IGListKit/Tests/IGListDebuggerTests.m

/*
 * Copyright (c) Meta Platforms, Inc. and affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 */

#import <XCTest/XCTest.h>

#import <IGListKit/IGListKit.h>

#import "IGListDebugger.h"
#import "IGListTestAdapterDataSource.h"

@interface IGListDebuggerTests : XCTestCase

@end

@implementation IGListDebuggerTests

- (void)test_whenSearchingAdapterInstances_thatCorrectCountReturned {
    // purge any leftover tracking
    [IGListDebugger clear];

    UIViewController *controller = [UIViewController new];
    UICollectionView *collectionView = [[UICollectionView alloc] initWithFrame:CGRectMake(0, 0, 320, 480)
                                                          collectionViewLayout:[UICollectionViewFlowLayout new]];

    IGListTestAdapterDataSource *dataSource = [IGListTestAdapterDataSource new];
    dataSource.objects = @[@1, @2, @3];
    IGListAdapter *adapter1 = [[IGListAdapter alloc] initWithUpdater:[IGListAdapterUpdater new] viewController:nil workingRangeSize:0];
    adapter1.collectionView = collectionView;
    adapter1.dataSource = dataSource;

    IGListAdapter *adapter2 = [[IGListAdapter alloc] initWithUpdater:[IGListAdapterUpdater new] viewController:controller workingRangeSize:2];
    adapter2.collectionView = collectionView;
    adapter2.dataSource = dataSource;

    IGListAdapter *adapter3 = [[IGListAdapter alloc] initWithUpdater:[IGListAdapterUpdater new] viewController:controller workingRangeSize:2];
    adapter3.collectionView = collectionView;
    adapter3.dataSource = dataSource;

    [collectionView setNeedsLayout];
    [collectionView layoutIfNeeded];

    NSArray *descriptions = [IGListDebugger adapterDescriptions];
    XCTAssertEqual(descriptions.count, 3);
    XCTAssertTrue([[IGListDebugger dump] length] > 0);
}

@end