Imported Upstream version 5.10.0.47

Former-commit-id: d0813289fa2d35e1f8ed77530acb4fb1df441bc0

external/corefx/src/System.Drawing.Common/tests/Helpers.cs

@@ -1,18 +1,104 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // See the LICENSE file in the project root for more information.
 
+using System.Drawing.Printing;
 using System.IO;
 using System.Runtime.InteropServices;
 using System.Text;
 using Xunit;
 using Xunit.Sdk;
 
-namespace System.Drawing.Tests
+namespace System.Drawing
 {
     public static class Helpers
     {
+        public const string GdiplusIsAvailable = nameof(Helpers) + "." + nameof(GetGdiplusIsAvailable);
+        public const string RecentGdiplusIsAvailable = nameof(Helpers) + "." + nameof(GetRecentGdiPlusIsAvailable);
+        public const string RecentGdiplusIsAvailable2 = nameof(Helpers) + "." + nameof(GetRecentGdiPlusIsAvailable2);
+        public const string GdiPlusIsAvailableNotRedhat73 = nameof(Helpers) + "." + nameof(GetGdiPlusIsAvailableNotRedhat73);
+        public const string GdiPlusIsAvailableNotWindows7 = nameof(Helpers) + "." + nameof(GetGdiPlusIsAvailableNotWindows7);
+        public const string AnyInstalledPrinters = nameof(Helpers) + "." + nameof(IsAnyInstalledPrinters);
+
+        public static bool GetGdiplusIsAvailable()
+        {
+            if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
+            {
+                return PlatformDetection.IsNotWindowsNanoServer && PlatformDetection.IsNotWindowsServerCore;
+            }
+            else
+            {
+                IntPtr nativeLib;
+                if (RuntimeInformation.IsOSPlatform(OSPlatform.OSX))
+                {
+                    nativeLib = dlopen("libgdiplus.dylib", RTLD_NOW);
+                }
+                else
+                {
+                    nativeLib = dlopen("libgdiplus.so", RTLD_NOW);
+                    if (nativeLib == IntPtr.Zero)
+                    {
+                        nativeLib = dlopen("libgdiplus.so.0", RTLD_NOW);
+                    }
+                }
+
+                return nativeLib != IntPtr.Zero;
+            }
+        }
+
+        public static bool GetRecentGdiPlusIsAvailable2()
+        {
+            // CentOS 7, RHEL 7 and Ubuntu 14.04, as well as Fedora 25 and OpenSUSE 4.22 are running outdated versions of libgdiplus
+            if (PlatformDetection.IsCentos7 || PlatformDetection.IsRedHat || PlatformDetection.IsUbuntu1404 || PlatformDetection.IsFedora || PlatformDetection.IsOpenSUSE)
+            {
+                return false;
+            }
+
+            return GetGdiplusIsAvailable();
+        }
+
+        public static bool GetGdiPlusIsAvailableNotRedhat73()
+        {
+            if (PlatformDetection.IsRedHat)
+            {
+                return false;
+            }
+
+            return GetGdiplusIsAvailable();
+        }
+
+        public static bool GetGdiPlusIsAvailableNotWindows7()
+        {
+            if (PlatformDetection.IsWindows7)
+            {
+                return false;
+            }
+
+            return GetGdiplusIsAvailable();
+        }
+
+        public static bool GetRecentGdiPlusIsAvailable()
+        {
+            // CentOS 7, RHEL 7 and Ubuntu 14.04 are running outdated versions of libgdiplus
+            if (PlatformDetection.IsCentos7 || PlatformDetection.IsRedHat || PlatformDetection.IsUbuntu1404)
+            {
+                return false;
+            }
+
+            return GetGdiplusIsAvailable();
+        }
+
+        public static bool IsAnyInstalledPrinters()
+        {
+            return PrinterSettings.InstalledPrinters.Count > 0;
+        }
+
+        [DllImport("libdl")]
+        private static extern IntPtr dlopen(string libName, int flags);
+        public const int RTLD_NOW = 0x002;
+
         public static string GetTestBitmapPath(string fileName) => GetTestPath("bitmaps", fileName);
         public static string GetTestFontPath(string fileName) => GetTestPath("fonts", fileName);
+        public static string GetTestColorProfilePath(string fileName) => GetTestPath("colorProfiles", fileName);
 
         private static string GetTestPath(string directoryName, string fileName) => Path.Combine(AppContext.BaseDirectory, directoryName, fileName);
 
@@ -142,5 +228,23 @@ namespace System.Drawing.Tests
             public int Right;
             public int Bottom;
         }
+
+        public static void VerifyBitmapNotBlank(Bitmap bmp)
+        {
+            Color emptyColor = Color.FromArgb(0);
+            for (int y = 0; y < bmp.Height; y++)
+            {
+                for (int x = 0; x < bmp.Width; x++)
+                {
+                    Color pixel = bmp.GetPixel(x, y);
+                    if (!pixel.Equals(emptyColor))
+                    {
+                        return;
+                    }
+                }
+            }
+
+            throw new XunitException("The entire image was blank.");
+        }
     }
 }