Tools/TestWebKitAPI/Tests/WebKitCocoa/ElementFullscreenIntersectionObserver.mm

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#import "config.h"

#import "PlatformUtilities.h"
#import "TestElementFullscreenDelegate.h"
#import "TestWKWebView.h"
#import <WebKit/WKWebViewPrivate.h>
#import <WebKit/WebKit.h>

TEST(ElementFullscreen, IntersectionObserver)
{
    // This test must run in TestWebKitAPI.app
    if (![NSBundle.mainBundle.bundleIdentifier isEqualToString:@"org.webkit.TestWebKitAPI"])
        return;

    RetainPtr configuration = adoptNS([[WKWebViewConfiguration alloc] init]);
    [configuration preferences].elementFullscreenEnabled = YES;
    RetainPtr fullscreenDelegate = adoptNS([[TestElementFullscreenDelegate alloc] init]);
    RetainPtr webView = adoptNS([[TestWKWebView alloc] initWithFrame:NSMakeRect(0, 0, 800, 600) configuration:configuration.get()]);
    [webView _setFullscreenDelegate:fullscreenDelegate.get()];

    [webView synchronouslyLoadHTMLString:
        @"<div style=\"height: 300%\"><div id=target style=\"height: 50%\"; }</div>"
        "<script>"
        "let observer = new IntersectionObserver(entries => { entries.forEach(entry => {"
        "    let log = target.appendChild(document.createElement('div'));"
        "    log.innerText = `intersecting(${entry.isIntersecting});"
        "};"
        "target.scrollIntoView();"
        "</script>"];

    [webView evaluateJavaScript:@"target.requestFullscreen()" completionHandler:nil];
    [fullscreenDelegate waitForDidEnterElementFullscreen];

    auto contents = [webView stringByEvaluatingJavaScript:@"target.innerText"];
    EXPECT_STREQ(contents.UTF8String, "intersecting(true)");
}