FlutterDisplayLinkTest.mm File Reference

#import "flutter/shell/platform/darwin/macos/framework/Source/FlutterDisplayLink.h"
#import <AppKit/AppKit.h>
#include <numeric>
#include "flutter/fml/synchronization/waitable_event.h"
#include "flutter/testing/testing.h"

Go to the source code of this file.

Classes
class	TestDisplayLinkDelegate

Functions
	TEST (FlutterDisplayLinkTest, ViewAddedToWindowFirst)
	TEST (FlutterDisplayLinkTest, ViewAddedToWindowLater)
	TEST (FlutterDisplayLinkTest, ViewRemovedFromWindow)
	TEST (FlutterDisplayLinkTest, WorkaroundForFB13482573)
	TEST (FlutterDisplayLinkTest, CVDisplayLinkInterval)

Function Documentation

TEST() [1/5]

TEST	(	FlutterDisplayLinkTest	,
		CVDisplayLinkInterval
	)

Definition at line 153 of file FlutterDisplayLinkTest.mm.

                                                    {
  CVDisplayLinkRef link;
  CVDisplayLinkCreateWithCGDisplay(CGMainDisplayID(), &link);
  __block CFTimeInterval last = 0;
  auto intervals = std::make_shared<std::vector<CFTimeInterval>>();
  auto event = std::make_shared<fml::AutoResetWaitableEvent>();
  CVDisplayLinkSetOutputHandler(
      link, ^(CVDisplayLinkRef displayLink, const CVTimeStamp* inNow,
              const CVTimeStamp* inOutputTime, CVOptionFlags flagsIn, CVOptionFlags* flagsOut) {
        if (last != 0) {
          intervals->push_back(CACurrentMediaTime() - last);
        }
        last = CACurrentMediaTime();
        if (intervals->size() == 10) {
          event->Signal();
        }
        return 0;
      });
 
  CVDisplayLinkStart(link);
  event->Wait();
  CVDisplayLinkStop(link);
  CVDisplayLinkRelease(link);
  CFTimeInterval average = std::reduce(intervals->begin(), intervals->end()) / intervals->size();
  CFTimeInterval max = *std::max_element(intervals->begin(), intervals->end());
  CFTimeInterval min = *std::min_element(intervals->begin(), intervals->end());
  NSLog(@"CVDisplayLink Interval: Average: %fs, Max: %fs, Min: %fs", average, max, min);
}

TEST() [2/5]

TEST	(	FlutterDisplayLinkTest	,
		ViewAddedToWindowFirst
	)

Definition at line 36 of file FlutterDisplayLinkTest.mm.

                                                     {
  NSWindow* window = [[NSWindow alloc] initWithContentRect:NSMakeRect(0, 0, 100, 100)
                                                 styleMask:NSWindowStyleMaskTitled
                                                   backing:NSBackingStoreNonretained
                                                     defer:NO];
  NSView* view = [[NSView alloc] initWithFrame:NSMakeRect(0, 0, 100, 100)];
  [window setContentView:view];
 
  auto event = std::make_shared<fml::AutoResetWaitableEvent>();
 
  TestDisplayLinkDelegate* delegate = [[TestDisplayLinkDelegate alloc]
      initWithBlock:^(CFTimeInterval timestamp, CFTimeInterval targetTimestamp) {
        event->Signal();
      }];
 
  FlutterDisplayLink* displayLink = [FlutterDisplayLink displayLinkWithView:view];
  displayLink.delegate = delegate;
  displayLink.paused = NO;
 
  event->Wait();
 
  [displayLink invalidate];
}

TEST() [3/5]

TEST	(	FlutterDisplayLinkTest	,
		ViewAddedToWindowLater
	)

Definition at line 60 of file FlutterDisplayLinkTest.mm.

                                                     {
  NSView* view = [[NSView alloc] initWithFrame:NSMakeRect(0, 0, 100, 100)];
 
  auto event = std::make_shared<fml::AutoResetWaitableEvent>();
 
  TestDisplayLinkDelegate* delegate = [[TestDisplayLinkDelegate alloc]
      initWithBlock:^(CFTimeInterval timestamp, CFTimeInterval targetTimestamp) {
        event->Signal();
      }];
 
  FlutterDisplayLink* displayLink = [FlutterDisplayLink displayLinkWithView:view];
  displayLink.delegate = delegate;
  displayLink.paused = NO;
 
  NSWindow* window = [[NSWindow alloc] initWithContentRect:NSMakeRect(0, 0, 100, 100)
                                                 styleMask:NSWindowStyleMaskTitled
                                                   backing:NSBackingStoreNonretained
                                                     defer:NO];
  [window setContentView:view];
 
  event->Wait();
 
  [displayLink invalidate];
}

TEST() [4/5]

TEST	(	FlutterDisplayLinkTest	,
		ViewRemovedFromWindow
	)

Definition at line 85 of file FlutterDisplayLinkTest.mm.

                                                    {
  NSWindow* window = [[NSWindow alloc] initWithContentRect:NSMakeRect(0, 0, 100, 100)
                                                 styleMask:NSWindowStyleMaskTitled
                                                   backing:NSBackingStoreNonretained
                                                     defer:NO];
  NSView* view = [[NSView alloc] initWithFrame:NSMakeRect(0, 0, 100, 100)];
  [window setContentView:view];
 
  auto event = std::make_shared<fml::AutoResetWaitableEvent>();
 
  TestDisplayLinkDelegate* delegate = [[TestDisplayLinkDelegate alloc]
      initWithBlock:^(CFTimeInterval timestamp, CFTimeInterval targetTimestamp) {
        event->Signal();
      }];
 
  FlutterDisplayLink* displayLink = [FlutterDisplayLink displayLinkWithView:view];
  displayLink.delegate = delegate;
  displayLink.paused = NO;
 
  event->Wait();
  displayLink.paused = YES;
 
  event->Reset();
 
  displayLink.paused = NO;
 
  [window setContentView:nil];
 
  EXPECT_TRUE(event->WaitWithTimeout(fml::TimeDelta::FromMilliseconds(100)));
  EXPECT_FALSE(event->IsSignaledForTest());
 
  [displayLink invalidate];
}

TEST() [5/5]

TEST	(	FlutterDisplayLinkTest	,
		WorkaroundForFB13482573
	)

Definition at line 119 of file FlutterDisplayLinkTest.mm.

                                                      {
  NSWindow* window = [[NSWindow alloc] initWithContentRect:NSMakeRect(0, 0, 100, 100)
                                                 styleMask:NSWindowStyleMaskTitled
                                                   backing:NSBackingStoreNonretained
                                                     defer:NO];
  NSView* view = [[NSView alloc] initWithFrame:NSMakeRect(0, 0, 100, 100)];
  [window setContentView:view];
 
  auto event = std::make_shared<fml::AutoResetWaitableEvent>();
 
  TestDisplayLinkDelegate* delegate = [[TestDisplayLinkDelegate alloc]
      initWithBlock:^(CFTimeInterval timestamp, CFTimeInterval targetTimestamp) {
        event->Signal();
      }];
 
  FlutterDisplayLink* displayLink = [FlutterDisplayLink displayLinkWithView:view];
  displayLink.delegate = delegate;
  displayLink.paused = NO;
 
  event->Wait();
  displayLink.paused = YES;
 
  event->Reset();
  [NSThread detachNewThreadWithBlock:^{
    // Here pthread_self() will be same as pthread_self inside first invocation of
    // display link callback, causing CVDisplayLinkStart to return error.
    displayLink.paused = NO;
  }];
 
  event->Wait();
 
  [displayLink invalidate];
}