Fix coverage lapses that appear only in CI.

Author: sharpjs

PSql.Deploy.Tests/Internal/PrivateAssemblyLoadContextTests.cs

@@ -1,13 +1,26 @@
 // Copyright Subatomix Research Inc.
 // SPDX-License-Identifier: MIT
 
+using System.Runtime.Loader;
+
 namespace PSql.Deploy.Internal;
 
 [TestFixture]
 public class PrivateAssemblyLoadContextTests
 {
     // This test class contains additional tests to achieve 100% code coverage.
 
+    [Test]
+    public void HandleResolvingInDefaultLoadContext_NotPrivate()
+    {
+        PrivateAssemblyLoadContext
+            .HandleResolvingInDefaultLoadContext(
+                AssemblyLoadContext.Default,
+                new("NotThePrivateAssembly")
+            )
+            .ShouldBeNull();
+    }
+
     [Test]
     public void Load_Empty()
     {

PSql.Deploy/Commands/InvokeSqlMigrationsCommand.cs

@@ -145,6 +145,9 @@ private bool ShouldProcess(SqlTargetDatabaseGroup group)
 
     [Conditional("DEBUG")]
     [MemberNotNull(nameof(_session))]
+#if !DEBUG
+    [ExcludeFromCodeCoverage(Justification = "Uninvokable due to ConditionalAttribute.")]
+#endif
     internal void AssumeBeginProcessingInvoked()
     {
         if (_session is null)

PSql.Deploy/Commands/InvokeSqlSeedCommand.cs

@@ -157,6 +157,9 @@ private bool ShouldProcess(SqlTargetDatabaseGroup group)
 
     [Conditional("DEBUG")]
     [MemberNotNull(nameof(_session))]
+#if !DEBUG
+    [ExcludeFromCodeCoverage(Justification = "Uninvokable due to ConditionalAttribute.")]
+#endif
     internal void AssumeBeginProcessingInvoked()
     {
         if (_session is null)

PSql.Deploy/Commands/TestAsyncPSCmdletCommand.cs

@@ -97,7 +97,7 @@ private void InvokeTestCase(TestMoment currentMoment)
             case TestCase.StopProcessing:                 TestStopProcessing();                 break;
             case TestCase.ThrowTerminatingError:          TestThrowTerminatingError();          break;
             case TestCase.MultipleDispose:                TestMultipleDispose();                break;
-            case TestCase.UnmanagedDispose:               TestUnmanagedDispose();               break;
+            default:   /* UnmanagedDispose: */            TestUnmanagedDispose();               break;
         }
     }
 

PSql.Deploy/Commands/TestCmdletExtensionsCommand.cs

@@ -40,7 +40,7 @@ protected override void ProcessRecord()
                 WriteObject(this.GetCurrentPath());
                 break;
 
-            case TestCase.WriteHost:
+            default: // case TestCase.WriteHost:
                 this.WriteHost(Message);
                 break;
         }

PSql.Deploy/Internal/PrivateAssemblyLoadContext.cs

@@ -74,6 +74,9 @@ protected override IntPtr LoadUnmanagedDll(string unmanagedDllName)
         return _loadedNative.GetOrAdd(unmanagedDllName, LoadUnmanagedDllCore);
     }
 
+    [ExcludeFromCodeCoverage(
+        Justification = "This product ships no unmanaged library for non-Windows platforms."
+    )]
     private IntPtr LoadUnmanagedDllCore(string name)
     {
         // Try to resolve and load