWithCallHook()};
     23    for (var i = 0; i < 1000; i++) {
     24        let res = obj.fun(...[1, 2, 3]);
     25        assertEq(res.this, obj);
     26        assertEq(res.callee, obj.fun);
     27        assertEq(JSON.stringify(res.arguments), "[1,2,3]");
     28        assertEq(res.newTarget, undefined);
     29 
     30        res = new obj.fun(...[1, 2, 3]);
     31        assertEq(res.this, "<is_constructing>");
     32        assertEq(res.callee, obj.fun);
     33        assertEq(JSON.stringify(res.arguments), "[1,2,3]");
     34        assertEq(res.newTarget, obj.fun);
     35    }
     36 }
     37 testSpread();
     38 
     39 function testNewTarget() {
     40    let obj = newObjectWithCallHook();
     41    let newTargetVal = function() {};
     42    for (var i = 0; i < 1000; i++) {
     43        let res = Reflect.construct(obj, [], newTargetVal);
     44        assertEq(res.this, "<is_constructing>");
     45        assertEq(res.callee, obj);
     46        assertEq(res.arguments.length, 0);
     47        assertEq(res.newTarget, newTargetVal);
     48    }
     49 }
     50 testNewTarget();
     51 
     52 function testRealmSwitch() {
     53    // We currently switch to the callable's realm for class hook calls (similar to
     54    // JS function calls). This might change at some point, but for now assert the
     55    // returned object's realm matches that of the callee.
     56 
     57    let g = newGlobal({sameCompartmentAs: this});
     58    let obj = g.newObjectWithCallHook();
     59    assertEq(objectGlobal(obj), g);
     60 
     61    for (var i = 0; i < 1000; i++) {
     62        let res = obj(1, 2);
     63        assertEq(objectGlobal(res), g);
     64        assertEq(res.this, undefined);
     65        assertEq(res.callee, obj);
     66        assertEq(JSON.stringify(res.arguments), "[1,2]");
     67 
     68        res = new obj(1, 2);
     69        assertEq(objectGlobal(res), g);
     70        assertEq(res.this, "<is_constructing>");
     71        assertEq(res.callee, obj);
     72        assertEq(JSON.stringify(res.arguments), "[1,2]");
     73        assertEq(res.newTarget, obj);
     74    }
     75 }
     76 testRealmSwitch();
     77 
     78 function testCrossCompartmentWrapper() {
     79    // Call/construct hooks can be called through cross-compartment wrappers.
     80 
     81    let g = newGlobal({newCompartment: true});
     82    let obj = g.newObjectWithCallHook();
     83    assertEq(isProxy(obj), true); // It's a CCW.
     84 
     85    for (var i = 0; i < 1000; i++) {
     86        let res = obj(1, 2);
     87        assertEq(isProxy(res), true);
     88        assertEq(res.this, undefined);
     89        assertEq(res.callee, obj);
     90        assertEq(JSON.stringify(res.arguments), "[1,2]");
     91 
     92        res = new obj(1, 2);
     93        assertEq(isProxy(res), true);
     94        assertEq(res.this, "<is_constructing>");
     95        assertEq(res.callee, obj);
     96        assertEq(JSON.stringify(res.arguments), "[1,2]");
     97        assertEq(res.newTarget, obj);
     98    }
     99 }
    100 testCrossCompartmentWrapper();