Drew Olbrich
93 lines
3.2 KiB
Swift
93 lines
3.2 KiB
Swift
//
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// CodeTests.swift
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// ScrollingContentViewControllerTests
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//
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// Created by Drew Olbrich on 1/19/19.
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// Copyright 2019 Oath Inc.
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//
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// Licensed under the terms of the MIT License. See the file LICENSE for the full terms.
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//
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import XCTest
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import ScrollingContentViewController
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/// Test case of using `ScrollingContentViewController` in code.
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class CodeTests: XCTestCase {
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var window: UIWindow!
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var scrollingContentViewController: ScrollingContentViewController!
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var contentView: ContentView!
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var scrollView: UIScrollView!
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var rootView: UIView!
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override func setUp() {
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window = UIWindow(frame: UIScreen.main.bounds)
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window.isHidden = false
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scrollingContentViewController = ScrollingContentViewController()
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contentView = ContentView()
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scrollingContentViewController.contentView = contentView
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scrollingContentViewController.beginAppearanceTransition(true, animated: false)
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window.rootViewController = scrollingContentViewController
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scrollingContentViewController.view.layoutIfNeeded()
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scrollingContentViewController.endAppearanceTransition()
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scrollView = scrollingContentViewController.scrollView
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rootView = scrollingContentViewController.view
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}
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override func tearDown() {
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scrollingContentViewController.beginAppearanceTransition(false, animated: false)
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window.rootViewController = nil
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scrollingContentViewController.endAppearanceTransition()
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window.isHidden = true
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window = nil
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scrollingContentViewController = nil
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scrollView = nil
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rootView = nil
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contentView = nil
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}
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/// Tests that the view hierarchy has the expected topology.
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func testViewHierarchy() {
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// The content view's superview should be the scroll view.
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XCTAssertEqual(contentView.superview, scrollView)
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// The scroll view's superview should be the view controller's root view.
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XCTAssertEqual(scrollView.superview, rootView)
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}
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/// Tests that the content view and the scroll view have the expected size.
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func testDefaultLayout() {
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let rootViewSafeAreaSize = rootView.bounds.inset(by: rootView.safeAreaInsets).size
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// The content view's frame should match the size of the root view's safe area.
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XCTAssertEqual(contentView.frame.size, rootViewSafeAreaSize)
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// The scroll view's content size should match that of the root view's safe area.
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XCTAssertEqual(scrollView.contentSize, rootViewSafeAreaSize)
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}
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/// Tests that the size of the content view is the expected size for the case of a
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/// view that's taller than root view's safe area.
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func testExpandedLayout() {
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contentView.heightConstraint.constant = 2000
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scrollView.setNeedsLayout()
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scrollView.layoutIfNeeded()
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// The content view should stretch to larger than the root view's safe area.
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XCTAssertEqual(contentView.frame.size.height, contentView.heightConstraint.constant)
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// The scroll view's content size height should match that of the content view.
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XCTAssertEqual(scrollView.contentSize.height, contentView.heightConstraint.constant)
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}
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}
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