Testing UICollectionView Delegate and cells

I am attempting to test the output of some of my functions that affect cell's inside a UICollectionView via the delegate, however after hours of trying to get it to play nice i have come across some baffling results

Setup

- (void)setUp
{
    [super setUp];
    // Put setup code here. This method is called before the invocation of each test method in the class.

    UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"MediaSelectionSuite" bundle:nil];
    chatGallery = [storyboard instantiateViewControllerWithIdentifier:@"Gallery"];
    [chatGallery performSelectorOnMainThread:@selector(loadView) withObject:nil waitUntilDone:YES];
    [chatGallery viewDidLoad];

    SUT = [[GalleryCollectionViewDelegate alloc]initForParent:chatGallery];
}

This passes - affecting the cell directly

- (void)testCollectionHighlightedCellisYellow
{
    //  Arrange
    [chatGallery assets][0] = [[GalleryAsset alloc]init];
    [[chatGallery thumbnailCollectionView] reloadData];
    UICollectionViewCell *cell = [SUT collectionView:[chatGallery thumbnailCollectionView] cellForItemAtIndexPath:[NSIndexPath indexPathForItem:0 inSection:0]];

    //  Act
    [SUT highlightCell:cell withColour:[UIColor yellowColor]];

    //  Assert
    XCTAssertEqual([UIColor yellowColor].CGColor, [cell.layer borderColor]);
}

This fails - affecting the cell via a generated NSIndexPath

- (void)testCollectionHighlightedCellisIndexZeroOne
{
    //  Arrange
    [chatGallery assets][0] = [[GalleryAsset alloc]init];
    [[chatGallery thumbnailCollectionView] reloadData];

    UICollectionViewCell *cell = [SUT collectionView:[chatGallery thumbnailCollectionView] cellForItemAtIndexPath:[NSIndexPath indexPathForItem:0 inSection:0]];

    //  Act
    [SUT highlightCellAtIndex:[[chatGallery thumbnailCollectionView] indexPathForCell:cell].item inCollection:[chatGallery thumbnailCollectionView] withColour:[UIColor yellowColor]];


    //  Assert
    XCTAssertEqual([UIColor yellowColor].CGColor, [cell.layer borderColor]);
}

Your first thought it probably well you are using a different function clearly the second function is the one at fault...well usually i would be inclined to agree, but the following test will show you why this maybe is not the case.

This Fails

- (void)testCellsAreEqual
{
    //  Arrange
    [chatGallery assets][0] = [[GalleryAsset alloc]init];
    [[chatGallery thumbnailCollectionView] reloadData];

    //  Act
    UICollectionViewCell *cellOne = [SUT collectionView:[chatGallery thumbnailCollectionView] cellForItemAtIndexPath:[NSIndexPath indexPathForItem:0 inSection:0]];
    UICollectionViewCell *cellTwo = [SUT collectionView:[chatGallery thumbnailCollectionView] cellForItemAtIndexPath:[NSIndexPath indexPathForItem:0 inSection:0]];


    //  Assert
    XCTAssertEqualObjects(cellOne,cellTwo );
}

This test was made after much debugging and seeing that for some reason the table cell produces two different cells for the same indexPath...Is this normal behaviour of dequeueReusableCellWithReuseIdentifier:forIndexPath:? or have i set the tests up wrong somehow?

Another interesting thing to note is that calling [[chatGallery thumbnailCollectionView]cellForItemAtIndexPath:[NSIndexPath indexPathForItem:0 inSection:0]]; will always seem to return nil even when the previously shown [SUT collectionView:[chatGallery thumbnailCollectionView] cellForItemAtIndexPath:[NSIndexPath indexPathForItem:0 inSection:0]]; produces something.

Can anyone explain what is going on?