Add unit tests for PrepareAbiItems MSBuild task

src/Xamarin.Android.Build.Tasks/Tests/Xamarin.Android.Build.Tests/Tasks/PrepareAbiItemsTests.cs

@@ -0,0 +1,110 @@
+using NUnit.Framework;
+using System.Collections.Generic;
+using System.Linq;
+using Microsoft.Build.Framework;
+using Xamarin.Android.Tasks;
+
+namespace Xamarin.Android.Build.Tests
+{
+	[TestFixture]
+	public class PrepareAbiItemsTests : BaseTest
+	{
+		[TestCase ("typemap", "typemaps")]
+		[TestCase ("environment", "environment")]
+		[TestCase ("compressed", "compressed_assemblies")]
+		[TestCase ("jniremap", "jni_remap")]
+		[TestCase ("marshal_methods", "marshal_methods")]
+		[TestCase ("runtime_linking", "pinvoke_preserve")]
+		[TestCase ("jni_init", "jni_init_funcs")]
+		public void ValidMode_ProducesCorrectBaseName (string mode, string expectedBase)
+		{
+			var task = new PrepareAbiItems {
+				BuildEngine = new MockBuildEngine (TestContext.Out),
+				BuildTargetAbis = new [] { "arm64-v8a" },
+				NativeSourcesDir = "/native/src",
+				Mode = mode,
+				Debug = false,
+			};
+			Assert.IsTrue (task.Execute ());
+			Assert.IsNotNull (task.AssemblySources);
+			Assert.AreEqual (1, task.AssemblySources.Length);
+			Assert.AreEqual ($"/native/src/{expectedBase}.arm64-v8a.ll", task.AssemblySources [0].ItemSpec);
+			Assert.AreEqual ("arm64-v8a", task.AssemblySources [0].GetMetadata ("abi"));
+		}
+
+		[TestCase ("TypeMap", "typemaps")]
+		[TestCase ("TYPEMAP", "typemaps")]
+		[TestCase ("Environment", "environment")]
+		[TestCase ("COMPRESSED", "compressed_assemblies")]
+		[TestCase ("JniRemap", "jni_remap")]
+		[TestCase ("Marshal_Methods", "marshal_methods")]
+		[TestCase ("Runtime_Linking", "pinvoke_preserve")]
+		[TestCase ("JNI_INIT", "jni_init_funcs")]
+		public void ValidMode_CaseInsensitive (string mode, string expectedBase)
+		{
+			var task = new PrepareAbiItems {
+				BuildEngine = new MockBuildEngine (TestContext.Out),
+				BuildTargetAbis = new [] { "x86_64" },
+				NativeSourcesDir = "/native/src",
+				Mode = mode,
+				Debug = false,
+			};
+			Assert.IsTrue (task.Execute ());
+			Assert.IsNotNull (task.AssemblySources);
+			Assert.AreEqual (1, task.AssemblySources.Length);
+			Assert.AreEqual ($"/native/src/{expectedBase}.x86_64.ll", task.AssemblySources [0].ItemSpec);
+		}
+
+		[Test]
+		public void InvalidMode_LogsErrorAndReturnsFalse ()
+		{
+			var errors = new List<BuildErrorEventArgs> ();
+			var task = new PrepareAbiItems {
+				BuildEngine = new MockBuildEngine (TestContext.Out, errors),
+				BuildTargetAbis = new [] { "arm64-v8a" },
+				NativeSourcesDir = "/native/src",
+				Mode = "invalid_mode",
+				Debug = false,
+			};
+			Assert.IsFalse (task.Execute ());
+			Assert.AreEqual (1, errors.Count);
+		}
+
+		[Test]
+		public void MultipleAbis_CreatesItemForEachAbi ()
+		{
+			var abis = new [] { "arm64-v8a", "armeabi-v7a", "x86_64", "x86" };
+			var task = new PrepareAbiItems {
+				BuildEngine = new MockBuildEngine (TestContext.Out),
+				BuildTargetAbis = abis,
+				NativeSourcesDir = "/native/src",
+				Mode = "typemap",
+				Debug = false,
+			};
+			Assert.IsTrue (task.Execute ());
+			Assert.IsNotNull (task.AssemblySources);
+			Assert.AreEqual (abis.Length, task.AssemblySources.Length);
+			for (int i = 0; i < abis.Length; i++) {
+				Assert.AreEqual ($"/native/src/typemaps.{abis [i]}.ll", task.AssemblySources [i].ItemSpec);
+				Assert.AreEqual (abis [i], task.AssemblySources [i].GetMetadata ("abi"));
+			}
+		}
+
+		[Test]
+		public void SingleAbi_CreatesSingleItem ()
+		{
+			var task = new PrepareAbiItems {
+				BuildEngine = new MockBuildEngine (TestContext.Out),
+				BuildTargetAbis = new [] { "x86" },
+				NativeSourcesDir = "/output",
+				Mode = "environment",
+				Debug = true,
+			};
+			Assert.IsTrue (task.Execute ());
+			Assert.IsNotNull (task.AssemblySources);
+			Assert.AreEqual (1, task.AssemblySources.Length);
+			Assert.AreEqual ("/output/environment.x86.ll", task.AssemblySources [0].ItemSpec);
+			Assert.AreEqual ("x86", task.AssemblySources [0].GetMetadata ("abi"));
+		}
+	}
+}