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ASStackLayoutSpecSnapshotTests.mm
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//
// ASStackLayoutSpecSnapshotTests.mm
// Texture
//
// Copyright (c) Facebook, Inc. and its affiliates. All rights reserved.
// Changes after 4/13/2017 are: Copyright (c) Pinterest, Inc. All rights reserved.
// Licensed under Apache 2.0: http://www.apache.org/licenses/LICENSE-2.0
//
#import "ASLayoutSpecSnapshotTestsHelper.h"
#import <AsyncDisplayKit/ASStackLayoutSpec.h>
#import <AsyncDisplayKit/ASStackLayoutSpecUtilities.h>
#import <AsyncDisplayKit/ASBackgroundLayoutSpec.h>
#import <AsyncDisplayKit/ASRatioLayoutSpec.h>
#import <AsyncDisplayKit/ASInsetLayoutSpec.h>
#import <AsyncDisplayKit/ASTextNode.h>
@interface ASStackLayoutSpecSnapshotTests : ASLayoutSpecSnapshotTestCase
@end
@implementation ASStackLayoutSpecSnapshotTests
#pragma mark - Utility methods
static NSArray<ASDisplayNode *> *defaultSubnodes()
{
return defaultSubnodesWithSameSize(CGSizeZero, 0);
}
static NSArray<ASDisplayNode *> *defaultSubnodesWithSameSize(CGSize subnodeSize, CGFloat flex)
{
NSArray<ASDisplayNode *> *subnodes = @[
ASDisplayNodeWithBackgroundColor([UIColor redColor], subnodeSize),
ASDisplayNodeWithBackgroundColor([UIColor blueColor], subnodeSize),
ASDisplayNodeWithBackgroundColor([UIColor greenColor], subnodeSize)
];
for (ASDisplayNode *subnode in subnodes) {
subnode.style.flexGrow = flex;
subnode.style.flexShrink = flex;
}
return subnodes;
}
static void setCGSizeToNode(CGSize size, ASDisplayNode *node)
{
node.style.width = ASDimensionMakeWithPoints(size.width);
node.style.height = ASDimensionMakeWithPoints(size.height);
}
static NSArray<ASTextNode*> *defaultTextNodes()
{
ASTextNode *textNode1 = [[ASTextNode alloc] init];
textNode1.attributedText = [[NSAttributedString alloc] initWithString:@"Hello"
attributes:@{NSFontAttributeName: [UIFont systemFontOfSize:20]}];
textNode1.backgroundColor = [UIColor redColor];
textNode1.layerBacked = YES;
ASTextNode *textNode2 = [[ASTextNode alloc] init];
textNode2.attributedText = [[NSAttributedString alloc] initWithString:@"Why, hello there! How are you?"
attributes:@{NSFontAttributeName: [UIFont systemFontOfSize:12]}];
textNode2.backgroundColor = [UIColor blueColor];
textNode2.layerBacked = YES;
return @[textNode1, textNode2];
}
- (void)testStackLayoutSpecWithJustify:(ASStackLayoutJustifyContent)justify
flexFactor:(CGFloat)flex
sizeRange:(ASSizeRange)sizeRange
identifier:(NSString *)identifier
{
ASStackLayoutSpecStyle style = {
.direction = ASStackLayoutDirectionHorizontal,
.justifyContent = justify
};
NSArray<ASDisplayNode *> *subnodes = defaultSubnodesWithSameSize({50, 50}, flex);
[self testStackLayoutSpecWithStyle:style sizeRange:sizeRange subnodes:subnodes identifier:identifier];
}
- (void)testStackLayoutSpecWithStyle:(ASStackLayoutSpecStyle)style
sizeRange:(ASSizeRange)sizeRange
subnodes:(NSArray *)subnodes
identifier:(NSString *)identifier
{
[self testStackLayoutSpecWithStyle:style children:subnodes sizeRange:sizeRange subnodes:subnodes identifier:identifier];
}
- (void)testStackLayoutSpecWithStyle:(ASStackLayoutSpecStyle)style
children:(NSArray *)children
sizeRange:(ASSizeRange)sizeRange
subnodes:(NSArray *)subnodes
identifier:(NSString *)identifier
{
ASStackLayoutSpec *stackLayoutSpec =
[ASStackLayoutSpec
stackLayoutSpecWithDirection:style.direction
spacing:style.spacing
justifyContent:style.justifyContent
alignItems:style.alignItems
flexWrap:style.flexWrap
alignContent:style.alignContent
lineSpacing:style.lineSpacing
children:children];
[self testStackLayoutSpec:stackLayoutSpec sizeRange:sizeRange subnodes:subnodes identifier:identifier];
}
- (void)testStackLayoutSpecWithDirection:(ASStackLayoutDirection)direction
itemsHorizontalAlignment:(ASHorizontalAlignment)horizontalAlignment
itemsVerticalAlignment:(ASVerticalAlignment)verticalAlignment
identifier:(NSString *)identifier
{
NSArray<ASDisplayNode *> *subnodes = defaultSubnodesWithSameSize({50, 50}, 0);
ASStackLayoutSpec *stackLayoutSpec = [[ASStackLayoutSpec alloc] init];
stackLayoutSpec.direction = direction;
stackLayoutSpec.children = subnodes;
stackLayoutSpec.horizontalAlignment = horizontalAlignment;
stackLayoutSpec.verticalAlignment = verticalAlignment;
CGSize exactSize = CGSizeMake(200, 200);
static ASSizeRange kSize = ASSizeRangeMake(exactSize, exactSize);
[self testStackLayoutSpec:stackLayoutSpec sizeRange:kSize subnodes:subnodes identifier:identifier];
}
- (void)testStackLayoutSpecWithBaselineAlignment:(ASStackLayoutAlignItems)baselineAlignment
identifier:(NSString *)identifier
{
NSAssert(baselineAlignment == ASStackLayoutAlignItemsBaselineFirst || baselineAlignment == ASStackLayoutAlignItemsBaselineLast, @"Unexpected baseline alignment");
NSArray<ASTextNode *> *textNodes = defaultTextNodes();
textNodes[1].style.flexShrink = 1.0;
ASStackLayoutSpec *stackLayoutSpec = [ASStackLayoutSpec horizontalStackLayoutSpec];
stackLayoutSpec.children = textNodes;
stackLayoutSpec.alignItems = baselineAlignment;
static ASSizeRange kSize = ASSizeRangeMake(CGSizeMake(150, 0), CGSizeMake(150, CGFLOAT_MAX));
[self testStackLayoutSpec:stackLayoutSpec sizeRange:kSize subnodes:textNodes identifier:identifier];
}
- (void)testStackLayoutSpec:(ASStackLayoutSpec *)stackLayoutSpec
sizeRange:(ASSizeRange)sizeRange
subnodes:(NSArray *)subnodes
identifier:(NSString *)identifier
{
ASDisplayNode *backgroundNode = ASDisplayNodeWithBackgroundColor([UIColor whiteColor]);
ASLayoutSpec *layoutSpec = [ASBackgroundLayoutSpec backgroundLayoutSpecWithChild:stackLayoutSpec background:backgroundNode];
NSMutableArray *newSubnodes = [NSMutableArray arrayWithObject:backgroundNode];
[newSubnodes addObjectsFromArray:subnodes];
[self testLayoutSpec:layoutSpec sizeRange:sizeRange subnodes:newSubnodes identifier:identifier];
}
- (void)testStackLayoutSpecWithAlignContent:(ASStackLayoutAlignContent)alignContent
lineSpacing:(CGFloat)lineSpacing
sizeRange:(ASSizeRange)sizeRange
identifier:(NSString *)identifier
{
ASStackLayoutSpecStyle style = {
.direction = ASStackLayoutDirectionHorizontal,
.flexWrap = ASStackLayoutFlexWrapWrap,
.alignContent = alignContent,
.lineSpacing = lineSpacing,
};
CGSize subnodeSize = {50, 50};
NSArray<ASDisplayNode *> *subnodes = @[
ASDisplayNodeWithBackgroundColor([UIColor redColor], subnodeSize),
ASDisplayNodeWithBackgroundColor([UIColor yellowColor], subnodeSize),
ASDisplayNodeWithBackgroundColor([UIColor blueColor], subnodeSize),
ASDisplayNodeWithBackgroundColor([UIColor magentaColor], subnodeSize),
ASDisplayNodeWithBackgroundColor([UIColor greenColor], subnodeSize),
ASDisplayNodeWithBackgroundColor([UIColor cyanColor], subnodeSize),
];
[self testStackLayoutSpecWithStyle:style sizeRange:sizeRange subnodes:subnodes identifier:identifier];
}
- (void)testStackLayoutSpecWithAlignContent:(ASStackLayoutAlignContent)alignContent
sizeRange:(ASSizeRange)sizeRange
identifier:(NSString *)identifier
{
[self testStackLayoutSpecWithAlignContent:alignContent lineSpacing:0.0 sizeRange:sizeRange identifier:identifier];
}
#pragma mark -
- (void)testDefaultStackLayoutElementFlexProperties
{
ASDisplayNode *displayNode = [[ASDisplayNode alloc] init];
XCTAssertEqual(displayNode.style.flexShrink, NO);
XCTAssertEqual(displayNode.style.flexGrow, NO);
const ASDimension unconstrainedDimension = ASDimensionAuto;
const ASDimension flexBasis = displayNode.style.flexBasis;
XCTAssertEqual(flexBasis.unit, unconstrainedDimension.unit);
XCTAssertEqual(flexBasis.value, unconstrainedDimension.value);
}
- (void)testUnderflowBehaviors
{
// width 300px; height 0-300px
static ASSizeRange kSize = {{300, 0}, {300, 300}};
[self testStackLayoutSpecWithJustify:ASStackLayoutJustifyContentStart flexFactor:0 sizeRange:kSize identifier:@"justifyStart"];
[self testStackLayoutSpecWithJustify:ASStackLayoutJustifyContentCenter flexFactor:0 sizeRange:kSize identifier:@"justifyCenter"];
[self testStackLayoutSpecWithJustify:ASStackLayoutJustifyContentEnd flexFactor:0 sizeRange:kSize identifier:@"justifyEnd"];
[self testStackLayoutSpecWithJustify:ASStackLayoutJustifyContentStart flexFactor:1 sizeRange:kSize identifier:@"flex"];
[self testStackLayoutSpecWithJustify:ASStackLayoutJustifyContentSpaceBetween flexFactor:0 sizeRange:kSize identifier:@"justifySpaceBetween"];
[self testStackLayoutSpecWithJustify:ASStackLayoutJustifyContentSpaceAround flexFactor:0 sizeRange:kSize identifier:@"justifySpaceAround"];
}
- (void)testOverflowBehaviors
{
// width 110px; height 0-300px
static ASSizeRange kSize = {{110, 0}, {110, 300}};
[self testStackLayoutSpecWithJustify:ASStackLayoutJustifyContentStart flexFactor:0 sizeRange:kSize identifier:@"justifyStart"];
[self testStackLayoutSpecWithJustify:ASStackLayoutJustifyContentCenter flexFactor:0 sizeRange:kSize identifier:@"justifyCenter"];
[self testStackLayoutSpecWithJustify:ASStackLayoutJustifyContentEnd flexFactor:0 sizeRange:kSize identifier:@"justifyEnd"];
[self testStackLayoutSpecWithJustify:ASStackLayoutJustifyContentStart flexFactor:1 sizeRange:kSize identifier:@"flex"];
// On overflow, "space between" is identical to "content start"
[self testStackLayoutSpecWithJustify:ASStackLayoutJustifyContentSpaceBetween flexFactor:0 sizeRange:kSize identifier:@"justifyStart"];
// On overflow, "space around" is identical to "content center"
[self testStackLayoutSpecWithJustify:ASStackLayoutJustifyContentSpaceAround flexFactor:0 sizeRange:kSize identifier:@"justifyCenter"];
}
- (void)testOverflowBehaviorsWhenAllFlexShrinkChildrenHaveBeenClampedToZeroButViolationStillExists
{
ASStackLayoutSpecStyle style = {.direction = ASStackLayoutDirectionHorizontal};
NSArray<ASDisplayNode *> *subnodes = defaultSubnodesWithSameSize({50, 50}, 0);
subnodes[1].style.flexShrink = 1;
// Width is 75px--that's less than the sum of the widths of the children, which is 100px.
static ASSizeRange kSize = {{75, 0}, {75, 150}};
[self testStackLayoutSpecWithStyle:style sizeRange:kSize subnodes:subnodes identifier:nil];
}
- (void)testFlexWithUnequalIntrinsicSizes
{
ASStackLayoutSpecStyle style = {.direction = ASStackLayoutDirectionHorizontal};
NSArray<ASDisplayNode *> *subnodes = defaultSubnodesWithSameSize({50, 50}, 1);
setCGSizeToNode({150, 150}, subnodes[1]);
// width 300px; height 0-150px.
static ASSizeRange kUnderflowSize = {{300, 0}, {300, 150}};
[self testStackLayoutSpecWithStyle:style sizeRange:kUnderflowSize subnodes:subnodes identifier:@"underflow"];
// width 200px; height 0-150px.
static ASSizeRange kOverflowSize = {{200, 0}, {200, 150}};
[self testStackLayoutSpecWithStyle:style sizeRange:kOverflowSize subnodes:subnodes identifier:@"overflow"];
}
- (void)testCrossAxisSizeBehaviors
{
ASStackLayoutSpecStyle style = {.direction = ASStackLayoutDirectionVertical};
NSArray<ASDisplayNode *> *subnodes = defaultSubnodes();
setCGSizeToNode({50, 50}, subnodes[0]);
setCGSizeToNode({100, 50}, subnodes[1]);
setCGSizeToNode({150, 50}, subnodes[2]);
// width 0-300px; height 300px
static ASSizeRange kVariableHeight = {{0, 300}, {300, 300}};
[self testStackLayoutSpecWithStyle:style sizeRange:kVariableHeight subnodes:subnodes identifier:@"variableHeight"];
// width 300px; height 300px
static ASSizeRange kFixedHeight = {{300, 300}, {300, 300}};
[self testStackLayoutSpecWithStyle:style sizeRange:kFixedHeight subnodes:subnodes identifier:@"fixedHeight"];
}
- (void)testStackSpacing
{
ASStackLayoutSpecStyle style = {
.direction = ASStackLayoutDirectionVertical,
.spacing = 10
};
NSArray<ASDisplayNode *> *subnodes = defaultSubnodes();
setCGSizeToNode({50, 50}, subnodes[0]);
setCGSizeToNode({100, 50}, subnodes[1]);
setCGSizeToNode({150, 50}, subnodes[2]);
// width 0-300px; height 300px
static ASSizeRange kVariableHeight = {{0, 300}, {300, 300}};
[self testStackLayoutSpecWithStyle:style sizeRange:kVariableHeight subnodes:subnodes identifier:@"variableHeight"];
}
- (void)testStackSpacingWithChildrenHavingNilObjects
{
// This should take a zero height since all children have a nil node. If it takes a height > 0, a blue background
// will show up, hence failing the test.
ASDisplayNode *backgroundNode = ASDisplayNodeWithBackgroundColor([UIColor blueColor]);
ASLayoutSpec *layoutSpec =
[ASInsetLayoutSpec
insetLayoutSpecWithInsets:{10, 10, 10, 10}
child:
[ASBackgroundLayoutSpec
backgroundLayoutSpecWithChild:
[ASStackLayoutSpec
stackLayoutSpecWithDirection:ASStackLayoutDirectionVertical
spacing:10
justifyContent:ASStackLayoutJustifyContentStart
alignItems:ASStackLayoutAlignItemsStretch
children:@[]]
background:backgroundNode]];
// width 300px; height 0-300px
static ASSizeRange kVariableHeight = {{300, 0}, {300, 300}};
[self testLayoutSpec:layoutSpec sizeRange:kVariableHeight subnodes:@[backgroundNode] identifier:@"variableHeight"];
}
- (void)testChildSpacing
{
// width 0-INF; height 0-INF
static ASSizeRange kAnySize = {{0, 0}, {INFINITY, INFINITY}};
ASStackLayoutSpecStyle style = {.direction = ASStackLayoutDirectionVertical};
NSArray<ASDisplayNode *> *subnodes = defaultSubnodes();
setCGSizeToNode({50, 50}, subnodes[0]);
setCGSizeToNode({100, 70}, subnodes[1]);
setCGSizeToNode({150, 90}, subnodes[2]);
subnodes[1].style.spacingBefore = 10;
subnodes[2].style.spacingBefore = 20;
[self testStackLayoutSpecWithStyle:style sizeRange:kAnySize subnodes:subnodes identifier:@"spacingBefore"];
// Reset above spacing values
subnodes[1].style.spacingBefore = 0;
subnodes[2].style.spacingBefore = 0;
subnodes[1].style.spacingAfter = 10;
subnodes[2].style.spacingAfter = 20;
[self testStackLayoutSpecWithStyle:style sizeRange:kAnySize subnodes:subnodes identifier:@"spacingAfter"];
// Reset above spacing values
subnodes[1].style.spacingAfter = 0;
subnodes[2].style.spacingAfter = 0;
style.spacing = 10;
subnodes[1].style.spacingBefore = -10;
subnodes[1].style.spacingAfter = -10;
[self testStackLayoutSpecWithStyle:style sizeRange:kAnySize subnodes:subnodes identifier:@"spacingBalancedOut"];
}
- (void)testJustifiedCenterWithChildSpacing
{
ASStackLayoutSpecStyle style = {
.direction = ASStackLayoutDirectionVertical,
.justifyContent = ASStackLayoutJustifyContentCenter
};
NSArray<ASDisplayNode *> *subnodes = defaultSubnodes();
setCGSizeToNode({50, 50}, subnodes[0]);
setCGSizeToNode({100, 70}, subnodes[1]);
setCGSizeToNode({150, 90}, subnodes[2]);
subnodes[0].style.spacingBefore = 0;
subnodes[1].style.spacingBefore = 20;
subnodes[2].style.spacingBefore = 30;
// width 0-300px; height 300px
static ASSizeRange kVariableHeight = {{0, 300}, {300, 300}};
[self testStackLayoutSpecWithStyle:style sizeRange:kVariableHeight subnodes:subnodes identifier:@"variableHeight"];
}
- (void)testJustifiedSpaceBetweenWithOneChild
{
ASStackLayoutSpecStyle style = {
.direction = ASStackLayoutDirectionHorizontal,
.justifyContent = ASStackLayoutJustifyContentSpaceBetween
};
ASDisplayNode *child = ASDisplayNodeWithBackgroundColor([UIColor redColor], {50, 50});
// width 300px; height 0-INF
static ASSizeRange kVariableHeight = {{300, 0}, {300, INFINITY}};
[self testStackLayoutSpecWithStyle:style sizeRange:kVariableHeight subnodes:@[child] identifier:nil];
}
- (void)testJustifiedSpaceAroundWithOneChild
{
ASStackLayoutSpecStyle style = {
.direction = ASStackLayoutDirectionHorizontal,
.justifyContent = ASStackLayoutJustifyContentSpaceAround
};
ASDisplayNode *child = ASDisplayNodeWithBackgroundColor([UIColor redColor], {50, 50});
// width 300px; height 0-INF
static ASSizeRange kVariableHeight = {{300, 0}, {300, INFINITY}};
[self testStackLayoutSpecWithStyle:style sizeRange:kVariableHeight subnodes:@[child] identifier:nil];
}
- (void)testJustifiedSpaceBetweenWithRemainingSpace
{
// width 301px; height 0-300px;
static ASSizeRange kSize = {{301, 0}, {301, 300}};
[self testStackLayoutSpecWithJustify:ASStackLayoutJustifyContentSpaceBetween flexFactor:0 sizeRange:kSize identifier:nil];
}
- (void)testJustifiedSpaceAroundWithRemainingSpace
{
// width 305px; height 0-300px;
static ASSizeRange kSize = {{305, 0}, {305, 300}};
[self testStackLayoutSpecWithJustify:ASStackLayoutJustifyContentSpaceAround flexFactor:0 sizeRange:kSize identifier:nil];
}
- (void)testChildThatChangesCrossSizeWhenMainSizeIsFlexed
{
ASStackLayoutSpecStyle style = {.direction = ASStackLayoutDirectionHorizontal};
ASDisplayNode *subnode1 = ASDisplayNodeWithBackgroundColor([UIColor blueColor]);
ASDisplayNode *subnode2 = ASDisplayNodeWithBackgroundColor([UIColor redColor], {50, 50});
ASRatioLayoutSpec *child1 = [ASRatioLayoutSpec ratioLayoutSpecWithRatio:1.5 child:subnode1];
child1.style.flexBasis = ASDimensionMakeWithFraction(1);
child1.style.flexGrow = 1;
child1.style.flexShrink = 1;
static ASSizeRange kFixedWidth = {{150, 0}, {150, INFINITY}};
[self testStackLayoutSpecWithStyle:style children:@[child1, subnode2] sizeRange:kFixedWidth subnodes:@[subnode1, subnode2] identifier:nil];
}
- (void)testAlignCenterWithFlexedMainDimension
{
ASStackLayoutSpecStyle style = {
.direction = ASStackLayoutDirectionVertical,
.alignItems = ASStackLayoutAlignItemsCenter
};
NSArray<ASDisplayNode *> *subnodes = @[
ASDisplayNodeWithBackgroundColor([UIColor redColor], {100, 100}),
ASDisplayNodeWithBackgroundColor([UIColor blueColor], {50, 50})
];
subnodes[0].style.flexShrink = 1;
subnodes[1].style.flexShrink = 1;
static ASSizeRange kFixedWidth = {{150, 0}, {150, 100}};
[self testStackLayoutSpecWithStyle:style sizeRange:kFixedWidth subnodes:subnodes identifier:nil];
}
- (void)testAlignCenterWithIndefiniteCrossDimension
{
ASStackLayoutSpecStyle style = {.direction = ASStackLayoutDirectionHorizontal};
ASDisplayNode *subnode1 = ASDisplayNodeWithBackgroundColor([UIColor redColor], {100, 100});
ASDisplayNode *subnode2 = ASDisplayNodeWithBackgroundColor([UIColor blueColor], {50, 50});
subnode2.style.alignSelf = ASStackLayoutAlignSelfCenter;
NSArray<ASDisplayNode *> *subnodes = @[subnode1, subnode2];
static ASSizeRange kFixedWidth = {{150, 0}, {150, INFINITY}};
[self testStackLayoutSpecWithStyle:style sizeRange:kFixedWidth subnodes:subnodes identifier:nil];
}
- (void)testAlignedStart
{
ASStackLayoutSpecStyle style = {
.direction = ASStackLayoutDirectionVertical,
.justifyContent = ASStackLayoutJustifyContentCenter,
.alignItems = ASStackLayoutAlignItemsStart
};
NSArray<ASDisplayNode *> *subnodes = defaultSubnodes();
setCGSizeToNode({50, 50}, subnodes[0]);
setCGSizeToNode({100, 70}, subnodes[1]);
setCGSizeToNode({150, 90}, subnodes[2]);
subnodes[0].style.spacingBefore = 0;
subnodes[1].style.spacingBefore = 20;
subnodes[2].style.spacingBefore = 30;
static ASSizeRange kExactSize = {{300, 300}, {300, 300}};
[self testStackLayoutSpecWithStyle:style sizeRange:kExactSize subnodes:subnodes identifier:nil];
}
- (void)testAlignedEnd
{
ASStackLayoutSpecStyle style = {
.direction = ASStackLayoutDirectionVertical,
.justifyContent = ASStackLayoutJustifyContentCenter,
.alignItems = ASStackLayoutAlignItemsEnd
};
NSArray<ASDisplayNode *> *subnodes = defaultSubnodes();
setCGSizeToNode({50, 50}, subnodes[0]);
setCGSizeToNode({100, 70}, subnodes[1]);
setCGSizeToNode({150, 90}, subnodes[2]);
subnodes[0].style.spacingBefore = 0;
subnodes[1].style.spacingBefore = 20;
subnodes[2].style.spacingBefore = 30;
static ASSizeRange kExactSize = {{300, 300}, {300, 300}};
[self testStackLayoutSpecWithStyle:style sizeRange:kExactSize subnodes:subnodes identifier:nil];
}
- (void)testAlignedCenter
{
ASStackLayoutSpecStyle style = {
.direction = ASStackLayoutDirectionVertical,
.justifyContent = ASStackLayoutJustifyContentCenter,
.alignItems = ASStackLayoutAlignItemsCenter
};
NSArray<ASDisplayNode *> *subnodes = defaultSubnodes();
setCGSizeToNode({50, 50}, subnodes[0]);
setCGSizeToNode({100, 70}, subnodes[1]);
setCGSizeToNode({150, 90}, subnodes[2]);
subnodes[0].style.spacingBefore = 0;
subnodes[1].style.spacingBefore = 20;
subnodes[2].style.spacingBefore = 30;
static ASSizeRange kExactSize = {{300, 300}, {300, 300}};
[self testStackLayoutSpecWithStyle:style sizeRange:kExactSize subnodes:subnodes identifier:nil];
}
- (void)testAlignedStretchNoChildExceedsMin
{
ASStackLayoutSpecStyle style = {
.direction = ASStackLayoutDirectionVertical,
.justifyContent = ASStackLayoutJustifyContentCenter,
.alignItems = ASStackLayoutAlignItemsStretch
};
NSArray<ASDisplayNode *> *subnodes = defaultSubnodes();
setCGSizeToNode({50, 50}, subnodes[0]);
setCGSizeToNode({100, 70}, subnodes[1]);
setCGSizeToNode({150, 90}, subnodes[2]);
subnodes[0].style.spacingBefore = 0;
subnodes[1].style.spacingBefore = 20;
subnodes[2].style.spacingBefore = 30;
static ASSizeRange kVariableSize = {{200, 200}, {300, 300}};
// all children should be 200px wide
[self testStackLayoutSpecWithStyle:style sizeRange:kVariableSize subnodes:subnodes identifier:nil];
}
- (void)testAlignedStretchOneChildExceedsMin
{
ASStackLayoutSpecStyle style = {
.direction = ASStackLayoutDirectionVertical,
.justifyContent = ASStackLayoutJustifyContentCenter,
.alignItems = ASStackLayoutAlignItemsStretch
};
NSArray<ASDisplayNode *> *subnodes = defaultSubnodes();
setCGSizeToNode({50, 50}, subnodes[0]);
setCGSizeToNode({100, 70}, subnodes[1]);
setCGSizeToNode({150, 90}, subnodes[2]);
subnodes[0].style.spacingBefore = 0;
subnodes[1].style.spacingBefore = 20;
subnodes[2].style.spacingBefore = 30;
static ASSizeRange kVariableSize = {{50, 50}, {300, 300}};
// all children should be 150px wide
[self testStackLayoutSpecWithStyle:style sizeRange:kVariableSize subnodes:subnodes identifier:nil];
}
- (void)testEmptyStack
{
static ASSizeRange kVariableSize = {{50, 50}, {300, 300}};
[self testStackLayoutSpecWithStyle:{} sizeRange:kVariableSize subnodes:@[] identifier:nil];
}
- (void)testFixedFlexBasisAppliedWhenFlexingItems
{
ASStackLayoutSpecStyle style = {.direction = ASStackLayoutDirectionHorizontal};
NSArray<ASDisplayNode *> *subnodes = defaultSubnodesWithSameSize({50, 50}, 0);
setCGSizeToNode({150, 150}, subnodes[1]);
for (ASDisplayNode *subnode in subnodes) {
subnode.style.flexGrow = 1;
subnode.style.flexBasis = ASDimensionMakeWithPoints(10);
}
// width 300px; height 0-150px.
static ASSizeRange kUnderflowSize = {{300, 0}, {300, 150}};
[self testStackLayoutSpecWithStyle:style sizeRange:kUnderflowSize subnodes:subnodes identifier:@"underflow"];
// width 200px; height 0-150px.
static ASSizeRange kOverflowSize = {{200, 0}, {200, 150}};
[self testStackLayoutSpecWithStyle:style sizeRange:kOverflowSize subnodes:subnodes identifier:@"overflow"];
}
- (void)testFractionalFlexBasisResolvesAgainstParentSize
{
ASStackLayoutSpecStyle style = {.direction = ASStackLayoutDirectionHorizontal};
NSArray<ASDisplayNode *> *subnodes = defaultSubnodesWithSameSize({50, 50}, 0);
for (ASDisplayNode *subnode in subnodes) {
subnode.style.flexGrow = 1;
}
// This should override the intrinsic size of 50pts and instead compute to 50% = 100pts.
// The result should be that the red box is twice as wide as the blue and gree boxes after flexing.
subnodes[0].style.flexBasis = ASDimensionMakeWithFraction(0.5);
static ASSizeRange kSize = {{200, 0}, {200, INFINITY}};
[self testStackLayoutSpecWithStyle:style sizeRange:kSize subnodes:subnodes identifier:nil];
}
- (void)testFixedFlexBasisOverridesIntrinsicSizeForNonFlexingChildren
{
ASStackLayoutSpecStyle style = {.direction = ASStackLayoutDirectionHorizontal};
NSArray<ASDisplayNode *> *subnodes = defaultSubnodes();
setCGSizeToNode({50, 50}, subnodes[0]);
setCGSizeToNode({150, 150}, subnodes[1]);
setCGSizeToNode({150, 50}, subnodes[2]);
for (ASDisplayNode *subnode in subnodes) {
subnode.style.flexBasis = ASDimensionMakeWithPoints(20);
}
static ASSizeRange kSize = {{300, 0}, {300, 150}};
[self testStackLayoutSpecWithStyle:style sizeRange:kSize subnodes:subnodes identifier:nil];
}
- (void)testCrossAxisStretchingOccursAfterStackAxisFlexing
{
// If cross axis stretching occurred *before* flexing, then the blue child would be stretched to 3000 points tall.
// Instead it should be stretched to 300 points tall, matching the red child and not overlapping the green inset.
NSArray<ASDisplayNode *> *subnodes = @[
ASDisplayNodeWithBackgroundColor([UIColor greenColor]), // Inset background node
ASDisplayNodeWithBackgroundColor([UIColor blueColor]), // child1 of stack
ASDisplayNodeWithBackgroundColor([UIColor redColor], {500, 500}) // child2 of stack
];
subnodes[1].style.width = ASDimensionMake(10);
ASDisplayNode *child2 = subnodes[2];
child2.style.flexGrow = 1;
child2.style.flexShrink = 1;
// If cross axis stretching occurred *before* flexing, then the blue child would be stretched to 3000 points tall.
// Instead it should be stretched to 300 points tall, matching the red child and not overlapping the green inset.
ASLayoutSpec *layoutSpec =
[ASBackgroundLayoutSpec
backgroundLayoutSpecWithChild:
[ASInsetLayoutSpec
insetLayoutSpecWithInsets:UIEdgeInsetsMake(10, 10, 10, 10)
child:
[ASStackLayoutSpec
stackLayoutSpecWithDirection:ASStackLayoutDirectionHorizontal
spacing:0
justifyContent:ASStackLayoutJustifyContentStart
alignItems:ASStackLayoutAlignItemsStretch
children:@[subnodes[1], child2]]
]
background:subnodes[0]];
static ASSizeRange kSize = {{300, 0}, {300, INFINITY}};
[self testLayoutSpec:layoutSpec sizeRange:kSize subnodes:subnodes identifier:nil];
}
- (void)testPositiveViolationIsDistributedEqually
{
ASStackLayoutSpecStyle style = {.direction = ASStackLayoutDirectionHorizontal};
NSArray<ASDisplayNode *> *subnodes = defaultSubnodesWithSameSize({50, 50}, 0);
subnodes[0].style.flexGrow = 1;
subnodes[2].style.flexGrow = 1;
// In this scenario a width of 350 results in a positive violation of 200.
// Due to each flexible subnode specifying a flex grow factor of 1 the violation will be distributed evenly.
static ASSizeRange kSize = {{350, 350}, {350, 350}};
[self testStackLayoutSpecWithStyle:style sizeRange:kSize subnodes:subnodes identifier:nil];
}
- (void)testPositiveViolationIsDistributedEquallyWithArbitraryFloats
{
ASStackLayoutSpecStyle style = {.direction = ASStackLayoutDirectionHorizontal};
NSArray<ASDisplayNode *> *subnodes = defaultSubnodesWithSameSize({50, 50}, 0);
subnodes[0].style.flexGrow = 0.5;
subnodes[2].style.flexGrow = 0.5;
// In this scenario a width of 350 results in a positive violation of 200.
// Due to each flexible child component specifying a flex grow factor of 0.5 the violation will be distributed evenly.
static ASSizeRange kSize = {{350, 350}, {350, 350}};
[self testStackLayoutSpecWithStyle:style sizeRange:kSize subnodes:subnodes identifier:nil];
}
- (void)testPositiveViolationIsDistributedProportionally
{
ASStackLayoutSpecStyle style = {.direction = ASStackLayoutDirectionVertical};
NSArray<ASDisplayNode *> *subnodes = defaultSubnodesWithSameSize({50, 50}, 0);
subnodes[0].style.flexGrow = 1;
subnodes[1].style.flexGrow = 2;
subnodes[2].style.flexGrow = 1;
// In this scenario a width of 350 results in a positive violation of 200.
// The first and third subnodes specify a flex grow factor of 1 and will flex by 50.
// The second subnode specifies a flex grow factor of 2 and will flex by 100.
static ASSizeRange kSize = {{350, 350}, {350, 350}};
[self testStackLayoutSpecWithStyle:style sizeRange:kSize subnodes:subnodes identifier:nil];
}
- (void)testPositiveViolationIsDistributedProportionallyWithArbitraryFloats
{
ASStackLayoutSpecStyle style = {.direction = ASStackLayoutDirectionVertical};
NSArray<ASDisplayNode *> *subnodes = defaultSubnodesWithSameSize({50, 50}, 0);
subnodes[0].style.flexGrow = 0.25;
subnodes[1].style.flexGrow = 0.50;
subnodes[2].style.flexGrow = 0.25;
// In this scenario a width of 350 results in a positive violation of 200.
// The first and third child components specify a flex grow factor of 0.25 and will flex by 50.
// The second child component specifies a flex grow factor of 0.25 and will flex by 100.
static ASSizeRange kSize = {{350, 350}, {350, 350}};
[self testStackLayoutSpecWithStyle:style sizeRange:kSize subnodes:subnodes identifier:nil];
}
- (void)testPositiveViolationIsDistributedEquallyAmongMixedChildren
{
ASStackLayoutSpecStyle style = {.direction = ASStackLayoutDirectionHorizontal};
const CGSize kSubnodeSize = {50, 50};
NSArray<ASDisplayNode *> *subnodes = defaultSubnodesWithSameSize(kSubnodeSize, 0);
subnodes = [subnodes arrayByAddingObject:ASDisplayNodeWithBackgroundColor([UIColor yellowColor], kSubnodeSize)];
subnodes[0].style.flexShrink = 1;
subnodes[1].style.flexGrow = 1;
subnodes[2].style.flexShrink = 0;
subnodes[3].style.flexGrow = 1;
// In this scenario a width of 400 results in a positive violation of 200.
// The first and third subnode specify a flex shrink factor of 1 and 0, respectively. They won't flex.
// The second and fourth subnode specify a flex grow factor of 1 and will flex by 100.
static ASSizeRange kSize = {{400, 400}, {400, 400}};
[self testStackLayoutSpecWithStyle:style sizeRange:kSize subnodes:subnodes identifier:nil];
}
- (void)testPositiveViolationIsDistributedEquallyAmongMixedChildrenWithArbitraryFloats
{
ASStackLayoutSpecStyle style = {.direction = ASStackLayoutDirectionHorizontal};
const CGSize kSubnodeSize = {50, 50};
NSArray<ASDisplayNode *> *subnodes = defaultSubnodesWithSameSize(kSubnodeSize, 0);
subnodes = [subnodes arrayByAddingObject:ASDisplayNodeWithBackgroundColor([UIColor yellowColor], kSubnodeSize)];
subnodes[0].style.flexShrink = 1.0;
subnodes[1].style.flexGrow = 0.5;
subnodes[2].style.flexShrink = 0.0;
subnodes[3].style.flexGrow = 0.5;
// In this scenario a width of 400 results in a positive violation of 200.
// The first and third child components specify a flex shrink factor of 1 and 0, respectively. They won't flex.
// The second and fourth child components specify a flex grow factor of 0.5 and will flex by 100.
static ASSizeRange kSize = {{400, 400}, {400, 400}};
[self testStackLayoutSpecWithStyle:style sizeRange:kSize subnodes:subnodes identifier:nil];
}
- (void)testPositiveViolationIsDistributedProportionallyAmongMixedChildren
{
ASStackLayoutSpecStyle style = {.direction = ASStackLayoutDirectionVertical};
const CGSize kSubnodeSize = {50, 50};
NSArray<ASDisplayNode *> *subnodes = defaultSubnodesWithSameSize(kSubnodeSize, 0);
subnodes = [subnodes arrayByAddingObject:ASDisplayNodeWithBackgroundColor([UIColor yellowColor], kSubnodeSize)];
subnodes[0].style.flexShrink = 1;
subnodes[1].style.flexGrow = 3;
subnodes[2].style.flexShrink = 0;
subnodes[3].style.flexGrow = 1;
// In this scenario a width of 400 results in a positive violation of 200.
// The first and third subnodes specify a flex shrink factor of 1 and 0, respectively. They won't flex.
// The second child subnode specifies a flex grow factor of 3 and will flex by 150.
// The fourth child subnode specifies a flex grow factor of 1 and will flex by 50.
static ASSizeRange kSize = {{400, 400}, {400, 400}};
[self testStackLayoutSpecWithStyle:style sizeRange:kSize subnodes:subnodes identifier:nil];
}
- (void)testPositiveViolationIsDistributedProportionallyAmongMixedChildrenWithArbitraryFloats
{
ASStackLayoutSpecStyle style = {.direction = ASStackLayoutDirectionVertical};
const CGSize kSubnodeSize = {50, 50};
NSArray<ASDisplayNode *> *subnodes = defaultSubnodesWithSameSize(kSubnodeSize, 0);
subnodes = [subnodes arrayByAddingObject:ASDisplayNodeWithBackgroundColor([UIColor yellowColor], kSubnodeSize)];
subnodes[0].style.flexShrink = 1.0;
subnodes[1].style.flexGrow = 0.75;
subnodes[2].style.flexShrink = 0.0;
subnodes[3].style.flexGrow = 0.25;
// In this scenario a width of 400 results in a positive violation of 200.
// The first and third child components specify a flex shrink factor of 1 and 0, respectively. They won't flex.
// The second child component specifies a flex grow factor of 0.75 and will flex by 150.
// The fourth child component specifies a flex grow factor of 0.25 and will flex by 50.
static ASSizeRange kSize = {{400, 400}, {400, 400}};
[self testStackLayoutSpecWithStyle:style sizeRange:kSize subnodes:subnodes identifier:nil];
}
- (void)testRemainingViolationIsAppliedProperlyToFirstFlexibleChild
{
ASStackLayoutSpecStyle style = {.direction = ASStackLayoutDirectionVertical};
NSArray<ASDisplayNode *> *subnodes = @[
ASDisplayNodeWithBackgroundColor([UIColor greenColor], {50, 25}),
ASDisplayNodeWithBackgroundColor([UIColor blueColor], {50, 0}),
ASDisplayNodeWithBackgroundColor([UIColor redColor], {50, 100})
];
subnodes[0].style.flexGrow = 0;
subnodes[1].style.flexGrow = 1;
subnodes[2].style.flexGrow = 1;
// In this scenario a width of 300 results in a positive violation of 175.
// The second and third subnodes specify a flex grow factor of 1 and will flex by 88 and 87, respectively.
static ASSizeRange kSize = {{300, 300}, {300, 300}};
[self testStackLayoutSpecWithStyle:style sizeRange:kSize subnodes:subnodes identifier:nil];
}
- (void)testRemainingViolationIsAppliedProperlyToFirstFlexibleChildWithArbitraryFloats
{
ASStackLayoutSpecStyle style = {.direction = ASStackLayoutDirectionVertical};
NSArray<ASDisplayNode *> *subnodes = @[
ASDisplayNodeWithBackgroundColor([UIColor greenColor], {50, 25}),
ASDisplayNodeWithBackgroundColor([UIColor blueColor], {50, 0}),
ASDisplayNodeWithBackgroundColor([UIColor redColor], {50, 100})
];
subnodes[0].style.flexGrow = 0.0;
subnodes[1].style.flexGrow = 0.5;
subnodes[2].style.flexGrow = 0.5;
// In this scenario a width of 300 results in a positive violation of 175.
// The second and third child components specify a flex grow factor of 0.5 and will flex by 88 and 87, respectively.
static ASSizeRange kSize = {{300, 300}, {300, 300}};
[self testStackLayoutSpecWithStyle:style sizeRange:kSize subnodes:subnodes identifier:nil];
}
- (void)testNegativeViolationIsDistributedBasedOnSize
{
ASStackLayoutSpecStyle style = {.direction = ASStackLayoutDirectionHorizontal};
NSArray<ASDisplayNode *> *subnodes = @[
ASDisplayNodeWithBackgroundColor([UIColor greenColor], {300, 50}),
ASDisplayNodeWithBackgroundColor([UIColor blueColor], {100, 50}),
ASDisplayNodeWithBackgroundColor([UIColor redColor], {200, 50})
];
subnodes[0].style.flexShrink = 1;
subnodes[1].style.flexShrink = 0;
subnodes[2].style.flexShrink = 1;
// In this scenario a width of 400 results in a negative violation of 200.
// The first and third subnodes specify a flex shrink factor of 1 and will flex by -120 and -80, respectively.
static ASSizeRange kSize = {{400, 400}, {400, 400}};
[self testStackLayoutSpecWithStyle:style sizeRange:kSize subnodes:subnodes identifier:nil];
}
- (void)testNegativeViolationIsDistributedBasedOnSizeWithArbitraryFloats
{
ASStackLayoutSpecStyle style = {.direction = ASStackLayoutDirectionHorizontal};
NSArray<ASDisplayNode *> *subnodes = @[
ASDisplayNodeWithBackgroundColor([UIColor greenColor], {300, 50}),
ASDisplayNodeWithBackgroundColor([UIColor blueColor], {100, 50}),
ASDisplayNodeWithBackgroundColor([UIColor redColor], {200, 50})
];
subnodes[0].style.flexShrink = 0.5;
subnodes[1].style.flexShrink = 0.0;
subnodes[2].style.flexShrink = 0.5;
// In this scenario a width of 400 results in a negative violation of 200.
// The first and third child components specify a flex shrink factor of 0.5 and will flex by -120 and -80, respectively.
static ASSizeRange kSize = {{400, 400}, {400, 400}};
[self testStackLayoutSpecWithStyle:style sizeRange:kSize subnodes:subnodes identifier:nil];
}
- (void)testNegativeViolationIsDistributedBasedOnSizeAndFlexFactor
{
ASStackLayoutSpecStyle style = {.direction = ASStackLayoutDirectionVertical};
NSArray<ASDisplayNode *> *subnodes = @[
ASDisplayNodeWithBackgroundColor([UIColor greenColor], {50, 300}),
ASDisplayNodeWithBackgroundColor([UIColor blueColor], {50, 100}),
ASDisplayNodeWithBackgroundColor([UIColor redColor], {50, 200})
];
subnodes[0].style.flexShrink = 2;
subnodes[1].style.flexShrink = 1;
subnodes[2].style.flexShrink = 2;
// In this scenario a width of 400 results in a negative violation of 200.
// The first and third subnodes specify a flex shrink factor of 2 and will flex by -109 and -72, respectively.
// The second subnode specifies a flex shrink factor of 1 and will flex by -18.
static ASSizeRange kSize = {{400, 400}, {400, 400}};
[self testStackLayoutSpecWithStyle:style sizeRange:kSize subnodes:subnodes identifier:nil];
}
- (void)testNegativeViolationIsDistributedBasedOnSizeAndFlexFactorWithArbitraryFloats
{
ASStackLayoutSpecStyle style = {.direction = ASStackLayoutDirectionVertical};
NSArray<ASDisplayNode *> *subnodes = @[
ASDisplayNodeWithBackgroundColor([UIColor greenColor], {50, 300}),
ASDisplayNodeWithBackgroundColor([UIColor blueColor], {50, 100}),
ASDisplayNodeWithBackgroundColor([UIColor redColor], {50, 200})
];
subnodes[0].style.flexShrink = 0.4;
subnodes[1].style.flexShrink = 0.2;
subnodes[2].style.flexShrink = 0.4;
// In this scenario a width of 400 results in a negative violation of 200.
// The first and third child components specify a flex shrink factor of 0.4 and will flex by -109 and -72, respectively.
// The second child component specifies a flex shrink factor of 0.2 and will flex by -18.
static ASSizeRange kSize = {{400, 400}, {400, 400}};
[self testStackLayoutSpecWithStyle:style sizeRange:kSize subnodes:subnodes identifier:nil];
}
- (void)testNegativeViolationIsDistributedBasedOnSizeAmongMixedChildrenChildren
{
ASStackLayoutSpecStyle style = {.direction = ASStackLayoutDirectionHorizontal};
const CGSize kSubnodeSize = {150, 50};
NSArray<ASDisplayNode *> *subnodes = defaultSubnodesWithSameSize(kSubnodeSize, 0);
subnodes = [subnodes arrayByAddingObject:ASDisplayNodeWithBackgroundColor([UIColor yellowColor], kSubnodeSize)];
subnodes[0].style.flexGrow = 1;
subnodes[1].style.flexShrink = 1;
subnodes[2].style.flexGrow = 0;
subnodes[3].style.flexShrink = 1;
// In this scenario a width of 400 results in a negative violation of 200.
// The first and third subnodes specify a flex grow factor of 1 and 0, respectively. They won't flex.
// The second and fourth subnodes specify a flex grow factor of 1 and will flex by -100.
static ASSizeRange kSize = {{400, 400}, {400, 400}};
[self testStackLayoutSpecWithStyle:style sizeRange:kSize subnodes:subnodes identifier:nil];
}
- (void)testNegativeViolationIsDistributedBasedOnSizeAmongMixedChildrenWithArbitraryFloats
{
ASStackLayoutSpecStyle style = {.direction = ASStackLayoutDirectionHorizontal};
const CGSize kSubnodeSize = {150, 50};
NSArray<ASDisplayNode *> *subnodes = defaultSubnodesWithSameSize(kSubnodeSize, 0);
subnodes = [subnodes arrayByAddingObject:ASDisplayNodeWithBackgroundColor([UIColor yellowColor], kSubnodeSize)];
subnodes[0].style.flexGrow = 1.0;
subnodes[1].style.flexShrink = 0.5;
subnodes[2].style.flexGrow = 0.0;
subnodes[3].style.flexShrink = 0.5;
// In this scenario a width of 400 results in a negative violation of 200.
// The first and third child components specify a flex grow factor of 1 and 0, respectively. They won't flex.
// The second and fourth child components specify a flex shrink factor of 0.5 and will flex by -100.
static ASSizeRange kSize = {{400, 400}, {400, 400}};
[self testStackLayoutSpecWithStyle:style sizeRange:kSize subnodes:subnodes identifier:nil];
}
- (void)testNegativeViolationIsDistributedBasedOnSizeAndFlexFactorAmongMixedChildren
{
ASStackLayoutSpecStyle style = {.direction = ASStackLayoutDirectionVertical};
NSArray<ASDisplayNode *> *subnodes = @[
ASDisplayNodeWithBackgroundColor([UIColor greenColor], {50, 150}),
ASDisplayNodeWithBackgroundColor([UIColor blueColor], {50, 100}),
ASDisplayNodeWithBackgroundColor([UIColor redColor], {50, 150}),
ASDisplayNodeWithBackgroundColor([UIColor yellowColor], {50, 200})
];
subnodes[0].style.flexGrow = 1;
subnodes[1].style.flexShrink = 1;
subnodes[2].style.flexGrow = 0;
subnodes[3].style.flexShrink = 3;
// In this scenario a width of 400 results in a negative violation of 200.
// The first and third subnodes specify a flex grow factor of 1 and 0, respectively. They won't flex.
// The second subnode specifies a flex grow factor of 1 and will flex by -28.
// The fourth subnode specifies a flex grow factor of 3 and will flex by -171.
static ASSizeRange kSize = {{400, 400}, {400, 400}};
[self testStackLayoutSpecWithStyle:style sizeRange:kSize subnodes:subnodes identifier:nil];
}
- (void)testNegativeViolationIsDistributedBasedOnSizeAndFlexFactorAmongMixedChildrenArbitraryFloats
{
ASStackLayoutSpecStyle style = {.direction = ASStackLayoutDirectionVertical};
NSArray<ASDisplayNode *> *subnodes = @[
ASDisplayNodeWithBackgroundColor([UIColor greenColor], {50, 150}),