Do not actually connect to target in -WhatIf mode seeding.

Author: sharpjs

PSql.Deploy.Engine.Tests/Seeds/WhatIfSeedTargetConnectionTests.cs

@@ -32,6 +32,14 @@ public void Construct_NullConnection()
         });
     }
 
+    [Test]
+    public async Task OpenAsync()
+    {
+        _logger.Setup(l => l.Log("", 0, 0, 0, "Would open connection."));
+
+        await _outer.OpenAsync(Cancellation.Token);
+    }
+
     [Test]
     public async Task PrepareAsync()
     {

PSql.Deploy.Engine/Core/WhatIfTargetConnection.cs

@@ -43,7 +43,7 @@ public ISqlMessageLogger Logger
         => _connection.Logger;
 
     /// <inheritdoc/>
-    public Task OpenAsync(CancellationToken cancellation)
+    public virtual Task OpenAsync(CancellationToken cancellation)
         => _connection.OpenAsync(cancellation);
 
     /// <inheritdoc/>

PSql.Deploy.Engine/Seeds/WhatIfSeedTargetConnection.cs

@@ -19,6 +19,13 @@ public WhatIfSeedTargetConnection(ISeedTargetConnection connection)
         => (ISeedTargetConnection) base.UnderlyingConnection;
 #endif
 
+    /// <inheritdoc/>
+    public override Task OpenAsync(CancellationToken cancellation)
+    {
+        Log("Would open connection.");
+        return Task.CompletedTask;
+    }
+
     /// <inheritdoc/>
     public Task PrepareAsync(Guid runId, int workerId, CancellationToken cancellation = default)
     {