Tools/TestWebKitAPI/Tests/ios/FocusPreservationTests.mm

/*
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#import "config.h"
#import "Test.h"

#if PLATFORM(IOS_FAMILY)

#import "PlatformUtilities.h"
#import "TestInputDelegate.h"
#import "TestWKWebView.h"
#import "UIKitSPI.h"
#import <WebKit/WKWebViewPrivate.h>
#import <WebKit/WKWebViewPrivateForTesting.h>
#import <WebKit/_WKInputDelegate.h>
#import <wtf/BlockPtr.h>

static std::pair<RetainPtr<TestWKWebView>, RetainPtr<TestInputDelegate>> webViewForTestingFocusPreservation(void(^focusHandler)(id <_WKFocusedElementInfo>))
{
    auto inputDelegate = adoptNS([[TestInputDelegate alloc] init]);
    [inputDelegate setFocusStartsInputSessionPolicyHandler:[&, focusHandler = makeBlockPtr(focusHandler)] (WKWebView *, id<_WKFocusedElementInfo> info) {
        focusHandler(info);
        return _WKFocusStartsInputSessionPolicyAllow;
    }];

    auto webView = adoptNS([[TestWKWebView alloc] initWithFrame:CGRectMake(0, 0, 320, 500)]);
    [webView _setInputDelegate:inputDelegate.get()];
    [webView synchronouslyLoadHTMLString:@"<input></input><select><option selected>foo</option><option>bar</option></select>"];
    return { webView, inputDelegate };
}

namespace TestWebKitAPI {

TEST(FocusPreservationTests, PreserveAndRestoreFocus)
{
    bool inputFocused = false;
    auto webViewAndDelegate = webViewForTestingFocusPreservation([&inputFocused] (id <_WKFocusedElementInfo> info) {
        inputFocused = true;
    });

    TestWKWebView *webView = webViewAndDelegate.first.get();
    [webView evaluateJavaScript:@"document.querySelector('input').focus()" completionHandler:nil];
    Util::run(&inputFocused);

    NSUUID *focusToken = NSUUID.UUID;
    [webView.textInputContentView _preserveFocusWithToken:focusToken destructively:YES];

    EXPECT_TRUE([webView resignFirstResponder]);
    EXPECT_TRUE([webView stringByEvaluatingJavaScript:@"document.activeElement == document.querySelector('input')"].boolValue);

    [webView.textInputContentView _restoreFocusWithToken:focusToken];
    EXPECT_TRUE([webView becomeFirstResponder]);
}

TEST(FocusPreservationTests, ChangingFocusedNodeResetsFocusPreservationState)
{
    bool inputFocused = false;
    bool selectFocused = false;
    auto webViewAndDelegate = webViewForTestingFocusPreservation([&inputFocused, &selectFocused] (id <_WKFocusedElementInfo> info) {
        if (info.type == WKInputTypeSelect)
            selectFocused = true;
        else
            inputFocused = true;
    });

    TestWKWebView *webView = webViewAndDelegate.first.get();
    [webView evaluateJavaScript:@"document.querySelector('input').focus()" completionHandler:nil];
    Util::run(&inputFocused);

    NSUUID *focusToken = NSUUID.UUID;
    [webView.textInputContentView _preserveFocusWithToken:focusToken destructively:YES];

    [webView evaluateJavaScript:@"document.querySelector('select').focus()" completionHandler:nil];
    Util::run(&selectFocused);

    BOOL isPhone = [[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPhone;
    if (isPhone)
        EXPECT_NOT_NULL(webView.textInputContentView.inputView);

    [webView selectFormAccessoryPickerRow:1];
    [webView dismissFormAccessoryView];
    EXPECT_EQ(1, [webView stringByEvaluatingJavaScript:@"document.querySelector('select').selectedIndex"].intValue);

    if (isPhone)
        EXPECT_FALSE([webView stringByEvaluatingJavaScript:@"document.activeElement == document.querySelector('select')"].boolValue);

    [webView.textInputContentView _restoreFocusWithToken:focusToken];
}

} // namespace TestWebKitAPI

#endif // PLATFORM(IOS_FAMILY)