80 lines
2.8 KiB
Objective-C
80 lines
2.8 KiB
Objective-C
// Copyright 2004-present Facebook. All Rights Reserved.
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#import <UIKit/UIKit.h>
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#import <XCTest/XCTest.h>
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#import <OCMock/OCMock.h>
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@interface LayoutSubviewsOrderingTest : XCTestCase
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@end
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@implementation LayoutSubviewsOrderingTest
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/**
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* This test exists to insure that didLayoutSubviews is always called immediately after layoutSubviews for a VC:View
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* pair. In Catalyst we have multiple levels of ViewController containment, and we rely on this ordering
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* to insure that layoutGuides are set on RKViewControllers before Views further down in the heirarchy have
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* their layoutSubviews called (and need to use the aforementioned layoutGuides)
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*/
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- (void)testLayoutSubviewsOrdering
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{
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// create some Views and ViewControllers
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UIViewController *parentVC = [[UIViewController alloc] init];
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UIView *parentView = [[UIView alloc] init];
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UIViewController *childVC = [[UIViewController alloc] init];
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UIView *childView = [[UIView alloc] init];
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// The ordering we expect is:
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// parentView::layoutSubviews
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// parentVC::didLayoutSubviews
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// childView::layoutSubviews
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// childVC::didLayoutSubviews
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id parentViewMock = [OCMockObject partialMockForObject:parentView];
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id parentVCMock = [OCMockObject partialMockForObject:parentVC];
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id childViewMock = [OCMockObject partialMockForObject:childView];
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id childVCMock = [OCMockObject partialMockForObject:childVC];
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__block int layoutOrderCount = 0;
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[[[parentViewMock stub] andDo:^(NSInvocation *inv) {
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if (layoutOrderCount < 4) {
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layoutOrderCount++;
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XCTAssertEqual(layoutOrderCount, 1, @"Expect parentView::layoutSubviews to be called first");
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}
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}] layoutSubviews];
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[[[parentVCMock stub] andDo:^(NSInvocation *inv) {
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if (layoutOrderCount < 4) {
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layoutOrderCount++;
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XCTAssertEqual(layoutOrderCount, 2, @"Expect parentVC::viewDidLayoutSubviews to be called 2nd");
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}
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}] viewDidLayoutSubviews];
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[[[childViewMock stub] andDo:^(NSInvocation *inv) {
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if (layoutOrderCount < 4) {
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layoutOrderCount++;
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XCTAssertEqual(layoutOrderCount, 3, @"Expect childView::layoutSubviews to be called 3rd");
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}
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}] layoutSubviews];
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[[[childVCMock stub] andDo:^(NSInvocation *inv) {
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if (layoutOrderCount < 4) {
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layoutOrderCount++;
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XCTAssertEqual(layoutOrderCount, 4, @"Expect childVC::viewDidLayoutSubviews to be called last");
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[childVCMock stopMocking];
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}
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}] viewDidLayoutSubviews];
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// setup View heirarchy and force layout
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parentVC.view = parentView;
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childVC.view = childView;
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[parentVC addChildViewController:childVC];
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[childVC didMoveToParentViewController:parentVC];
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[parentView addSubview:childView];
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[childViewMock setNeedsLayout];
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[parentViewMock layoutIfNeeded];
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XCTAssertEqual(layoutOrderCount, 4, @"Expect layoutSubviews/viewDidLayoutSubviews to be called");
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}
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@end
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