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// Test that the caller and arguments objects are not available on native
// functions.

function testfn(f) { return [1].map(f)[0]; }
function foo() { return [].map.caller; }
assertEquals(null, testfn(foo));

// Try to delete the caller property (to make sure that we can't get to the
// caller accessor on the prototype.
delete Array.prototype.map.caller;
assertEquals(null, testfn(foo));

// Redo tests with arguments object.
function testarguments(f) { return [1].map(f)[0]; }
function bar() { return [].map.arguments; }
assertEquals(null, testfn(bar));

// Try to delete the arguments property (to make sure that we can't get to the
// caller accessor on the prototype.
delete Array.prototype.map.arguments;
assertEquals(null, testarguments(bar));