Tools/TestWebKitAPI/Tests/WebKitCocoa/RestoreScrollPosition.mm

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#import "config.h"

#import "PlatformUtilities.h"
#import "Test.h"
#import "TestWKWebView.h"
#import <WebKit/WKProcessPoolPrivate.h>
#import <WebKit/WKWebViewPrivate.h>
#import <WebKit/_WKProcessPoolConfiguration.h>

namespace TestWebKitAPI {

#if PLATFORM(IOS_FAMILY)

TEST(WebKit, RestoreScrollPositionDuringResize)
{
    auto processPoolConfiguration = adoptNS([[_WKProcessPoolConfiguration alloc] init]);
    processPoolConfiguration.get().pageCacheEnabled = NO;
    auto processPool = adoptNS([[WKProcessPool alloc] _initWithConfiguration:processPoolConfiguration.get()]);

    auto webViewConfiguration = adoptNS([[WKWebViewConfiguration alloc] init]);
    [webViewConfiguration setProcessPool:processPool.get()];
    auto webView = adoptNS([[TestWKWebView alloc] initWithFrame:CGRectMake(0, 0, 320, 500) configuration:webViewConfiguration.get()]);
    [webView synchronouslyLoadTestPageNamed:@"simple-tall"];
    [webView stringByEvaluatingJavaScript:@"scrollTo(0, 1000)"];
    [webView waitForNextPresentationUpdate];

    CGPoint contentOffsetAfterScrolling = [webView scrollView].contentOffset;
    EXPECT_EQ(0, contentOffsetAfterScrolling.x);
    EXPECT_EQ(1000, contentOffsetAfterScrolling.y);

    [webView synchronouslyLoadTestPageNamed:@"simple"];
    [webView waitForNextPresentationUpdate];

    contentOffsetAfterScrolling = [webView scrollView].contentOffset;
    EXPECT_EQ(0, contentOffsetAfterScrolling.x);
    EXPECT_EQ(0, contentOffsetAfterScrolling.y);

    [webView _beginAnimatedResizeWithUpdates:^{
        [webView setFrame:CGRectMake(0, 0, [webView frame].size.width + 100, 500)];
    }];
    [webView synchronouslyGoBack];

    TestWebKitAPI::Util::sleep(0.5);
    [webView _endAnimatedResize];

    // Should restore the scroll position.
    int timeout = 0;
    do {
        if (timeout)
            TestWebKitAPI::Util::sleep(0.1);
    } while ([webView scrollView].contentOffset.y != 1000 && ++timeout <= 30);

    contentOffsetAfterScrolling = [webView scrollView].contentOffset;
    EXPECT_EQ(0, contentOffsetAfterScrolling.x);
    EXPECT_EQ(1000, contentOffsetAfterScrolling.y);
}

#endif

}