From aaa5defdf0655b41e4b61472c58b7c2fe5f4c718 Mon Sep 17 00:00:00 2001
From: Huo Yaoyuan <huoyaoyuan@hotmail.com>
Date: Wed, 15 Jun 2022 17:01:37 +0800
Subject: [PATCH] Add test using private reflection

---
 .../Interop/CommandLine/CommandLineTest.cs    | 34 +++++++++++++++++++
 .../CommandLine/CommandLineTest.csproj        | 12 +++++++
 2 files changed, 46 insertions(+)
 create mode 100644 src/tests/Interop/CommandLine/CommandLineTest.cs
 create mode 100644 src/tests/Interop/CommandLine/CommandLineTest.csproj

diff --git a/src/tests/Interop/CommandLine/CommandLineTest.cs b/src/tests/Interop/CommandLine/CommandLineTest.cs
new file mode 100644
index 0000000000000..4c78b6e1c8787
--- /dev/null
+++ b/src/tests/Interop/CommandLine/CommandLineTest.cs
@@ -0,0 +1,34 @@
+using System;
+using System.IO;
+using System.Reflection;
+using TestLibrary;
+using Xunit;
+
+namespace CommandLineTest
+{
+    class Program
+    {
+        int Main()
+        {
+            // Currently native command line is only implemented on CoreCLR Windows
+            if (!TestLibrary.Utilities.IsMonoRuntime && !TestLibrary.Utilities.IsNativeAot)
+            {
+                // Clear the command line args set for managed entry point
+                var field = typeof(Environment).GetField("s_commandLineArgs", BindingFlags.Static | BindingFlags.NonPublic);
+                Assert.NotNull(field);
+                field.SetValue(null, null);
+
+                string[] args = Environment.GetCommandLineArgs();
+                if (OperatingSystem.IsWindows())
+                {
+                    // The command line should be "corerun assemblyname.dll" for coreclr test
+                    Assert.Equal(2, args.Length);
+                    Assert.Equal("corerun", Path.GetFileNameWithoutExtension(args[0]));
+                    Assert.Equal(typeof(Program).Assembly.GetName().Name, Path.GetFileNameWithoutExtension(args[1]));
+                }
+            }
+
+            return 100;
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/tests/Interop/CommandLine/CommandLineTest.csproj b/src/tests/Interop/CommandLine/CommandLineTest.csproj
new file mode 100644
index 0000000000000..df25278d2bd86
--- /dev/null
+++ b/src/tests/Interop/CommandLine/CommandLineTest.csproj
@@ -0,0 +1,12 @@
+<Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
+  </PropertyGroup>
+  <ItemGroup>
+    <Compile Include="CommandLineTest.cs" />
+  </ItemGroup>
+  <ItemGroup>
+    <ProjectReference Include="$(TestSourceDir)Common/CoreCLRTestLibrary/CoreCLRTestLibrary.csproj" />
+  </ItemGroup>
+</Project>