// ========================================================================== // Project: SproutCore - JavaScript Application Framework // Copyright: ©2006-2011 Apple Inc. and contributors. // License: Licensed under MIT license (see license.js) // ==========================================================================

/*global module test equals context ok same notest */

var source, indexes, observer, obj ; // base array to work with module(“SC.RangeObserver#update”, {

setup: function() {

  // create array with 5 SC.Object's in them
  source = [1,2,3,4,5].map(function(x) {
    return SC.Object.create({ item: x, foo: "bar" }) ;
  }, this); 

  indexes = SC.IndexSet.create(2,2); // select 2..3

  observer = SC.Object.create({

    callCount: 0, 

    rangeDidChange: function() { 
      this.callCount++;
    }

  });

  obj = SC.RangeObserver.create(source, indexes, observer, observer.rangeDidChange, "context", YES);

}

});

test(“returns receiver”, function() {

ok(obj === obj.update(source, SC.IndexSet.create()), 'should return receiver');

});

test(“switches to observing new range - no previous updated”, function() {

obj.update(source, SC.IndexSet.create(0));
observer.callCount = 0 ;

var len = source.length, idx;
for(idx=0;idx<len;idx++) source[idx].set('foo', 'baz');

// since new index set length is different use this as a proxy to verify
// that range changed
equals(observer.callCount, 1, 'range observer should fire on new range');

});

test(“switches to observing new range - previously updated”, function() {

var len = source.length, idx;
for(idx=0;idx<len;idx++) source[idx].set('foo', 'baz');
observer.callCount = 0 ;

obj.update(source, SC.IndexSet.create(0));
observer.callCount = 0 ;

for(idx=0;idx<len;idx++) source[idx].set('foo', 'bar');

// since new index set length is different use this as a proxy to verify
// that range changed
equals(observer.callCount, 1, 'range observer should fire on new range');

});