Fix builds on macOS

.github/workflows/CI-CD.yml

@@ -23,10 +23,20 @@ jobs:
     name: "Build and Test"
     strategy:
       matrix:
-        os: [windows-latest, ubuntu-latest]
+        os: [windows-latest, ubuntu-latest, macos-12]
     runs-on: ${{ matrix.os }}
 
     steps:
+    - name: Install MacPorts
+      if: ${{ matrix.os == 'macos-12' }}
+      uses: melusina-org/setup-macports@v1
+
+    - name: Install icu4c on macOS
+      if: ${{ matrix.os == 'macos-12' }}
+      run: |
+        sudo port -v install icu
+        echo "DYLD_FALLBACK_LIBRARY_PATH=$HOME/lib:/usr/local/lib:/usr/lib:/opt/local/lib" >> $GITHUB_ENV
+
     - name: Checkout
       uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
       with:
@@ -35,7 +45,7 @@ jobs:
     - name: Install .NET Core
       uses: actions/setup-dotnet@4d6c8fcf3c8f7a60068d26b594648e99df24cee3 # v4.0.0
       with:
-        dotnet-version: 6.0.x
+        dotnet-version: 8.0.x
 
     - name: Build
       run: dotnet build --configuration Release source/icu.net.sln

source/Directory.Build.props

@@ -1,6 +1,6 @@
 <Project>
   <PropertyGroup>
-    <TargetFrameworks>net40;net451;netstandard1.6;net6.0</TargetFrameworks>
+    <TargetFrameworks>net40;net451;netstandard1.6;net8.0</TargetFrameworks>
     <PlatformAlias>netstandard</PlatformAlias>
     <OutputPath>$(MSBuildThisFileDirectory)\..\output\$(Configuration)</OutputPath>
     <PackageOutputPath>$(MSBuildThisFileDirectory)\..\output</PackageOutputPath>

source/TestHelper/TestHelper.csproj

@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>net461;net6.0</TargetFrameworks>
+    <TargetFrameworks>net8.0</TargetFrameworks>
     <OutputPath>../../output/$(Configuration)/TestHelper</OutputPath>
     <OutputType>Exe</OutputType>
     <RootNamespace>Icu.Tests</RootNamespace>

source/icu.net.tests/IcuWrapperTests.cs

@@ -91,8 +91,8 @@ public void IcuVersion()
 			Assert.That(int.TryParse(result.Substring(0, result.IndexOf(".", StringComparison.Ordinal)), out var major), Is.True);
 		}
 
-		[Platform(Exclude = "Linux",
-			Reason = "These tests require ICU4C installed from NuGet packages which isn't available on Linux")]
+		[Platform(Include = "Win",
+			Reason = "These tests require ICU4C installed from NuGet packages which is only available on Windows")]
 		[Test]
 		public void ConfineVersions_WorksAfterInit()
 		{
@@ -105,8 +105,8 @@ public void ConfineVersions_WorksAfterInit()
 			Assert.That(Wrapper.DataDirectory, Is.EqualTo("Test"));
 		}
 
-		[Platform(Exclude = "Linux",
-			Reason = "These tests require ICU4C installed from NuGet packages which isn't available on Linux")]
+		[Platform(Include = "Win",
+			Reason = "These tests require ICU4C installed from NuGet packages which is only available on Windows")]
 		[Test]
 		public void ConfineVersions_LoadFromDifferentDirectory_LowerVersion()
 		{
@@ -130,8 +130,8 @@ public void ConfineVersions_LoadFromDifferentDirectory_LowerVersion()
 			Assert.That(result, Is.EqualTo(NativeMethodsTests.MinIcuLibraryVersion));
 		}
 
-		[Platform(Exclude = "Linux",
-			Reason = "These tests require ICU4C installed from NuGet packages which isn't available on Linux")]
+		[Platform(Include = "Win",
+			Reason = "These tests require ICU4C installed from NuGet packages which is only available on Windows")]
 		[Test]
 		public void ConfineVersions_LoadFromDifferentDirectory_HigherVersion()
 		{
@@ -155,8 +155,8 @@ public void ConfineVersions_LoadFromDifferentDirectory_HigherVersion()
 			Assert.That(result, Is.EqualTo(NativeMethodsTests.FullIcuLibraryVersion));
 		}
 
-		[Platform(Exclude = "Linux",
-			Reason = "These tests require ICU4C installed from NuGet packages which isn't available on Linux")]
+		[Platform(Include = "Win",
+			Reason = "These tests require ICU4C installed from NuGet packages which is only available on Windows")]
 		[Test]
 		public void ConfineVersions_LoadFromDifferentDirectory_NotInPreferredDir()
 		{

source/icu.net.tests/NativeMethods/NativeMethodsHelperTests.cs

@@ -14,6 +14,7 @@ public class NativeMethodsHelperTests
 	{
 		private string _filenameWindows;
 		private string _filenameLinux;
+		private string _filenameMac;
 
 		private int CallGetIcuVersionInfoForNetCoreOrWindows()
 		{
@@ -36,13 +37,16 @@ public void Setup()
 			File.WriteAllText(_filenameWindows, "just a dummy file");
 			_filenameLinux = Path.Combine(NativeMethodsTests.OutputDirectory, $"libicuuc.so.{Wrapper.MaxSupportedIcuVersion}.1");
 			File.WriteAllText(_filenameLinux, "just a dummy file");
+			_filenameMac = Path.Combine(NativeMethodsTests.OutputDirectory, $"libicuuc.{Wrapper.MaxSupportedIcuVersion}.dylib");
+			File.WriteAllText(_filenameMac, "just a dummy file");
 		}
 
 		[TearDown]
 		public void TearDown()
 		{
 			File.Delete(_filenameWindows);
 			File.Delete(_filenameLinux);
+			File.Delete(_filenameMac);
 			Wrapper.Cleanup();
 		}
 

source/icu.net.tests/NativeMethods/NativeMethodsTests.cs

@@ -8,8 +8,8 @@
 
 namespace Icu.Tests
 {
-	[Platform(Exclude = "Linux",
-		Reason = "These tests require ICU4C installed from NuGet packages which isn't available on Linux")]
+	[Platform(Include = "Win",
+		Reason = "These tests require ICU4C installed from NuGet packages which is only available on Windows")]
 	[TestFixture]
 	public class NativeMethodsTests
 	{

source/icu.net.tests/ResourceBundleTests.cs

@@ -51,14 +51,16 @@ public void GetStringContentsWithKeys()
 			}
 		}
 
-		[TestCase("en_US", ExpectedResult = "[a b c d e f g h i j k l m n o p q r s t u v w x y z]")]
-		[TestCase("de_DE", ExpectedResult = "[a ä b c d e f g h i j k l m n o ö p q r s ß t u ü v w x y z]")]
-		[TestCase("fr_FR", ExpectedResult = "[a à â æ b c ç d e é è ê ë f g h i î ï j k l m n o ô œ p q r s t u ù û ü v w x y ÿ z]")]
+		[TestCase("en_US", ExpectedResult = "[abcdefghijklmnopqrstuvwxyz]")]
+		[TestCase("de_DE", ExpectedResult = "[aäbcdefghijklmnoöpqrsßtuüvwxyz]")]
+		[TestCase("fr_FR",ExpectedResult = "[aàâæbcçdeéèêëfghiîïjklmnoôœpqrstuùûüvwxyÿz]")]
 		public string GetStringByKey(string localeId)
 		{
 			using (var resourceBundle = new ResourceBundle(null, localeId))
 			{
-				return resourceBundle.GetStringByKey("ExemplarCharacters");
+				// Ideally this should be parsed by something that understands UnicodeSet structures
+				// Since spaces aren't meaningful in UnicodeSets, we'll take a shortcut and remove them
+				return resourceBundle.GetStringByKey("ExemplarCharacters").Replace(" ", "");
 			}
 		}
 	}

source/icu.net.tests/TimeZoneTests.cs

@@ -63,6 +63,7 @@ public void GetOffsetTimeZonesTest()
 			Assert.GreaterOrEqual(timezones.Count(), 3);
 		}
 
+		[Platform(Exclude = "MacOsX", Reason = "The timezone ID for UTC can come in as Universal")]
 		[Test]
 		public void GetDefaultTimeZoneTest()
 		{

source/icu.net.tests/icu.net.tests.csproj

@@ -1,6 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>net461;net6.0</TargetFrameworks>
+    <TargetFrameworks>net8.0</TargetFrameworks>
     <RootNamespace>Icu.Tests</RootNamespace>
     <AssemblyTitle>icu.net.tests</AssemblyTitle>
     <IsPackable>false</IsPackable>

source/icu.net/NativeMethods/NativeMethodsHelper.cs

@@ -24,9 +24,10 @@ internal static class NativeMethodsHelper
 		private const string Icu4c = nameof(Icu4c);
 		private const string IcuRegexLinux = @"libicu\w+.so\.(?<version>[0-9]{2,})(\.[0-9])*";
 		private const string IcuRegexWindows = @"icu\w+(?<version>[0-9]{2,})(\.[0-9])*\.dll";
+		private const string IcuRegexMac = @"libicu\w+.(?<version>[0-9]{2,})(\.[0-9])*.dylib";
 
-		private static readonly Regex IcuBinaryRegex = new Regex($"{IcuRegexWindows}|{IcuRegexLinux}$", RegexOptions.Compiled);
-		private static readonly string IcuSearchPattern = Platform.OperatingSystem == OperatingSystemType.Windows ? "icu*.dll" : "libicu*.so.*";
+		private static readonly Regex IcuBinaryRegex = new ($"{IcuRegexWindows}|{IcuRegexLinux}|{IcuRegexMac}$", RegexOptions.Compiled);
+		private static readonly string IcuSearchPattern = Platform.OperatingSystem == OperatingSystemType.Windows ? "icu*.dll" : Platform.OperatingSystem == OperatingSystemType.MacOSX ? "libicu*.*.dylib" : "libicu*.so.*";
 		private static readonly string NugetPackageDirectory = GetDefaultPackageDirectory(Platform.OperatingSystem);
 
 		// ReSharper disable once InconsistentNaming
@@ -81,7 +82,7 @@ public static IcuVersionInfo GetIcuVersionInfoForNetCoreOrWindows()
 			// If this is false, something went wrong.  These files should have
 			// either been found above or we should have been able to locate the
 			// asset paths (for .NET Core and NuGet v3+ projects).
-			if (!TryGetNativeAssetPaths(context, out var nativeAssetPaths))
+ 			if (!TryGetNativeAssetPaths(context, out var nativeAssetPaths))
 			{
 				Trace.WriteLine("Could not locate icu native assets from DependencyModel.");
 				return IcuVersion;

source/icu.net/icu.net.csproj

@@ -34,6 +34,15 @@
     <Compile Remove="SortKey.cs" />
   </ItemGroup>
 
+  <!-- ICU must be installed using MacPorts before this will work -->
+  <ItemGroup>
+    <Content Include="/opt/local/lib/*.dylib" Condition="$([MSBuild]::IsOSPlatform('OSX'))">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </Content>
+  </ItemGroup>
+  <!-- Also add the following to .zprofile file. It is already included in the GitHub build. -->
+  <!-- export DYLD_FALLBACK_LIBRARY_PATH="$HOME/lib:/usr/local/lib:/usr/lib:/opt/local/lib" -->
+
   <ItemGroup>
     <None Include="App.config" Pack="true" PackagePath="contentFiles\any\any\$(AssemblyTitle).dll.config" />
     <None Include="../../README.md" Pack="true" PackagePath="/">