Add test

Author: marinasundstrom

CheckedExceptions.Tests/CheckedExceptionsAnalyzerTests.Constructors.cs

@@ -0,0 +1,47 @@
+using Microsoft.CodeAnalysis;
+using Microsoft.CodeAnalysis.Testing;
+
+namespace Sundstrom.CheckedExceptions.Tests;
+
+using Verifier = CSharpAnalyzerVerifier<CheckedExceptionsAnalyzer, DefaultVerifier>;
+
+partial class CheckedExceptionsAnalyzerTests
+{
+    [Fact]
+    public async Task ThrowingConstructor_WithThrowsAttribute_ShouldReportDiagnostics_WhenCallerDoesNotHandleOrDeclare()
+    {
+        var test = /* lang=c#-test */ """
+        using System;
+
+        public class ThrowingObject
+        {
+            [Throws(typeof(InvalidOperationException))]
+            public ThrowingObject()
+            {
+                throw new InvalidOperationException();
+            }
+        }
+
+        public class TestClass
+        {
+            public void ExplicitNew()
+            {
+                ThrowingObject obj = new ThrowingObject(); // ❗ Expect diagnostic
+            }
+
+            public void TargetTypedNew()
+            {
+                ThrowingObject obj = new(); // ❗ Expect diagnostic
+            }
+        }
+        """;
+
+        var expected1 = Verifier.MightBeThrown("InvalidOperationException")
+            .WithSpan(16, 30, 16, 50); // new ThrowingObject()
+
+        var expected2 = Verifier.MightBeThrown("InvalidOperationException")
+            .WithSpan(21, 30, 21, 35); // new()
+
+        await Verifier.VerifyAnalyzerAsync(test, expected1, expected2);
+    }
+}