[tests] Add app size test cases to compare managed-static and trimmable-static.

.github/skills/update-expected-app-size/SKILL.md

@@ -22,7 +22,7 @@ Download updated expected app size files from Azure DevOps artifacts for the cur
 The app size tests (`tests/dotnet/UnitTests/AppSizeTest.cs`) compare the built app's size and preserved APIs against expected files stored in `tests/dotnet/UnitTests/expected/`. When the test detects a difference and `WRITE_KNOWN_FAILURES` is not set, it writes the updated expected file to `$(Build.ArtifactStagingDirectory)/updated-expected-sizes/`, and a pipeline step publishes this directory as a build artifact.
 
 The artifact name follows the pattern `{uploadPrefix}updated-expected-sizes-{testPrefix}-{attempt}` (e.g., `updated-expected-sizes-dotnettests_ios-1`). Because the expected files can be very big, the test uploads a unified **diff** for each changed expected file rather than the whole file. Inside the artifact, files are named after the test variant with a `.diff` suffix:
-- `{Platform}-{Variant}-size.txt.diff` — e.g., `iOS-MonoVM-size.txt.diff`, `iOS-MonoVM-interpreter-size.txt.diff`, `iOS-NativeAOT-TrimmableStatic-size.txt.diff`, `MacOSX-CoreCLR-Interpreter-size.txt.diff`
+- `{Platform}-{Variant}-size.txt.diff` — e.g., `iOS-MonoVM-size.txt.diff`, `iOS-MonoVM-interpreter-size.txt.diff`, `iOS-NativeAOT-TrimmableStatic-size.txt.diff`, `MacOSX-CoreCLR-Interpreter-ManagedStatic-size.txt.diff`
 - `{Platform}-{Variant}-preservedapis.txt.diff` — e.g., `iOS-MonoVM-preservedapis.txt.diff`, `MacCatalyst-MonoVM-interpreter-preservedapis.txt.diff`
 
 Each diff is a unified diff (relative to the repository root) that can be applied with `git apply -p1` or `patch -p1`. The expected files on disk are at:

tests/dotnet/UnitTests/AppSizeTest.cs

@@ -53,28 +53,30 @@ public void NativeAOT (ApplePlatform platform, string runtimeIdentifiers)
 		[TestCase (ApplePlatform.TVOS, "tvos-arm64", true)]
 		[TestCase (ApplePlatform.MacCatalyst, "maccatalyst-arm64", true)]
 		[TestCase (ApplePlatform.MacOSX, "osx-arm64;osx-x64", false)]
-		public void CoreCLR_Interpreter (ApplePlatform platform, string runtimeIdentifiers, bool isTrimmed)
+		public void CoreCLR_Interpreter_ManagedStatic (ApplePlatform platform, string runtimeIdentifiers, bool isTrimmed)
 		{
 			var dict = new Dictionary<string, string> () {
 				{ "UseMonoRuntime", "false" },
 				{ "PublishReadyToRun", "false" },
 				{ "NoDSymUtil", "false" }, // off by default for macOS, but we want to test it, so enable it
+				{ "Registrar", "managed-static" },
 			};
-			Run (platform, runtimeIdentifiers, "Release", $"{platform}-CoreCLR-Interpreter", isTrimmed, dict);
+			Run (platform, runtimeIdentifiers, "Release", $"{platform}-CoreCLR-Interpreter-ManagedStatic", isTrimmed, dict);
 		}
 
 		[TestCase (ApplePlatform.iOS, "ios-arm64", true)]
 		[TestCase (ApplePlatform.TVOS, "tvos-arm64", true)]
 		[TestCase (ApplePlatform.MacCatalyst, "maccatalyst-arm64", true)]
 		[TestCase (ApplePlatform.MacOSX, "osx-arm64;osx-x64", false)]
-		public void CoreCLR_R2R (ApplePlatform platform, string runtimeIdentifiers, bool isTrimmed)
+		public void CoreCLR_R2R_ManagedStatic (ApplePlatform platform, string runtimeIdentifiers, bool isTrimmed)
 		{
 			var dict = new Dictionary<string, string> () {
 				{ "UseMonoRuntime", "false" },
 				{ "PublishReadyToRun", "true" },
 				{ "NoDSymUtil", "false" }, // off by default for macOS, but we want to test it, so enable it
+				{ "Registrar", "managed-static" },
 			};
-			Run (platform, runtimeIdentifiers, "Release", $"{platform}-CoreCLR-R2R", isTrimmed, dict);
+			Run (platform, runtimeIdentifiers, "Release", $"{platform}-CoreCLR-R2R-ManagedStatic", isTrimmed, dict);
 		}
 
 		[TestCase (ApplePlatform.iOS, "ios-arm64")]
@@ -92,6 +94,9 @@ public void NativeAOT_TrimmableStatic (ApplePlatform platform, string runtimeIde
 			Run (platform, runtimeIdentifiers, "Release", $"{platform}-NativeAOT-TrimmableStatic", false, dict);
 		}
 
+		[TestCase (ApplePlatform.iOS, "ios-arm64", true)]
+		[TestCase (ApplePlatform.TVOS, "tvos-arm64", true)]
+		[TestCase (ApplePlatform.MacCatalyst, "maccatalyst-arm64", true)]
 		[TestCase (ApplePlatform.MacOSX, "osx-arm64;osx-x64", false)]
 		public void CoreCLR_Interpreter_TrimmableStatic (ApplePlatform platform, string runtimeIdentifiers, bool isTrimmed)
 		{
@@ -104,6 +109,21 @@ public void CoreCLR_Interpreter_TrimmableStatic (ApplePlatform platform, string
 			Run (platform, runtimeIdentifiers, "Release", $"{platform}-CoreCLR-Interpreter-TrimmableStatic", isTrimmed, dict);
 		}
 
+		[TestCase (ApplePlatform.iOS, "ios-arm64", true)]
+		[TestCase (ApplePlatform.TVOS, "tvos-arm64", true)]
+		[TestCase (ApplePlatform.MacCatalyst, "maccatalyst-arm64", true)]
+		[TestCase (ApplePlatform.MacOSX, "osx-arm64;osx-x64", false)]
+		public void CoreCLR_R2R_TrimmableStatic (ApplePlatform platform, string runtimeIdentifiers, bool isTrimmed)
+		{
+			var dict = new Dictionary<string, string> () {
+				{ "UseMonoRuntime", "false" },
+				{ "PublishReadyToRun", "true" },
+				{ "NoDSymUtil", "false" }, // off by default for macOS, but we want to test it, so enable it
+				{ "Registrar", "trimmable-static" },
+			};
+			Run (platform, runtimeIdentifiers, "Release", $"{platform}-CoreCLR-R2R-TrimmableStatic", isTrimmed, dict);
+		}
+
 		// This test will build the SizeTestApp, and capture the resulting app size.
 		// The app size is stored in a file on disk, so we can make sure app size doesn't change (or at least we notice it and we can update the known state).
 		// There's a tolerance in the test for minor app size variances, so if this test fails, the current change might not mean there's a big change,