Fix failing tests caused by new file existence validation

Co-authored-by: marcpopMSFT <[email protected]>

Author: Copilot

test/dotnet.Tests/CommandTests/MSBuild/GivenDotnetRunInvocation.cs

@@ -25,7 +25,7 @@ public GivenDotnetRunInvocation(ITestOutputHelper log)
         [InlineData(new string[] { "-p", "prop1=true" }, new string[] { "--property:prop1=true" })]
         [InlineData(new string[] { "-p", "prop1=true", "-p", "prop2=false" }, new string[] { "--property:prop1=true", "--property:prop2=false" })]
         [InlineData(new string[] { "-p:prop1=true;prop2=false" }, new string[] { "--property:prop1=true", "--property:prop2=false" })]
-        [InlineData(new string[] { "-p", "MyProject.csproj", "-p:prop1=true" }, new string[] { "--property:prop1=true" })]
+        [InlineData(new string[] { "-p", "HelloWorld.csproj", "-p:prop1=true" }, new string[] { "--property:prop1=true" })]
         [InlineData(new string[] { "--disable-build-servers" }, new string[] { "--property:UseRazorBuildServer=false", "--property:UseSharedCompilation=false", "/nodeReuse:false" })]
         public void MsbuildInvocationIsCorrect(string[] args, string[] expectedArgs)
         {

test/dotnet.Tests/CommandTests/Run/RunParserTests.cs

@@ -17,8 +17,23 @@ public RunParserTests(ITestOutputHelper output)
         [Fact]
         public void RunParserCanGetArgumentFromDoubleDash()
         {
-            var runCommand = RunCommand.FromArgs(new[] { "--project", "foo.csproj", "--", "foo" });
-            runCommand.Args.Single().Should().Be("foo");
+            // Create a temporary project file to ensure file validation passes
+            var tempDir = Path.GetTempPath();
+            var projectPath = Path.Combine(tempDir, "foo.csproj");
+            File.WriteAllText(projectPath, "<Project Sdk=\"Microsoft.NET.Sdk\"><PropertyGroup><OutputType>Exe</OutputType><TargetFramework>net8.0</TargetFramework></PropertyGroup></Project>");
+            
+            try
+            {
+                var runCommand = RunCommand.FromArgs(new[] { "--project", projectPath, "--", "foo" });
+                runCommand.Args.Single().Should().Be("foo");
+            }
+            finally
+            {
+                if (File.Exists(projectPath))
+                {
+                    File.Delete(projectPath);
+                }
+            }
         }
     }
 }