Complete managed macOS platform bring-up

dotnet/tests/VoiceCat.Tests/TofuTlsTests.cs

@@ -4,6 +4,22 @@ namespace VoiceCat.Tests;
 
 public class TofuTlsTests
 {
+    [Fact]
+    public void PinCreatesMissingParentDirectory()
+    {
+        string root = Path.Combine(Path.GetTempPath(), "voicecat-tofu-parent-" + Guid.NewGuid());
+        string path = Path.Combine(root, "nested", "pins.txt");
+        try
+        {
+            var store = new TofuStore(path);
+            store.Pin("localhost", 8384, new string('a', 64));
+
+            Assert.True(File.Exists(path));
+            Assert.Equal(TofuStatus.Matched, new TofuStore(path).Check("localhost", 8384, new string('A', 64)));
+        }
+        finally { if (Directory.Exists(root)) Directory.Delete(root, true); }
+    }
+
     [Fact]
     public void RealHandshakesRequireAcceptanceAndRejectChangedCertificatesAfterRestart()
     {