Tools/TestWebKitAPI/Tests/WebKitCocoa/AudioBufferSize.mm

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#import "config.h"

#if WK_HAVE_C_SPI

#import "PlatformUtilities.h"
#import "Test.h"
#import "TestWKWebView.h"
#import "UserMediaCaptureUIDelegate.h"
#import <WebKit/WKPreferencesPrivate.h>
#import <WebKit/WKWebViewConfiguration.h>
#import <WebKit/WKWebViewConfigurationPrivate.h>
#import <WebKit/WKWebViewPrivate.h>

#import <wtf/RetainPtr.h>
#import <wtf/Seconds.h>

namespace TestWebKitAPI {

double waitForBufferSizeChange(WKWebView* webView, double oldSize)
{
    int tries = 0;
    do {
        auto size = [webView stringByEvaluatingJavaScript:@"window.internals.currentAudioBufferSize()"].doubleValue;
        if (size != oldSize)
            return size;

        TestWebKitAPI::Util::sleep(0.1);
    } while (++tries <= 100);

    ASSERT_NOT_REACHED();
    return 0;
}

TEST(WebKit, AudioBufferSize)
{
    auto configuration = adoptNS([[WKWebViewConfiguration alloc] init]);
    auto context = adoptWK(TestWebKitAPI::Util::createContextForInjectedBundleTest("InternalsInjectedBundleTest"));

#if PLATFORM(IOS)
    configuration.get().allowsInlineMediaPlayback = YES;
    configuration.get()._inlineMediaPlaybackRequiresPlaysInlineAttribute = NO;
#endif
    configuration.get()._mediaDataLoadsAutomatically = YES;
    configuration.get().mediaTypesRequiringUserActionForPlayback = WKAudiovisualMediaTypeNone;
    configuration.get().processPool = (WKProcessPool *)context.get();
    configuration.get()._mediaCaptureEnabled = YES;
    auto preferences = [configuration preferences];
    preferences._mediaCaptureRequiresSecureConnection = NO;
    preferences._mockCaptureDevicesEnabled = YES;

    auto webView = adoptNS([[TestWKWebView alloc] initWithFrame:NSMakeRect(0, 0, 300, 300) configuration:configuration.get() addToWindow:YES]);
    auto delegate = adoptNS([[UserMediaCaptureUIDelegate alloc] init]);
    webView.get().UIDelegate = delegate.get();

    [webView synchronouslyLoadTestPageNamed:@"audio-buffer-size"];

    __block bool gotMessage = false;
    [webView performAfterReceivingMessage:@"playing" action:^{ gotMessage = true; }];
    [webView evaluateJavaScript:@"playVideo()" completionHandler:nil];
    TestWebKitAPI::Util::run(&gotMessage);
    auto bufferSizePlayingAudio = [webView stringByEvaluatingJavaScript:@"window.internals.currentAudioBufferSize()"].doubleValue;

    [webView evaluateJavaScript:@"startCapture()" completionHandler:nil];
    [delegate waitUntilPrompted];
    auto bufferSizeCapturingAudio = waitForBufferSizeChange(webView.get(), bufferSizePlayingAudio);
    ASSERT_LT(bufferSizeCapturingAudio, bufferSizePlayingAudio);

    [webView evaluateJavaScript:@"createWebAudioNode()" completionHandler:nil];
    auto bufferSizeWithWebAudio = waitForBufferSizeChange(webView.get(), bufferSizeCapturingAudio);
    ASSERT_LT(bufferSizeWithWebAudio, bufferSizeCapturingAudio);

    [webView evaluateJavaScript:@"disconnectWebAudioNode()" completionHandler:nil];
    auto bufferSizeWithoutWebAudio = waitForBufferSizeChange(webView.get(), bufferSizeWithWebAudio);
    ASSERT_GT(bufferSizeWithoutWebAudio, bufferSizeWithWebAudio);
    ASSERT_EQ(bufferSizeWithoutWebAudio, bufferSizeCapturingAudio);

    [webView evaluateJavaScript:@"stopCapture()" completionHandler:nil];
    auto bufferSizeWithoutCapture = waitForBufferSizeChange(webView.get(), bufferSizeWithoutWebAudio);
    ASSERT_GT(bufferSizeWithoutCapture, bufferSizeWithoutWebAudio);
    ASSERT_EQ(bufferSizeWithoutCapture, bufferSizePlayingAudio);

    [webView removeFromSuperview];
}

} // namespace TestWebKitAPI

#endif // WK_HAVE_C_SPI