From e36afc8c491d676e93e99360ed6c1379aabae18c Mon Sep 17 00:00:00 2001
From: Sergio Pedri <sergio0694@live.com>
Date: Sun, 24 Nov 2024 23:13:23 -0800
Subject: [PATCH] Add 'DiagnosticSuppressorTests'

---
 .../DiagnosticSuppressorTests.cs              | 35 +++++++++++++++++++
 .../SourceGeneratorTest.csproj                | 11 ++++--
 2 files changed, 44 insertions(+), 2 deletions(-)
 create mode 100644 src/Tests/SourceGeneratorTest/DiagnosticSuppressorTests.cs

diff --git a/src/Tests/SourceGeneratorTest/DiagnosticSuppressorTests.cs b/src/Tests/SourceGeneratorTest/DiagnosticSuppressorTests.cs
new file mode 100644
index 000000000..050bd94e2
--- /dev/null
+++ b/src/Tests/SourceGeneratorTest/DiagnosticSuppressorTests.cs
@@ -0,0 +1,35 @@
+using System.Threading.Tasks;
+using Generator;
+using Microsoft.CodeAnalysis.Testing;
+using Microsoft.VisualStudio.TestTools.UnitTesting;
+using SourceGeneratorTest.Helpers;
+
+namespace SourceGeneratorTest;
+
+[TestClass]
+public sealed class DiagnosticSuppressorTests
+{
+    public static readonly DiagnosticResult IDE0300 = DiagnosticResult.CompilerWarning("IDE0300");
+
+    [TestMethod]
+    public async Task CollectionExpression_IDE0300_ArrayInitializer_TargetingArray_NotSuppressed()
+    {
+        await new CSharpSuppressorTest<CollectionExpressionIDE0300Suppressor>(
+            """
+            class TestClass
+            {
+                private int[] f = {|IDE0300:{|} 1, 2, 3 };
+
+                void TestMethod()
+                {
+                    int[] a = {|IDE0300:{|} 1, 2, 3 };
+                }
+
+                public int[] P { get; } = {|IDE0300:{|} 1, 2, 3 };
+            }
+            """)
+            .WithAnalyzer("Microsoft.CodeAnalysis.CSharp.UseCollectionExpression.CSharpUseCollectionExpressionForArrayDiagnosticAnalyzer, Microsoft.CodeAnalysis.CSharp.CodeStyle")
+            .WithSpecificDiagnostics(IDE0300)
+            .RunAsync();
+    }
+}
\ No newline at end of file
diff --git a/src/Tests/SourceGeneratorTest/SourceGeneratorTest.csproj b/src/Tests/SourceGeneratorTest/SourceGeneratorTest.csproj
index 4156d5705..931947ccf 100644
--- a/src/Tests/SourceGeneratorTest/SourceGeneratorTest.csproj
+++ b/src/Tests/SourceGeneratorTest/SourceGeneratorTest.csproj
@@ -9,11 +9,18 @@
     <PackageReference Include="MSTest.TestAdapter" Version="3.6.3" />
     <PackageReference Include="MSTest.TestFramework" Version="3.6.3" />
     <PackageReference Include="Microsoft.CodeAnalysis.CSharp.Analyzer.Testing" Version="1.1.2" />
-    <PackageReference Include="Microsoft.CodeAnalysis.CSharp.Workspaces" Version="4.11.0" />
+    <PackageReference Include="Microsoft.CodeAnalysis.CSharp.Workspaces" Version="4.12.0-3.final" />
   </ItemGroup>
 
+  <!-- Directly reference these two analyzers as direct references, so we can instantiate the analyzers we need for the tests -->
   <ItemGroup>
-    <ProjectReference Include="..\..\Authoring\WinRT.SourceGenerator.Roslyn4080\WinRT.SourceGenerator.Roslyn4080.csproj" />
+    <PackageReference Include="Microsoft.CodeAnalysis.CSharp.CodeStyle" Version="4.11.0" IncludeAssets="none" PrivateAssets="all" GeneratePathProperty="true" />
+    <Reference Include="$(PkgMicrosoft_CodeAnalysis_CSharp_CodeStyle)\analyzers\dotnet\cs\Microsoft.CodeAnalysis.CodeStyle.dll" />
+    <Reference Include="$(PkgMicrosoft_CodeAnalysis_CSharp_CodeStyle)\analyzers\dotnet\cs\Microsoft.CodeAnalysis.CSharp.CodeStyle.dll" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\..\Authoring\WinRT.SourceGenerator.Roslyn4120\WinRT.SourceGenerator.Roslyn4120.csproj" />
     <ProjectReference Include="..\..\WinRT.Runtime\WinRT.Runtime.csproj" />
   </ItemGroup>
 </Project>