94 строки
3.5 KiB
C#
94 строки
3.5 KiB
C#
//
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// Unit tests for CGDataProvider
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//
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// Authors:
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// Sebastien Pouliot <sebastien@xamarin.com>
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//
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// Copyright 2014-2015 Xamarin Inc. All rights reserved.
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//
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using System;
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using System.IO;
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using System.Runtime.InteropServices;
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using System.Text;
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using Foundation;
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using CoreGraphics;
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using ObjCRuntime;
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using NUnit.Framework;
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namespace MonoTouchFixtures.CoreGraphics {
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[TestFixture]
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[Preserve (AllMembers = true)]
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public class DataProviderTest {
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[Test]
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public void FromPNG ()
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{
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string file = Path.Combine (NSBundle.MainBundle.ResourcePath, "basn3p08.png");
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using (var dp = CGDataProvider.FromFile (file))
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using (var img = CGImage.FromPNG (dp, null, false, CGColorRenderingIntent.Default)) {
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Assert.That ((int) img.Height, Is.EqualTo (32), "Height");
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Assert.That ((int) img.Width, Is.EqualTo (32), "Width");
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}
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}
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[DllImport (Constants.CoreGraphicsLibrary)]
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extern static /* CGDataProviderRef */ IntPtr CGDataProviderCreateWithFilename (/* const char* */ string filename);
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[DllImport (Constants.CoreGraphicsLibrary)]
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static extern /* CGDataProviderRef */ IntPtr CGDataProviderCreateWithURL (/* CFURLRef __nullable */ IntPtr url);
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[DllImport (Constants.CoreGraphicsLibrary)]
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static extern /* CGDataProviderRef */ IntPtr CGDataProviderCreateWithCFData (/* CFDataRef __nullable */ IntPtr data);
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[DllImport (Constants.CoreGraphicsLibrary)]
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extern static IntPtr CGDataProviderCreateWithData (/* void* */ IntPtr info, /* const void* */ IntPtr data, /* size_t */ IntPtr size, /* CGDataProviderReleaseDataCallback */ IntPtr releaseData);
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[Test]
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public void Create_Nullable ()
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{
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// the native API accept a nil argument but it returns nil, so we must keep our ArgumentNullException as
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// a .NET constructor can't return null (and we don't want invalid managed instances)
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Assert.That (CGDataProviderCreateWithFilename (null), Is.EqualTo (IntPtr.Zero), "CGDataProviderCreateWithFilename");
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Assert.That (CGDataProviderCreateWithURL (IntPtr.Zero), Is.EqualTo (IntPtr.Zero), "CGDataConsumerCreateWithURL");
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Assert.That (CGDataProviderCreateWithCFData (IntPtr.Zero), Is.EqualTo (IntPtr.Zero), "CGDataProviderCreateWithCFData");
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// crash with iOS 13 beta 3
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// Assert.That (CGDataProviderCreateWithData (IntPtr.Zero, IntPtr.Zero, IntPtr.Zero, IntPtr.Zero), Is.EqualTo (IntPtr.Zero), "CGDataProviderCreateWithData");
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}
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[Test]
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public void Create_ReleaseCallback ()
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{
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IntPtr memory = Marshal.AllocHGlobal (20);
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using (var provider = new CGDataProvider (memory, 20, ((IntPtr mem) =>
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{
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Assert.AreEqual (memory, mem, "mem");
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Marshal.FreeHGlobal (mem);
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memory = IntPtr.Zero;
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}))) {
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}
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Assert.AreEqual (IntPtr.Zero, memory, "mem freed");
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}
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[Test]
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public void CreateWithUnownedMemory ()
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{
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const string canary = "canary";
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var source = Encoding.UTF8.GetBytes (canary);
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IntPtr memory = Marshal.AllocHGlobal (20);
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Marshal.Copy (source, 0, memory, source.Length);
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using (var provider = new CGDataProvider (memory, 20, false)) {
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// `memory` is copied, but not freed (but the copy is freed)
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Assert.That (provider.Handle, Is.Not.EqualTo (IntPtr.Zero), "Handle");
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}
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// so `memory` still accessible afterward and must be freed
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// using `canary.Length` since the allocated memory might not be zero'ed
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// so reading back the string would not hit a null after what we copied
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Assert.That (Marshal.PtrToStringAuto (memory, canary.Length), Is.EqualTo (canary), "canary check");
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Marshal.FreeHGlobal (memory);
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}
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}
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}
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