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108 lines
2.7 KiB
Objective-C
108 lines
2.7 KiB
Objective-C
//
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// ASCALayerTests.m
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// AsyncDisplayKit
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//
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// Created by Adlai Holler on 9/2/16.
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// Copyright © 2016 Facebook. All rights reserved.
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//
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#import <XCTest/XCTest.h>
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#import <OCMock/OCMock.h>
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#import <OCMock/NSInvocation+OCMAdditions.h>
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/**
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* Tests that confirm what we know about Core Animation behavior.
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*
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* These tests are not run during the normal test action. You can run them yourself
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* to investigate and confirm CA behavior.
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*/
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@interface ASCALayerTests : XCTestCase
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@end
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#define DeclareLayerAndSublayer() \
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CALayer *realSublayer = [CALayer layer]; \
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id layer = [OCMockObject partialMockForObject:[CALayer layer]]; \
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id sublayer = [OCMockObject partialMockForObject:realSublayer]; \
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[layer addSublayer:realSublayer];
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@implementation ASCALayerTests
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- (void)testThatLayerBeginsWithCleanLayout
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{
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XCTAssertFalse([CALayer layer].needsLayout);
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}
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- (void)testThatAddingSublayersDirtysLayout
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{
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CALayer *layer = [CALayer layer];
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[layer addSublayer:[CALayer layer]];
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XCTAssertTrue([layer needsLayout]);
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}
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- (void)testThatRemovingSublayersDirtysLayout
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{
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DeclareLayerAndSublayer();
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[layer layoutIfNeeded];
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XCTAssertFalse([layer needsLayout]);
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[sublayer removeFromSuperlayer];
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XCTAssertTrue([layer needsLayout]);
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}
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- (void)testDirtySublayerLayoutDoesntDirtySuperlayer
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{
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DeclareLayerAndSublayer();
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[layer layoutIfNeeded];
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// Dirtying sublayer doesn't dirty superlayer.
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[sublayer setNeedsLayout];
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XCTAssertTrue([sublayer needsLayout]);
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XCTAssertFalse([layer needsLayout]);
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[[[sublayer expect] andForwardToRealObject] layoutSublayers];
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// NOTE: We specifically don't expect layer to get -layoutSublayers
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[sublayer layoutIfNeeded];
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[sublayer verify];
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[layer verify];
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}
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- (void)testDirtySuperlayerLayoutDoesntDirtySublayerLayout
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{
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DeclareLayerAndSublayer();
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[layer layoutIfNeeded];
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// Dirtying superlayer doesn't dirty sublayer.
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[layer setNeedsLayout];
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XCTAssertTrue([layer needsLayout]);
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XCTAssertFalse([sublayer needsLayout]);
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[[[layer expect] andForwardToRealObject] layoutSublayers];
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// NOTE: We specifically don't expect sublayer to get -layoutSublayers
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[layer layoutIfNeeded];
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[sublayer verify];
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[layer verify];
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}
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- (void)testDirtyHierarchyIsLaidOutTopDown
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{
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DeclareLayerAndSublayer();
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[sublayer setNeedsLayout];
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XCTAssertTrue([layer needsLayout]);
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XCTAssertTrue([sublayer needsLayout]);
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__block BOOL superlayerLaidOut = NO;
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[[[[layer expect] andDo:^(NSInvocation *i) {
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superlayerLaidOut = YES;
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}] andForwardToRealObject] layoutSublayers];
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[[[[sublayer expect] andDo:^(NSInvocation *i) {
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XCTAssertTrue(superlayerLaidOut);
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}] andForwardToRealObject] layoutSublayers];
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[layer layoutIfNeeded];
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[sublayer verify];
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[layer verify];
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}
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@end
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