michael@0: /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: //-----------------------------------------------------------------------------
michael@0: var BUGNUMBER     = "(none)";
michael@0: var summary = "Basic support for accessing iterable objects using Iterator";
michael@0: var actual, expect;
michael@0: 
michael@0: printBugNumber(BUGNUMBER);
michael@0: printStatus(summary);
michael@0: 
michael@0: /**************
michael@0:  * BEGIN TEST *
michael@0:  **************/
michael@0: 
michael@0: var failed = false;
michael@0: 
michael@0: function Array_equals(a, b)
michael@0: {
michael@0:   if (!(a instanceof Array) || !(b instanceof Array))
michael@0:     throw new Error("Arguments not both of type Array");
michael@0:   if (a.length != b.length)
michael@0:     return false;
michael@0:   for (var i = 0, sz = a.length; i < sz; i++)
michael@0:     if (a[i] !== b[i])
michael@0:       return false;
michael@0:   return true;
michael@0: }
michael@0: 
michael@0: var iterable = { persistedProp: 17 };
michael@0: 
michael@0: try
michael@0: {
michael@0:   // nothing unusual so far -- verify basic properties
michael@0:   for (var i in iterable)
michael@0:   {
michael@0:     if (i != "persistedProp")
michael@0:       throw "no persistedProp!";
michael@0:     if (iterable[i] != 17)
michael@0:       throw "iterable[\"persistedProp\"] == 17";
michael@0:   }
michael@0: 
michael@0:   var keys = ["foo", "bar", "baz"];
michael@0:   var vals = [6, 5, 14];
michael@0: 
michael@0:   iterable.__iterator__ =
michael@0:     function(keysOnly)
michael@0:     {
michael@0:       var gen =
michael@0:       function()
michael@0:       {
michael@0: 	for (var i = 0; i < keys.length; i++)
michael@0: 	{
michael@0: 	  if (keysOnly)
michael@0: 	    yield keys[i];
michael@0: 	  else
michael@0: 	    yield [keys[i], vals[i]];
michael@0: 	}
michael@0:       };
michael@0:       return gen();
michael@0:     };
michael@0: 
michael@0:   /* Test [key, value] Iterator */
michael@0:   var index = 0;
michael@0:   var lastSeen = "INITIALVALUE";
michael@0:   var it = Iterator(iterable);
michael@0:   try
michael@0:   {
michael@0:     while (true)
michael@0:     {
michael@0:       var nextVal = it.next();
michael@0:       if (!Array_equals(nextVal, [keys[index], vals[index]]))
michael@0:         throw "Iterator(iterable): wrong next result\n" +
michael@0: 	  "  expected: " + [keys[index], vals[index]] + "\n" +
michael@0: 	  "  actual:   " + nextVal;
michael@0:       lastSeen = keys[index];
michael@0:       index++;
michael@0:     }
michael@0:   }
michael@0:   catch (e)
michael@0:   {
michael@0:     if (lastSeen !== keys[keys.length - 1])
michael@0:       throw "Iterator(iterable): not everything was iterated!\n" +
michael@0: 	"  last iterated was: " + lastSeen + "\n" +
michael@0: 	"  error: " + e;
michael@0:     if (e !== StopIteration)
michael@0:       throw "Iterator(iterable): missing or invalid StopIteration";
michael@0:   }
michael@0: 
michael@0:   if (iterable.persistedProp != 17)
michael@0:     throw "iterable.persistedProp not persisted!";
michael@0: 
michael@0:   /* Test [key, value] Iterator, called with an explicit |false| parameter */
michael@0:   var index = 0;
michael@0:   lastSeen = "INITIALVALUE";
michael@0:   it = Iterator(iterable, false);
michael@0:   try
michael@0:   {
michael@0:     while (true)
michael@0:     {
michael@0:       var nextVal = it.next();
michael@0:       if (!Array_equals(nextVal, [keys[index], vals[index]]))
michael@0:         throw "Iterator(iterable, false): wrong next result\n" +
michael@0: 	  "  expected: " + [keys[index], vals[index]] + "\n" +
michael@0: 	  "  actual:   " + nextVal;
michael@0:       lastSeen = keys[index];
michael@0:       index++;
michael@0:     }
michael@0:   }
michael@0:   catch (e)
michael@0:   {
michael@0:     if (lastSeen !== keys[keys.length - 1])
michael@0:       throw "Iterator(iterable, false): not everything was iterated!\n" +
michael@0: 	"  last iterated was: " + lastSeen + "\n" +
michael@0: 	"  error: " + e;
michael@0:     if (e !== StopIteration)
michael@0:       throw "Iterator(iterable, false): missing or invalid StopIteration";
michael@0:   }
michael@0: 
michael@0:   if (iterable.persistedProp != 17)
michael@0:     throw "iterable.persistedProp not persisted!";
michael@0: 
michael@0:   /* Test key-only Iterator */
michael@0:   index = 0;
michael@0:   lastSeen = undefined;
michael@0:   it = Iterator(iterable, true);
michael@0:   try
michael@0:   {
michael@0:     while (true)
michael@0:     {
michael@0:       var nextVal = it.next();
michael@0:       if (nextVal !== keys[index])
michael@0:         throw "Iterator(iterable, true): wrong next result\n" +
michael@0: 	  "  expected: " + keys[index] + "\n" +
michael@0: 	  "  actual:   " + nextVal;
michael@0:       lastSeen = keys[index];
michael@0:       index++;
michael@0:     }
michael@0:   }
michael@0:   catch (e)
michael@0:   {
michael@0:     if (lastSeen !== keys[keys.length - 1])
michael@0:       throw "Iterator(iterable, true): not everything was iterated!\n" +
michael@0: 	"  last iterated was: " + lastSeen + "\n" +
michael@0: 	"  error: " + e;
michael@0:     if (e !== StopIteration)
michael@0:       throw "Iterator(iterable, true): missing or invalid StopIteration";
michael@0:   }
michael@0: 
michael@0:   if (iterable.persistedProp != 17)
michael@0:     throw "iterable.persistedProp not persisted!";
michael@0: }
michael@0: catch (e)
michael@0: {
michael@0:   failed = e;
michael@0: }
michael@0: 
michael@0: 
michael@0: 
michael@0: expect = false;
michael@0: actual = failed;
michael@0: 
michael@0: reportCompare(expect, actual, summary);