Merge pull request #6 from unoplatform/dev/jela/fix-return-type

Fix return type validation

.vsts-ci.yml

@@ -71,9 +71,7 @@ jobs:
     clean: all
 
   pool:
-    name: Default
-    demands:
-    - agent.os -equals Linux
+    vmImage: 'ubuntu-18.04'
     
   variables:
     NUGET_PACKAGES: $(Agent.WorkFolder)/.nuget

README.md

@@ -7,7 +7,7 @@ published nuget package (in nuget.org) and a local NuGet package.
 
 ## Installing
 
-Run the following command from commandline (requires .NET Core 2.1 installed):
+Run the following command from command line (requires .NET Core 2.1 installed):
 
 ```
 dotnet tool install --global Uno.PackageDiff
@@ -32,22 +32,22 @@ Here's the format:
   <IgnoreSets>
     <IgnoreSet baseVersion="1.0.0">
       <Types>
-        <Member fullName="MyNamespace.MyMissingClass"/>
+        <Member fullName="MyNamespace.MyMissingClass" />
       </Types>
       <Properties>
-        <Member fullName="MyNamespace.MyClass.MyProperty"/>
+        <Member fullName="MyNamespace.MyClass.MyProperty" />
       </Properties>
       <Fields>
-        <Member fullName="MyNamespace.MyClass.myField"/>
+        <Member fullName="MyNamespace.MyClass.myField" />
       </Fields>
       <Events>
-        <Member fullName="MyNamespace.MyClass.MyEvent"/>
+        <Member fullName="MyNamespace.MyClass.MyEvent" />
       </Events>
       <Methods>
-        <Member fullName="MyNamespace.MyClass.MyMethod"/>
+        <Member fullName="MyNamespace.MyClass.MyMethod" />
       </Methods>
       <Methods>
-        <Member fullName="MyNamespace.MyClass.MyMethod"/>
+        <Member fullName="MyNamespace.MyClass.MyMethod" />
       </Methods>
     </IgnoreSet>
   </IgnoreSets>
@@ -56,4 +56,4 @@ Here's the format:
 
 The `baseVersion` attribute denotes the version for which the Ignore Set has been authored. This enables for the automatic discarding of existing sets when a new package version is published in nuget.org.
 
-The `fullname` of members should be the exact string provided in the markdown file when a difference is identified.
+The `fullname` of members should be the exact string provided in the markdown file when a difference is identified.

src/Uno.PackageDiff.Tests/Given_AssemblyComparer.cs

@@ -81,5 +81,22 @@ namespace Uno.PackageDiff.Tests
 			Assert.AreEqual("System.Void Uno.PackageDiff.Tests.Sources.When_Target_Internal::set_MyProperty(System.Int32)", r.InvalidMethods.ElementAt(1).ToString());
 			Assert.AreEqual("System.Void Uno.PackageDiff.Tests.Sources.When_Target_Internal::MyMethod()", r.InvalidMethods.ElementAt(2).ToString());
 		}
+
+		[TestMethod]
+		public void When_Target_Method_ChangedReturnType()
+		{
+			var context = _builder.BuildAssemblies();
+			
+			var r = AssemblyComparer.CompareTypes(context.BaseAssembly, context.TargetAssembly);
+
+			Assert.AreEqual(0, r.InvalidTypes.Length);
+			Assert.AreEqual(0, r.InvalidEvents.Length);
+			Assert.AreEqual(0, r.InvalidFields.Length);
+			Assert.AreEqual(1, r.InvalidMethods.Length);
+			Assert.AreEqual(0, r.InvalidProperties.Length);
+
+			Assert.AreEqual("TestMethod", r.InvalidMethods.ElementAt(0).Name);
+			Assert.AreEqual("System.Threading.Tasks.Task Uno.PackageDiff.Tests.Sources.When_Target_Method_ChangedReturnType::TestMethod()", r.InvalidMethods.ElementAt(0).ToString());
+		}
 	}
 }

src/Uno.PackageDiff.Tests/Sources/Given_AssemblyComparer_When_Target_Method_ChangedReturnType.base.cs

@@ -0,0 +1,14 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Uno.PackageDiff.Tests.Sources
+{
+	public class When_Target_Method_ChangedReturnType
+	{
+		public void VoidMethod() { }
+		public int IntMethod() => 0;
+		public async Task TestMethod() { }
+	}
+}

src/Uno.PackageDiff.Tests/Sources/Given_AssemblyComparer_When_Target_Method_ChangedReturnType.target.cs

@@ -0,0 +1,14 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Uno.PackageDiff.Tests.Sources
+{
+	public class When_Target_Method_ChangedReturnType
+	{
+		public void VoidMethod() { }
+		public int IntMethod() => 0;
+		public async Task<bool> TestMethod() { return false; }
+	}
+}

src/Uno.PackageDiff/AssemblyComparer.cs

@@ -73,6 +73,7 @@ namespace Uno.PackageDiff
 					 where !type.sourceType.Methods
 						.Any(sourceMethod =>
 						sourceMethod.Name == targetMethod.Name
+						&& targetMethod.ReturnType.FullName == sourceMethod.ReturnType.FullName
 						&& targetMethodParams.SequenceEqual(getMethodParamsSignature(sourceMethod))
 						&& IsVisibleMethod(sourceMethod)
 						&& targetMethod.IsVirtual == sourceMethod.IsVirtual)