objects.js - mozsearch

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// This file was written by Andy Wingo <wingo@igalia.com> and originally

// contributed to V8 as generators-objects.js, available here:

//

// http://code.google.com/p/v8/source/browse/branches/bleeding_edge/test/mjsunit/harmony/generators-objects.js

// Test aspects of the generator runtime.

// Test the properties and prototype of a generator object.

function TestGeneratorObject() {

  function* g() { yield 1; }

  var iter = g();

  assertEq(Object.getPrototypeOf(iter), g.prototype);

  assertTrue(iter instanceof g);

  assertEq(String(iter), "[object Generator]");

  assertDeepEq(Object.getOwnPropertyNames(iter), []);

  assertNotEq(g(), iter);

TestGeneratorObject();

// Test the methods of generator objects.

function TestGeneratorObjectMethods() {

  function* g() { yield 1; }

  var iter = g();

  assertEq(iter.next.length, 1);

  assertEq(iter.return.length, 1);

  assertEq(iter.throw.length, 1);

  function TestNonGenerator(non_generator) {

    assertThrowsInstanceOf(function() { iter.next.call(non_generator); }, TypeError);

    assertThrowsInstanceOf(function() { iter.next.call(non_generator, 1); }, TypeError);

    assertThrowsInstanceOf(function() { iter.return.call(non_generator, 1); }, TypeError);

    assertThrowsInstanceOf(function() { iter.throw.call(non_generator, 1); }, TypeError);

    assertThrowsInstanceOf(function() { iter.close.call(non_generator); }, TypeError);

  TestNonGenerator(1);

  TestNonGenerator({});

  TestNonGenerator(function(){});

  TestNonGenerator(g);

  TestNonGenerator(g.prototype);

TestGeneratorObjectMethods();

if (typeof reportCompare == "function")

    reportCompare(true, true);