我需要用 Kiwi 测试一个 UICollectionViewFlowLayout 子类,
我已经正确地模拟了 UICollectionView 的委托和数据源,但我仍然遇到一些问题。
使用指定的项目大小CGSize(200.0f, 200.0f)
,我应该在屏幕上获得 5 个项目,但由于某种原因,最后一行返回的属性数组确实返回 10 个属性,这意味着有 10 个可见单元格。
这里会发生什么?如果我的布局按预期工作,屏幕上总是有 5 个元素:
这就是我到目前为止所拥有的(阅读评论),而且它大部分都有效。
describe(@"LineLayout", ^{
__block UICollectionView *collectionView;
__block HICollectionViewLineLayout *layout;
__block const CGRect windowFrame = CGRectMake(0.0f, 0.0f, 1024.0f, 768.0f);
__block const CGSize itemSize = CGSizeMake(200.0f, 200.0f);
// Create a Collection View that uses a LineLayout and set the datasource delegate
// before each test
beforeEach(^{
layout = [[HICollectionViewLineLayout alloc] init];
collectionView = [[UICollectionView alloc] initWithFrame:windowFrame collectionViewLayout:layout];
// Mock the UILineLayout data source
id delegateMock = [KWMock mockForProtocol:@protocol(UICollectionViewDelegateFlowLayout)];
[[delegateMock should] conformToProtocol:@protocol(UICollectionViewDelegateFlowLayout)];
[delegateMock stub:@selector(collectionView:layout:sizeForItemAtIndexPath:) andReturn:theValue(itemSize)];
[delegateMock stub:@selector(collectionView:layout:insetForItemAtIndex:) andReturn:theValue(UIEdgeInsetsZero)];
// Mock the UICollection View dataSource
id dataSourceMock = [KWMock mockForProtocol:@protocol(UICollectionViewDataSource)];
[[dataSourceMock should] conformToProtocol:@protocol(UICollectionViewDataSource)];
[dataSourceMock stub:@selector(numberOfSectionsInCollectionView:) andReturn:theValue(1)];
[dataSourceMock stub:@selector(collectionView:numberOfItemsInSection:) andReturn:theValue(10)];
// Set the delegate and the data source
collectionView.delegate = delegateMock;
collectionView.dataSource = dataSourceMock;
// Reload the collectionView Data
[collectionView reloadData];
});
it(@"Should properly identify central element when cell number is not even", ^{
NSArray *attributes = [layout layoutAttributesForElementsInRect:windowFrame];
// test that [attributes count] == 5
});
这是我在没有测试的情况下运行应用程序时看到的: