kishikawakatsumi · kishikawakatsumi · Dec 29, 2019
diff --git a/IBPCollectionViewCompositionalLayout.xcodeproj/project.pbxproj b/IBPCollectionViewCompositionalLayout.xcodeproj/project.pbxproj
@@ -67,11 +67,10 @@
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@@ -589,9 +585,9 @@
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 				14B9585323B8DE3A00DF3B7F /* ListViewTests.swift in Sources */,
 				14B9585E23B8E21000DF3B7F /* DiffableDataSourceInteroperability.swift in Sources */,
+				1477B43823B9182000373474 /* GridViewTests.swift in Sources */,
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diff --git a/Tests/IBPCollectionViewCompositionalLayoutTests/Assets.xcassets/Contents.json b/Tests/IBPCollectionViewCompositionalLayoutTests/Assets.xcassets/Contents.json
diff --git a/...ollectionViewCompositionalLayoutTests/Assets.xcassets/chevron.left.imageset/Contents.json b/...ollectionViewCompositionalLayoutTests/Assets.xcassets/chevron.left.imageset/Contents.json
diff --git a/...ectionViewCompositionalLayoutTests/Assets.xcassets/chevron.left.imageset/chevron.left.pdf b/...ectionViewCompositionalLayoutTests/Assets.xcassets/chevron.left.imageset/chevron.left.pdf
diff --git a/...llectionViewCompositionalLayoutTests/Assets.xcassets/chevron.right.imageset/Contents.json b/...llectionViewCompositionalLayoutTests/Assets.xcassets/chevron.right.imageset/Contents.json
diff --git a/...tionViewCompositionalLayoutTests/Assets.xcassets/chevron.right.imageset/chevron.right.pdf b/...tionViewCompositionalLayoutTests/Assets.xcassets/chevron.right.imageset/chevron.right.pdf
diff --git a/Tests/IBPCollectionViewCompositionalLayoutTests/GridViewTests.swift b/Tests/IBPCollectionViewCompositionalLayoutTests/GridViewTests.swift
@@ -0,0 +1,189 @@
+import XCTest
+import IBPCollectionViewCompositionalLayout
+
+class GridViewTests: XCTestCase {
+    func testViewController() {
+        let viewController = GridViewController()
+
+        let window = UIWindow(frame: UIScreen.main.bounds)
+        window.rootViewController = viewController
+        window.makeKeyAndVisible()
+
+        RunLoop.main.run(until: Date(timeIntervalSinceNow: 0))
+
+        let collectionView = viewController.collectionView!
+        let fractionalWidth: CGFloat = 0.2
+        let numberOfColumns: CGFloat = floor(1 / fractionalWidth)
+        let width: CGFloat = window.bounds.width * fractionalWidth
+        let height = width
+        let numberOfItems = collectionView.numberOfItems(inSection: 0)
+
+        if #available(iOS 11.0, *) {
+            let safeAreaInsets = viewController.view.safeAreaInsets
+
+            XCTAssertEqual(collectionView.adjustedContentInset, safeAreaInsets)
+            XCTAssertEqual(collectionView.contentOffset, CGPoint(x: -safeAreaInsets.left, y: -safeAreaInsets.top))
+            XCTAssertEqual(collectionView.contentSize, CGSize(width: window.bounds.width, height: ceil(CGFloat(numberOfItems) / numberOfColumns) * window.bounds.width * fractionalWidth))
+
+            for case (let index, let cell as UICollectionViewCell) in collectionView.subviews.enumerated() {
+                XCTAssertEqual(cell.frame, CGRect(x: width * (CGFloat(index).truncatingRemainder(dividingBy: numberOfColumns)), y: height * floor(CGFloat(index) / numberOfColumns), width: width, height: height))
+            }
+        } else {
+
+        }
+    }
+
+    func testNavigationController() {
+        let viewController = GridViewController()
+
+        let window = UIWindow(frame: UIScreen.main.bounds)
+        let navigationController = UINavigationController(rootViewController: viewController)
+        window.rootViewController = navigationController
+        window.makeKeyAndVisible()
+
+        RunLoop.main.run(until: Date(timeIntervalSinceNow: 0))
+
+        let collectionView = viewController.collectionView!
+        let fractionalWidth: CGFloat = 0.2
+        let numberOfColumns: CGFloat = floor(1 / fractionalWidth)
+        let width: CGFloat = window.bounds.width * fractionalWidth
+        let height = width
+        let numberOfItems = collectionView.numberOfItems(inSection: 0)
+
+        if #available(iOS 11.0, *) {
+            let safeAreaInsets = viewController.view.safeAreaInsets
+
+            XCTAssertEqual(collectionView.adjustedContentInset, safeAreaInsets)
+            XCTAssertEqual(collectionView.contentOffset, CGPoint(x: -safeAreaInsets.left, y: -safeAreaInsets.top))
+            XCTAssertEqual(collectionView.contentSize, CGSize(width: window.bounds.width, height: ceil(CGFloat(numberOfItems) / numberOfColumns) * window.bounds.width * fractionalWidth))
+
+            for case (let index, let cell as UICollectionViewCell) in collectionView.subviews.enumerated() {
+                XCTAssertEqual(cell.frame, CGRect(x: width * (CGFloat(index).truncatingRemainder(dividingBy: numberOfColumns)), y: height * floor(CGFloat(index) / numberOfColumns), width: width, height: height))
+            }
+        } else {
+
+        }
+    }
+
+    func testTabBarController() {
+        let viewController = GridViewController()
+
+        let window = UIWindow(frame: UIScreen.main.bounds)
+        let tabBarController = UITabBarController()
+        tabBarController.viewControllers = [viewController]
+        window.rootViewController = tabBarController
+        window.makeKeyAndVisible()
+
+        RunLoop.main.run(until: Date(timeIntervalSinceNow: 0))
+
+        let collectionView = viewController.collectionView!
+        let fractionalWidth: CGFloat = 0.2
+        let numberOfColumns: CGFloat = floor(1 / fractionalWidth)
+        let width: CGFloat = window.bounds.width * fractionalWidth
+        let height = width
+        let numberOfItems = collectionView.numberOfItems(inSection: 0)
+
+        if #available(iOS 11.0, *) {
+            let safeAreaInsets = viewController.view.safeAreaInsets
+
+            XCTAssertEqual(collectionView.adjustedContentInset, safeAreaInsets)
+            XCTAssertEqual(collectionView.contentOffset, CGPoint(x: -safeAreaInsets.left, y: -safeAreaInsets.top))
+            XCTAssertEqual(collectionView.contentSize, CGSize(width: window.bounds.width, height: ceil(CGFloat(numberOfItems) / numberOfColumns) * window.bounds.width * fractionalWidth))
+
+            for case (let index, let cell as UICollectionViewCell) in collectionView.subviews.enumerated() {
+                XCTAssertEqual(cell.frame, CGRect(x: width * (CGFloat(index).truncatingRemainder(dividingBy: numberOfColumns)), y: height * floor(CGFloat(index) / numberOfColumns), width: width, height: height))
+            }
+        } else {
+
+        }
+    }
+
+    func testNavigationControllerInTabBarController() {
+        let viewController = GridViewController()
+
+        let window = UIWindow(frame: UIScreen.main.bounds)
+        let navigationController = UINavigationController(rootViewController: viewController)
+        let tabBarController = UITabBarController()
+        tabBarController.viewControllers = [navigationController]
+        window.rootViewController = tabBarController
+        window.makeKeyAndVisible()
+
+        RunLoop.main.run(until: Date(timeIntervalSinceNow: 0))
+
+        let collectionView = viewController.collectionView!
+        let fractionalWidth: CGFloat = 0.2
+        let numberOfColumns: CGFloat = floor(1 / fractionalWidth)
+        let width: CGFloat = window.bounds.width * fractionalWidth
+        let height = width
+        let numberOfItems = collectionView.numberOfItems(inSection: 0)
+
+        if #available(iOS 11.0, *) {
+            let safeAreaInsets = viewController.view.safeAreaInsets
+
+            XCTAssertEqual(collectionView.adjustedContentInset, safeAreaInsets)
+            XCTAssertEqual(collectionView.contentOffset, CGPoint(x: -safeAreaInsets.left, y: -safeAreaInsets.top))
+            XCTAssertEqual(collectionView.contentSize, CGSize(width: window.bounds.width, height: ceil(CGFloat(numberOfItems) / numberOfColumns) * window.bounds.width * fractionalWidth))
+
+            for case (let index, let cell as UICollectionViewCell) in collectionView.subviews.enumerated() {
+                XCTAssertEqual(cell.frame, CGRect(x: width * (CGFloat(index).truncatingRemainder(dividingBy: numberOfColumns)), y: height * floor(CGFloat(index) / numberOfColumns), width: width, height: height))
+            }
+        } else {
+
+        }
+    }
+}
+
+class GridViewController: UIViewController {
+    enum Section {
+        case main
+    }
+
+    var dataSource: UICollectionViewDiffableDataSource<Section, Int>! = nil
+    var collectionView: UICollectionView! = nil
+
+    override func viewDidLoad() {
+        super.viewDidLoad()
+        navigationItem.title = "Grid"
+        configureHierarchy()
+        configureDataSource()
+    }
+}
+
+extension GridViewController {
+    private func createLayout() -> UICollectionViewLayout {
+        let itemSize = NSCollectionLayoutSize(widthDimension: .fractionalWidth(0.2), heightDimension: .fractionalHeight(1))
+        let item = NSCollectionLayoutItem(layoutSize: itemSize)
+
+        let groupSize = NSCollectionLayoutSize(widthDimension: .fractionalWidth(1), heightDimension: .fractionalWidth(0.2))
+        let group = NSCollectionLayoutGroup.horizontal(layoutSize: groupSize, subitems: [item])
+
+        let section = NSCollectionLayoutSection(group: group)
+
+        let layout = UICollectionViewCompositionalLayout(section: section)
+        return layout
+    }
+}
+
+extension GridViewController {
+    private func configureHierarchy() {
+        collectionView = UICollectionView(frame: view.bounds, collectionViewLayout: createLayout())
+        collectionView.autoresizingMask = [.flexibleWidth, .flexibleHeight]
+        collectionView.register(UICollectionViewCell.self, forCellWithReuseIdentifier: String(describing: UICollectionViewCell.self))
+        view.addSubview(collectionView)
+    }
+
+    private func configureDataSource() {
+        dataSource = UICollectionViewDiffableDataSource<Section, Int>(collectionView: collectionView) { (collectionView, indexPath, identifier) in
+            let cell = collectionView.dequeueReusableCell(withReuseIdentifier: String(describing: UICollectionViewCell.self), for: indexPath)
+            cell.contentView.backgroundColor = .white
+            cell.contentView.layer.borderWidth = 1
+            cell.contentView.layer.borderColor = UIColor.black.withAlphaComponent(0.5).cgColor
+            return cell
+        }
+
+        var snapshot = NSDiffableDataSourceSnapshot<Section, Int>()
+        snapshot.appendSections([.main])
+        snapshot.appendItems(Array(0..<94))
+        dataSource.apply(snapshot, animatingDifferences: false)
+    }
+}