Add unit tests for UsesCodeSignedAssemblies()

Used in MshSnapinInfo.PSSnapInReader

src/monad

@@ -1 +1 @@
-Subproject commit fbfb5a555ae4fa6d465eba59fff6edc281cdd536
+Subproject commit 3ca3331f4bba19ed57595c173264a267878e0b65

src/ps_test/ps_test.cs

@@ -12,6 +12,7 @@ namespace PSTests
             PlatformTests.TestIsLinux();
             PlatformTests.TestHasCom();
             PlatformTests.TestHasAmsi();
+            PlatformTests.TestUsesCodeSignedAssemblies();
 
             PSTypeExtensionsTests.TestIsComObject();
 
@@ -20,6 +21,10 @@ namespace PSTests
             SecuritySupportTests.TestCloseSession();
             SecuritySupportTests.TestUninitialize();
 
+            MshSnapinInfoTests mshSnapinInfoTests = new MshSnapinInfoTests();
+            mshSnapinInfoTests.TestReadRegistryInfo();
+            mshSnapinInfoTests.TestReadCoreEngineSnapIn();
+
             Console.WriteLine("Finished running tests");
         }
     }

src/ps_test/test_CorePsPlatform.cs

@@ -20,5 +20,10 @@ namespace PSTests
         {
             Assert.False(Platform.HasAmsi());
         }
+
+        public static void TestUsesCodeSignedAssemblies()
+        {
+            Assert.False(Platform.UsesCodeSignedAssemblies());
+        }
     }
 }

src/ps_test/test_MshSnapinInfo.cs

@@ -0,0 +1,25 @@
+using Xunit;
+using System;
+using System.Management.Automation;
+
+namespace PSTests
+{
+    // Not static because a test requires non-const variables
+    public class MshSnapinInfoTests
+    {
+        // Test that it does not throw an exception
+        public void TestReadRegistryInfo()
+        {
+            Version someVersion = null;
+            string someString = null;
+            PSSnapInReader.ReadRegistryInfo(out someVersion, out someString, out someString, out someString, out someString, out someVersion);
+        }
+
+        // PublicKeyToken is null on Linux
+        public void TestReadCoreEngineSnapIn()
+        {
+            PSSnapInInfo pSSnapInInfo = PSSnapInReader.ReadCoreEngineSnapIn();
+            Assert.Contains("PublicKeyToken=null", pSSnapInInfo.AssemblyName);
+        }
+    }
+}