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ASTextKitTruncationTests.mm
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//
// ASTextKitTruncationTests.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 <UIKit/UIKit.h>
#import <XCTest/XCTest.h>
#import <AsyncDisplayKit/ASTextKitContext.h>
#if AS_ENABLE_TEXTNODE
#import <AsyncDisplayKit/ASTextKitTailTruncater.h>
@interface ASTextKitTruncationTests : XCTestCase
@end
@implementation ASTextKitTruncationTests
- (NSString *)_sentenceString
{
return @"90's cray photo booth tote bag bespoke Carles. Plaid wayfarers Odd Future master cleanse tattooed four dollar toast small batch kale chips leggings meh photo booth occupy irony.";
}
- (NSAttributedString *)_sentenceAttributedString
{
return [[NSAttributedString alloc] initWithString:[self _sentenceString] attributes:@{}];
}
- (NSAttributedString *)_simpleTruncationAttributedString
{
return [[NSAttributedString alloc] initWithString:@"..." attributes:@{}];
}
- (void)testEmptyTruncationStringSameAsStraightTextKitTailTruncation
{
CGSize constrainedSize = CGSizeMake(100, 50);
NSAttributedString *attributedString = [self _sentenceAttributedString];
ASTextKitContext *context = [[ASTextKitContext alloc] initWithAttributedString:attributedString
tintColor:nil
lineBreakMode:NSLineBreakByWordWrapping
maximumNumberOfLines:0
exclusionPaths:nil
constrainedSize:constrainedSize];
__block NSRange textKitVisibleRange;
[context performBlockWithLockedTextKitComponents:^(NSLayoutManager *layoutManager, NSTextStorage *textStorage, NSTextContainer *textContainer) {
textKitVisibleRange = [layoutManager characterRangeForGlyphRange:[layoutManager glyphRangeForTextContainer:textContainer]
actualGlyphRange:NULL];
}];
ASTextKitTailTruncater *tailTruncater = [[ASTextKitTailTruncater alloc] initWithContext:context
truncationAttributedString:nil
avoidTailTruncationSet:nil];
[tailTruncater truncate];
XCTAssert(NSEqualRanges(textKitVisibleRange, tailTruncater.visibleRanges[0]));
XCTAssert(NSEqualRanges(textKitVisibleRange, tailTruncater.firstVisibleRange));
}
- (void)testSimpleTailTruncation
{
CGSize constrainedSize = CGSizeMake(100, 60);
NSAttributedString *attributedString = [self _sentenceAttributedString];
ASTextKitContext *context = [[ASTextKitContext alloc] initWithAttributedString:attributedString
tintColor:nil
lineBreakMode:NSLineBreakByWordWrapping
maximumNumberOfLines:0
exclusionPaths:nil
constrainedSize:constrainedSize];
ASTextKitTailTruncater *tailTruncater = [[ASTextKitTailTruncater alloc] initWithContext:context
truncationAttributedString:[self _simpleTruncationAttributedString]
avoidTailTruncationSet:[NSCharacterSet characterSetWithCharactersInString:@""]];
[tailTruncater truncate];
__block NSString *drawnString;
[context performBlockWithLockedTextKitComponents:^(NSLayoutManager *layoutManager, NSTextStorage *textStorage, NSTextContainer *textContainer) {
drawnString = textStorage.string;
}];
NSString *expectedString = @"90's cray photo booth tote bag bespoke Carles. Plaid wayfarers...";
XCTAssertEqualObjects(expectedString, drawnString);
XCTAssert(NSEqualRanges(NSMakeRange(0, 62), tailTruncater.visibleRanges[0]));
XCTAssert(NSEqualRanges(NSMakeRange(0, 62), tailTruncater.firstVisibleRange));
}
- (void)testAvoidedCharTailWordBoundaryTruncation
{
CGSize constrainedSize = CGSizeMake(100, 50);
NSAttributedString *attributedString = [self _sentenceAttributedString];
ASTextKitContext *context = [[ASTextKitContext alloc] initWithAttributedString:attributedString
tintColor:nil
lineBreakMode:NSLineBreakByWordWrapping
maximumNumberOfLines:0
exclusionPaths:nil
constrainedSize:constrainedSize];
ASTextKitTailTruncater *tailTruncater = [[ASTextKitTailTruncater alloc] initWithContext:context
truncationAttributedString:[self _simpleTruncationAttributedString]
avoidTailTruncationSet:[NSCharacterSet characterSetWithCharactersInString:@"."]];
[tailTruncater truncate];
__block NSString *drawnString;
[context performBlockWithLockedTextKitComponents:^(NSLayoutManager *layoutManager, NSTextStorage *textStorage, NSTextContainer *textContainer) {
drawnString = textStorage.string;
}];
// This should have removed the additional "." in the string right after Carles.
NSString *expectedString = @"90's cray photo booth tote bag bespoke Carles...";
XCTAssertEqualObjects(expectedString, drawnString);
}
- (void)testAvoidedCharTailCharBoundaryTruncation
{
CGSize constrainedSize = CGSizeMake(50, 50);
NSAttributedString *attributedString = [self _sentenceAttributedString];
ASTextKitContext *context = [[ASTextKitContext alloc] initWithAttributedString:attributedString
tintColor:nil
lineBreakMode:NSLineBreakByCharWrapping
maximumNumberOfLines:0
exclusionPaths:nil
constrainedSize:constrainedSize];
ASTextKitTailTruncater *tailTruncater = [[ASTextKitTailTruncater alloc] initWithContext:context
truncationAttributedString:[self _simpleTruncationAttributedString]
avoidTailTruncationSet:[NSCharacterSet characterSetWithCharactersInString:@"."]];
[tailTruncater truncate];
__block NSString *drawnString;
[context performBlockWithLockedTextKitComponents:^(NSLayoutManager *layoutManager, NSTextStorage *textStorage, NSTextContainer *textContainer) {
drawnString = textStorage.string;
}];
// This should have removed the additional "." in the string right after Carles.
NSString *expectedString = @"90's cray photo booth t...";
XCTAssertEqualObjects(expectedString, drawnString);
}
- (void)testHandleZeroSizeConstrainedSize
{
CGSize constrainedSize = CGSizeZero;
NSAttributedString *attributedString = [self _sentenceAttributedString];
ASTextKitContext *context = [[ASTextKitContext alloc] initWithAttributedString:attributedString
tintColor:nil
lineBreakMode:NSLineBreakByWordWrapping
maximumNumberOfLines:0
exclusionPaths:nil
constrainedSize:constrainedSize];
ASTextKitTailTruncater *tailTruncater = [[ASTextKitTailTruncater alloc] initWithContext:context
truncationAttributedString:[self _simpleTruncationAttributedString]
avoidTailTruncationSet:nil];
XCTAssertNoThrow([tailTruncater truncate]);
XCTAssert(tailTruncater.visibleRanges.size() == 0);
NSEqualRanges(NSMakeRange(0, 0), tailTruncater.firstVisibleRange);
}
- (void)testHandleZeroHeightConstrainedSize
{
CGSize constrainedSize = CGSizeMake(50, 0);
NSAttributedString *attributedString = [self _sentenceAttributedString];
ASTextKitContext *context = [[ASTextKitContext alloc] initWithAttributedString:attributedString
tintColor:nil
lineBreakMode:NSLineBreakByCharWrapping
maximumNumberOfLines:0
exclusionPaths:nil
constrainedSize:constrainedSize];
ASTextKitTailTruncater *tailTruncater = [[ASTextKitTailTruncater alloc] initWithContext:context
truncationAttributedString:[self _simpleTruncationAttributedString]
avoidTailTruncationSet:[NSCharacterSet characterSetWithCharactersInString:@"."]];
XCTAssertNoThrow([tailTruncater truncate]);
}
@end
#endif