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Merge pull request #1802 from facebook/AHThrashTesting
[Unit Tests] Add Table View Data Thrash Testing
This commit is contained in:
Adlai Holler
GitHub
562
AsyncDisplayKitTests/ASTableViewThrashTests.m
Normal file
562
AsyncDisplayKitTests/ASTableViewThrashTests.m
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@@ -0,0 +1,562 @@
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//
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// ASTableViewThrashTests.m
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// AsyncDisplayKit
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//
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// Created by Adlai Holler on 6/21/16.
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// Copyright © 2016 Facebook. All rights reserved.
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//
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@import XCTest;
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#import <AsyncDisplayKit/AsyncDisplayKit.h>
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// Set to 1 to use UITableView and see if the issue still exists.
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#define USE_UIKIT_REFERENCE 0
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#if USE_UIKIT_REFERENCE
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#define TableView UITableView
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#define kCellReuseID @"ASThrashTestCellReuseID"
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#else
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#define TableView ASTableView
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#endif
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#define kInitialSectionCount 20
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#define kInitialItemCount 20
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#define kMinimumItemCount 5
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#define kMinimumSectionCount 3
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#define kFickleness 0.1
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#define kThrashingIterationCount 100
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static NSString *ASThrashArrayDescription(NSArray *array) {
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NSMutableString *str = [NSMutableString stringWithString:@"(\n"];
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NSInteger i = 0;
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for (id obj in array) {
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[str appendFormat:@"\t[%ld]: \"%@\",\n", i, obj];
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i += 1;
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}
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[str appendString:@")"];
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return str;
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}
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static volatile int32_t ASThrashTestItemNextID = 1;
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@interface ASThrashTestItem: NSObject <NSSecureCoding>
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@property (nonatomic, readonly) NSInteger itemID;
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- (CGFloat)rowHeight;
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@end
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@implementation ASThrashTestItem
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+ (BOOL)supportsSecureCoding {
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return YES;
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}
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- (instancetype)init {
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self = [super init];
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if (self != nil) {
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_itemID = OSAtomicIncrement32(&ASThrashTestItemNextID);
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}
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return self;
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}
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- (instancetype)initWithCoder:(NSCoder *)aDecoder {
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self = [super init];
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if (self != nil) {
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_itemID = [aDecoder decodeIntegerForKey:@"itemID"];
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NSAssert(_itemID > 0, @"Failed to decode %@", self);
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}
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return self;
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}
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- (void)encodeWithCoder:(NSCoder *)aCoder {
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[aCoder encodeInteger:_itemID forKey:@"itemID"];
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}
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+ (NSMutableArray <ASThrashTestItem *> *)itemsWithCount:(NSInteger)count {
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NSMutableArray *result = [NSMutableArray arrayWithCapacity:count];
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for (NSInteger i = 0; i < count; i += 1) {
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[result addObject:[[ASThrashTestItem alloc] init]];
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}
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return result;
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}
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- (CGFloat)rowHeight {
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return (self.itemID % 400) ?: 44;
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}
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- (NSString *)description {
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return [NSString stringWithFormat:@"<Item %lu>", (unsigned long)_itemID];
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}
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@end
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@interface ASThrashTestSection: NSObject <NSCopying, NSSecureCoding>
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@property (nonatomic, strong, readonly) NSMutableArray *items;
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@property (nonatomic, readonly) NSInteger sectionID;
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- (CGFloat)headerHeight;
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@end
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static volatile int32_t ASThrashTestSectionNextID = 1;
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@implementation ASThrashTestSection
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/// Create an array of sections with the given count
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+ (NSMutableArray <ASThrashTestSection *> *)sectionsWithCount:(NSInteger)count {
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NSMutableArray *result = [NSMutableArray arrayWithCapacity:count];
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for (NSInteger i = 0; i < count; i += 1) {
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[result addObject:[[ASThrashTestSection alloc] initWithCount:kInitialItemCount]];
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}
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return result;
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}
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- (instancetype)initWithCount:(NSInteger)count {
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self = [super init];
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if (self != nil) {
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_sectionID = OSAtomicIncrement32(&ASThrashTestSectionNextID);
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_items = [ASThrashTestItem itemsWithCount:count];
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}
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return self;
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}
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- (instancetype)init {
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return [self initWithCount:0];
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}
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- (instancetype)initWithCoder:(NSCoder *)aDecoder {
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self = [super init];
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if (self != nil) {
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_items = [aDecoder decodeObjectOfClass:[NSArray class] forKey:@"items"];
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_sectionID = [aDecoder decodeIntegerForKey:@"sectionID"];
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NSAssert(_sectionID > 0, @"Failed to decode %@", self);
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}
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return self;
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}
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+ (BOOL)supportsSecureCoding {
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return YES;
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}
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- (void)encodeWithCoder:(NSCoder *)aCoder {
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[aCoder encodeObject:_items forKey:@"items"];
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[aCoder encodeInteger:_sectionID forKey:@"sectionID"];
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}
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- (CGFloat)headerHeight {
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return self.sectionID % 400 ?: 44;
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}
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- (NSString *)description {
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return [NSString stringWithFormat:@"<Section %lu: itemCount=%lu>", (unsigned long)_sectionID, (unsigned long)self.items.count];
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}
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- (id)copyWithZone:(NSZone *)zone {
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ASThrashTestSection *copy = [[ASThrashTestSection alloc] init];
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copy->_sectionID = _sectionID;
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copy->_items = [_items mutableCopy];
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return copy;
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}
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- (BOOL)isEqual:(id)object {
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if ([object isKindOfClass:[ASThrashTestSection class]]) {
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return [(ASThrashTestSection *)object sectionID] == _sectionID;
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} else {
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return NO;
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}
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}
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@end
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#if !USE_UIKIT_REFERENCE
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@interface ASThrashTestNode: ASCellNode
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@property (nonatomic, strong) ASThrashTestItem *item;
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@end
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@implementation ASThrashTestNode
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@end
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#endif
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@interface ASThrashDataSource: NSObject
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#if USE_UIKIT_REFERENCE
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<UITableViewDataSource, UITableViewDelegate>
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#else
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<ASTableDataSource, ASTableDelegate>
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#endif
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@property (nonatomic, strong, readonly) UIWindow *window;
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@property (nonatomic, strong, readonly) TableView *tableView;
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@property (nonatomic, strong) NSArray <ASThrashTestSection *> *data;
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@end
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@implementation ASThrashDataSource
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- (instancetype)initWithData:(NSArray <ASThrashTestSection *> *)data {
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self = [super init];
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if (self != nil) {
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_data = [[NSArray alloc] initWithArray:data copyItems:YES];
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_window = [[UIWindow alloc] initWithFrame:[UIScreen mainScreen].bounds];
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_tableView = [[TableView alloc] initWithFrame:_window.bounds style:UITableViewStylePlain];
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[_window addSubview:_tableView];
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#if USE_UIKIT_REFERENCE
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_tableView.dataSource = self;
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_tableView.delegate = self;
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[_tableView registerClass:[UITableViewCell class] forCellReuseIdentifier:kCellReuseID];
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#else
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_tableView.asyncDelegate = self;
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_tableView.asyncDataSource = self;
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[_tableView reloadDataImmediately];
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#endif
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[_tableView layoutIfNeeded];
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}
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return self;
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}
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- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
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return self.data[section].items.count;
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}
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- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
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return self.data.count;
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}
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- (CGFloat)tableView:(UITableView *)tableView heightForHeaderInSection:(NSInteger)section {
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return self.data[section].headerHeight;
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}
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#if USE_UIKIT_REFERENCE
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- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
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return [tableView dequeueReusableCellWithIdentifier:kCellReuseID forIndexPath:indexPath];
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}
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- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath {
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ASThrashTestItem *item = self.data[indexPath.section].items[indexPath.item];
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return item.rowHeight;
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}
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#else
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- (ASCellNodeBlock)tableView:(ASTableView *)tableView nodeBlockForRowAtIndexPath:(NSIndexPath *)indexPath {
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ASThrashTestItem *item = self.data[indexPath.section].items[indexPath.item];
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return ^{
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ASThrashTestNode *node = [[ASThrashTestNode alloc] init];
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node.item = item;
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return node;
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};
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}
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#endif
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@end
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@implementation NSIndexSet (ASThrashHelpers)
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- (NSArray <NSIndexPath *> *)indexPathsInSection:(NSInteger)section {
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NSMutableArray *result = [NSMutableArray arrayWithCapacity:self.count];
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[self enumerateIndexesUsingBlock:^(NSUInteger idx, BOOL * _Nonnull stop) {
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[result addObject:[NSIndexPath indexPathForItem:idx inSection:section]];
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}];
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return result;
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}
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/// `insertMode` means that for each index selected, the max goes up by one.
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+ (NSMutableIndexSet *)randomIndexesLessThan:(NSInteger)max probability:(float)probability insertMode:(BOOL)insertMode {
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NSMutableIndexSet *indexes = [[NSMutableIndexSet alloc] init];
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u_int32_t cutoff = probability * 100;
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for (NSInteger i = 0; i < max; i++) {
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if (arc4random_uniform(100) < cutoff) {
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[indexes addIndex:i];
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if (insertMode) {
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max += 1;
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}
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}
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}
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return indexes;
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}
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@end
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static NSInteger ASThrashUpdateCurrentSerializationVersion = 1;
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@interface ASThrashUpdate : NSObject <NSSecureCoding>
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@property (nonatomic, strong, readonly) NSArray<ASThrashTestSection *> *oldData;
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@property (nonatomic, strong, readonly) NSMutableArray<ASThrashTestSection *> *data;
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@property (nonatomic, strong, readonly) NSMutableIndexSet *deletedSectionIndexes;
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@property (nonatomic, strong, readonly) NSMutableIndexSet *replacedSectionIndexes;
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/// The sections used to replace the replaced sections.
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@property (nonatomic, strong, readonly) NSMutableArray<ASThrashTestSection *> *replacingSections;
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@property (nonatomic, strong, readonly) NSMutableIndexSet *insertedSectionIndexes;
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@property (nonatomic, strong, readonly) NSMutableArray<ASThrashTestSection *> *insertedSections;
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@property (nonatomic, strong, readonly) NSMutableArray<NSMutableIndexSet *> *deletedItemIndexes;
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@property (nonatomic, strong, readonly) NSMutableArray<NSMutableIndexSet *> *replacedItemIndexes;
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/// The items used to replace the replaced items.
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@property (nonatomic, strong, readonly) NSMutableArray<NSArray <ASThrashTestItem *> *> *replacingItems;
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@property (nonatomic, strong, readonly) NSMutableArray<NSMutableIndexSet *> *insertedItemIndexes;
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@property (nonatomic, strong, readonly) NSMutableArray<NSArray <ASThrashTestItem *> *> *insertedItems;
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- (instancetype)initWithData:(NSArray<ASThrashTestSection *> *)data;
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+ (ASThrashUpdate *)thrashUpdateWithBase64String:(NSString *)base64;
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- (NSString *)base64Representation;
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@end
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@implementation ASThrashUpdate
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- (instancetype)initWithData:(NSArray<ASThrashTestSection *> *)data {
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self = [super init];
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if (self != nil) {
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_data = [[NSMutableArray alloc] initWithArray:data copyItems:YES];
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_oldData = [[NSArray alloc] initWithArray:data copyItems:YES];
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_deletedItemIndexes = [NSMutableArray array];
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_replacedItemIndexes = [NSMutableArray array];
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_insertedItemIndexes = [NSMutableArray array];
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_replacingItems = [NSMutableArray array];
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_insertedItems = [NSMutableArray array];
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// Randomly reload some items
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for (ASThrashTestSection *section in _data) {
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NSMutableIndexSet *indexes = [NSIndexSet randomIndexesLessThan:section.items.count probability:kFickleness insertMode:NO];
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NSArray *newItems = [ASThrashTestItem itemsWithCount:indexes.count];
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[section.items replaceObjectsAtIndexes:indexes withObjects:newItems];
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[_replacingItems addObject:newItems];
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[_replacedItemIndexes addObject:indexes];
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}
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// Randomly replace some sections
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_replacedSectionIndexes = [NSIndexSet randomIndexesLessThan:_data.count probability:kFickleness insertMode:NO];
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_replacingSections = [ASThrashTestSection sectionsWithCount:_replacedSectionIndexes.count];
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[_data replaceObjectsAtIndexes:_replacedSectionIndexes withObjects:_replacingSections];
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// Randomly delete some items
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[_data enumerateObjectsUsingBlock:^(ASThrashTestSection * _Nonnull section, NSUInteger idx, BOOL * _Nonnull stop) {
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if (section.items.count >= kMinimumItemCount) {
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NSMutableIndexSet *indexes = [NSIndexSet randomIndexesLessThan:section.items.count probability:kFickleness insertMode:NO];
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/// Cannot reload & delete the same item.
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[indexes removeIndexes:_replacedItemIndexes[idx]];
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[section.items removeObjectsAtIndexes:indexes];
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[_deletedItemIndexes addObject:indexes];
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} else {
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[_deletedItemIndexes addObject:[NSMutableIndexSet indexSet]];
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}
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}];
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// Randomly delete some sections
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if (_data.count >= kMinimumSectionCount) {
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_deletedSectionIndexes = [NSIndexSet randomIndexesLessThan:_data.count probability:kFickleness insertMode:NO];
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} else {
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_deletedSectionIndexes = [NSMutableIndexSet indexSet];
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}
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// Cannot replace & delete the same section.
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[_deletedSectionIndexes removeIndexes:_replacedSectionIndexes];
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// Cannot delete/replace item in deleted/replaced section
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[_deletedSectionIndexes enumerateIndexesUsingBlock:^(NSUInteger idx, BOOL * _Nonnull stop) {
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[_replacedItemIndexes[idx] removeAllIndexes];
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[_deletedItemIndexes[idx] removeAllIndexes];
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}];
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[_replacedSectionIndexes enumerateIndexesUsingBlock:^(NSUInteger idx, BOOL * _Nonnull stop) {
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[_replacedItemIndexes[idx] removeAllIndexes];
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[_deletedItemIndexes[idx] removeAllIndexes];
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}];
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[_data removeObjectsAtIndexes:_deletedSectionIndexes];
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// Randomly insert some sections
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_insertedSectionIndexes = [NSIndexSet randomIndexesLessThan:(_data.count + 1) probability:kFickleness insertMode:YES];
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_insertedSections = [ASThrashTestSection sectionsWithCount:_insertedSectionIndexes.count];
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[_data insertObjects:_insertedSections atIndexes:_insertedSectionIndexes];
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// Randomly insert some items
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for (ASThrashTestSection *section in _data) {
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// Only insert items into the old sections – not replaced/inserted sections.
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if ([_oldData containsObject:section]) {
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NSMutableIndexSet *indexes = [NSIndexSet randomIndexesLessThan:(section.items.count + 1) probability:kFickleness insertMode:YES];
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NSArray *newItems = [ASThrashTestItem itemsWithCount:indexes.count];
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[section.items insertObjects:newItems atIndexes:indexes];
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[_insertedItems addObject:newItems];
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[_insertedItemIndexes addObject:indexes];
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} else {
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[_insertedItems addObject:@[]];
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[_insertedItemIndexes addObject:[NSMutableIndexSet indexSet]];
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}
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}
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}
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return self;
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}
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+ (BOOL)supportsSecureCoding {
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return YES;
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}
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+ (ASThrashUpdate *)thrashUpdateWithBase64String:(NSString *)base64 {
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return [NSKeyedUnarchiver unarchiveObjectWithData:[[NSData alloc] initWithBase64EncodedString:base64 options:kNilOptions]];
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}
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- (NSString *)base64Representation {
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return [[NSKeyedArchiver archivedDataWithRootObject:self] base64EncodedStringWithOptions:kNilOptions];
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}
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- (void)encodeWithCoder:(NSCoder *)aCoder {
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NSDictionary *dict = [self dictionaryWithValuesForKeys:@[
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@"oldData",
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@"data",
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@"deletedSectionIndexes",
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@"replacedSectionIndexes",
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@"replacingSections",
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@"insertedSectionIndexes",
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@"insertedSections",
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@"deletedItemIndexes",
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@"replacedItemIndexes",
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@"replacingItems",
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@"insertedItemIndexes",
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@"insertedItems"
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]];
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[aCoder encodeObject:dict forKey:@"_dict"];
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[aCoder encodeInteger:ASThrashUpdateCurrentSerializationVersion forKey:@"_version"];
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}
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- (instancetype)initWithCoder:(NSCoder *)aDecoder {
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self = [super init];
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if (self != nil) {
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NSAssert(ASThrashUpdateCurrentSerializationVersion == [aDecoder decodeIntegerForKey:@"_version"], @"This thrash update was archived from a different version and can't be read. Sorry.");
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NSDictionary *dict = [aDecoder decodeObjectOfClass:[NSDictionary class] forKey:@"_dict"];
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[self setValuesForKeysWithDictionary:dict];
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}
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return self;
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}
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- (NSString *)description {
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return [NSString stringWithFormat:@"<ASThrashUpdate %p:\nOld data: %@\nDeleted items: %@\nDeleted sections: %@\nReplaced items: %@\nReplaced sections: %@\nInserted items: %@\nInserted sections: %@\nNew data: %@>", self, ASThrashArrayDescription(_oldData), ASThrashArrayDescription(_deletedItemIndexes), _deletedSectionIndexes, ASThrashArrayDescription(_replacedItemIndexes), _replacedSectionIndexes, ASThrashArrayDescription(_insertedItemIndexes), _insertedSectionIndexes, ASThrashArrayDescription(_data)];
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}
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- (NSString *)logFriendlyBase64Representation {
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return [NSString stringWithFormat:@"\n\n**********\nBase64 Representation:\n**********\n%@\n**********\nEnd Base64 Representation\n**********", self.base64Representation];
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}
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@end
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@interface ASTableViewThrashTests: XCTestCase
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@end
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@implementation ASTableViewThrashTests {
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// The current update, which will be logged in case of a failure.
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ASThrashUpdate *_update;
|
||||
}
|
||||
|
||||
#pragma mark Overrides
|
||||
|
||||
- (void)tearDown {
|
||||
_update = nil;
|
||||
}
|
||||
|
||||
// NOTE: Despite the documentation, this is not always called if an exception is caught.
|
||||
- (void)recordFailureWithDescription:(NSString *)description inFile:(NSString *)filePath atLine:(NSUInteger)lineNumber expected:(BOOL)expected {
|
||||
[self logCurrentUpdateIfNeeded];
|
||||
[super recordFailureWithDescription:description inFile:filePath atLine:lineNumber expected:expected];
|
||||
}
|
||||
|
||||
#pragma mark Test Methods
|
||||
|
||||
- (void)testInitialDataRead {
|
||||
ASThrashDataSource *ds = [[ASThrashDataSource alloc] initWithData:[ASThrashTestSection sectionsWithCount:kInitialSectionCount]];
|
||||
[self verifyDataSource:ds];
|
||||
}
|
||||
|
||||
/// Replays the Base64 representation of an ASThrashUpdate from "ASThrashTestRecordedCase" file
|
||||
- (void)DISABLED_testRecordedThrashCase {
|
||||
NSURL *caseURL = [[NSBundle bundleForClass:[self class]] URLForResource:@"ASThrashTestRecordedCase" withExtension:nil subdirectory:@"TestResources"];
|
||||
NSString *base64 = [NSString stringWithContentsOfURL:caseURL encoding:NSUTF8StringEncoding error:NULL];
|
||||
|
||||
_update = [ASThrashUpdate thrashUpdateWithBase64String:base64];
|
||||
if (_update == nil) {
|
||||
return;
|
||||
}
|
||||
|
||||
ASThrashDataSource *ds = [[ASThrashDataSource alloc] initWithData:_update.oldData];
|
||||
[self applyUpdate:_update toDataSource:ds];
|
||||
[self verifyDataSource:ds];
|
||||
}
|
||||
|
||||
- (void)DISABLED_testThrashingWildly {
|
||||
for (NSInteger i = 0; i < kThrashingIterationCount; i++) {
|
||||
[self setUp];
|
||||
ASThrashDataSource *ds = [[ASThrashDataSource alloc] initWithData:[ASThrashTestSection sectionsWithCount:kInitialSectionCount]];
|
||||
_update = [[ASThrashUpdate alloc] initWithData:ds.data];
|
||||
|
||||
[self applyUpdate:_update toDataSource:ds];
|
||||
[self verifyDataSource:ds];
|
||||
[self tearDown];
|
||||
}
|
||||
}
|
||||
|
||||
#pragma mark Helpers
|
||||
|
||||
- (void)logCurrentUpdateIfNeeded {
|
||||
if (_update != nil) {
|
||||
NSLog(@"Failed update %@: %@", _update, _update.logFriendlyBase64Representation);
|
||||
}
|
||||
}
|
||||
|
||||
- (void)applyUpdate:(ASThrashUpdate *)update toDataSource:(ASThrashDataSource *)dataSource {
|
||||
TableView *tableView = dataSource.tableView;
|
||||
|
||||
[tableView beginUpdates];
|
||||
dataSource.data = update.data;
|
||||
|
||||
[tableView insertSections:update.insertedSectionIndexes withRowAnimation:UITableViewRowAnimationNone];
|
||||
|
||||
[tableView deleteSections:update.deletedSectionIndexes withRowAnimation:UITableViewRowAnimationNone];
|
||||
|
||||
[tableView reloadSections:update.replacedSectionIndexes withRowAnimation:UITableViewRowAnimationNone];
|
||||
|
||||
[update.insertedItemIndexes enumerateObjectsUsingBlock:^(NSMutableIndexSet * _Nonnull indexes, NSUInteger idx, BOOL * _Nonnull stop) {
|
||||
NSArray *indexPaths = [indexes indexPathsInSection:idx];
|
||||
[tableView insertRowsAtIndexPaths:indexPaths withRowAnimation:UITableViewRowAnimationNone];
|
||||
}];
|
||||
|
||||
[update.deletedItemIndexes enumerateObjectsUsingBlock:^(NSMutableIndexSet * _Nonnull indexes, NSUInteger sec, BOOL * _Nonnull stop) {
|
||||
NSArray *indexPaths = [indexes indexPathsInSection:sec];
|
||||
[tableView deleteRowsAtIndexPaths:indexPaths withRowAnimation:UITableViewRowAnimationNone];
|
||||
}];
|
||||
|
||||
[update.replacedItemIndexes enumerateObjectsUsingBlock:^(NSMutableIndexSet * _Nonnull indexes, NSUInteger sec, BOOL * _Nonnull stop) {
|
||||
NSArray *indexPaths = [indexes indexPathsInSection:sec];
|
||||
[tableView reloadRowsAtIndexPaths:indexPaths withRowAnimation:UITableViewRowAnimationNone];
|
||||
}];
|
||||
@try {
|
||||
[tableView endUpdates];
|
||||
#if !USE_UIKIT_REFERENCE
|
||||
[tableView waitUntilAllUpdatesAreCommitted];
|
||||
#endif
|
||||
} @catch (NSException *exception) {
|
||||
[self logCurrentUpdateIfNeeded];
|
||||
@throw exception;
|
||||
}
|
||||
}
|
||||
|
||||
- (void)verifyDataSource:(ASThrashDataSource *)ds {
|
||||
TableView *tableView = ds.tableView;
|
||||
NSArray <ASThrashTestSection *> *data = [ds data];
|
||||
XCTAssertEqual(data.count, tableView.numberOfSections);
|
||||
for (NSInteger i = 0; i < tableView.numberOfSections; i++) {
|
||||
XCTAssertEqual([tableView numberOfRowsInSection:i], data[i].items.count);
|
||||
XCTAssertEqual([tableView rectForHeaderInSection:i].size.height, data[i].headerHeight);
|
||||
|
||||
for (NSInteger j = 0; j < [tableView numberOfRowsInSection:i]; j++) {
|
||||
NSIndexPath *indexPath = [NSIndexPath indexPathForItem:j inSection:i];
|
||||
ASThrashTestItem *item = data[i].items[j];
|
||||
#if USE_UIKIT_REFERENCE
|
||||
XCTAssertEqual([tableView rectForRowAtIndexPath:indexPath].size.height, item.rowHeight);
|
||||
#else
|
||||
ASThrashTestNode *node = (ASThrashTestNode *)[tableView nodeForRowAtIndexPath:indexPath];
|
||||
XCTAssertEqual(node.item, item);
|
||||
#endif
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
@end
|
||||
File diff suppressed because one or more lines are too long
Reference in New Issue
Block a user