Swiftgram/AsyncDisplayKitTests/ASDisplayNodeLayoutTests.mm
Michael Schneider 75dca556e6 [Layout] Add style property to ASLayoutable (#2261)
* Add style property to ASLayoutable

* Add styles property to further layout specs

* Adjust some examples

* Add `loadStyle` to create the style object in a ASLayoutable

* Revert "Add `loadStyle` to create the style object in a ASLayoutable"

This reverts commit 2b7240f2c7dc993e38cadf290cfdf08482dd70c7.

* Revert "Adjust some examples"

This reverts commit 3254ae0a321e75db3ecfa80adee9d96bde93a33d.

* Revert "Add styles property to further layout specs"

This reverts commit c779dcb876ead27122c1af1300146a6ad36912cb.

* Rename ASLayoutableStyleDeclaration to ASLayoutableStyle

* Add styleClass class property for extensibility support of the ASLayoutable style object

* flexShrink should not be YES by default
2016-09-22 16:00:52 -07:00

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//
// ASDisplayNodeLayoutTests.m
// AsyncDisplayKit
//
// Copyright (c) 2014-present, Facebook, Inc. All rights reserved.
// This source code is licensed under the BSD-style license found in the
// LICENSE file in the root directory of this source tree. An additional grant
// of patent rights can be found in the PATENTS file in the same directory.
//
#import "ASXCTExtensions.h"
#import <AsyncDisplayKit/AsyncDisplayKit.h>
#import "ASLayoutSpecSnapshotTestsHelper.h"
#import "ASDisplayNode+FrameworkPrivate.h"
@interface ASDisplayNodeLayoutTests : XCTestCase
@end
@implementation ASDisplayNodeLayoutTests
- (void)testMeasureOnLayoutIfNotHappenedBefore
{
CGSize nodeSize = CGSizeMake(100, 100);
ASDisplayNode *displayNode = [[ASDisplayNode alloc] init];
displayNode.style.width = ASDimensionMake(100);
displayNode.style.height = ASDimensionMake(100);
// Use a button node in here as ASButtonNode uses layoutSpecThatFits:
ASButtonNode *buttonNode = [ASButtonNode new];
[displayNode addSubnode:buttonNode];
displayNode.frame = {.size = nodeSize};
buttonNode.frame = {.size = nodeSize};
ASXCTAssertEqualSizes(displayNode.calculatedSize, CGSizeZero, @"Calculated size before measurement and layout should be 0");
ASXCTAssertEqualSizes(buttonNode.calculatedSize, CGSizeZero, @"Calculated size before measurement and layout should be 0");
// Trigger view creation and layout pass without a manual measure: call before so the automatic measurement
// pass will trigger in the layout pass
[displayNode.view layoutIfNeeded];
ASXCTAssertEqualSizes(displayNode.calculatedSize, nodeSize, @"Automatic measurement pass should have happened in layout pass");
ASXCTAssertEqualSizes(buttonNode.calculatedSize, nodeSize, @"Automatic measurement pass should have happened in layout pass");
}
#if DEBUG
- (void)testNotAllowAddingSubnodesInLayoutSpecThatFits
{
ASDisplayNode *displayNode = [ASDisplayNode new];
ASDisplayNode *someOtherNode = [ASDisplayNode new];
displayNode.layoutSpecBlock = ^(ASDisplayNode * _Nonnull node, ASSizeRange constrainedSize) {
[node addSubnode:someOtherNode];
return [ASInsetLayoutSpec insetLayoutSpecWithInsets:UIEdgeInsetsZero child:someOtherNode];
};
XCTAssertThrows([displayNode layoutThatFits:ASSizeRangeMake(CGSizeZero, CGSizeMake(100, 100))], @"Should throw if subnode was added in layoutSpecThatFits:");
}
- (void)testNotAllowModifyingSubnodesInLayoutSpecThatFits
{
ASDisplayNode *displayNode = [ASDisplayNode new];
ASDisplayNode *someOtherNode = [ASDisplayNode new];
[displayNode addSubnode:someOtherNode];
displayNode.layoutSpecBlock = ^(ASDisplayNode * _Nonnull node, ASSizeRange constrainedSize) {
[someOtherNode removeFromSupernode];
[node addSubnode:[ASDisplayNode new]];
return [ASInsetLayoutSpec insetLayoutSpecWithInsets:UIEdgeInsetsZero child:someOtherNode];
};
XCTAssertThrows([displayNode layoutThatFits:ASSizeRangeMake(CGSizeZero, CGSizeMake(100, 100))], @"Should throw if subnodes where modified in layoutSpecThatFits:");
}
#endif
- (void)testMeasureOnLayoutIfNotHappenedBeforeNoRemeasureForSameBounds
{
CGSize nodeSize = CGSizeMake(100, 100);
ASDisplayNode *displayNode = [ASDisplayNode new];
[displayNode.style setSizeWithCGSize:nodeSize];
ASButtonNode *buttonNode = [ASButtonNode new];
[displayNode addSubnode:buttonNode];
__block size_t numberOfLayoutSpecThatFitsCalls = 0;
displayNode.layoutSpecBlock = ^(ASDisplayNode * _Nonnull node, ASSizeRange constrainedSize) {
__sync_fetch_and_add(&numberOfLayoutSpecThatFitsCalls, 1);
return [ASInsetLayoutSpec insetLayoutSpecWithInsets:UIEdgeInsetsZero child:buttonNode];
};
displayNode.frame = {.size = nodeSize};
// Trigger initial layout pass without a measurement pass before
[displayNode.view layoutIfNeeded];
XCTAssertEqual(numberOfLayoutSpecThatFitsCalls, 1, @"Should measure during layout if not measured");
[displayNode layoutThatFits:ASSizeRangeMake(nodeSize, nodeSize)];
XCTAssertEqual(numberOfLayoutSpecThatFitsCalls, 1, @"Should not remeasure with same bounds");
}
@end